build

releases/v5.1.0 (#499 )
* chore(release): bump version to 5.1.0 * chore(release): update package-lock.json to 5.1.0
2026-06-21 18:59:27 +08:00 · 2026-03-03 21:17:31 +00:00 · 2026-03-03 13:16:48 -08:00 · 2026-03-03 12:34:01 -08:00 · 2026-03-03 17:28:00 +00:00 · 2026-03-03 12:07:07 -05:00
82 changed files with 32458 additions and 10531 deletions
@@ -0,0 +1,53 @@
+name: 'Setup Minikube Test Environment'
+description: 'Common setup steps for minikube integration tests'
+inputs:
+   install-smi:
+      description: 'Install Linkerd SMI for service mesh tests'
+      required: false
+      default: 'false'
+
+runs:
+   using: 'composite'
+   steps:
+      - name: Install dependencies
+        shell: bash
+        run: |
+           rm -rf node_modules/
+           npm install
+
+      - name: Build
+        shell: bash
+        run: npm run build
+
+      - name: Install conntrack
+        shell: bash
+        run: sudo apt-get install -y conntrack
+
+      - uses: Azure/setup-kubectl@776406bce94f63e41d621b960d78ee25c8b76ede # v4.0.1
+        name: Install Kubectl
+
+      - id: setup-minikube
+        name: Setup Minikube
+        uses: medyagh/setup-minikube@e9e035a86bbc3caea26a450bd4dbf9d0c453682e # v0.0.21
+        with:
+           minikube-version: 1.37.0
+           kubernetes-version: 1.31.0
+           driver: 'docker'
+
+      - name: Install Linkerd and SMI
+        if: inputs.install-smi == 'true'
+        shell: bash
+        run: |
+           curl --proto '=https' --tlsv1.2 -sSfL https://run.linkerd.io/install-edge | sh
+           export PATH=$PATH:/home/runner/.linkerd2/bin
+           curl -sL https://linkerd.github.io/linkerd-smi/install | sh
+           kubectl apply -f https://github.com/kubernetes-sigs/gateway-api/releases/download/v1.2.0/standard-install.yaml
+
+           linkerd install --crds | kubectl apply -f -
+           linkerd install --set proxyInit.runAsRoot=true | kubectl apply -f -
+           linkerd smi install | kubectl apply -f -
+
+      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # 6.1.0
+        name: Install Python
+        with:
+           python-version: '3.x'
@@ -16,7 +16,7 @@ jobs:

      steps:
         - name: Checkout repository
-           uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 #v4.2.2
+           uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd #v6.0.2
           with:
              # We must fetch at least the immediate parents so that if this is
              # a pull request then we can checkout the head.
@@ -24,7 +24,7 @@ jobs:

         # Initializes the CodeQL tools for scanning.
         - name: Initialize CodeQL
-           uses: github/codeql-action/init@51f77329afa6477de8c49fc9c7046c15b9a4e79d #v3.29.5
+           uses: github/codeql-action/init@c793b717bc78562f491db7b0e93a3a178b099162 #v3.29.5
           # Override language selection by uncommenting this and choosing your languages
           # with:
           #   languages: go, javascript, csharp, python, cpp, java
@@ -32,7 +32,7 @@ jobs:
         # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
         # If this step fails, then you should remove it and run the build manually (see below)
         - name: Autobuild
-           uses: github/codeql-action/autobuild@51f77329afa6477de8c49fc9c7046c15b9a4e79d #v3.29.5
+           uses: github/codeql-action/autobuild@c793b717bc78562f491db7b0e93a3a178b099162 #v3.29.5

         # ℹ️ Command-line programs to run using the OS shell.
         # 📚 https://git.io/JvXDl
@@ -46,4 +46,4 @@ jobs:
         #   make release

         - name: Perform CodeQL Analysis
-           uses: github/codeql-action/analyze@51f77329afa6477de8c49fc9c7046c15b9a4e79d #v3.29.5
+           uses: github/codeql-action/analyze@c793b717bc78562f491db7b0e93a3a178b099162 #v3.29.5
@@ -13,7 +13,7 @@ jobs:

      # Steps represent a sequence of tasks that will be executed as part of the job
      steps:
-         - uses: actions/stale@5bef64f19d7facfb25b37b414482c7164d639639 # v9.1.0
+         - uses: actions/stale@b5d41d4e1d5dceea10e7104786b73624c18a190f # v10.2.0
           name: Setting issue as idle
           with:
              repo-token: ${{ secrets.GITHUB_TOKEN }}
@@ -24,7 +24,7 @@ jobs:
              operations-per-run: 100
              exempt-issue-labels: 'backlog'

-         - uses: actions/stale@5bef64f19d7facfb25b37b414482c7164d639639 # v9.1.0
+         - uses: actions/stale@b5d41d4e1d5dceea10e7104786b73624c18a190f # v10.2.0
           name: Setting PR as idle
           with:
              repo-token: ${{ secrets.GITHUB_TOKEN }}
@@ -10,7 +10,7 @@ jobs:
      runs-on: ubuntu-latest
      steps:
         - name: Checkout Repository
-           uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+           uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         - name: install deps
           run: npm install

@@ -18,39 +18,15 @@ jobs:
         KUBECONFIG: /home/runner/.kube/config
         NAMESPACE: test-${{ github.run_id }}
      steps:
-         - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+         - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

-         - name: Install dependencies
-           run: |
-              rm -rf node_modules/
-              npm install
-         - name: Install ncc
-           run: npm i -g @vercel/ncc
-         - name: Install conntrack
-           run: sudo apt-get install -y conntrack
-         - name: Build
-           run: ncc build src/run.ts -o lib
-
-         - uses: Azure/setup-kubectl@776406bce94f63e41d621b960d78ee25c8b76ede # v4.0.1
-           name: Install Kubectl
-
-         - id: setup-minikube
-           name: Setup Minikube
-           uses: medyagh/setup-minikube@e3c7f79eb1e997eabccc536a6cf318a2b0fe19d9 # v0.0.20
-           with:
-              minikube-version: 1.34.0
-              kubernetes-version: 1.31.0
-              driver: 'none'
-           timeout-minutes: 3
+         - uses: ./.github/actions/minikube-setup
+           name: Setup Minikube Environment
+           timeout-minutes: 5

         - name: Create namespace to run tests
           run: kubectl create ns ${{ env.NAMESPACE }}

-         - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
-           name: Install Python
-           with:
-              python-version: '3.x'
-
         - name: Cleaning any previously created items
           run: |
              python test/integration/k8s-deploy-delete.py 'Service' 'all' ${{ env.NAMESPACE }}
@@ -12,45 +12,21 @@ on:

 jobs:
   run-integration-test:
-      name: Run Minikube Integration Tests
+      name: Blue-Green Ingress Tests
      runs-on: ubuntu-22.04
      env:
         KUBECONFIG: /home/runner/.kube/config
         NAMESPACE: test-${{ github.run_id }}
      steps:
-         - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+         - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

-         - name: Install dependencies
-           run: |
-              rm -rf node_modules/
-              npm install
-         - name: Install ncc
-           run: npm i -g @vercel/ncc
-         - name: Install conntrack
-           run: sudo apt-get install -y conntrack
-         - name: Build
-           run: ncc build src/run.ts -o lib
-
-         - uses: Azure/setup-kubectl@776406bce94f63e41d621b960d78ee25c8b76ede # v4.0.1
-           name: Install Kubectl
-
-         - id: setup-minikube
-           name: Setup Minikube
-           uses: medyagh/setup-minikube@e3c7f79eb1e997eabccc536a6cf318a2b0fe19d9 # v0.0.20
-           with:
-              minikube-version: 1.34.0
-              kubernetes-version: 1.31.0
-              driver: 'none'
-           timeout-minutes: 3
+         - uses: ./.github/actions/minikube-setup
+           name: Setup Minikube Environment
+           timeout-minutes: 5

         - name: Create namespace to run tests
           run: kubectl create ns ${{ env.NAMESPACE }}

-         - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
-           name: Install Python
-           with:
-              python-version: '3.x'
-
         - name: Cleaning any previously created items
           run: |
              python test/integration/k8s-deploy-delete.py 'Service' 'nginx-service' ${{ env.NAMESPACE }}
@@ -12,45 +12,21 @@ on:

 jobs:
   run-integration-test:
-      name: Run Minikube Integration Tests
+      name: Blue-Green Service Tests
      runs-on: ubuntu-22.04
      env:
         KUBECONFIG: /home/runner/.kube/config
         NAMESPACE: test-${{ github.run_id }}
      steps:
-         - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+         - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

-         - name: Install dependencies
-           run: |
-              rm -rf node_modules/
-              npm install
-         - name: Install ncc
-           run: npm i -g @vercel/ncc
-         - name: Install conntrack
-           run: sudo apt-get install -y conntrack
-         - name: Build
-           run: ncc build src/run.ts -o lib
-
-         - uses: Azure/setup-kubectl@776406bce94f63e41d621b960d78ee25c8b76ede # v4.0.1
-           name: Install Kubectl
-
-         - id: setup-minikube
-           name: Setup Minikube
-           uses: medyagh/setup-minikube@e3c7f79eb1e997eabccc536a6cf318a2b0fe19d9 # v0.0.20
-           with:
-              minikube-version: 1.34.0
-              kubernetes-version: 1.31.0
-              driver: 'none'
-           timeout-minutes: 3
+         - uses: ./.github/actions/minikube-setup
+           name: Setup Minikube Environment
+           timeout-minutes: 5

         - name: Create namespace to run tests
           run: kubectl create ns ${{ env.NAMESPACE }}

-         - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
-           name: Install Python
-           with:
-              python-version: '3.x'
-
         - name: Cleaning any previously created items
           run: |
              python test/integration/k8s-deploy-delete.py 'Service' 'all' ${{ env.NAMESPACE }}
@@ -12,56 +12,23 @@ on:

 jobs:
   run-integration-test:
-      name: Run Minikube Integration Tests
+      name: Blue-Green SMI Tests
      runs-on: ubuntu-22.04
      env:
         KUBECONFIG: /home/runner/.kube/config
         NAMESPACE: test-${{ github.run_id }}
      steps:
-         - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+         - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

-         - name: Install dependencies
-           run: |
-              rm -rf node_modules/
-              npm install
-         - name: Install ncc
-           run: npm i -g @vercel/ncc
-         - name: Install conntrack
-           run: sudo apt-get install -y conntrack
-         - name: Build
-           run: ncc build src/run.ts -o lib
-
-         - uses: Azure/setup-kubectl@776406bce94f63e41d621b960d78ee25c8b76ede # v4.0.1
-           name: Install Kubectl
-
-         - id: setup-minikube
-           name: Setup Minikube
-           uses: medyagh/setup-minikube@e3c7f79eb1e997eabccc536a6cf318a2b0fe19d9 # v0.0.20
+         - uses: ./.github/actions/minikube-setup
+           name: Setup Minikube Environment
+           timeout-minutes: 5
           with:
-              minikube-version: 1.34.0
-              kubernetes-version: 1.31.0
-              driver: 'none'
-           timeout-minutes: 3
-
-         - name: Install linkerd and add controlplane to cluster
-           run: |
-              curl --proto '=https' --tlsv1.2 -sSfL https://run.linkerd.io/install-edge | sh
-              export PATH=$PATH:/home/runner/.linkerd2/bin
-              curl -sL https://linkerd.github.io/linkerd-smi/install | sh
-              kubectl apply -f https://github.com/kubernetes-sigs/gateway-api/releases/download/v1.2.0/standard-install.yaml
-
-              linkerd install --crds | kubectl apply -f -
-              linkerd install --set proxyInit.runAsRoot=true | kubectl apply -f -
-              linkerd smi install | kubectl apply -f -
+              install-smi: 'true'

         - name: Create namespace to run tests
           run: kubectl create ns ${{ env.NAMESPACE }}

-         - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
-           name: Install Python
-           with:
-              python-version: '3.x'
-
         - name: Cleaning any previously created items
           run: |
              python test/integration/k8s-deploy-delete.py 'Service' 'all' ${{ env.NAMESPACE }}
@@ -12,45 +12,21 @@ on:

 jobs:
   run-integration-test:
-      name: Run Minikube Integration Tests
+      name: Canary Pod Tests
      runs-on: ubuntu-22.04
      env:
         KUBECONFIG: /home/runner/.kube/config
         NAMESPACE: test-${{ github.run_id }}
      steps:
-         - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+         - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

-         - name: Install dependencies
-           run: |
-              rm -rf node_modules/
-              npm install
-         - name: Install ncc
-           run: npm i -g @vercel/ncc
-         - name: Install conntrack
-           run: sudo apt-get install -y conntrack
-         - name: Build
-           run: ncc build src/run.ts -o lib
-
-         - uses: Azure/setup-kubectl@776406bce94f63e41d621b960d78ee25c8b76ede # v4.0.1
-           name: Install Kubectl
-
-         - id: setup-minikube
-           name: Setup Minikube
-           uses: medyagh/setup-minikube@e3c7f79eb1e997eabccc536a6cf318a2b0fe19d9 # v0.0.20
-           with:
-              minikube-version: 1.34.0
-              kubernetes-version: 1.31.0
-              driver: 'none'
-           timeout-minutes: 3
+         - uses: ./.github/actions/minikube-setup
+           name: Setup Minikube Environment
+           timeout-minutes: 5

         - name: Create namespace to run tests
           run: kubectl create ns ${{ env.NAMESPACE }}

-         - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
-           name: Install Python
-           with:
-              python-version: '3.x'
-
         - name: Cleaning any previously created items
           run: |
              python test/integration/k8s-deploy-delete.py 'Service' 'all' ${{ env.NAMESPACE }}
@@ -12,56 +12,23 @@ on:

 jobs:
   run-integration-test:
-      name: Run Minikube Integration Tests
+      name: Canary SMI Tests
      runs-on: ubuntu-22.04
      env:
         KUBECONFIG: /home/runner/.kube/config
         NAMESPACE: test-${{ github.run_id }}
      steps:
-         - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+         - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

-         - name: Install dependencies
-           run: |
-              rm -rf node_modules/
-              npm install
-         - name: Install ncc
-           run: npm i -g @vercel/ncc
-         - name: Install conntrack
-           run: sudo apt-get install -y conntrack
-         - name: Build
-           run: ncc build src/run.ts -o lib
-
-         - uses: Azure/setup-kubectl@776406bce94f63e41d621b960d78ee25c8b76ede # v4.0.1
-           name: Install Kubectl
-
-         - id: setup-minikube
-           name: Setup Minikube
-           uses: medyagh/setup-minikube@e3c7f79eb1e997eabccc536a6cf318a2b0fe19d9 # v0.0.20
+         - uses: ./.github/actions/minikube-setup
+           name: Setup Minikube Environment
+           timeout-minutes: 5
           with:
-              minikube-version: 1.34.0
-              kubernetes-version: 1.31.0
-              driver: 'none'
-           timeout-minutes: 3
-
-         - name: Install Linkerd and SMI
-           run: |
-              curl --proto '=https' --tlsv1.2 -sSfL https://run.linkerd.io/install-edge | sh
-              export PATH=$PATH:/home/runner/.linkerd2/bin
-              curl -sL https://linkerd.github.io/linkerd-smi/install | sh
-              kubectl apply -f https://github.com/kubernetes-sigs/gateway-api/releases/download/v1.2.0/standard-install.yaml
-
-              linkerd install --crds | kubectl apply -f -
-              linkerd install --set proxyInit.runAsRoot=true | kubectl apply -f -
-              linkerd smi install | kubectl apply -f -
+              install-smi: 'true'

         - name: Create namespace to run tests
           run: kubectl create ns ${{ env.NAMESPACE }}

-         - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
-           name: Install Python
-           with:
-              python-version: '3.x'
-
         - name: Cleaning any previously created items
           run: |
              python test/integration/k8s-deploy-delete.py 'Service' 'all' ${{ env.NAMESPACE }}
@@ -14,37 +14,18 @@ on:

 jobs:
   run-integration-test:
-      name: Run Namespace Optional Integration Tests
+      name: Namespace Optional Tests
      runs-on: ubuntu-22.04
      env:
         KUBECONFIG: /home/runner/.kube/config
         NAMESPACE1: integration-test-namespace1-${{ github.run_id }}
         NAMESPACE2: integration-test-namespace2-${{ github.run_id }}
      steps:
-         - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+         - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

-         - name: Install dependencies
-           run: |
-              rm -rf node_modules/
-              npm install
-         - name: Install ncc
-           run: npm i -g @vercel/ncc
-         - name: Install conntrack
-           run: sudo apt-get install -y conntrack
-         - name: Build
-           run: ncc build src/run.ts -o lib
-
-         - uses: Azure/setup-kubectl@776406bce94f63e41d621b960d78ee25c8b76ede # v4.0.1
-           name: Install Kubectl
-
-         - id: setup-minikube
-           name: Setup Minikube
-           uses: medyagh/setup-minikube@e3c7f79eb1e997eabccc536a6cf318a2b0fe19d9 # v0.0.20
-           with:
-              minikube-version: 1.34.0
-              kubernetes-version: 1.31.0
-              driver: 'none'
-           timeout-minutes: 3
+         - uses: ./.github/actions/minikube-setup
+           name: Setup Minikube Environment
+           timeout-minutes: 5

         - name: Create namespaces for tests
           run: |
@@ -52,11 +33,6 @@ jobs:
              kubectl create ns ${{ env.NAMESPACE2 }}
              kubectl create ns test-namespace

-         - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
-           name: Install Python
-           with:
-              python-version: '3.x'
-
         - name: Cleaning any previously created items
           run: |
              python test/integration/k8s-deploy-delete.py 'Deployment' 'all' ${{ env.NAMESPACE1 }}
@@ -19,16 +19,16 @@ jobs:
         contents: read
         id-token: write
      steps:
-         - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+         - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

         - name: Install dependencies
           run: |
              rm -rf node_modules/
              npm install
-         - name: Install ncc
-           run: npm i -g @vercel/ncc
+
         - name: Build
-           run: ncc build src/run.ts -o lib
+           run: npm run build
+
         - name: Azure login
           uses: azure/login@v2.3.0
           with:
@@ -51,7 +51,7 @@ jobs:
           run: |
              az aks command invoke --resource-group ${{ env.NAMESPACE }} --name ${{ env.NAMESPACE }} --command "kubectl create ns ${{ env.NAMESPACE }}"

-         - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
+         - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # 6.2.0
           name: Install Python
           with:
              python-version: '3.x'
@@ -12,45 +12,21 @@ on:

 jobs:
   run-integration-test:
-      name: Run Minikube Integration Tests
+      name: Resource Annotation Tests
      runs-on: ubuntu-22.04
      env:
         KUBECONFIG: /home/runner/.kube/config
         NAMESPACE: test-${{ github.run_id }}
      steps:
-         - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+         - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

-         - name: Install dependencies
-           run: |
-              rm -rf node_modules/
-              npm install
-         - name: Install ncc
-           run: npm i -g @vercel/ncc
-         - name: Install conntrack
-           run: sudo apt-get install -y conntrack
-         - name: Build
-           run: ncc build src/run.ts -o lib
-
-         - uses: Azure/setup-kubectl@776406bce94f63e41d621b960d78ee25c8b76ede # v4.0.1
-           name: Install Kubectl
-
-         - id: setup-minikube
-           name: Setup Minikube
-           uses: medyagh/setup-minikube@e3c7f79eb1e997eabccc536a6cf318a2b0fe19d9 # v0.0.20
-           with:
-              minikube-version: 1.34.0
-              kubernetes-version: 1.31.0
-              driver: 'none'
-           timeout-minutes: 3
+         - uses: ./.github/actions/minikube-setup
+           name: Setup Minikube Environment
+           timeout-minutes: 5

         - name: Create namespace to run tests
           run: kubectl create ns ${{ env.NAMESPACE }}

-         - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
-           name: Install Python
-           with:
-              python-version: '3.x'
-
         - name: Cleaning any previously created items
           run: |
              python test/integration/k8s-deploy-delete.py 'Service' 'all' ${{ env.NAMESPACE }}
@@ -14,7 +14,7 @@ jobs:
      name: Run Unit Tests
      runs-on: ubuntu-latest
      steps:
-         - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+         - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         - run: |
              npm install
              npm test
@@ -2,6 +2,5 @@ node_modules

 .DS_Store
 .idea
-lib/

 coverage/
@@ -1,3 +1,9 @@
+npm run typecheck || {
+  echo ""
+  echo "❌ Type check failed."
+  echo "💡 Run 'npm run typecheck' to see errors."
+  exit 1
+}
 npm test
 npm run format-check || {
  echo ""
@@ -1,5 +1,14 @@
 # Changelog

+## [5.1.0] - 2026-03-03
+
+### Added
+
+- #458 [Ensure error messages display the correct namespace](https://github.com/Azure/k8s-deploy/pull/458)
+- #482 [docker driver](https://github.com/Azure/k8s-deploy/pull/482)
+- #492 [Migrate to esbuild/Vitest and upgrade @actions/\* to ESM-only versions](https://github.com/Azure/k8s-deploy/pull/492)
+- #498 [Add typecheck to build script](https://github.com/Azure/k8s-deploy/pull/498)
+
 ## [5.0.4] - 2025-08-05

 ### Added
@@ -1,20 +0,0 @@
-module.exports = {
-   moduleFileExtensions: ['js', 'ts'],
-   testEnvironment: 'node',
-   testMatch: ['**/*.test.ts'],
-   transform: {
-      '\\.[jt]sx?$': 'babel-jest'
-   },
-   transformIgnorePatterns: [
-      'node_modules/(?!' +
-         [
-            '@octokit',
-            'universal-user-agent',
-            'before-after-hook',
-            'minimist'
-         ].join('|') +
-         ')'
-   ],
-   verbose: true,
-   testTimeout: 9000
-}
@@ -1,40 +1,36 @@
 {
   "name": "k8s-deploy-action",
-   "version": "5.0.0",
+   "version": "5.1.0",
   "author": "Deepak Sattiraju",
   "license": "MIT",
+   "type": "module",
   "scripts": {
-      "prebuild": "npm i @vercel/ncc",
-      "build": "ncc build src/run.ts -o lib",
-      "test": "jest",
-      "coverage": "jest --coverage=true",
+      "build": "tsc --noEmit && esbuild src/run.ts --bundle --platform=node --target=node20 --format=esm --outfile=lib/index.js --banner:js=\"import { createRequire } from 'module';const require = createRequire(import.meta.url);\"",
+      "typecheck": "tsc --noEmit",
+      "test": "vitest run",
+      "coverage": "vitest run --coverage",
      "format": "prettier --write .",
      "format-check": "prettier --check .",
      "prepare": "husky"
   },
   "dependencies": {
-      "@actions/core": "^1.11.1",
-      "@actions/exec": "^1.0.0",
-      "@actions/io": "^1.1.3",
-      "@actions/tool-cache": "2.0.2",
-      "@babel/preset-env": "^7.28.0",
-      "@babel/preset-typescript": "^7.27.1",
-      "@octokit/core": "^7.0.3",
-      "@octokit/plugin-retry": "^8.0.1",
-      "@types/minipass": "^3.3.5",
-      "husky": "^9.1.7",
-      "js-yaml": "4.1.0",
+      "@actions/core": "^3.0.0",
+      "@actions/exec": "^3.0.0",
+      "@actions/io": "^3.0.2",
+      "@actions/tool-cache": "4.0.0",
+      "@octokit/core": "^7.0.6",
+      "@octokit/plugin-retry": "^8.1.0",
+      "js-yaml": "4.1.1",
      "minimist": "^1.2.8"
   },
   "devDependencies": {
-      "@types/jest": "^30.0.0",
      "@types/js-yaml": "^4.0.9",
      "@types/minimist": "^1.2.5",
-      "@types/node": "^24.2.0",
-      "@vercel/ncc": "^0.38.3",
-      "jest": "^30.0.5",
-      "prettier": "^3.6.2",
-      "ts-jest": "^29.4.1",
-      "typescript": "5.9.2"
+      "@types/node": "^25.3.3",
+      "esbuild": "^0.27",
+      "husky": "^9.1.7",
+      "prettier": "^3.8.1",
+      "typescript": "5.9.3",
+      "vitest": "^4"
   }
 }
@@ -1,19 +1,19 @@
 import * as core from '@actions/core'
-import * as models from '../types/kubernetesTypes'
-import * as KubernetesConstants from '../types/kubernetesTypes'
-import {Kubectl, Resource} from '../types/kubectl'
+import * as models from '../types/kubernetesTypes.js'
+import * as KubernetesConstants from '../types/kubernetesTypes.js'
+import {Kubectl, Resource} from '../types/kubectl.js'
 import {
   getResources,
   updateManifestFiles
-} from '../utilities/manifestUpdateUtils'
+} from '../utilities/manifestUpdateUtils.js'
 import {
   annotateAndLabelResources,
   checkManifestStability,
   deployManifests
-} from '../strategyHelpers/deploymentHelper'
-import {DeploymentStrategy} from '../types/deploymentStrategy'
-import {parseTrafficSplitMethod} from '../types/trafficSplitMethod'
-import {ClusterType} from '../inputUtils'
+} from '../strategyHelpers/deploymentHelper.js'
+import {DeploymentStrategy} from '../types/deploymentStrategy.js'
+import {parseTrafficSplitMethod} from '../types/trafficSplitMethod.js'
+import {ClusterType} from '../inputUtils.js'
 export const ResourceTypeManagedCluster =
   'Microsoft.ContainerService/managedClusters'
 export const ResourceTypeFleet = 'Microsoft.ContainerService/fleets'
@@ -1,44 +1,44 @@
 import * as core from '@actions/core'
-import * as canaryDeploymentHelper from '../strategyHelpers/canary/canaryHelper'
-import * as SMICanaryDeploymentHelper from '../strategyHelpers/canary/smiCanaryHelper'
-import * as PodCanaryHelper from '../strategyHelpers/canary/podCanaryHelper'
+import * as canaryDeploymentHelper from '../strategyHelpers/canary/canaryHelper.js'
+import * as SMICanaryDeploymentHelper from '../strategyHelpers/canary/smiCanaryHelper.js'
+import * as PodCanaryHelper from '../strategyHelpers/canary/podCanaryHelper.js'
 import {
   getResources,
   updateManifestFiles
-} from '../utilities/manifestUpdateUtils'
-import {annotateAndLabelResources} from '../strategyHelpers/deploymentHelper'
-import * as models from '../types/kubernetesTypes'
-import * as KubernetesManifestUtility from '../utilities/manifestStabilityUtils'
+} from '../utilities/manifestUpdateUtils.js'
+import {annotateAndLabelResources} from '../strategyHelpers/deploymentHelper.js'
+import * as models from '../types/kubernetesTypes.js'
+import * as KubernetesManifestUtility from '../utilities/manifestStabilityUtils.js'
 import {
   deleteGreenObjects,
   getManifestObjects,
   NONE_LABEL_VALUE
-} from '../strategyHelpers/blueGreen/blueGreenHelper'
+} from '../strategyHelpers/blueGreen/blueGreenHelper.js'

-import {BlueGreenManifests} from '../types/blueGreenTypes'
-import {DeployResult} from '../types/deployResult'
+import {BlueGreenManifests} from '../types/blueGreenTypes.js'
+import {DeployResult} from '../types/deployResult.js'

 import {
   promoteBlueGreenIngress,
   promoteBlueGreenService,
   promoteBlueGreenSMI
-} from '../strategyHelpers/blueGreen/promote'
+} from '../strategyHelpers/blueGreen/promote.js'

 import {
   routeBlueGreenService,
   routeBlueGreenIngressUnchanged,
   routeBlueGreenSMI
-} from '../strategyHelpers/blueGreen/route'
+} from '../strategyHelpers/blueGreen/route.js'

-import {cleanupSMI} from '../strategyHelpers/blueGreen/smiBlueGreenHelper'
-import {Kubectl, Resource} from '../types/kubectl'
-import {DeploymentStrategy} from '../types/deploymentStrategy'
+import {cleanupSMI} from '../strategyHelpers/blueGreen/smiBlueGreenHelper.js'
+import {Kubectl, Resource} from '../types/kubectl.js'
+import {DeploymentStrategy} from '../types/deploymentStrategy.js'
 import {
   parseTrafficSplitMethod,
   TrafficSplitMethod
-} from '../types/trafficSplitMethod'
-import {parseRouteStrategy, RouteStrategy} from '../types/routeStrategy'
-import {ClusterType} from '../inputUtils'
+} from '../types/trafficSplitMethod.js'
+import {parseRouteStrategy, RouteStrategy} from '../types/routeStrategy.js'
+import {ClusterType} from '../inputUtils.js'

 export async function promote(
   kubectl: Kubectl,
@@ -1,20 +1,20 @@
 import * as core from '@actions/core'
-import * as canaryDeploymentHelper from '../strategyHelpers/canary/canaryHelper'
-import * as SMICanaryDeploymentHelper from '../strategyHelpers/canary/smiCanaryHelper'
-import {Kubectl} from '../types/kubectl'
-import {BlueGreenManifests} from '../types/blueGreenTypes'
+import * as canaryDeploymentHelper from '../strategyHelpers/canary/canaryHelper.js'
+import * as SMICanaryDeploymentHelper from '../strategyHelpers/canary/smiCanaryHelper.js'
+import {Kubectl} from '../types/kubectl.js'
+import {BlueGreenManifests} from '../types/blueGreenTypes.js'
 import {
   rejectBlueGreenIngress,
   rejectBlueGreenService,
   rejectBlueGreenSMI
-} from '../strategyHelpers/blueGreen/reject'
-import {getManifestObjects} from '../strategyHelpers/blueGreen/blueGreenHelper'
-import {DeploymentStrategy} from '../types/deploymentStrategy'
+} from '../strategyHelpers/blueGreen/reject.js'
+import {getManifestObjects} from '../strategyHelpers/blueGreen/blueGreenHelper.js'
+import {DeploymentStrategy} from '../types/deploymentStrategy.js'
 import {
   parseTrafficSplitMethod,
   TrafficSplitMethod
-} from '../types/trafficSplitMethod'
-import {parseRouteStrategy, RouteStrategy} from '../types/routeStrategy'
+} from '../types/trafficSplitMethod.js'
+import {parseRouteStrategy, RouteStrategy} from '../types/routeStrategy.js'

 export async function reject(
   kubectl: Kubectl,
@@ -1,5 +1,8 @@
-import {parseResourceTypeInput} from './inputUtils'
-import {ResourceTypeFleet, ResourceTypeManagedCluster} from './actions/deploy'
+import {parseResourceTypeInput} from './inputUtils.js'
+import {
+   ResourceTypeFleet,
+   ResourceTypeManagedCluster
+} from './actions/deploy.js'

 describe('InputUtils', () => {
   describe('parseResourceTypeInput', () => {
@@ -1,6 +1,9 @@
 import * as core from '@actions/core'
-import {parseAnnotations} from './types/annotations'
-import {ResourceTypeFleet, ResourceTypeManagedCluster} from './actions/deploy'
+import {parseAnnotations} from './types/annotations.js'
+import {
+   ResourceTypeFleet,
+   ResourceTypeManagedCluster
+} from './actions/deploy.js'

 export const inputAnnotations = parseAnnotations(
   core.getInput('annotations', {required: false})
@@ -1,19 +1,19 @@
 import * as core from '@actions/core'
-import {getKubectlPath, Kubectl} from './types/kubectl'
+import {getKubectlPath, Kubectl} from './types/kubectl.js'
 import {
   deploy,
   ResourceTypeFleet,
   ResourceTypeManagedCluster
-} from './actions/deploy'
-import {ClusterType} from './inputUtils'
-import {promote} from './actions/promote'
-import {reject} from './actions/reject'
-import {Action, parseAction} from './types/action'
-import {parseDeploymentStrategy} from './types/deploymentStrategy'
-import {getFilesFromDirectoriesAndURLs} from './utilities/fileUtils'
-import {PrivateKubectl} from './types/privatekubectl'
-import {parseResourceTypeInput} from './inputUtils'
-import {parseDuration} from './utilities/durationUtils'
+} from './actions/deploy.js'
+import {ClusterType} from './inputUtils.js'
+import {promote} from './actions/promote.js'
+import {reject} from './actions/reject.js'
+import {Action, parseAction} from './types/action.js'
+import {parseDeploymentStrategy} from './types/deploymentStrategy.js'
+import {getFilesFromDirectoriesAndURLs} from './utilities/fileUtils.js'
+import {PrivateKubectl} from './types/privatekubectl.js'
+import {parseResourceTypeInput} from './inputUtils.js'
+import {parseDuration} from './utilities/durationUtils.js'

 export async function run() {
   // verify kubeconfig is set
@@ -1,3 +1,5 @@
+import {vi} from 'vitest'
+import type {MockInstance} from 'vitest'
 import {
   deployWithLabel,
   deleteGreenObjects,
@@ -8,16 +10,16 @@ import {
   getNewBlueGreenObject,
   GREEN_LABEL_VALUE,
   isServiceRouted
-} from './blueGreenHelper'
-import {BlueGreenDeployment} from '../../types/blueGreenTypes'
-import * as bgHelper from './blueGreenHelper'
-import {Kubectl} from '../../types/kubectl'
-import * as fileHelper from '../../utilities/fileUtils'
-import {K8sObject} from '../../types/k8sObject'
-import * as manifestUpdateUtils from '../../utilities/manifestUpdateUtils'
+} from './blueGreenHelper.js'
+import {BlueGreenDeployment} from '../../types/blueGreenTypes.js'
+import * as bgHelper from './blueGreenHelper.js'
+import {Kubectl} from '../../types/kubectl.js'
+import * as fileHelper from '../../utilities/fileUtils.js'
+import {K8sObject} from '../../types/k8sObject.js'
+import * as manifestUpdateUtils from '../../utilities/manifestUpdateUtils.js'
 import {ExecOutput} from '@actions/exec'

-jest.mock('../../types/kubectl')
+vi.mock('../../types/kubectl')

 const kubectl = new Kubectl('')
 const TEST_TIMEOUT = '60s'
@@ -37,17 +39,17 @@ const MOCK_EXEC_OUTPUT = {
 describe('bluegreenhelper functions', () => {
   let testObjects
   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
+      vi.restoreAllMocks()
+      vi.mocked(Kubectl).mockClear()
      testObjects = getManifestObjects(['test/unit/manifests/test-ingress.yml'])

-      jest
-         .spyOn(fileHelper, 'writeObjectsToFile')
-         .mockImplementationOnce(() => [''])
+      vi.spyOn(fileHelper, 'writeObjectsToFile').mockImplementationOnce(() => [
+         ''
+      ])
   })

   test('correctly deletes services and workloads according to label', async () => {
-      jest.spyOn(bgHelper, 'deleteObjects').mockReturnValue({} as Promise<void>)
+      vi.spyOn(bgHelper, 'deleteObjects').mockReturnValue({} as Promise<void>)

      const value = await deleteGreenObjects(
         kubectl,
@@ -65,21 +67,16 @@ describe('bluegreenhelper functions', () => {
   })

   test('handles timeout when deleting objects', async () => {
-      // Mock deleteObjects to prevent actual execution
-      const deleteSpy = jest
-         .spyOn(kubectl, 'delete')
-         .mockResolvedValue(MOCK_EXEC_OUTPUT)
+      const deleteMock = vi.fn().mockResolvedValue(MOCK_EXEC_OUTPUT)
+      kubectl.delete = deleteMock

-      await bgHelper.deleteObjects(
-         kubectl,
-         EXPECTED_GREEN_OBJECTS,
-         TEST_TIMEOUT
-      )
+      const deleteList = EXPECTED_GREEN_OBJECTS

-      // Verify kubectl.delete is called with timeout for each object in deleteList
-      expect(deleteSpy).toHaveBeenCalledTimes(EXPECTED_GREEN_OBJECTS.length)
-      EXPECTED_GREEN_OBJECTS.forEach(({name, kind}) => {
-         expect(deleteSpy).toHaveBeenCalledWith(
+      await bgHelper.deleteObjects(kubectl, deleteList, TEST_TIMEOUT)
+
+      expect(deleteMock).toHaveBeenCalledTimes(deleteList.length)
+      deleteList.forEach(({name, kind}) => {
+         expect(deleteMock).toHaveBeenCalledWith(
            [kind, name],
            undefined,
            TEST_TIMEOUT
@@ -135,7 +132,7 @@ describe('bluegreenhelper functions', () => {
   })

   test('correctly makes labeled workloads', async () => {
-      const kubectlApplySpy = jest.spyOn(kubectl, 'apply').mockResolvedValue({
+      const kubectlApplySpy = vi.spyOn(kubectl, 'apply').mockResolvedValue({
         stdout: 'deployment.apps/nginx-deployment created',
         stderr: '',
         exitCode: 0
@@ -179,9 +176,9 @@ describe('bluegreenhelper functions', () => {
         exitCode: 0
      }

-      jest
-         .spyOn(kubectl, 'getResource')
-         .mockImplementation(() => Promise.resolve(mockExecOutput))
+      vi.spyOn(kubectl, 'getResource').mockImplementation(() =>
+         Promise.resolve(mockExecOutput)
+      )
      const fetched = await fetchResource(
         kubectl,
         'nginx-deployment',
@@ -209,12 +206,12 @@ describe('bluegreenhelper functions', () => {
      ]

      for (const testCase of errorTestCases) {
-         const spy = jest.spyOn(kubectl, 'getResource')
+         const spy = vi.spyOn(kubectl, 'getResource')

         if (testCase.mockOutput) {
            spy.mockImplementation(() => Promise.resolve(testCase.mockOutput))
         } else {
-            spy.mockImplementation()
+            spy.mockResolvedValue(null)
         }

         const fetched = await fetchResource(
@@ -235,12 +232,13 @@ describe('bluegreenhelper functions', () => {
         stderr: ''
      } as ExecOutput

-      jest.spyOn(kubectl, 'getResource').mockResolvedValue(mockExecOutput)
-      jest
-         .spyOn(manifestUpdateUtils, 'UnsetClusterSpecificDetails')
-         .mockImplementation(() => {
-            throw new Error('test error')
-         })
+      vi.spyOn(kubectl, 'getResource').mockResolvedValue(mockExecOutput)
+      vi.spyOn(
+         manifestUpdateUtils,
+         'UnsetClusterSpecificDetails'
+      ).mockImplementation(() => {
+         throw new Error('test error')
+      })

      expect(
         await fetchResource(kubectl, 'nginx-deployment', 'Deployment')
@@ -267,7 +265,7 @@ describe('bluegreenhelper functions', () => {

   describe('deployObjects', () => {
      let mockObjects: any[]
-      let kubectlApplySpy: jest.SpyInstance
+      let kubectlApplySpy: MockInstance

      const mockSuccessResult: ExecOutput = {
         stdout: 'deployment.apps/nginx-deployment created',
@@ -285,11 +283,11 @@ describe('bluegreenhelper functions', () => {
         // //@ts-ignore
         // Kubectl.mockClear()
         mockObjects = [testObjects.deploymentEntityList[0]]
-         kubectlApplySpy = jest.spyOn(kubectl, 'apply')
+         kubectlApplySpy = vi.spyOn(kubectl, 'apply')
      })

      afterEach(() => {
-         jest.clearAllMocks()
+         vi.clearAllMocks()
      })

      it('should return execution result and manifest files when kubectl apply succeeds', async () => {
@@ -2,27 +2,27 @@ import * as core from '@actions/core'
 import * as fs from 'fs'
 import * as yaml from 'js-yaml'

-import {DeployResult} from '../../types/deployResult'
-import {K8sObject, K8sDeleteObject} from '../../types/k8sObject'
-import {Kubectl} from '../../types/kubectl'
+import {DeployResult} from '../../types/deployResult.js'
+import {K8sObject, K8sDeleteObject} from '../../types/k8sObject.js'
+import {Kubectl} from '../../types/kubectl.js'
 import {
   isDeploymentEntity,
   isIngressEntity,
   isServiceEntity,
   KubernetesWorkload
-} from '../../types/kubernetesTypes'
+} from '../../types/kubernetesTypes.js'
 import {
   BlueGreenDeployment,
   BlueGreenManifests
-} from '../../types/blueGreenTypes'
-import * as fileHelper from '../../utilities/fileUtils'
-import {updateSpecLabels} from '../../utilities/manifestSpecLabelUtils'
-import {checkForErrors} from '../../utilities/kubectlUtils'
+} from '../../types/blueGreenTypes.js'
+import * as fileHelper from '../../utilities/fileUtils.js'
+import {updateSpecLabels} from '../../utilities/manifestSpecLabelUtils.js'
+import {checkForErrors} from '../../utilities/kubectlUtils.js'
 import {
   UnsetClusterSpecificDetails,
   updateObjectLabels,
   updateSelectorLabels
-} from '../../utilities/manifestUpdateUtils'
+} from '../../utilities/manifestUpdateUtils.js'

 export const GREEN_LABEL_VALUE = 'green'
 export const NONE_LABEL_VALUE = 'None'
@@ -1,21 +1,23 @@
-import {BlueGreenDeployment} from '../../types/blueGreenTypes'
+import {vi} from 'vitest'
+import type {MockInstance} from 'vitest'
+import {BlueGreenDeployment} from '../../types/blueGreenTypes.js'
 import {
   deployBlueGreen,
   deployBlueGreenIngress,
   deployBlueGreenService,
   deployBlueGreenSMI
-} from './deploy'
-import * as routeTester from './route'
-import {Kubectl} from '../../types/kubectl'
-import {RouteStrategy} from '../../types/routeStrategy'
-import * as TSutils from '../../utilities/trafficSplitUtils'
-import * as bgHelper from './blueGreenHelper'
-import * as smiHelper from './smiBlueGreenHelper'
+} from './deploy.js'
+import * as routeTester from './route.js'
+import {Kubectl} from '../../types/kubectl.js'
+import {RouteStrategy} from '../../types/routeStrategy.js'
+import * as TSutils from '../../utilities/trafficSplitUtils.js'
+import * as bgHelper from './blueGreenHelper.js'
+import * as smiHelper from './smiBlueGreenHelper.js'
 import {ExecOutput} from '@actions/exec'

 const ingressFilepath = ['test/unit/manifests/test-ingress-new.yml']

-jest.mock('../../types/kubectl')
+vi.mock('../../types/kubectl')

 // Shared variables and mock objects used across all test suites
 const mockDeployResult = {
@@ -30,7 +32,7 @@ const mockBgDeployment: BlueGreenDeployment = {

 describe('deploy tests', () => {
   let kubectl: Kubectl
-   let kubectlApplySpy: jest.SpyInstance
+   let kubectlApplySpy: MockInstance

   const mockSuccessResult: ExecOutput = {
      stdout: 'deployment.apps/nginx-deployment created',
@@ -45,21 +47,20 @@ describe('deploy tests', () => {
   }

   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
+      vi.mocked(Kubectl).mockClear()
      kubectl = new Kubectl('')
-      kubectlApplySpy = jest.spyOn(kubectl, 'apply')
+      kubectlApplySpy = vi.spyOn(kubectl, 'apply')
   })

   test('correctly determines deploy type and acts accordingly', async () => {
      kubectlApplySpy.mockResolvedValue(mockSuccessResult)

-      jest
-         .spyOn(routeTester, 'routeBlueGreenForDeploy')
-         .mockImplementation(() => Promise.resolve(mockBgDeployment))
-      jest
-         .spyOn(TSutils, 'getTrafficSplitAPIVersion')
-         .mockImplementation(() => Promise.resolve('v1alpha3'))
+      vi.spyOn(routeTester, 'routeBlueGreenForDeploy').mockImplementation(() =>
+         Promise.resolve(mockBgDeployment)
+      )
+      vi.spyOn(TSutils, 'getTrafficSplitAPIVersion').mockImplementation(() =>
+         Promise.resolve('v1alpha3')
+      )

      const ingressResult = await deployBlueGreen(
         kubectl,
@@ -112,12 +113,12 @@ describe('deploy tests', () => {
         fn: () =>
            deployBlueGreen(kubectl, ingressFilepath, RouteStrategy.INGRESS),
         setup: () => {
-            jest
-               .spyOn(routeTester, 'routeBlueGreenForDeploy')
-               .mockImplementation(() => Promise.resolve(mockBgDeployment))
-            jest
-               .spyOn(TSutils, 'getTrafficSplitAPIVersion')
-               .mockImplementation(() => Promise.resolve('v1alpha3'))
+            vi.spyOn(routeTester, 'routeBlueGreenForDeploy').mockImplementation(
+               () => Promise.resolve(mockBgDeployment)
+            )
+            vi.spyOn(TSutils, 'getTrafficSplitAPIVersion').mockImplementation(
+               () => Promise.resolve('v1alpha3')
+            )
         }
      },
      {
@@ -125,24 +126,24 @@ describe('deploy tests', () => {
         fn: () =>
            deployBlueGreen(kubectl, ingressFilepath, RouteStrategy.SERVICE),
         setup: () => {
-            jest
-               .spyOn(routeTester, 'routeBlueGreenForDeploy')
-               .mockImplementation(() => Promise.resolve(mockBgDeployment))
-            jest
-               .spyOn(TSutils, 'getTrafficSplitAPIVersion')
-               .mockImplementation(() => Promise.resolve('v1alpha3'))
+            vi.spyOn(routeTester, 'routeBlueGreenForDeploy').mockImplementation(
+               () => Promise.resolve(mockBgDeployment)
+            )
+            vi.spyOn(TSutils, 'getTrafficSplitAPIVersion').mockImplementation(
+               () => Promise.resolve('v1alpha3')
+            )
         }
      },
      {
         name: 'should throw error when kubectl apply fails during blue/green deployment with SMI strategy',
         fn: () => deployBlueGreen(kubectl, ingressFilepath, RouteStrategy.SMI),
         setup: () => {
-            jest
-               .spyOn(routeTester, 'routeBlueGreenForDeploy')
-               .mockImplementation(() => Promise.resolve(mockBgDeployment))
-            jest
-               .spyOn(TSutils, 'getTrafficSplitAPIVersion')
-               .mockImplementation(() => Promise.resolve('v1alpha3'))
+            vi.spyOn(routeTester, 'routeBlueGreenForDeploy').mockImplementation(
+               () => Promise.resolve(mockBgDeployment)
+            )
+            vi.spyOn(TSutils, 'getTrafficSplitAPIVersion').mockImplementation(
+               () => Promise.resolve('v1alpha3')
+            )
         }
      },
      {
@@ -181,8 +182,7 @@ describe('deploy timeout tests', () => {
   let kubectl: Kubectl

   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
+      vi.mocked(Kubectl).mockClear()
      kubectl = new Kubectl('')
   })

@@ -190,16 +190,16 @@ describe('deploy timeout tests', () => {
      const timeout = '300s'

      // Mock the helper functions that are actually called
-      const deployWithLabelSpy = jest
+      const deployWithLabelSpy = vi
         .spyOn(bgHelper, 'deployWithLabel')
         .mockResolvedValue(mockBgDeployment)
-      const deployObjectsSpy = jest
+      const deployObjectsSpy = vi
         .spyOn(bgHelper, 'deployObjects')
         .mockResolvedValue(mockDeployResult)
-      const setupSMISpy = jest
+      const setupSMISpy = vi
         .spyOn(smiHelper, 'setupSMI')
         .mockResolvedValue(mockBgDeployment)
-      const routeSpy = jest
+      const routeSpy = vi
         .spyOn(routeTester, 'routeBlueGreenForDeploy')
         .mockResolvedValue(mockBgDeployment)

@@ -258,10 +258,10 @@ describe('deploy timeout tests', () => {
      const timeout = '240s'

      // Mock the dependencies
-      const deployWithLabelSpy = jest
+      const deployWithLabelSpy = vi
         .spyOn(bgHelper, 'deployWithLabel')
         .mockResolvedValue(mockBgDeployment)
-      const deployObjectsSpy = jest
+      const deployObjectsSpy = vi
         .spyOn(bgHelper, 'deployObjects')
         .mockResolvedValue(mockDeployResult)

@@ -290,10 +290,10 @@ describe('deploy timeout tests', () => {
      const timeout = '180s'

      // Mock the dependencies
-      const deployWithLabelSpy = jest
+      const deployWithLabelSpy = vi
         .spyOn(bgHelper, 'deployWithLabel')
         .mockResolvedValue(mockBgDeployment)
-      const deployObjectsSpy = jest
+      const deployObjectsSpy = vi
         .spyOn(bgHelper, 'deployObjects')
         .mockResolvedValue(mockDeployResult)

@@ -322,13 +322,13 @@ describe('deploy timeout tests', () => {
      const timeout = '360s'

      // Mock the dependencies
-      const setupSMISpy = jest
+      const setupSMISpy = vi
         .spyOn(smiHelper, 'setupSMI')
         .mockResolvedValue(mockBgDeployment)
-      const deployObjectsSpy = jest
+      const deployObjectsSpy = vi
         .spyOn(bgHelper, 'deployObjects')
         .mockResolvedValue(mockDeployResult)
-      const deployWithLabelSpy = jest
+      const deployWithLabelSpy = vi
         .spyOn(bgHelper, 'deployWithLabel')
         .mockResolvedValue(mockBgDeployment)

@@ -354,10 +354,10 @@ describe('deploy timeout tests', () => {
   })

   test('deploy functions without timeout should pass undefined', async () => {
-      const deployWithLabelSpy = jest
+      const deployWithLabelSpy = vi
         .spyOn(bgHelper, 'deployWithLabel')
         .mockResolvedValue(mockBgDeployment)
-      const deployObjectsSpy = jest
+      const deployObjectsSpy = vi
         .spyOn(bgHelper, 'deployObjects')
         .mockResolvedValue(mockDeployResult)

@@ -1,23 +1,23 @@
 import * as core from '@actions/core'

-import {Kubectl} from '../../types/kubectl'
+import {Kubectl} from '../../types/kubectl.js'
 import {
   BlueGreenDeployment,
   BlueGreenManifests
-} from '../../types/blueGreenTypes'
+} from '../../types/blueGreenTypes.js'

-import {RouteStrategy} from '../../types/routeStrategy'
+import {RouteStrategy} from '../../types/routeStrategy.js'

 import {
   deployWithLabel,
   getManifestObjects,
   GREEN_LABEL_VALUE,
   deployObjects
-} from './blueGreenHelper'
-import {setupSMI} from './smiBlueGreenHelper'
+} from './blueGreenHelper.js'
+import {setupSMI} from './smiBlueGreenHelper.js'

-import {routeBlueGreenForDeploy} from './route'
-import {DeployResult} from '../../types/deployResult'
+import {routeBlueGreenForDeploy} from './route.js'
+import {DeployResult} from '../../types/deployResult.js'

 export async function deployBlueGreen(
   kubectl: Kubectl,
@@ -1,27 +1,27 @@
-import {getManifestObjects, GREEN_LABEL_VALUE} from './blueGreenHelper'
-import * as bgHelper from './blueGreenHelper'
+import {vi} from 'vitest'
+import {getManifestObjects, GREEN_LABEL_VALUE} from './blueGreenHelper.js'
+import * as bgHelper from './blueGreenHelper.js'
 import {
   getUpdatedBlueGreenIngress,
   isIngressRouted,
   validateIngresses
-} from './ingressBlueGreenHelper'
-import {Kubectl} from '../../types/kubectl'
-import * as fileHelper from '../../utilities/fileUtils'
+} from './ingressBlueGreenHelper.js'
+import {Kubectl} from '../../types/kubectl.js'
+import * as fileHelper from '../../utilities/fileUtils.js'

 const betaFilepath = ['test/unit/manifests/test-ingress.yml']
 const ingressFilepath = ['test/unit/manifests/test-ingress-new.yml']
 const kubectl = new Kubectl('')
-jest.mock('../../types/kubectl')
+vi.mock('../../types/kubectl')

 describe('ingress blue green helpers', () => {
   let testObjects
   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
+      vi.mocked(Kubectl).mockClear()
      testObjects = getManifestObjects(ingressFilepath)
-      jest
-         .spyOn(fileHelper, 'writeObjectsToFile')
-         .mockImplementationOnce(() => [''])
+      vi.spyOn(fileHelper, 'writeObjectsToFile').mockImplementationOnce(() => [
+         ''
+      ])
   })

   test('it should correctly classify ingresses', () => {
@@ -72,7 +72,7 @@ describe('ingress blue green helpers', () => {

   test('it should validate ingresses', async () => {
      // what if nothing gets returned from fetchResource?
-      jest.spyOn(bgHelper, 'fetchResource').mockImplementation()
+      vi.spyOn(bgHelper, 'fetchResource').mockResolvedValue(null)
      let validResponse = await validateIngresses(
         kubectl,
         testObjects.ingressEntityList,
@@ -89,9 +89,9 @@ describe('ingress blue green helpers', () => {
      const mockLabels = new Map<string, string>()
      mockLabels[bgHelper.BLUE_GREEN_VERSION_LABEL] = GREEN_LABEL_VALUE
      mockIngress.metadata.labels = mockLabels
-      jest
-         .spyOn(bgHelper, 'fetchResource')
-         .mockImplementation(() => Promise.resolve(mockIngress))
+      vi.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
+         Promise.resolve(mockIngress)
+      )
      validResponse = await validateIngresses(
         kubectl,
         testObjects.ingressEntityList,
@@ -1,12 +1,12 @@
 import * as core from '@actions/core'
-import {K8sIngress} from '../../types/k8sObject'
+import {K8sIngress} from '../../types/k8sObject.js'
 import {
   addBlueGreenLabelsAndAnnotations,
   BLUE_GREEN_VERSION_LABEL,
   GREEN_LABEL_VALUE,
   fetchResource
-} from './blueGreenHelper'
-import {Kubectl} from '../../types/kubectl'
+} from './blueGreenHelper.js'
+import {Kubectl} from '../../types/kubectl.js'

 const BACKEND = 'backend'

@@ -1,20 +1,22 @@
-import {getManifestObjects} from './blueGreenHelper'
+import {vi} from 'vitest'
+import type {MockInstance} from 'vitest'
+import {getManifestObjects} from './blueGreenHelper.js'
 import {
   promoteBlueGreenIngress,
   promoteBlueGreenService,
   promoteBlueGreenSMI
-} from './promote'
-import {TrafficSplitObject} from '../../types/k8sObject'
-import * as servicesTester from './serviceBlueGreenHelper'
-import {Kubectl} from '../../types/kubectl'
-import {MAX_VAL, MIN_VAL, TRAFFIC_SPLIT_OBJECT} from './smiBlueGreenHelper'
-import * as smiTester from './smiBlueGreenHelper'
-import * as bgHelper from './blueGreenHelper'
+} from './promote.js'
+import {TrafficSplitObject} from '../../types/k8sObject.js'
+import * as servicesTester from './serviceBlueGreenHelper.js'
+import {Kubectl} from '../../types/kubectl.js'
+import {MAX_VAL, MIN_VAL, TRAFFIC_SPLIT_OBJECT} from './smiBlueGreenHelper.js'
+import * as smiTester from './smiBlueGreenHelper.js'
+import * as bgHelper from './blueGreenHelper.js'
 import {ExecOutput} from '@actions/exec'

 const ingressFilepath = ['test/unit/manifests/test-ingress-new.yml']

-jest.mock('../../types/kubectl')
+vi.mock('../../types/kubectl')

 // Shared variables used across all test suites
 let testObjects: any
@@ -42,13 +44,12 @@ const mockBgDeployment = {
 }

 describe('promote tests', () => {
-   let kubectlApplySpy: jest.SpyInstance
+   let kubectlApplySpy: MockInstance

   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
+      vi.mocked(Kubectl).mockClear()
      testObjects = getManifestObjects(ingressFilepath)
-      kubectlApplySpy = jest.spyOn(kubectl, 'apply')
+      kubectlApplySpy = vi.spyOn(kubectl, 'apply')
   })

   test('promote blue/green ingress', async () => {
@@ -57,7 +58,7 @@ describe('promote tests', () => {
      const mockLabels = new Map<string, string>()
      mockLabels[bgHelper.BLUE_GREEN_VERSION_LABEL] = bgHelper.GREEN_LABEL_VALUE

-      jest.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
+      vi.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
         Promise.resolve({
            kind: 'Ingress',
            spec: {},
@@ -82,7 +83,7 @@ describe('promote tests', () => {
   test('fail to promote invalid blue/green ingress', async () => {
      const mockLabels = new Map<string, string>()
      mockLabels[bgHelper.BLUE_GREEN_VERSION_LABEL] = bgHelper.NONE_LABEL_VALUE
-      jest.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
+      vi.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
         Promise.resolve({
            kind: 'Ingress',
            spec: {},
@@ -100,7 +101,7 @@ describe('promote tests', () => {

      const mockLabels = new Map<string, string>()
      mockLabels[bgHelper.BLUE_GREEN_VERSION_LABEL] = bgHelper.GREEN_LABEL_VALUE
-      jest.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
+      vi.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
         Promise.resolve({
            kind: 'Service',
            spec: {selector: mockLabels},
@@ -120,16 +121,16 @@ describe('promote tests', () => {
   test('fail to promote invalid blue/green service', async () => {
      const mockLabels = new Map<string, string>()
      mockLabels[bgHelper.BLUE_GREEN_VERSION_LABEL] = bgHelper.NONE_LABEL_VALUE
-      jest.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
+      vi.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
         Promise.resolve({
            kind: 'Service',
            spec: {},
            metadata: {labels: mockLabels, name: 'nginx-ingress-green'}
         })
      )
-      jest
-         .spyOn(servicesTester, 'validateServicesState')
-         .mockImplementationOnce(() => Promise.resolve(false))
+      vi.spyOn(servicesTester, 'validateServicesState').mockImplementationOnce(
+         () => Promise.resolve(false)
+      )

      await expect(
         promoteBlueGreenService(kubectl, testObjects)
@@ -164,9 +165,9 @@ describe('promote tests', () => {
            ]
         }
      }
-      jest
-         .spyOn(bgHelper, 'fetchResource')
-         .mockImplementation(() => Promise.resolve(mockTsObject))
+      vi.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
+         Promise.resolve(mockTsObject)
+      )

      const deployResult = await promoteBlueGreenSMI(kubectl, testObjects)

@@ -182,11 +183,11 @@ describe('promote tests', () => {
   test('promote blue/green SMI with bad trafficsplit', async () => {
      const mockLabels = new Map<string, string>()
      mockLabels[bgHelper.BLUE_GREEN_VERSION_LABEL] = bgHelper.NONE_LABEL_VALUE
-      jest
-         .spyOn(smiTester, 'validateTrafficSplitsState')
-         .mockImplementation(() => Promise.resolve(false))
+      vi.spyOn(smiTester, 'validateTrafficSplitsState').mockImplementation(() =>
+         Promise.resolve(false)
+      )

-      expect(promoteBlueGreenSMI(kubectl, testObjects)).rejects.toThrow()
+      await expect(promoteBlueGreenSMI(kubectl, testObjects)).rejects.toThrow()
   })

   // Consolidated error tests
@@ -198,7 +199,7 @@ describe('promote tests', () => {
            const mockLabels = new Map<string, string>()
            mockLabels[bgHelper.BLUE_GREEN_VERSION_LABEL] =
               bgHelper.GREEN_LABEL_VALUE
-            jest.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
+            vi.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
               Promise.resolve({
                  kind: 'Ingress',
                  spec: {},
@@ -214,16 +215,16 @@ describe('promote tests', () => {
            const mockLabels = new Map<string, string>()
            mockLabels[bgHelper.BLUE_GREEN_VERSION_LABEL] =
               bgHelper.GREEN_LABEL_VALUE
-            jest.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
+            vi.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
               Promise.resolve({
                  kind: 'Service',
                  spec: {selector: mockLabels},
                  metadata: {labels: mockLabels, name: 'nginx-service-green'}
               })
            )
-            jest
-               .spyOn(servicesTester, 'validateServicesState')
-               .mockResolvedValue(true)
+            vi.spyOn(servicesTester, 'validateServicesState').mockResolvedValue(
+               true
+            )
         }
      },
      {
@@ -246,12 +247,10 @@ describe('promote tests', () => {
                  ]
               }
            }
-            jest
-               .spyOn(bgHelper, 'fetchResource')
-               .mockResolvedValue(mockTsObject)
-            jest
-               .spyOn(smiTester, 'validateTrafficSplitsState')
-               .mockResolvedValue(true)
+            vi.spyOn(bgHelper, 'fetchResource').mockResolvedValue(mockTsObject)
+            vi.spyOn(smiTester, 'validateTrafficSplitsState').mockResolvedValue(
+               true
+            )
         }
      }
   ])('$name', async ({fn, setup}) => {
@@ -279,15 +278,12 @@ describe('promote tests', () => {
 // Timeout tests
 describe('promote timeout tests', () => {
   beforeEach(() => {
-      // @ts-ignore
-      Kubectl.mockClear()
+      vi.mocked(Kubectl).mockClear()
      testObjects = getManifestObjects(ingressFilepath)
   })

   const mockDeployWithLabel = () =>
-      jest
-         .spyOn(bgHelper, 'deployWithLabel')
-         .mockResolvedValue(mockBgDeployment)
+      vi.spyOn(bgHelper, 'deployWithLabel').mockResolvedValue(mockBgDeployment)

   const setupFetchResource = (
      kind: string,
@@ -297,7 +293,7 @@ describe('promote timeout tests', () => {
      const mockLabels = new Map<string, string>()
      mockLabels[bgHelper.BLUE_GREEN_VERSION_LABEL] = labelValue

-      jest.spyOn(bgHelper, 'fetchResource').mockResolvedValue({
+      vi.spyOn(bgHelper, 'fetchResource').mockResolvedValue({
         kind,
         spec: {},
         metadata: {labels: mockLabels, name}
@@ -330,9 +326,9 @@ describe('promote timeout tests', () => {
               'nginx-service-green',
               bgHelper.GREEN_LABEL_VALUE
            )
-            jest
-               .spyOn(servicesTester, 'validateServicesState')
-               .mockResolvedValue(true)
+            vi.spyOn(servicesTester, 'validateServicesState').mockResolvedValue(
+               true
+            )
         }
      },
      {
@@ -359,12 +355,10 @@ describe('promote timeout tests', () => {
               }
            }

-            jest
-               .spyOn(bgHelper, 'fetchResource')
-               .mockResolvedValue(mockTsObject)
-            jest
-               .spyOn(smiTester, 'validateTrafficSplitsState')
-               .mockResolvedValue(true)
+            vi.spyOn(bgHelper, 'fetchResource').mockResolvedValue(mockTsObject)
+            vi.spyOn(smiTester, 'validateTrafficSplitsState').mockResolvedValue(
+               true
+            )
         }
      }
   ])('$name', async ({fn, timeout, setup}) => {
@@ -1,13 +1,13 @@
 import * as core from '@actions/core'

-import {Kubectl} from '../../types/kubectl'
+import {Kubectl} from '../../types/kubectl.js'

-import {BlueGreenDeployment} from '../../types/blueGreenTypes'
-import {deployWithLabel, NONE_LABEL_VALUE} from './blueGreenHelper'
+import {BlueGreenDeployment} from '../../types/blueGreenTypes.js'
+import {deployWithLabel, NONE_LABEL_VALUE} from './blueGreenHelper.js'

-import {validateIngresses} from './ingressBlueGreenHelper'
-import {validateServicesState} from './serviceBlueGreenHelper'
-import {validateTrafficSplitsState} from './smiBlueGreenHelper'
+import {validateIngresses} from './ingressBlueGreenHelper.js'
+import {validateServicesState} from './serviceBlueGreenHelper.js'
+import {validateTrafficSplitsState} from './smiBlueGreenHelper.js'

 export async function promoteBlueGreenIngress(
   kubectl: Kubectl,
@@ -1,21 +1,23 @@
-import {getManifestObjects} from './blueGreenHelper'
-import {Kubectl} from '../../types/kubectl'
+import {vi} from 'vitest'
+import type {MockInstance} from 'vitest'
+import {getManifestObjects} from './blueGreenHelper.js'
+import {Kubectl} from '../../types/kubectl.js'

-import * as TSutils from '../../utilities/trafficSplitUtils'
+import * as TSutils from '../../utilities/trafficSplitUtils.js'
 import {
   rejectBlueGreenIngress,
   rejectBlueGreenService,
   rejectBlueGreenSMI
-} from './reject'
-import * as bgHelper from './blueGreenHelper'
-import * as routeHelper from './route'
+} from './reject.js'
+import * as bgHelper from './blueGreenHelper.js'
+import * as routeHelper from './route.js'

 const ingressFilepath = ['test/unit/manifests/test-ingress-new.yml']
 const kubectl = new Kubectl('')
 const TEST_TIMEOUT_SHORT = '60s'
 const TEST_TIMEOUT_LONG = '120s'

-jest.mock('../../types/kubectl')
+vi.mock('../../types/kubectl')

 // Shared mock objects following DRY principle
 const mockSuccessResult = {
@@ -54,14 +56,13 @@ const mockDeleteResult = [

 describe('reject tests', () => {
   let testObjects: any
-   let kubectlApplySpy: jest.SpyInstance
+   let kubectlApplySpy: MockInstance

   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
-      jest.restoreAllMocks()
+      vi.mocked(Kubectl).mockClear()
+      vi.restoreAllMocks()
      testObjects = getManifestObjects(ingressFilepath)
-      kubectlApplySpy = jest.spyOn(kubectl, 'apply')
+      kubectlApplySpy = vi.spyOn(kubectl, 'apply')
   })

   test('reject blue/green ingress', async () => {
@@ -89,13 +90,13 @@ describe('reject tests', () => {

   test('reject blue/green ingress with timeout', async () => {
      // Mock routeBlueGreenIngressUnchanged and deleteGreenObjects
-      jest
-         .spyOn(routeHelper, 'routeBlueGreenIngressUnchanged')
-         .mockResolvedValue(mockBgDeployment)
+      vi.spyOn(routeHelper, 'routeBlueGreenIngressUnchanged').mockResolvedValue(
+         mockBgDeployment
+      )

-      jest
-         .spyOn(bgHelper, 'deleteGreenObjects')
-         .mockResolvedValue(mockDeleteResult)
+      vi.spyOn(bgHelper, 'deleteGreenObjects').mockResolvedValue(
+         mockDeleteResult
+      )

      const value = await rejectBlueGreenIngress(
         kubectl,
@@ -138,9 +139,9 @@ describe('reject tests', () => {

   test('reject blue/green service', async () => {
      kubectlApplySpy.mockResolvedValue(mockSuccessResult)
-      jest
-         .spyOn(bgHelper, 'deleteGreenObjects')
-         .mockResolvedValue(mockDeleteResult)
+      vi.spyOn(bgHelper, 'deleteGreenObjects').mockResolvedValue(
+         mockDeleteResult
+      )

      const value = await rejectBlueGreenService(
         kubectl,
@@ -163,7 +164,7 @@ describe('reject tests', () => {

   test('reject blue/green service with timeout', async () => {
      // Mock routeBlueGreenService and deleteGreenObjects
-      jest.spyOn(routeHelper, 'routeBlueGreenService').mockResolvedValue({
+      vi.spyOn(routeHelper, 'routeBlueGreenService').mockResolvedValue({
         deployResult: {
            execResult: {stdout: '', stderr: '', exitCode: 0},
            manifestFiles: []
@@ -180,11 +181,9 @@ describe('reject tests', () => {
         ]
      })

-      jest
-         .spyOn(bgHelper, 'deleteGreenObjects')
-         .mockResolvedValue([
-            {name: 'nginx-deployment-green', kind: 'Deployment'}
-         ])
+      vi.spyOn(bgHelper, 'deleteGreenObjects').mockResolvedValue([
+         {name: 'nginx-deployment-green', kind: 'Deployment'}
+      ])

      const value = await rejectBlueGreenService(
         kubectl,
@@ -213,9 +212,9 @@ describe('reject tests', () => {
      // Mock kubectl.apply to return successful result
      kubectlApplySpy.mockResolvedValue(mockSuccessResult)

-      jest
-         .spyOn(TSutils, 'getTrafficSplitAPIVersion')
-         .mockImplementation(() => Promise.resolve('v1alpha3'))
+      vi.spyOn(TSutils, 'getTrafficSplitAPIVersion').mockImplementation(() =>
+         Promise.resolve('v1alpha3')
+      )
      const rejectResult = await rejectBlueGreenSMI(kubectl, testObjects)
      expect(rejectResult.deleteResult).toHaveLength(2)
   })
@@ -226,27 +225,27 @@ describe('reject tests', () => {
         name: 'should throw error when kubectl apply fails during blue/green ingress rejection',
         fn: () => rejectBlueGreenIngress(kubectl, testObjects),
         setup: () => {
-            jest
-               .spyOn(bgHelper, 'deleteGreenObjects')
-               .mockResolvedValue(mockDeleteResult)
+            vi.spyOn(bgHelper, 'deleteGreenObjects').mockResolvedValue(
+               mockDeleteResult
+            )
         }
      },
      {
         name: 'should throw error when kubectl apply fails during blue/green service rejection',
         fn: () => rejectBlueGreenService(kubectl, testObjects),
         setup: () => {
-            jest
-               .spyOn(bgHelper, 'deleteGreenObjects')
-               .mockResolvedValue(mockDeleteResult)
+            vi.spyOn(bgHelper, 'deleteGreenObjects').mockResolvedValue(
+               mockDeleteResult
+            )
         }
      },
      {
         name: 'should throw error when kubectl apply fails during blue/green SMI rejection',
         fn: () => rejectBlueGreenSMI(kubectl, testObjects),
         setup: () => {
-            jest
-               .spyOn(TSutils, 'getTrafficSplitAPIVersion')
-               .mockImplementation(() => Promise.resolve('v1alpha3'))
+            vi.spyOn(TSutils, 'getTrafficSplitAPIVersion').mockImplementation(
+               () => Promise.resolve('v1alpha3')
+            )
         }
      }
   ])('$name', async ({fn, setup}) => {
@@ -1,14 +1,14 @@
-import {K8sDeleteObject} from '../../types/k8sObject'
-import {Kubectl} from '../../types/kubectl'
+import {K8sDeleteObject} from '../../types/k8sObject.js'
+import {Kubectl} from '../../types/kubectl.js'
 import {
   BlueGreenDeployment,
   BlueGreenManifests,
   BlueGreenRejectResult
-} from '../../types/blueGreenTypes'
-import {deleteGreenObjects, NONE_LABEL_VALUE} from './blueGreenHelper'
-import {routeBlueGreenSMI} from './route'
-import {cleanupSMI} from './smiBlueGreenHelper'
-import {routeBlueGreenIngressUnchanged, routeBlueGreenService} from './route'
+} from '../../types/blueGreenTypes.js'
+import {deleteGreenObjects, NONE_LABEL_VALUE} from './blueGreenHelper.js'
+import {routeBlueGreenSMI} from './route.js'
+import {cleanupSMI} from './smiBlueGreenHelper.js'
+import {routeBlueGreenIngressUnchanged, routeBlueGreenService} from './route.js'

 export async function rejectBlueGreenIngress(
   kubectl: Kubectl,
@@ -1,24 +1,28 @@
-import {K8sIngress, TrafficSplitObject} from '../../types/k8sObject'
-import {Kubectl} from '../../types/kubectl'
-import * as fileHelper from '../../utilities/fileUtils'
-import * as TSutils from '../../utilities/trafficSplitUtils'
-import {RouteStrategy} from '../../types/routeStrategy'
-import {BlueGreenManifests} from '../../types/blueGreenTypes'
+import {vi} from 'vitest'
+import type {MockInstance} from 'vitest'
+import {K8sIngress, TrafficSplitObject} from '../../types/k8sObject.js'
+import {Kubectl} from '../../types/kubectl.js'
+import * as fileHelper from '../../utilities/fileUtils.js'
+import * as TSutils from '../../utilities/trafficSplitUtils.js'
+import {RouteStrategy} from '../../types/routeStrategy.js'
+import {BlueGreenManifests} from '../../types/blueGreenTypes.js'

 import {
   BLUE_GREEN_VERSION_LABEL,
   getManifestObjects,
   GREEN_LABEL_VALUE
-} from './blueGreenHelper'
+} from './blueGreenHelper.js'
+import * as bgHelper from './blueGreenHelper.js'
+import * as smiHelper from './smiBlueGreenHelper.js'
 import {
   routeBlueGreenIngress,
   routeBlueGreenService,
   routeBlueGreenForDeploy,
   routeBlueGreenSMI,
   routeBlueGreenIngressUnchanged
-} from './route'
+} from './route.js'

-jest.mock('../../types/kubectl')
+vi.mock('../../types/kubectl')
 const ingressFilepath = ['test/unit/manifests/test-ingress-new.yml']
 const kc = new Kubectl('')

@@ -37,16 +41,15 @@ const mockFailureResult = {

 describe('route function tests', () => {
   let testObjects: BlueGreenManifests
-   let kubectlApplySpy: jest.SpyInstance
+   let kubectlApplySpy: MockInstance

   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
+      vi.mocked(Kubectl).mockClear()
      testObjects = getManifestObjects(ingressFilepath)
-      kubectlApplySpy = jest.spyOn(kc, 'apply')
-      jest
-         .spyOn(fileHelper, 'writeObjectsToFile')
-         .mockImplementationOnce(() => [''])
+      kubectlApplySpy = vi.spyOn(kc, 'apply')
+      vi.spyOn(fileHelper, 'writeObjectsToFile').mockImplementationOnce(() => [
+         ''
+      ])
   })

   test('correctly prepares blue/green ingresses for deployment', async () => {
@@ -96,9 +99,9 @@ describe('route function tests', () => {
   })

   test('correctly identifies route pattern and acts accordingly', async () => {
-      jest
-         .spyOn(TSutils, 'getTrafficSplitAPIVersion')
-         .mockImplementation(() => Promise.resolve('v1alpha3'))
+      vi.spyOn(TSutils, 'getTrafficSplitAPIVersion').mockImplementation(() =>
+         Promise.resolve('v1alpha3')
+      )

      const ingressResult = await routeBlueGreenForDeploy(
         kc,
@@ -164,9 +167,9 @@ describe('route function tests', () => {
               testObjects.serviceEntityList
            ),
         setup: () => {
-            jest
-               .spyOn(TSutils, 'getTrafficSplitAPIVersion')
-               .mockImplementation(() => Promise.resolve('v1alpha3'))
+            vi.spyOn(TSutils, 'getTrafficSplitAPIVersion').mockImplementation(
+               () => Promise.resolve('v1alpha3')
+            )
         }
      },
      {
@@ -194,24 +197,23 @@ describe('route timeout tests', () => {
   let testObjects: BlueGreenManifests

   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
+      vi.mocked(Kubectl).mockClear()
      testObjects = getManifestObjects(ingressFilepath)
-      jest
-         .spyOn(fileHelper, 'writeObjectsToFile')
-         .mockImplementationOnce(() => [''])
+      vi.spyOn(fileHelper, 'writeObjectsToFile').mockImplementationOnce(() => [
+         ''
+      ])
   })

   afterEach(() => {
-      jest.restoreAllMocks()
+      vi.restoreAllMocks()
   })

   test('routeBlueGreenService with timeout', async () => {
      const timeout = '240s'

      // Mock deployObjects to capture timeout parameter
-      const deployObjectsSpy = jest
-         .spyOn(require('./blueGreenHelper'), 'deployObjects')
+      const deployObjectsSpy = vi
+         .spyOn(bgHelper, 'deployObjects')
         .mockResolvedValue({
            execResult: mockSuccessResult,
            manifestFiles: []
@@ -237,23 +239,29 @@ describe('route timeout tests', () => {
   test('routeBlueGreenSMI with timeout', async () => {
      const timeout = '300s'

-      jest
-         .spyOn(TSutils, 'getTrafficSplitAPIVersion')
-         .mockImplementation(() => Promise.resolve('v1alpha3'))
+      vi.spyOn(TSutils, 'getTrafficSplitAPIVersion').mockImplementation(() =>
+         Promise.resolve('v1alpha3')
+      )

      // Mock deployObjects and createTrafficSplitObject to capture timeout parameter
-      const deployObjectsSpy = jest
-         .spyOn(require('./blueGreenHelper'), 'deployObjects')
+      const deployObjectsSpy = vi
+         .spyOn(bgHelper, 'deployObjects')
         .mockResolvedValue({
            execResult: mockSuccessResult,
            manifestFiles: []
         })

-      const createTrafficSplitSpy = jest
-         .spyOn(require('./smiBlueGreenHelper'), 'createTrafficSplitObject')
+      const createTrafficSplitSpy = vi
+         .spyOn(smiHelper, 'createTrafficSplitObject')
         .mockResolvedValue({
-            metadata: {name: 'nginx-service-trafficsplit'},
-            spec: {backends: []}
+            apiVersion: 'split.smi-spec.io/v1alpha3',
+            kind: 'TrafficSplit',
+            metadata: {
+               name: 'nginx-service-trafficsplit',
+               labels: new Map(),
+               annotations: new Map()
+            },
+            spec: {service: 'nginx-service', backends: []}
         })

      const value = await routeBlueGreenSMI(
@@ -284,8 +292,8 @@ describe('route timeout tests', () => {
      const timeout = '180s'

      // Mock deployObjects to capture timeout parameter
-      const deployObjectsSpy = jest
-         .spyOn(require('./blueGreenHelper'), 'deployObjects')
+      const deployObjectsSpy = vi
+         .spyOn(bgHelper, 'deployObjects')
         .mockResolvedValue({
            execResult: mockSuccessResult,
            manifestFiles: []
@@ -309,8 +317,8 @@ describe('route timeout tests', () => {
   })

   test('route functions without timeout should pass undefined', async () => {
-      const deployObjectsSpy = jest
-         .spyOn(require('./blueGreenHelper'), 'deployObjects')
+      const deployObjectsSpy = vi
+         .spyOn(bgHelper, 'deployObjects')
         .mockResolvedValue({
            execResult: mockSuccessResult,
            manifestFiles: []
@@ -1,26 +1,26 @@
-import {sleep} from '../../utilities/timeUtils'
-import {RouteStrategy} from '../../types/routeStrategy'
-import {Kubectl} from '../../types/kubectl'
+import {sleep} from '../../utilities/timeUtils.js'
+import {RouteStrategy} from '../../types/routeStrategy.js'
+import {Kubectl} from '../../types/kubectl.js'
 import {
   BlueGreenDeployment,
   BlueGreenManifests
-} from '../../types/blueGreenTypes'
+} from '../../types/blueGreenTypes.js'
 import {
   getManifestObjects,
   GREEN_LABEL_VALUE,
   deployObjects
-} from './blueGreenHelper'
+} from './blueGreenHelper.js'

 import {
   getUpdatedBlueGreenIngress,
   isIngressRouted
-} from './ingressBlueGreenHelper'
-import {getUpdatedBlueGreenService} from './serviceBlueGreenHelper'
-import {createTrafficSplitObject} from './smiBlueGreenHelper'
+} from './ingressBlueGreenHelper.js'
+import {getUpdatedBlueGreenService} from './serviceBlueGreenHelper.js'
+import {createTrafficSplitObject} from './smiBlueGreenHelper.js'

 import * as core from '@actions/core'
-import {K8sObject, TrafficSplitObject} from '../../types/k8sObject'
-import {getBufferTime} from '../../inputUtils'
+import {K8sObject, TrafficSplitObject} from '../../types/k8sObject.js'
+import {getBufferTime} from '../../inputUtils.js'

 export async function routeBlueGreenForDeploy(
   kubectl: Kubectl,
@@ -1,26 +1,26 @@
+import {vi} from 'vitest'
 import * as core from '@actions/core'
 import {
   BLUE_GREEN_VERSION_LABEL,
   getManifestObjects,
   GREEN_LABEL_VALUE
-} from './blueGreenHelper'
-import * as bgHelper from './blueGreenHelper'
-import {Kubectl} from '../../types/kubectl'
+} from './blueGreenHelper.js'
+import * as bgHelper from './blueGreenHelper.js'
+import {Kubectl} from '../../types/kubectl.js'
 import {
   getServiceSpecLabel,
   getUpdatedBlueGreenService,
   validateServicesState
-} from './serviceBlueGreenHelper'
+} from './serviceBlueGreenHelper.js'

 let testObjects
 const ingressFilepath = ['test/unit/manifests/test-ingress-new.yml']
-jest.mock('../../types/kubectl')
+vi.mock('../../types/kubectl')
 const kubectl = new Kubectl('')

 describe('blue/green service helper tests', () => {
   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
+      vi.mocked(Kubectl).mockClear()
      testObjects = getManifestObjects(ingressFilepath)
   })

@@ -42,7 +42,7 @@ describe('blue/green service helper tests', () => {
      mockLabels[BLUE_GREEN_VERSION_LABEL] = bgHelper.GREEN_LABEL_VALUE
      const mockSelectors = new Map<string, string>()
      mockSelectors[BLUE_GREEN_VERSION_LABEL] = GREEN_LABEL_VALUE
-      jest.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
+      vi.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
         Promise.resolve({
            kind: 'Service',
            spec: {selector: mockSelectors},
@@ -1,12 +1,12 @@
 import * as core from '@actions/core'
-import {K8sServiceObject} from '../../types/k8sObject'
-import {Kubectl} from '../../types/kubectl'
+import {K8sServiceObject} from '../../types/k8sObject.js'
+import {Kubectl} from '../../types/kubectl.js'
 import {
   addBlueGreenLabelsAndAnnotations,
   BLUE_GREEN_VERSION_LABEL,
   fetchResource,
   GREEN_LABEL_VALUE
-} from './blueGreenHelper'
+} from './blueGreenHelper.js'

 // add green labels to configure existing service
 export function getUpdatedBlueGreenService(
@@ -1,15 +1,16 @@
-import {TrafficSplitObject} from '../../types/k8sObject'
-import {Kubectl} from '../../types/kubectl'
-import * as fileHelper from '../../utilities/fileUtils'
-import * as TSutils from '../../utilities/trafficSplitUtils'
+import {vi} from 'vitest'
+import {TrafficSplitObject} from '../../types/k8sObject.js'
+import {Kubectl} from '../../types/kubectl.js'
+import * as fileHelper from '../../utilities/fileUtils.js'
+import * as TSutils from '../../utilities/trafficSplitUtils.js'

-import {BlueGreenManifests} from '../../types/blueGreenTypes'
+import {BlueGreenManifests} from '../../types/blueGreenTypes.js'
 import {
   BLUE_GREEN_VERSION_LABEL,
   getManifestObjects,
   GREEN_LABEL_VALUE,
   NONE_LABEL_VALUE
-} from './blueGreenHelper'
+} from './blueGreenHelper.js'

 import {
   cleanupSMI,
@@ -21,10 +22,10 @@ import {
   setupSMI,
   TRAFFIC_SPLIT_OBJECT,
   validateTrafficSplitsState
-} from './smiBlueGreenHelper'
-import * as bgHelper from './blueGreenHelper'
+} from './smiBlueGreenHelper.js'
+import * as bgHelper from './blueGreenHelper.js'

-jest.mock('../../types/kubectl')
+vi.mock('../../types/kubectl')

 const kc = new Kubectl('')
 const ingressFilepath = ['test/unit/manifests/test-ingress-new.yml']
@@ -68,21 +69,20 @@ const mockTsObject: TrafficSplitObject = {
 describe('SMI Helper tests', () => {
   let testObjects: BlueGreenManifests
   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
+      vi.mocked(Kubectl).mockClear()

-      jest
-         .spyOn(TSutils, 'getTrafficSplitAPIVersion')
-         .mockImplementation(() => Promise.resolve(''))
+      vi.spyOn(TSutils, 'getTrafficSplitAPIVersion').mockImplementation(() =>
+         Promise.resolve('')
+      )

      testObjects = getManifestObjects(ingressFilepath)
-      jest
-         .spyOn(fileHelper, 'writeObjectsToFile')
-         .mockImplementationOnce(() => [''])
+      vi.spyOn(fileHelper, 'writeObjectsToFile').mockImplementationOnce(() => [
+         ''
+      ])
   })

   test('setupSMI tests', async () => {
-      jest.spyOn(kc, 'apply').mockResolvedValue(mockSuccessResult)
+      vi.spyOn(kc, 'apply').mockResolvedValue(mockSuccessResult)

      const smiResults = await setupSMI(kc, testObjects.serviceEntityList)

@@ -174,9 +174,9 @@ describe('SMI Helper tests', () => {
   })

   test('validateTrafficSplitsState', async () => {
-      jest
-         .spyOn(bgHelper, 'fetchResource')
-         .mockImplementation(() => Promise.resolve(mockTsObject))
+      vi.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
+         Promise.resolve(mockTsObject)
+      )

      let valResult = await validateTrafficSplitsState(
         kc,
@@ -187,9 +187,9 @@ describe('SMI Helper tests', () => {

      const mockTsCopy = JSON.parse(JSON.stringify(mockTsObject))
      mockTsCopy.spec.backends[0].weight = MAX_VAL
-      jest
-         .spyOn(bgHelper, 'fetchResource')
-         .mockImplementation(() => Promise.resolve(mockTsCopy))
+      vi.spyOn(bgHelper, 'fetchResource').mockImplementation(() =>
+         Promise.resolve(mockTsCopy)
+      )

      valResult = await validateTrafficSplitsState(
         kc,
@@ -197,7 +197,7 @@ describe('SMI Helper tests', () => {
      )
      expect(valResult).toBe(false)

-      jest.spyOn(bgHelper, 'fetchResource').mockImplementation()
+      vi.spyOn(bgHelper, 'fetchResource').mockResolvedValue(null)
      valResult = await validateTrafficSplitsState(
         kc,
         testObjects.serviceEntityList
@@ -218,7 +218,7 @@ describe('SMI Helper tests', () => {
         name: 'should throw error when kubectl apply fails during SMI setup',
         fn: () => setupSMI(kc, testObjects.serviceEntityList),
         setup: () => {
-            jest.spyOn(kc, 'apply').mockResolvedValue(mockFailureResult)
+            vi.spyOn(kc, 'apply').mockResolvedValue(mockFailureResult)
         }
      }
   ])('$name', async ({fn, setup}) => {
@@ -229,7 +229,7 @@ describe('SMI Helper tests', () => {

   // Timeout-specific tests
   test('setupSMI with timeout test', async () => {
-      const deployObjectsSpy = jest
+      const deployObjectsSpy = vi
         .spyOn(bgHelper, 'deployObjects')
         .mockResolvedValue({
            execResult: mockSuccessResult,
@@ -257,7 +257,7 @@ describe('SMI Helper tests', () => {
   })

   test('createTrafficSplitObject with timeout test', async () => {
-      const deleteObjectsSpy = jest
+      const deleteObjectsSpy = vi
         .spyOn(bgHelper, 'deleteObjects')
         .mockResolvedValue()

@@ -288,7 +288,7 @@ describe('SMI Helper tests', () => {
   })

   test('createTrafficSplitObject with GREEN_LABEL_VALUE and timeout test', async () => {
-      const deleteObjectsSpy = jest
+      const deleteObjectsSpy = vi
         .spyOn(bgHelper, 'deleteObjects')
         .mockResolvedValue()

@@ -321,7 +321,7 @@ describe('SMI Helper tests', () => {
   })

   test('cleanupSMI with timeout test', async () => {
-      const deleteObjectsSpy = jest
+      const deleteObjectsSpy = vi
         .spyOn(bgHelper, 'deleteObjects')
         .mockResolvedValue()

@@ -352,7 +352,7 @@ describe('SMI Helper tests', () => {
   })

   test('setupSMI without timeout test', async () => {
-      const deployObjectsSpy = jest
+      const deployObjectsSpy = vi
         .spyOn(bgHelper, 'deployObjects')
         .mockResolvedValue({
            execResult: mockSuccessResult,
@@ -375,7 +375,7 @@ describe('SMI Helper tests', () => {
   })

   test('createTrafficSplitObject without timeout test', async () => {
-      const deleteObjectsSpy = jest
+      const deleteObjectsSpy = vi
         .spyOn(bgHelper, 'deleteObjects')
         .mockResolvedValue()

@@ -398,7 +398,7 @@ describe('SMI Helper tests', () => {
   })

   test('cleanupSMI without timeout test', async () => {
-      const deleteObjectsSpy = jest
+      const deleteObjectsSpy = vi
         .spyOn(bgHelper, 'deleteObjects')
         .mockResolvedValue()

@@ -1,6 +1,6 @@
 import * as core from '@actions/core'
-import {Kubectl} from '../../types/kubectl'
-import * as kubectlUtils from '../../utilities/trafficSplitUtils'
+import {Kubectl} from '../../types/kubectl.js'
+import * as kubectlUtils from '../../utilities/trafficSplitUtils.js'
 import {
   deleteObjects,
   deployObjects,
@@ -11,15 +11,15 @@ import {
   GREEN_SUFFIX,
   NONE_LABEL_VALUE,
   STABLE_SUFFIX
-} from './blueGreenHelper'
-import {BlueGreenDeployment} from '../../types/blueGreenTypes'
+} from './blueGreenHelper.js'
+import {BlueGreenDeployment} from '../../types/blueGreenTypes.js'
 import {
   K8sDeleteObject,
   K8sObject,
   TrafficSplitObject
-} from '../../types/k8sObject'
-import {DeployResult} from '../../types/deployResult'
-import {inputAnnotations} from '../../inputUtils'
+} from '../../types/k8sObject.js'
+import {DeployResult} from '../../types/deployResult.js'
+import {inputAnnotations} from '../../inputUtils.js'

 export const TRAFFIC_SPLIT_OBJECT_NAME_SUFFIX = '-trafficsplit'
 export const TRAFFIC_SPLIT_OBJECT = 'TrafficSplit'
@@ -1,4 +1,4 @@
-import {Kubectl} from '../../types/kubectl'
+import {Kubectl} from '../../types/kubectl.js'
 import * as fs from 'fs'
 import * as yaml from 'js-yaml'
 import * as core from '@actions/core'
@@ -7,15 +7,15 @@ import {
   isDeploymentEntity,
   isServiceEntity,
   KubernetesWorkload
-} from '../../types/kubernetesTypes'
-import * as utils from '../../utilities/manifestUpdateUtils'
+} from '../../types/kubernetesTypes.js'
+import * as utils from '../../utilities/manifestUpdateUtils.js'
 import {
   updateObjectAnnotations,
   updateObjectLabels,
   updateSelectorLabels
-} from '../../utilities/manifestUpdateUtils'
-import {updateSpecLabels} from '../../utilities/manifestSpecLabelUtils'
-import {checkForErrors} from '../../utilities/kubectlUtils'
+} from '../../utilities/manifestUpdateUtils.js'
+import {updateSpecLabels} from '../../utilities/manifestSpecLabelUtils.js'
+import {checkForErrors} from '../../utilities/kubectlUtils.js'

 export const CANARY_VERSION_LABEL = 'workflow/version'
 const BASELINE_SUFFIX = '-baseline'
@@ -1,11 +1,15 @@
+import {vi} from 'vitest'
+import type {MockInstance} from 'vitest'
+vi.mock('@actions/core')
+
 import * as core from '@actions/core'
-import {Kubectl} from '../../types/kubectl'
+import {Kubectl} from '../../types/kubectl.js'
 import {
   deployPodCanary,
   calculateReplicaCountForCanary
-} from './podCanaryHelper'
+} from './podCanaryHelper.js'

-jest.mock('../../types/kubectl')
+vi.mock('../../types/kubectl')

 const kc = new Kubectl('')

@@ -35,18 +39,17 @@ const TIMEOUT_300S = '300s'

 describe('Pod Canary Helper tests', () => {
   let mockFilePaths: string[]
-   let kubectlApplySpy: jest.SpyInstance
+   let kubectlApplySpy: MockInstance

   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
-      jest.restoreAllMocks()
+      vi.mocked(Kubectl).mockClear()
+      vi.restoreAllMocks()

      mockFilePaths = testManifestFiles
-      kubectlApplySpy = jest.spyOn(kc, 'apply')
+      kubectlApplySpy = vi.spyOn(kc, 'apply')

      // Mock core.getInput with default values
-      jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+      vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
         switch (name) {
            case 'percentage':
               return VALID_PERCENTAGE.toString()
@@ -61,7 +64,7 @@ describe('Pod Canary Helper tests', () => {
   })

   afterEach(() => {
-      jest.restoreAllMocks()
+      vi.restoreAllMocks()
      kubectlApplySpy.mockClear()
   })

@@ -114,7 +117,7 @@ describe('Pod Canary Helper tests', () => {
      })

      test('should throw error for invalid low percentage', async () => {
-         jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+         vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
            if (name === 'percentage') return INVALID_LOW_PERCENTAGE.toString()
            return ''
         })
@@ -127,7 +130,7 @@ describe('Pod Canary Helper tests', () => {
      })

      test('should throw error for invalid high percentage', async () => {
-         jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+         vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
            if (name === 'percentage') return INVALID_HIGH_PERCENTAGE.toString()
            return ''
         })
@@ -143,7 +146,7 @@ describe('Pod Canary Helper tests', () => {
         kubectlApplySpy.mockResolvedValue(mockSuccessResult)

         // Test minimum valid percentage
-         jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+         vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
            if (name === 'percentage') return MIN_PERCENTAGE.toString()
            return ''
         })
@@ -152,7 +155,7 @@ describe('Pod Canary Helper tests', () => {
         expect(resultMin.execResult).toEqual(mockSuccessResult)

         // Test maximum valid percentage
-         jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+         vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
            if (name === 'percentage') return MAX_PERCENTAGE.toString()
            return ''
         })
@@ -162,7 +165,7 @@ describe('Pod Canary Helper tests', () => {
      })

      test('should handle force deployment option', async () => {
-         jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+         vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
            switch (name) {
               case 'percentage':
                  return VALID_PERCENTAGE.toString()
@@ -186,7 +189,7 @@ describe('Pod Canary Helper tests', () => {
      })

      test('should handle server-side apply option', async () => {
-         jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+         vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
            switch (name) {
               case 'percentage':
                  return VALID_PERCENTAGE.toString()
@@ -1,15 +1,15 @@
-import {Kubectl} from '../../types/kubectl'
+import {Kubectl} from '../../types/kubectl.js'
 import * as core from '@actions/core'
 import * as fs from 'fs'
 import * as yaml from 'js-yaml'

-import * as fileHelper from '../../utilities/fileUtils'
-import * as canaryDeploymentHelper from './canaryHelper'
-import {isDeploymentEntity} from '../../types/kubernetesTypes'
-import {getReplicaCount} from '../../utilities/manifestUpdateUtils'
-import {DeployResult} from '../../types/deployResult'
-import {K8sObject} from '../../types/k8sObject'
-import {checkForErrors} from '../../utilities/kubectlUtils'
+import * as fileHelper from '../../utilities/fileUtils.js'
+import * as canaryDeploymentHelper from './canaryHelper.js'
+import {isDeploymentEntity} from '../../types/kubernetesTypes.js'
+import {getReplicaCount} from '../../utilities/manifestUpdateUtils.js'
+import {DeployResult} from '../../types/deployResult.js'
+import {K8sObject} from '../../types/k8sObject.js'
+import {checkForErrors} from '../../utilities/kubectlUtils.js'

 export async function deployPodCanary(
   filePaths: string[],
@@ -1,13 +1,34 @@
+import {vi} from 'vitest'
+import type {MockInstance} from 'vitest'
+vi.mock('@actions/core', async (importOriginal) => {
+   const actual: any = await importOriginal()
+   return {
+      ...actual,
+      getInput: vi.fn().mockReturnValue(''),
+      debug: vi.fn(),
+      info: vi.fn(),
+      warning: vi.fn(),
+      error: vi.fn(),
+      setFailed: vi.fn(),
+      setOutput: vi.fn(),
+      group: vi
+         .fn()
+         .mockImplementation(
+            async (_name: string, fn: () => Promise<void>) => await fn()
+         )
+   }
+})
+
 import * as core from '@actions/core'
 import * as fs from 'fs'
-import {Kubectl} from '../../types/kubectl'
+import {Kubectl} from '../../types/kubectl.js'
 import {
   deploySMICanary,
   redirectTrafficToCanaryDeployment,
   redirectTrafficToStableDeployment
-} from './smiCanaryHelper'
+} from './smiCanaryHelper.js'

-jest.mock('../../types/kubectl')
+vi.mock('../../types/kubectl')

 const kc = new Kubectl('')

@@ -40,22 +61,21 @@ const TIMEOUT_240S = '240s'

 describe('SMI Canary Helper tests', () => {
   let mockFilePaths: string[]
-   let kubectlApplySpy: jest.SpyInstance
-   let kubectlExecuteCommandSpy: jest.SpyInstance
+   let kubectlApplySpy: MockInstance
+   let kubectlExecuteCommandSpy: MockInstance

   beforeEach(() => {
-      //@ts-ignore
-      Kubectl.mockClear()
-      jest.restoreAllMocks()
+      vi.mocked(Kubectl).mockClear()
+      vi.restoreAllMocks()

      mockFilePaths = testManifestFiles
-      kubectlApplySpy = jest.spyOn(kc, 'apply')
-      kubectlExecuteCommandSpy = jest
+      kubectlApplySpy = vi.spyOn(kc, 'apply')
+      kubectlExecuteCommandSpy = vi
         .spyOn(kc, 'executeCommand')
         .mockResolvedValue(mockExecuteCommandResult)

      // Mock core.getInput with default values
-      jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+      vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
         switch (name) {
            case 'percentage':
               return '50'
@@ -72,7 +92,7 @@ describe('SMI Canary Helper tests', () => {
   })

   afterEach(() => {
-      jest.restoreAllMocks()
+      vi.restoreAllMocks()
      kubectlApplySpy.mockClear()
   })

@@ -106,7 +126,7 @@ describe('SMI Canary Helper tests', () => {
      })

      test('should handle custom replica count from input', async () => {
-         jest.spyOn(core, 'getInput').mockImplementation((name: string) => {
+         vi.spyOn(core, 'getInput').mockImplementation((name: string) => {
            switch (name) {
               case 'baseline-and-canary-replicas':
                  return VALID_REPLICA_COUNT.toString()
@@ -1,17 +1,20 @@
-import {Kubectl} from '../../types/kubectl'
+import {Kubectl} from '../../types/kubectl.js'
 import * as core from '@actions/core'
 import * as fs from 'fs'
 import * as yaml from 'js-yaml'

-import * as fileHelper from '../../utilities/fileUtils'
-import * as kubectlUtils from '../../utilities/trafficSplitUtils'
-import * as canaryDeploymentHelper from './canaryHelper'
-import * as podCanaryHelper from './podCanaryHelper'
-import {isDeploymentEntity, isServiceEntity} from '../../types/kubernetesTypes'
-import {checkForErrors} from '../../utilities/kubectlUtils'
-import {inputAnnotations} from '../../inputUtils'
-import {DeployResult} from '../../types/deployResult'
-import {K8sObject} from '../../types/k8sObject'
+import * as fileHelper from '../../utilities/fileUtils.js'
+import * as kubectlUtils from '../../utilities/trafficSplitUtils.js'
+import * as canaryDeploymentHelper from './canaryHelper.js'
+import * as podCanaryHelper from './podCanaryHelper.js'
+import {
+   isDeploymentEntity,
+   isServiceEntity
+} from '../../types/kubernetesTypes.js'
+import {checkForErrors} from '../../utilities/kubectlUtils.js'
+import {inputAnnotations} from '../../inputUtils.js'
+import {DeployResult} from '../../types/deployResult.js'
+import {K8sObject} from '../../types/k8sObject.js'

 const TRAFFIC_SPLIT_OBJECT_NAME_SUFFIX = '-workflow-rollout'
 const TRAFFIC_SPLIT_OBJECT = 'TrafficSplit'
@@ -1,41 +1,41 @@
 import * as fs from 'fs'
 import * as yaml from 'js-yaml'
-import * as canaryDeploymentHelper from './canary/canaryHelper'
-import * as models from '../types/kubernetesTypes'
-import {isDeploymentEntity} from '../types/kubernetesTypes'
-import * as fileHelper from '../utilities/fileUtils'
-import * as KubernetesManifestUtility from '../utilities/manifestStabilityUtils'
-import {Kubectl, Resource} from '../types/kubectl'
+import * as canaryDeploymentHelper from './canary/canaryHelper.js'
+import * as models from '../types/kubernetesTypes.js'
+import {isDeploymentEntity} from '../types/kubernetesTypes.js'
+import * as fileHelper from '../utilities/fileUtils.js'
+import * as KubernetesManifestUtility from '../utilities/manifestStabilityUtils.js'
+import {Kubectl, Resource} from '../types/kubectl.js'

-import {deployPodCanary} from './canary/podCanaryHelper'
-import {deploySMICanary} from './canary/smiCanaryHelper'
-import {DeploymentConfig} from '../types/deploymentConfig'
-import {deployBlueGreen} from './blueGreen/deploy'
-import {DeploymentStrategy} from '../types/deploymentStrategy'
+import {deployPodCanary} from './canary/podCanaryHelper.js'
+import {deploySMICanary} from './canary/smiCanaryHelper.js'
+import {DeploymentConfig} from '../types/deploymentConfig.js'
+import {deployBlueGreen} from './blueGreen/deploy.js'
+import {DeploymentStrategy} from '../types/deploymentStrategy.js'
 import * as core from '@actions/core'
 import {
   parseTrafficSplitMethod,
   TrafficSplitMethod
-} from '../types/trafficSplitMethod'
-import {parseRouteStrategy} from '../types/routeStrategy'
+} from '../types/trafficSplitMethod.js'
+import {parseRouteStrategy} from '../types/routeStrategy.js'
 import {ExecOutput} from '@actions/exec'
 import {
   getWorkflowAnnotationKeyLabel,
   getWorkflowAnnotations,
   cleanLabel
-} from '../utilities/workflowAnnotationUtils'
+} from '../utilities/workflowAnnotationUtils.js'
 import {
   annotateChildPods,
   checkForErrors,
   getLastSuccessfulRunSha
-} from '../utilities/kubectlUtils'
+} from '../utilities/kubectlUtils.js'
 import {
   getWorkflowFilePath,
   normalizeWorkflowStrLabel
-} from '../utilities/githubUtils'
-import {getDeploymentConfig} from '../utilities/dockerUtils'
-import {DeployResult} from '../types/deployResult'
-import {ClusterType} from '../inputUtils'
+} from '../utilities/githubUtils.js'
+import {getDeploymentConfig} from '../utilities/dockerUtils.js'
+import {DeployResult} from '../types/deployResult.js'
+import {ClusterType} from '../inputUtils.js'

 export async function deployManifests(
   files: string[],
@@ -1,4 +1,4 @@
-import {Action, parseAction} from './action'
+import {Action, parseAction} from './action.js'

 describe('Action type', () => {
   test('it has required values', () => {
@@ -1,5 +1,5 @@
-import {DeployResult} from './deployResult'
-import {K8sObject, K8sDeleteObject} from './k8sObject'
+import {DeployResult} from './deployResult.js'
+import {K8sObject, K8sDeleteObject} from './k8sObject.js'

 export interface BlueGreenDeployment {
   deployResult: DeployResult
@@ -1,4 +1,7 @@
-import {DeploymentStrategy, parseDeploymentStrategy} from './deploymentStrategy'
+import {
+   DeploymentStrategy,
+   parseDeploymentStrategy
+} from './deploymentStrategy.js'

 describe('Deployment strategy type', () => {
   test('it has required values', () => {
@@ -1,4 +1,7 @@
-import {DockerExec} from './docker'
+import {vi} from 'vitest'
+vi.mock('@actions/exec')
+
+import {DockerExec} from './docker.js'
 import * as actions from '@actions/exec'

 const dockerPath = 'dockerPath'
@@ -12,7 +15,7 @@ describe('Docker class', () => {
      const execReturn = {exitCode: 0, stdout: 'Output', stderr: ''}

      beforeEach(() => {
-         jest.spyOn(actions, 'getExecOutput').mockImplementation(async () => {
+         vi.spyOn(actions, 'getExecOutput').mockImplementation(async () => {
            return execReturn
         })
      })
@@ -60,7 +63,7 @@ describe('Docker class', () => {
      const execReturn = {exitCode: 3, stdout: '', stderr: ''}

      beforeEach(() => {
-         jest.spyOn(actions, 'getExecOutput').mockImplementation(async () => {
+         vi.spyOn(actions, 'getExecOutput').mockImplementation(async () => {
            return execReturn
         })
      })
@@ -80,7 +83,7 @@ describe('Docker class', () => {
      const execReturn = {exitCode: 0, stdout: '', stderr: 'Output'}

      beforeEach(() => {
-         jest.spyOn(actions, 'getExecOutput').mockImplementation(async () => {
+         vi.spyOn(actions, 'getExecOutput').mockImplementation(async () => {
            return execReturn
         })
      })
@@ -1,4 +1,10 @@
-import {getKubectlPath, Kubectl} from './kubectl'
+import {vi} from 'vitest'
+vi.mock('@actions/exec')
+vi.mock('@actions/io')
+vi.mock('@actions/core')
+vi.mock('@actions/tool-cache')
+
+import {getKubectlPath, Kubectl} from './kubectl.js'
 import * as exec from '@actions/exec'
 import * as io from '@actions/io'
 import * as core from '@actions/core'
@@ -9,27 +15,27 @@ describe('Kubectl path', () => {
   const path = 'path'

   it('gets the kubectl path', async () => {
-      jest.spyOn(core, 'getInput').mockImplementationOnce(() => '')
-      jest.spyOn(io, 'which').mockImplementationOnce(async () => path)
+      vi.spyOn(core, 'getInput').mockImplementationOnce(() => '')
+      vi.spyOn(io, 'which').mockImplementationOnce(async () => path)

      expect(await getKubectlPath()).toBe(path)
   })

   it('gets the kubectl path with version', async () => {
-      jest.spyOn(core, 'getInput').mockImplementationOnce(() => version)
-      jest.spyOn(toolCache, 'find').mockImplementationOnce(() => path)
+      vi.spyOn(core, 'getInput').mockImplementationOnce(() => version)
+      vi.spyOn(toolCache, 'find').mockImplementationOnce(() => path)

      expect(await getKubectlPath()).toBe(path)
   })

   it('throws if kubectl not found', async () => {
      // without version
-      jest.spyOn(io, 'which').mockImplementationOnce(async () => '')
+      vi.spyOn(io, 'which').mockImplementationOnce(async () => '')
      await expect(() => getKubectlPath()).rejects.toThrow()

      // with verision
-      jest.spyOn(core, 'getInput').mockImplementationOnce(() => '')
-      jest.spyOn(io, 'which').mockImplementationOnce(async () => '')
+      vi.spyOn(core, 'getInput').mockImplementationOnce(() => '')
+      vi.spyOn(io, 'which').mockImplementationOnce(async () => '')
      await expect(() => getKubectlPath()).rejects.toThrow()
   })
 })
@@ -46,7 +52,7 @@ describe('Kubectl class', () => {
      const mockExecReturn = {exitCode: 0, stdout: 'Output', stderr: ''}

      beforeEach(() => {
-         jest.spyOn(exec, 'getExecOutput').mockImplementation(async () => {
+         vi.spyOn(exec, 'getExecOutput').mockImplementation(async () => {
            return mockExecReturn
         })
      })
@@ -637,7 +643,7 @@ describe('Kubectl class', () => {
         stderr: ''
      }

-      jest.spyOn(exec, 'getExecOutput').mockImplementationOnce(async () => {
+      vi.spyOn(exec, 'getExecOutput').mockImplementationOnce(async () => {
         return describeReturn
      })

@@ -650,7 +656,7 @@ describe('Kubectl class', () => {
      const skipTls = true
      const kubectl = new Kubectl(kubectlPath, testNamespace, skipTls)

-      jest.spyOn(exec, 'getExecOutput').mockImplementation(async () => {
+      vi.spyOn(exec, 'getExecOutput').mockImplementation(async () => {
         return {exitCode: 0, stderr: '', stdout: ''}
      })

@@ -677,7 +683,7 @@ describe('Kubectl namespace handling', () => {
   const execReturn = {exitCode: 0, stdout: 'Output', stderr: ''}

   beforeEach(() => {
-      jest.spyOn(exec, 'getExecOutput').mockResolvedValue(execReturn)
+      vi.spyOn(exec, 'getExecOutput').mockResolvedValue(execReturn)
   })

   const runApply = async (namespace?: string) => {
@@ -1,5 +1,5 @@
 import {ExecOutput, getExecOutput} from '@actions/exec'
-import {createInlineArray} from '../utilities/arrayUtils'
+import {createInlineArray} from '../utilities/arrayUtils.js'
 import * as core from '@actions/core'
 import * as toolCache from '@actions/tool-cache'
 import * as io from '@actions/io'
@@ -238,13 +238,17 @@ export class Kubectl {
      })
   }

+   public getNamespace(namespaceOverride?: string): string {
+      return namespaceOverride || this.namespace
+   }
+
   protected getFlags(namespaceOverride?: string): string[] {
      const flags = []
      if (this.ignoreSSLErrors) {
         flags.push('--insecure-skip-tls-verify')
      }

-      const ns = namespaceOverride || this.namespace
+      const ns = this.getNamespace(namespaceOverride)
      if (ns) {
         flags.push('--namespace', ns)
      }
@@ -10,7 +10,7 @@ import {
   ServiceTypes,
   WORKLOAD_TYPES,
   WORKLOAD_TYPES_WITH_ROLLOUT_STATUS
-} from './kubernetesTypes'
+} from './kubernetesTypes.js'

 describe('Kubernetes types', () => {
   it('contains kubernetes workloads', () => {
@@ -1,10 +1,13 @@
-import * as fileUtils from '../utilities/fileUtils'
+import {vi} from 'vitest'
+vi.mock('@actions/exec')
+
+import * as fileUtils from '../utilities/fileUtils.js'
 import fs from 'node:fs'
 import {
   PrivateKubectl,
   extractFileNames,
   replaceFileNamesWithShallowNamesRelativeToTemp
-} from './privatekubectl'
+} from './privatekubectl.js'
 import * as exec from '@actions/exec'

 describe('Private kubectl', () => {
@@ -17,14 +20,14 @@ describe('Private kubectl', () => {
      'resourceName'
   )

-   const spy = jest
+   const spy = vi
      .spyOn(fileUtils, 'getTempDirectory')
      .mockImplementation(() => {
         return '/tmp'
      })

-   jest.spyOn(fs, 'writeFileSync').mockImplementation(() => {})
-   jest.spyOn(fs, 'readFileSync').mockImplementation((filename) => {
+   vi.spyOn(fs, 'writeFileSync').mockImplementation(() => {})
+   vi.spyOn(fs, 'readFileSync').mockImplementation((filename) => {
      return 'test contents'
   })

@@ -48,7 +51,7 @@ describe('Private kubectl', () => {

   test('Should throw well defined Error on error from Azure', async () => {
      const errorMsg = 'An error message'
-      jest.spyOn(exec, 'getExecOutput').mockImplementation(async () => {
+      vi.spyOn(exec, 'getExecOutput').mockImplementation(async () => {
         return {exitCode: 1, stdout: '', stderr: errorMsg}
      })

@@ -1,10 +1,10 @@
-import {Kubectl} from './kubectl'
+import {Kubectl} from './kubectl.js'
 import minimist from 'minimist'
 import {ExecOptions, ExecOutput, getExecOutput} from '@actions/exec'
 import * as core from '@actions/core'
 import fs from 'node:fs'
 import * as path from 'path'
-import {getTempDirectory} from '../utilities/fileUtils'
+import {getTempDirectory} from '../utilities/fileUtils.js'

 export class PrivateKubectl extends Kubectl {
   protected async execute(args: string[], silent: boolean = false) {
@@ -1,4 +1,4 @@
-import {parseRouteStrategy, RouteStrategy} from './routeStrategy'
+import {parseRouteStrategy, RouteStrategy} from './routeStrategy.js'

 describe('Route strategy type', () => {
   test('it has required values', () => {
@@ -1,4 +1,7 @@
-import {parseTrafficSplitMethod, TrafficSplitMethod} from './trafficSplitMethod'
+import {
+   parseTrafficSplitMethod,
+   TrafficSplitMethod
+} from './trafficSplitMethod.js'

 describe('Traffic split method type', () => {
   test('it has required values', () => {
@@ -1,4 +1,4 @@
-import {createInlineArray} from './arrayUtils'
+import {createInlineArray} from './arrayUtils.js'

 describe('array utilities', () => {
   it('creates an inline array', () => {
@@ -1,15 +1,18 @@
+import {vi} from 'vitest'
+vi.mock('@actions/io')
+
 import * as io from '@actions/io'
-import {checkDockerPath} from './dockerUtils'
+import {checkDockerPath} from './dockerUtils.js'

 describe('docker utilities', () => {
   it('checks if docker is installed', async () => {
      // docker installed
      const path = 'path'
-      jest.spyOn(io, 'which').mockImplementationOnce(async () => path)
+      vi.spyOn(io, 'which').mockImplementationOnce(async () => path)
      expect(() => checkDockerPath()).not.toThrow()

      // docker not installed
-      jest.spyOn(io, 'which').mockImplementationOnce(async () => {
+      vi.spyOn(io, 'which').mockImplementationOnce(async () => {
         throw new Error('not found')
      })
      await expect(() => checkDockerPath()).rejects.toThrow()
@@ -1,8 +1,8 @@
 import * as io from '@actions/io'
-import {DeploymentConfig} from '../types/deploymentConfig'
+import {DeploymentConfig} from '../types/deploymentConfig.js'
 import * as core from '@actions/core'
-import {DockerExec} from '../types/docker'
-import {getNormalizedPath} from './githubUtils'
+import {DockerExec} from '../types/docker.js'
+import {getNormalizedPath} from './githubUtils.js'

 export async function getDeploymentConfig(): Promise<DeploymentConfig> {
   let helmChartPaths: string[] =
@@ -1,9 +1,10 @@
-import {parseDuration} from './durationUtils'
+import {vi, type Mocked} from 'vitest'
+import {parseDuration} from './durationUtils.js'
 import * as core from '@actions/core'

 // Mock core.debug
-jest.mock('@actions/core')
-const mockCore = core as jest.Mocked<typeof core>
+vi.mock('@actions/core')
+const mockCore = core as Mocked<typeof core>

 // Test data constants
 const VALID_TIMEOUTS = {
@@ -46,7 +47,7 @@ const expectInvalidTimeout = (input: string, expectedError: string) => {

 describe('validateTimeoutDuration', () => {
   beforeEach(() => {
-      jest.clearAllMocks()
+      vi.clearAllMocks()
   })

   describe('valid timeout formats', () => {
@@ -90,7 +91,7 @@ describe('validateTimeoutDuration', () => {
            'No unit specified for timeout "5", assuming minutes'
         )

-         jest.clearAllMocks()
+         vi.clearAllMocks()

         parseDuration('30s')
         expect(mockCore.debug).not.toHaveBeenCalled()
@@ -1,9 +1,10 @@
-import * as fileUtils from './fileUtils'
+import {vi} from 'vitest'
+import * as fileUtils from './fileUtils.js'

 import * as yaml from 'js-yaml'
 import fs from 'node:fs'
 import * as path from 'path'
-import {K8sObject} from '../types/k8sObject'
+import {K8sObject} from '../types/k8sObject.js'

 const sampleYamlUrl =
   'https://raw.githubusercontent.com/kubernetes/website/main/content/en/examples/controllers/nginx-deployment.yaml'
@@ -69,7 +70,7 @@ describe('File utils', () => {
         'manifest_test_dir'
      )

-      expect(
+      await expect(
         fileUtils.getFilesFromDirectoriesAndURLs([badPath, goodPath])
      ).rejects.toThrow()
   })
@@ -108,8 +109,8 @@ describe('File utils', () => {

 describe('moving files to temp', () => {
   it('correctly moves the contents of a file to the temporary directory', () => {
-      jest.spyOn(fs, 'writeFileSync').mockImplementation(() => {})
-      jest.spyOn(fs, 'readFileSync').mockImplementation((filename) => {
+      vi.spyOn(fs, 'writeFileSync').mockImplementation(() => {})
+      vi.spyOn(fs, 'readFileSync').mockImplementation((filename) => {
         return 'test contents'
      })
      const originalFilePath = path.join('path', 'in', 'repo')
@@ -4,10 +4,10 @@ import * as path from 'path'
 import * as core from '@actions/core'
 import * as os from 'os'
 import * as yaml from 'js-yaml'
-import {Errorable, succeeded, failed, Failed} from '../types/errorable'
-import {getCurrentTime} from './timeUtils'
-import {isHttpUrl} from './githubUtils'
-import {K8sObject} from '../types/k8sObject'
+import {Errorable, succeeded, failed, Failed} from '../types/errorable.js'
+import {getCurrentTime} from './timeUtils.js'
+import {isHttpUrl} from './githubUtils.js'
+import {K8sObject} from '../types/k8sObject.js'

 export const urlFileKind = 'urlfile'

@@ -2,7 +2,7 @@ import {
   getNormalizedPath,
   isHttpUrl,
   normalizeWorkflowStrLabel
-} from './githubUtils'
+} from './githubUtils.js'

 describe('Github utils', () => {
   it('normalizes workflow string labels', () => {
@@ -1,4 +1,4 @@
-import {GitHubClient, OkStatusCode} from '../types/githubClient'
+import {GitHubClient, OkStatusCode} from '../types/githubClient.js'
 import * as core from '@actions/core'

 export async function getWorkflowFilePath(
@@ -1,6 +1,9 @@
+import {vi} from 'vitest'
+vi.mock('@actions/core')
+
 import * as core from '@actions/core'
 import {ExecOutput} from '@actions/exec'
-import {checkForErrors} from './kubectlUtils'
+import {checkForErrors} from './kubectlUtils.js'

 describe('Kubectl utils', () => {
   it('checks for errors', () => {
@@ -39,7 +42,8 @@ describe('Kubectl utils', () => {
      ).toThrow()

      // with warn behavior
-      jest.spyOn(core, 'warning').mockImplementation(() => {})
+      const warnSpy = vi.spyOn(core, 'warning').mockImplementation(() => {})
+      warnSpy.mockClear()
      let warningCalls = 0
      expect(() => checkForErrors([success], true)).not.toThrow()
      expect(core.warning).toHaveBeenCalledTimes(warningCalls)
@@ -1,6 +1,6 @@
 import * as core from '@actions/core'
 import {ExecOutput} from '@actions/exec'
-import {Kubectl} from '../types/kubectl'
+import {Kubectl} from '../types/kubectl.js'

 const NAMESPACE = 'namespace'

@@ -1,4 +1,4 @@
-import {KubernetesWorkload} from '../types/kubernetesTypes'
+import {KubernetesWorkload} from '../types/kubernetesTypes.js'

 export function getImagePullSecrets(inputObject: any) {
   const kind = inputObject?.kind?.toLowerCase()
@@ -3,7 +3,7 @@ import {
   isServiceEntity,
   KubernetesWorkload,
   NullInputObjectError
-} from '../types/kubernetesTypes'
+} from '../types/kubernetesTypes.js'

 export function updateSpecLabels(
   inputObject: any,
@@ -1,10 +1,29 @@
-import * as manifestStabilityUtils from './manifestStabilityUtils'
-import {Kubectl} from '../types/kubectl'
-import {ResourceTypeFleet, ResourceTypeManagedCluster} from '../actions/deploy'
+import {vi} from 'vitest'
+import type {MockInstance} from 'vitest'
+vi.mock('@actions/core', async (importOriginal) => {
+   const actual: any = await importOriginal()
+   return {
+      ...actual,
+      getInput: vi.fn().mockReturnValue(''),
+      debug: vi.fn(),
+      info: vi.fn(),
+      warning: vi.fn(),
+      error: vi.fn(),
+      setFailed: vi.fn(),
+      setOutput: vi.fn()
+   }
+})
+
+import * as manifestStabilityUtils from './manifestStabilityUtils.js'
+import {Kubectl} from '../types/kubectl.js'
+import {
+   ResourceTypeFleet,
+   ResourceTypeManagedCluster
+} from '../actions/deploy.js'
 import {ExecOutput} from '@actions/exec'
 import {exitCode, stdout} from 'process'
 import * as core from '@actions/core'
-import * as timeUtils from './timeUtils'
+import * as timeUtils from './timeUtils.js'

 describe('manifestStabilityUtils', () => {
   const kc = new Kubectl('')
@@ -17,8 +36,8 @@ describe('manifestStabilityUtils', () => {
   ]

   it('should return immediately if the resource type is fleet', async () => {
-      const spy = jest.spyOn(manifestStabilityUtils, 'checkManifestStability')
-      const checkRolloutStatusSpy = jest.spyOn(kc, 'checkRolloutStatus')
+      const spy = vi.spyOn(manifestStabilityUtils, 'checkManifestStability')
+      const checkRolloutStatusSpy = vi.spyOn(kc, 'checkRolloutStatus')
      await manifestStabilityUtils.checkManifestStability(
         kc,
         resources,
@@ -30,8 +49,8 @@ describe('manifestStabilityUtils', () => {
   })

   it('should run fully if the resource type is managedCluster', async () => {
-      const spy = jest.spyOn(manifestStabilityUtils, 'checkManifestStability')
-      const checkRolloutStatusSpy = jest
+      const spy = vi.spyOn(manifestStabilityUtils, 'checkManifestStability')
+      const checkRolloutStatusSpy = vi
         .spyOn(kc, 'checkRolloutStatus')
         .mockImplementation(() => {
            return new Promise<ExecOutput>((resolve, reject) => {
@@ -54,7 +73,7 @@ describe('manifestStabilityUtils', () => {

   it('should pass timeout to checkRolloutStatus when provided', async () => {
      const timeout = '300s'
-      const checkRolloutStatusSpy = jest
+      const checkRolloutStatusSpy = vi
         .spyOn(kc, 'checkRolloutStatus')
         .mockImplementation(() => {
            return new Promise<ExecOutput>((resolve, reject) => {
@@ -82,7 +101,7 @@ describe('manifestStabilityUtils', () => {
   })

   it('should call checkRolloutStatus without timeout when not provided', async () => {
-      const checkRolloutStatusSpy = jest
+      const checkRolloutStatusSpy = vi
         .spyOn(kc, 'checkRolloutStatus')
         .mockImplementation(() => {
            return new Promise<ExecOutput>((resolve, reject) => {
@@ -111,34 +130,76 @@ describe('manifestStabilityUtils', () => {

 describe('checkManifestStability failure and resource-specific scenarios', () => {
   let kc: Kubectl
-   let coreErrorSpy: jest.SpyInstance
-   let coreInfoSpy: jest.SpyInstance
-   let coreWarningSpy: jest.SpyInstance
+   let coreErrorSpy: MockInstance
+   let coreInfoSpy: MockInstance
+   let coreWarningSpy: MockInstance

   beforeEach(() => {
-      kc = new Kubectl('')
-      coreErrorSpy = jest.spyOn(core, 'error').mockImplementation()
-      coreInfoSpy = jest.spyOn(core, 'info').mockImplementation()
-      coreWarningSpy = jest.spyOn(core, 'warning').mockImplementation()
+      kc = new Kubectl('', 'default')
+      coreErrorSpy = vi.spyOn(core, 'error').mockImplementation(() => {})
+      coreInfoSpy = vi.spyOn(core, 'info').mockImplementation(() => {})
+      coreWarningSpy = vi.spyOn(core, 'warning').mockImplementation(() => {})
   })

   afterEach(() => {
-      jest.restoreAllMocks()
+      vi.restoreAllMocks()
   })

   it('should call describe and collect errors when a rollout fails', async () => {
      const resources = [
-         {type: 'deployment', name: 'failing-app', namespace: 'default'}
+         {type: 'deployment', name: 'failing-app', namespace: 'app-ns-123'}
      ]
      const rolloutError = new Error('Progress deadline exceeded')
      const describeOutput =
         'Events:\n  Type\tReason\tMessage\n  Normal\tScalingReplicaSet\tScaled up replica set failing-app-123 to 1'

      // Arrange: Mock rollout to fail and describe to succeed
-      const checkRolloutStatusSpy = jest
+      const checkRolloutStatusSpy = vi
         .spyOn(kc, 'checkRolloutStatus')
         .mockRejectedValue(rolloutError)
-      const describeSpy = jest.spyOn(kc, 'describe').mockResolvedValue({
+      const describeSpy = vi.spyOn(kc, 'describe').mockResolvedValue({
+         stdout: describeOutput,
+         stderr: '',
+         exitCode: 0
+      })
+
+      // Act & Assert: Expect the function to throw the final aggregated error
+      const expectedErrorMessage = `Rollout failed for deployment/failing-app in namespace app-ns-123: ${rolloutError.message}`
+      await expect(
+         manifestStabilityUtils.checkManifestStability(
+            kc,
+            resources,
+            ResourceTypeManagedCluster
+         )
+      ).rejects.toThrow(
+         `Rollout status failed for the following resources:\n${expectedErrorMessage}`
+      )
+
+      // Assert that the correct functions were called
+      expect(checkRolloutStatusSpy).toHaveBeenCalledTimes(1)
+      expect(coreErrorSpy).toHaveBeenCalledWith(expectedErrorMessage)
+      expect(describeSpy).toHaveBeenCalledWith(
+         'deployment',
+         'failing-app',
+         false,
+         'app-ns-123'
+      )
+      expect(coreInfoSpy).toHaveBeenCalledWith(
+         `Describe output for deployment/failing-app:\n${describeOutput}`
+      )
+   })
+
+   it('should use the default kubectl namespace when none is provided', async () => {
+      const resources = [{type: 'deployment', name: 'failing-app'}]
+      const rolloutError = new Error('Progress deadline exceeded')
+      const describeOutput =
+         'Events:\n  Type\tReason\tMessage\n  Normal\tScalingReplicaSet\tScaled up replica set failing-app-123 to 1'
+
+      // Arrange: Mock rollout to fail and describe to succeed
+      const checkRolloutStatusSpy = vi
+         .spyOn(kc, 'checkRolloutStatus')
+         .mockRejectedValue(rolloutError)
+      const describeSpy = vi.spyOn(kc, 'describe').mockResolvedValue({
         stdout: describeOutput,
         stderr: '',
         exitCode: 0
@@ -163,7 +224,7 @@ describe('checkManifestStability failure and resource-specific scenarios', () =>
         'deployment',
         'failing-app',
         false,
-         'default'
+         undefined
      )
      expect(coreInfoSpy).toHaveBeenCalledWith(
         `Describe output for deployment/failing-app:\n${describeOutput}`
@@ -174,10 +235,10 @@ describe('checkManifestStability failure and resource-specific scenarios', () =>
      const resources = [{type: 'Pod', name: 'test-pod', namespace: 'default'}]

      // Arrange: Spy on checkPodStatus and checkRolloutStatus
-      const checkPodStatusSpy = jest
+      const checkPodStatusSpy = vi
         .spyOn(manifestStabilityUtils, 'checkPodStatus')
         .mockResolvedValue() // Assume pod becomes ready
-      const checkRolloutStatusSpy = jest.spyOn(kc, 'checkRolloutStatus')
+      const checkRolloutStatusSpy = vi.spyOn(kc, 'checkRolloutStatus')

      // Act
      await manifestStabilityUtils.checkManifestStability(
@@ -198,10 +259,10 @@ describe('checkManifestStability failure and resource-specific scenarios', () =>
      const podError = new Error('Pod rollout failed')

      // Arrange: Mock checkPodStatus to fail
-      const checkPodStatusSpy = jest
+      const checkPodStatusSpy = vi
         .spyOn(manifestStabilityUtils, 'checkPodStatus')
         .mockRejectedValue(podError)
-      const describeSpy = jest.spyOn(kc, 'describe').mockResolvedValue({
+      const describeSpy = vi.spyOn(kc, 'describe').mockResolvedValue({
         stdout: 'describe output',
         stderr: '',
         exitCode: 0
@@ -229,7 +290,7 @@ describe('checkManifestStability failure and resource-specific scenarios', () =>

   it('should wait for external IP for a LoadBalancer service', async () => {
      //Spying on sleep to avoid actual delays in tests
-      jest.spyOn(timeUtils, 'sleep').mockResolvedValue(undefined)
+      vi.spyOn(timeUtils, 'sleep').mockResolvedValue(undefined)
      const resources = [
         {type: 'service', name: 'test-svc', namespace: 'default'}
      ]
@@ -243,7 +304,7 @@ describe('checkManifestStability failure and resource-specific scenarios', () =>
      }

      // Arrange: Mock getResource to simulate the IP being assigned on the second poll
-      const getResourceSpy = jest
+      const getResourceSpy = vi
         .spyOn(kc, 'getResource')
         // First call: Initial service check
         .mockResolvedValueOnce({
@@ -286,10 +347,10 @@ describe('checkManifestStability failure and resource-specific scenarios', () =>

      // Arrange: Mock getService to fail, and describe to succeed
      // Note: We mock getResource because getService is a private helper
-      const getResourceSpy = jest
+      const getResourceSpy = vi
         .spyOn(kc, 'getResource')
         .mockRejectedValue(getServiceError)
-      const describeSpy = jest.spyOn(kc, 'describe').mockResolvedValue({
+      const describeSpy = vi.spyOn(kc, 'describe').mockResolvedValue({
         stdout: 'describe output',
         stderr: '',
         exitCode: 0
@@ -327,7 +388,7 @@ describe('checkManifestStability failure and resource-specific scenarios', () =>
      }

      // Arrange
-      const getResourceSpy = jest.spyOn(kc, 'getResource').mockResolvedValue({
+      const getResourceSpy = vi.spyOn(kc, 'getResource').mockResolvedValue({
         stdout: JSON.stringify(clusterIpService),
         stderr: '',
         exitCode: 0
@@ -350,19 +411,19 @@ describe('checkManifestStability failure and resource-specific scenarios', () =>

 describe('checkManifestStability additional scenarios', () => {
   let kc: Kubectl
-   let coreErrorSpy: jest.SpyInstance
-   let coreInfoSpy: jest.SpyInstance
-   let coreWarningSpy: jest.SpyInstance
+   let coreErrorSpy: MockInstance
+   let coreInfoSpy: MockInstance
+   let coreWarningSpy: MockInstance

   beforeEach(() => {
      kc = new Kubectl('')
-      coreErrorSpy = jest.spyOn(core, 'error').mockImplementation()
-      coreInfoSpy = jest.spyOn(core, 'info').mockImplementation()
-      coreWarningSpy = jest.spyOn(core, 'warning').mockImplementation()
+      coreErrorSpy = vi.spyOn(core, 'error').mockImplementation(() => {})
+      coreInfoSpy = vi.spyOn(core, 'info').mockImplementation(() => {})
+      coreWarningSpy = vi.spyOn(core, 'warning').mockImplementation(() => {})
   })

   afterEach(() => {
-      jest.restoreAllMocks()
+      vi.restoreAllMocks()
   })

   it('should aggregate errors from deployment and pod failures', async () => {
@@ -374,15 +435,15 @@ describe('checkManifestStability additional scenarios', () => {
      const podError = new Error('Pod not ready in time')

      // Arrange: Mock failures
-      const checkRolloutStatusSpy = jest
+      const checkRolloutStatusSpy = vi
         .spyOn(kc, 'checkRolloutStatus')
         .mockRejectedValue(deploymentError)
      // For pod: simulate a pod check failure
-      const checkPodStatusSpy = jest
+      const checkPodStatusSpy = vi
         .spyOn(manifestStabilityUtils, 'checkPodStatus')
         .mockRejectedValue(podError)
      // For both, simulate a successful describe call to provide additional details
-      const describeSpy = jest.spyOn(kc, 'describe').mockResolvedValue({
+      const describeSpy = vi.spyOn(kc, 'describe').mockResolvedValue({
         stdout: 'describe aggregated output',
         stderr: '',
         exitCode: 0
@@ -421,25 +482,25 @@ describe('checkManifestStability additional scenarios', () => {

      // Arrange:
      // Deployment rollout succeeds
-      jest.spyOn(kc, 'checkRolloutStatus').mockResolvedValue({
+      vi.spyOn(kc, 'checkRolloutStatus').mockResolvedValue({
         exitCode: 0,
         stderr: '',
         stdout: ''
      })
      // Pod becomes ready
-      jest.spyOn(manifestStabilityUtils, 'checkPodStatus').mockResolvedValue()
+      vi.spyOn(manifestStabilityUtils, 'checkPodStatus').mockResolvedValue()
      // Simulate a LoadBalancer service that already has an external IP
      const stableService = {
         spec: {type: 'LoadBalancer'},
         status: {loadBalancer: {ingress: [{ip: '1.2.3.4'}]}}
      }
-      jest.spyOn(kc, 'getResource').mockResolvedValue({
+      vi.spyOn(kc, 'getResource').mockResolvedValue({
         stdout: JSON.stringify(stableService),
         stderr: '',
         exitCode: 0
      })
      // Provide a describe result to avoid warnings
-      jest.spyOn(kc, 'describe').mockResolvedValue({
+      vi.spyOn(kc, 'describe').mockResolvedValue({
         stdout: 'describe output stable',
         stderr: '',
         exitCode: 0
@@ -1,10 +1,10 @@
 import * as core from '@actions/core'
-import * as KubernetesConstants from '../types/kubernetesTypes'
-import {Kubectl, Resource} from '../types/kubectl'
-import {checkForErrors} from './kubectlUtils'
-import {sleep} from './timeUtils'
-import {ResourceTypeFleet} from '../actions/deploy'
-import {ClusterType} from '../inputUtils'
+import * as KubernetesConstants from '../types/kubernetesTypes.js'
+import {Kubectl, Resource} from '../types/kubectl.js'
+import {checkForErrors} from './kubectlUtils.js'
+import {sleep} from './timeUtils.js'
+import {ResourceTypeFleet} from '../actions/deploy.js'
+import {ClusterType} from '../inputUtils.js'

 const IS_SILENT = false
 const POD = 'pod'
@@ -46,7 +46,7 @@ export async function checkManifestStability(
            )
            checkForErrors([result])
         } catch (ex) {
-            const errorMessage = `Rollout failed for ${resource.type}/${resource.name} in namespace ${resource.namespace}: ${ex.message || ex}`
+            const errorMessage = `Rollout failed for ${resource.type}/${resource.name} in namespace ${kubectl.getNamespace(resource.namespace)}: ${ex.message || ex}`
            core.error(errorMessage)
            rolloutErrors.push(errorMessage)

@@ -106,7 +106,7 @@ export async function checkManifestStability(
               }
            }
         } catch (ex) {
-            const errorMessage = `Could not determine service status of: ${resource.name} in namespace ${resource.namespace}. Error: ${ex.message || ex}`
+            const errorMessage = `Could not determine service status of: ${resource.name} in namespace ${kubectl.getNamespace(resource.namespace)}. Error: ${ex.message || ex}`
            core.warning(errorMessage)

            try {
@@ -1,14 +1,17 @@
-import * as fileUtils from './fileUtils'
-import * as manifestUpdateUtils from './manifestUpdateUtils'
+import {vi} from 'vitest'
+vi.mock('fs')
+
+import * as fileUtils from './fileUtils.js'
+import * as manifestUpdateUtils from './manifestUpdateUtils.js'
 import * as path from 'path'
 import * as fs from 'fs'

 describe('manifestUpdateUtils', () => {
-   jest.spyOn(fileUtils, 'moveFileToTmpDir').mockImplementation((filename) => {
+   vi.spyOn(fileUtils, 'moveFileToTmpDir').mockImplementation((filename) => {
      return path.join('/tmp', filename)
   })
-   jest.spyOn(fs, 'writeFileSync').mockImplementation(() => {})
-   jest.spyOn(fs, 'readFileSync').mockImplementation((filename) => {
+   vi.spyOn(fs, 'writeFileSync').mockImplementation(() => {})
+   vi.spyOn(fs, 'readFileSync').mockImplementation((filename) => {
      return 'test contents'
   })

@@ -2,25 +2,25 @@ import * as core from '@actions/core'
 import * as fs from 'fs'
 import * as yaml from 'js-yaml'
 import * as path from 'path'
-import * as fileHelper from './fileUtils'
-import {moveFileToTmpDir} from './fileUtils'
+import * as fileHelper from './fileUtils.js'
+import {moveFileToTmpDir} from './fileUtils.js'
 import {
   InputObjectKindNotDefinedError,
   InputObjectMetadataNotDefinedError,
   isWorkloadEntity,
   KubernetesWorkload,
   NullInputObjectError
-} from '../types/kubernetesTypes'
+} from '../types/kubernetesTypes.js'
 import {
   getSpecSelectorLabels,
   setSpecSelectorLabels
-} from './manifestSpecLabelUtils'
+} from './manifestSpecLabelUtils.js'
 import {
   getImagePullSecrets,
   setImagePullSecrets
-} from './manifestPullSecretUtils'
-import {Resource} from '../types/kubectl'
-import {K8sObject} from '../types/k8sObject'
+} from './manifestPullSecretUtils.js'
+import {Resource} from '../types/kubectl.js'
+import {K8sObject} from '../types/k8sObject.js'

 export function updateManifestFiles(manifestFilePaths: string[]) {
   if (manifestFilePaths?.length === 0) {
@@ -1,11 +1,12 @@
 import {
   getImagePullSecrets,
   setImagePullSecrets
-} from './manifestPullSecretUtils'
-import {updateSpecLabels} from './manifestSpecLabelUtils'
-import {getReplicaCount} from './manifestUpdateUtils'
+} from './manifestPullSecretUtils.js'
+import {updateSpecLabels} from './manifestSpecLabelUtils.js'
+import {getReplicaCount} from './manifestUpdateUtils.js'
 import * as yaml from 'js-yaml'
 import * as fs from 'fs'
+import {isWorkloadEntity, isDeploymentEntity} from '../types/kubernetesTypes.js'

 describe('ScaledJob Support', () => {
   let scaledJobObject: any
@@ -57,13 +58,11 @@ describe('ScaledJob Support', () => {

   describe('Workload Classification', () => {
      it('should classify ScaledJob as workload entity', () => {
-         const {isWorkloadEntity} = require('../types/kubernetesTypes')
         expect(isWorkloadEntity('ScaledJob')).toBe(true)
         expect(isWorkloadEntity('scaledjob')).toBe(true)
      })

      it('should not classify ScaledJob as deployment entity', () => {
-         const {isDeploymentEntity} = require('../types/kubernetesTypes')
         expect(isDeploymentEntity('scaledjob')).toBe(false)
         expect(isDeploymentEntity('ScaledJob')).toBe(false)
      })
@@ -1,4 +1,4 @@
-import {Kubectl} from '../types/kubectl'
+import {Kubectl} from '../types/kubectl.js'

 const trafficSplitAPIVersionPrefix = 'split.smi-spec.io'

@@ -2,7 +2,7 @@ import {
   cleanLabel,
   removeInvalidLabelCharacters,
   VALID_LABEL_REGEX
-} from '../utilities/workflowAnnotationUtils'
+} from '../utilities/workflowAnnotationUtils.js'

 describe('WorkflowAnnotationUtils', () => {
   describe('cleanLabel', () => {
@@ -1,4 +1,4 @@
-import {DeploymentConfig} from '../types/deploymentConfig'
+import {DeploymentConfig} from '../types/deploymentConfig.js'

 const ANNOTATION_PREFIX = 'actions.github.com'

@@ -1,8 +1,15 @@
 {
   "compilerOptions": {
-      "target": "ES6",
-      "module": "commonjs",
-      "esModuleInterop": true
+      "target": "ES2020",
+      "module": "NodeNext",
+      "moduleResolution": "NodeNext",
+      "types": ["vitest/globals"],
+      "esModuleInterop": true,
+      "strict": false,
+      "skipLibCheck": true,
+      "resolveJsonModule": true,
+      "declaration": false,
+      "sourceMap": true
   },
-   "exclude": ["node_modules", "test", "src/**/*.test.ts"]
+   "exclude": ["node_modules", "test", "lib"]
 }
@@ -0,0 +1,11 @@
+import {defineConfig} from 'vitest/config'
+
+export default defineConfig({
+   test: {
+      globals: true,
+      environment: 'node',
+      include: ['**/*.test.ts'],
+      testTimeout: 9000,
+      clearMocks: true
+   }
+})