diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 00000000..21217c77
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,20 @@
+name: "build-test"
+on: # rebuild any PRs and main branch changes
+  pull_request:
+    branches:
+      - master
+      - 'releases/*'
+  push:
+    branches:
+      - master
+      - 'releases/*'
+
+jobs:
+  build: # make sure build/ci works properly
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - run: |
+        npm install
+        npm build
+        npm test
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index ddea9084..d109d827 100644
--- a/.gitignore
+++ b/.gitignore
@@ -327,3 +327,4 @@ ASALocalRun/
 
 # MFractors (Xamarin productivity tool) working folder 
 .mfractor/
+node_modules
diff --git a/__tests__/manifests/deployment.yml b/__tests__/manifests/deployment.yml
new file mode 100644
index 00000000..791154a2
--- /dev/null
+++ b/__tests__/manifests/deployment.yml
@@ -0,0 +1,16 @@
+apiVersion : apps/v1beta1
+kind: Deployment
+metadata:
+  name: testapp 
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: testapp 
+    spec:
+      containers:
+        - name: testapp 
+          image: testcr.azurecr.io/testapp
+          ports:
+          - containerPort: 80
\ No newline at end of file
diff --git a/__tests__/run.test.ts b/__tests__/run.test.ts
new file mode 100644
index 00000000..fcd2633b
--- /dev/null
+++ b/__tests__/run.test.ts
@@ -0,0 +1,196 @@
+import * as KubernetesManifestUtility from '../src/utilities/manifest-stability-utility';
+import * as KubernetesObjectUtility from '../src/utilities/resource-object-utility';
+import * as action from '../src/run';
+import * as core from '@actions/core';
+import * as deployment from '../src/utilities/strategy-helpers/deployment-helper';
+import * as fs from 'fs';
+import * as io from '@actions/io';
+import * as toolCache from '@actions/tool-cache';
+
+import { Kubectl, Resource } from '../src/kubectl-object-model';
+
+import { getkubectlDownloadURL } from "../src/utilities/kubectl-util";
+import { mocked } from 'ts-jest/utils';
+
+var path = require('path');
+
+const coreMock = mocked(core, true);
+const ioMock = mocked(io, true);
+
+const toolCacheMock = mocked(toolCache, true);
+const fileUtility = mocked(fs, true);
+
+const stableVersionUrl = 'https://storage.googleapis.com/kubernetes-release/release/stable.txt';
+
+var deploymentYaml = "";
+
+beforeAll(() => {
+    deploymentYaml = fs.readFileSync(path.join(__dirname, 'manifests', 'deployment.yml'), 'utf8');
+    process.env["KUBECONFIG"] = 'kubeConfig';
+})
+
+test("setKubectlPath() - install a particular version", async () => {
+    const kubectlVersion = 'v1.18.0'
+    //Mocks
+    coreMock.getInput = jest.fn().mockReturnValue(kubectlVersion);
+    toolCacheMock.find = jest.fn().mockReturnValue(undefined);
+    toolCacheMock.downloadTool = jest.fn().mockReturnValue('downloadpath');
+    toolCacheMock.cacheFile = jest.fn().mockReturnValue('cachepath');
+    fileUtility.chmodSync = jest.fn();
+
+    //Invoke and assert
+    await expect(action.run()).resolves.not.toThrow();
+    expect(toolCacheMock.find).toBeCalledWith('kubectl', kubectlVersion);
+    expect(toolCacheMock.downloadTool).toBeCalledWith(getkubectlDownloadURL(kubectlVersion));
+});
+
+test("setKubectlPath() - install a latest version", async () => {
+    const kubectlVersion = 'latest'
+    //Mocks
+    coreMock.getInput = jest.fn().mockReturnValue(kubectlVersion);
+    jest.spyOn(fs, 'readFileSync').mockImplementation(() => "");
+    toolCacheMock.find = jest.fn().mockReturnValue(undefined);
+    toolCacheMock.downloadTool = jest.fn().mockResolvedValue('');
+    toolCacheMock.cacheFile = jest.fn().mockReturnValue('cachepath');
+    fileUtility.chmodSync = jest.fn();
+
+    //Invoke and assert
+    await expect(action.run()).resolves.not.toThrow();
+    expect(toolCacheMock.find).toBeCalledWith('kubectl', kubectlVersion);
+    expect(toolCacheMock.downloadTool).toBeCalledWith(stableVersionUrl);
+
+});
+
+test("setKubectlPath() - kubectl version already avilable", async () => {
+    const kubectlVersion = 'v1.18.0'
+    //Mock
+    coreMock.getInput = jest.fn().mockReturnValue(kubectlVersion);
+    toolCacheMock.find = jest.fn().mockReturnValue('validPath');
+    toolCacheMock.downloadTool = jest.fn().mockReturnValue('downloadpath');
+    toolCacheMock.cacheFile = jest.fn().mockReturnValue('cachepath');
+    fileUtility.chmodSync = jest.fn();
+
+    //Invoke and assert
+    await expect(action.run()).resolves.not.toThrow();
+    expect(toolCacheMock.find).toBeCalledWith('kubectl', kubectlVersion);
+    expect(toolCacheMock.downloadTool).toBeCalledTimes(0);
+});
+
+test("setKubectlPath() - kubectl version not provided and kubectl avilable on machine", async () => {
+    //Mock
+    coreMock.getInput = jest.fn().mockReturnValue(undefined);
+    ioMock.which = jest.fn().mockReturnValue('validPath');
+
+    //Invoke and assert
+    await expect(action.run()).resolves.not.toThrow();
+    expect(ioMock.which).toBeCalledWith('kubectl', false);
+    expect(toolCacheMock.downloadTool).toBeCalledTimes(0);
+});
+
+test("setKubectlPath() - kubectl version not provided and kubectl not avilable on machine", async () => {
+    //Mock
+    coreMock.getInput = jest.fn().mockReturnValue(undefined);
+    ioMock.which = jest.fn().mockReturnValue(undefined);
+    toolCacheMock.findAllVersions = jest.fn().mockReturnValue(undefined);
+
+    //Invoke and assert
+    await expect(action.run()).rejects.toThrowError();
+    expect(ioMock.which).toBeCalledWith('kubectl', false);
+});
+
+test("run() - action not provided", async () => {
+    const kubectlVersion = 'v1.18.0'
+    coreMock.getInput = jest.fn().mockImplementation((name) => {
+        if (name == 'action') {
+            return undefined;
+        }
+        return kubectlVersion;
+    });
+    coreMock.setFailed = jest.fn();
+    //Mocks
+    toolCacheMock.find = jest.fn().mockReturnValue(undefined);
+    toolCacheMock.downloadTool = jest.fn().mockReturnValue('downloadpath');
+    toolCacheMock.cacheFile = jest.fn().mockReturnValue('cachepath');
+    fileUtility.chmodSync = jest.fn();
+
+    //Invoke and assert
+    await expect(action.run()).resolves.not.toThrow();
+    expect(coreMock.setFailed).toBeCalledWith('Not a valid action. The allowed actions are deploy, promote, reject');
+});
+
+test("run() - deploy - Manifiest not provided", async () => {
+    //Mocks
+    const kubectlVersion = 'v1.18.0'
+    coreMock.getInput = jest.fn().mockImplementation((name) => {
+        if (name == 'manifests') {
+            return undefined;
+        }
+        if (name == 'action') {
+            return 'deploy';
+        }
+        return kubectlVersion;
+    });
+    coreMock.setFailed = jest.fn();
+    toolCacheMock.find = jest.fn().mockReturnValue(undefined);
+    toolCacheMock.downloadTool = jest.fn().mockReturnValue('downloadpath');
+    toolCacheMock.cacheFile = jest.fn().mockReturnValue('cachepath');
+    fileUtility.chmodSync = jest.fn();
+
+    //Invoke and assert
+    await expect(action.run()).rejects.toThrowError();
+    expect(coreMock.setFailed).toBeCalledWith('No manifests supplied to deploy');
+});
+
+test("deployment - deploy() - Invokes with no manifestfiles", async () => {
+    const kubeCtl: jest.Mocked<Kubectl> = new Kubectl("") as any;
+
+    //Invoke and assert
+    await expect(deployment.deploy(kubeCtl, [], undefined)).rejects.toThrowError('ManifestFileNotFound');
+});
+
+test("run() - deploy", async () => {
+    const kubectlVersion = 'v1.18.0'
+    //Mocks
+    coreMock.getInput = jest.fn().mockImplementation((name) => {
+        if (name == 'manifests') {
+            return 'manifests/deployment.yaml';
+        }
+        if (name == 'action') {
+            return 'deploy';
+        }
+        if (name == 'strategy') {
+            return undefined;
+        }
+        return kubectlVersion;
+    });
+
+    coreMock.setFailed = jest.fn();
+    toolCacheMock.find = jest.fn().mockReturnValue('validPath');
+    toolCacheMock.downloadTool = jest.fn().mockReturnValue('downloadpath');
+    toolCacheMock.cacheFile = jest.fn().mockReturnValue('cachepath');
+    fileUtility.chmodSync = jest.fn();
+    const deploySpy = jest.spyOn(deployment, 'deploy').mockImplementation();
+
+    //Invoke and assert
+    await expect(action.run()).resolves.not.toThrow();
+    expect(deploySpy).toBeCalledWith({ "ignoreSSLErrors": false, "kubectlPath": 'validPath', "namespace": "v1.18.0" }, ['manifests/deployment.yaml'], undefined);
+    deploySpy.mockRestore();
+});
+
+test("deployment - deploy() - Invokes with manifestfiles", async () => {
+    const KubernetesManifestUtilityMock = mocked(KubernetesManifestUtility, true);
+    const KubernetesObjectUtilityMock = mocked(KubernetesObjectUtility, true);
+    const kubeCtl: jest.Mocked<Kubectl> = new Kubectl("") as any;
+    kubeCtl.apply = jest.fn().mockReturnValue("");
+    const resources: Resource[] = [{ type: "Deployment", name: "AppName" }];
+    KubernetesObjectUtilityMock.getResources = jest.fn().mockReturnValue(resources);
+    kubeCtl.getResource = jest.fn().mockReturnValue("");
+    KubernetesManifestUtilityMock.checkManifestStability = jest.fn().mockReturnValue("");
+
+    const readFileSpy = jest.spyOn(fs, 'readFileSync').mockImplementation(() => deploymentYaml);
+
+    //Invoke and assert
+    await expect(deployment.deploy(kubeCtl, ['manifests/deployment.yaml'], undefined)).resolves.not.toThrowError();
+    expect(readFileSpy).toBeCalledWith("manifests/deployment.yaml");
+    expect(kubeCtl.getResource).toBeCalledWith("ingress", "AppName");
+});
\ No newline at end of file
diff --git a/jest.config.js b/jest.config.js
new file mode 100644
index 00000000..45ff45ec
--- /dev/null
+++ b/jest.config.js
@@ -0,0 +1,10 @@
+module.exports = {
+    clearMocks: true,
+    moduleFileExtensions: ['js', 'ts'],
+    testEnvironment: 'node',
+    testMatch: ['**/*.test.ts'],
+    transform: {
+      '^.+\\.ts$': 'ts-jest'
+    },
+    verbose: true
+  }
\ No newline at end of file
diff --git a/lib/actions/promote.js b/lib/actions/promote.js
index 2bdf58c9..50e3fd05 100644
--- a/lib/actions/promote.js
+++ b/lib/actions/promote.js
@@ -9,6 +9,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.promote = void 0;
 const core = require("@actions/core");
 const deploymentHelper = require("../utilities/strategy-helpers/deployment-helper");
 const canaryDeploymentHelper = require("../utilities/strategy-helpers/canary-deployment-helper");
diff --git a/lib/actions/reject.js b/lib/actions/reject.js
index d3177ef6..cb0d73ee 100644
--- a/lib/actions/reject.js
+++ b/lib/actions/reject.js
@@ -9,6 +9,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.reject = void 0;
 const core = require("@actions/core");
 const canaryDeploymentHelper = require("../utilities/strategy-helpers/canary-deployment-helper");
 const SMICanaryDeploymentHelper = require("../utilities/strategy-helpers/smi-canary-deployment-helper");
diff --git a/lib/constants.js b/lib/constants.js
index 50919389..31ea7d3d 100644
--- a/lib/constants.js
+++ b/lib/constants.js
@@ -1,26 +1,36 @@
 'use strict';
 Object.defineProperty(exports, "__esModule", { value: true });
-class KubernetesWorkload {
-}
+exports.workloadTypesWithRolloutStatus = exports.workloadTypes = exports.deploymentTypes = exports.ServiceTypes = exports.DiscoveryAndLoadBalancerResource = exports.KubernetesWorkload = void 0;
+let KubernetesWorkload = /** @class */ (() => {
+    class KubernetesWorkload {
+    }
+    KubernetesWorkload.pod = 'Pod';
+    KubernetesWorkload.replicaset = 'Replicaset';
+    KubernetesWorkload.deployment = 'Deployment';
+    KubernetesWorkload.statefulSet = 'StatefulSet';
+    KubernetesWorkload.daemonSet = 'DaemonSet';
+    KubernetesWorkload.job = 'job';
+    KubernetesWorkload.cronjob = 'cronjob';
+    return KubernetesWorkload;
+})();
 exports.KubernetesWorkload = KubernetesWorkload;
-KubernetesWorkload.pod = 'Pod';
-KubernetesWorkload.replicaset = 'Replicaset';
-KubernetesWorkload.deployment = 'Deployment';
-KubernetesWorkload.statefulSet = 'StatefulSet';
-KubernetesWorkload.daemonSet = 'DaemonSet';
-KubernetesWorkload.job = 'job';
-KubernetesWorkload.cronjob = 'cronjob';
-class DiscoveryAndLoadBalancerResource {
-}
+let DiscoveryAndLoadBalancerResource = /** @class */ (() => {
+    class DiscoveryAndLoadBalancerResource {
+    }
+    DiscoveryAndLoadBalancerResource.service = 'service';
+    DiscoveryAndLoadBalancerResource.ingress = 'ingress';
+    return DiscoveryAndLoadBalancerResource;
+})();
 exports.DiscoveryAndLoadBalancerResource = DiscoveryAndLoadBalancerResource;
-DiscoveryAndLoadBalancerResource.service = 'service';
-DiscoveryAndLoadBalancerResource.ingress = 'ingress';
-class ServiceTypes {
-}
+let ServiceTypes = /** @class */ (() => {
+    class ServiceTypes {
+    }
+    ServiceTypes.loadBalancer = 'LoadBalancer';
+    ServiceTypes.nodePort = 'NodePort';
+    ServiceTypes.clusterIP = 'ClusterIP';
+    return ServiceTypes;
+})();
 exports.ServiceTypes = ServiceTypes;
-ServiceTypes.loadBalancer = 'LoadBalancer';
-ServiceTypes.nodePort = 'NodePort';
-ServiceTypes.clusterIP = 'ClusterIP';
 exports.deploymentTypes = ['deployment', 'replicaset', 'daemonset', 'pod', 'statefulset'];
 exports.workloadTypes = ['deployment', 'replicaset', 'daemonset', 'pod', 'statefulset', 'job', 'cronjob'];
 exports.workloadTypesWithRolloutStatus = ['deployment', 'daemonset', 'statefulset'];
diff --git a/lib/input-parameters.js b/lib/input-parameters.js
index 63869312..c4903363 100644
--- a/lib/input-parameters.js
+++ b/lib/input-parameters.js
@@ -1,5 +1,6 @@
 'use strict';
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.args = exports.baselineAndCanaryReplicas = exports.trafficSplitMethod = exports.deploymentStrategy = exports.canaryPercentage = exports.manifests = exports.imagePullSecrets = exports.containers = exports.namespace = void 0;
 const core = require("@actions/core");
 exports.namespace = core.getInput('namespace');
 exports.containers = core.getInput('images').split('\n');
diff --git a/lib/kubectl-object-model.js b/lib/kubectl-object-model.js
index 9effab10..e8687466 100644
--- a/lib/kubectl-object-model.js
+++ b/lib/kubectl-object-model.js
@@ -9,6 +9,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.Kubectl = void 0;
 const tool_runner_1 = require("./utilities/tool-runner");
 class Kubectl {
     constructor(kubectlPath, namespace, ignoreSSLErrors) {
diff --git a/lib/run.js b/lib/run.js
index af12fe7a..ebcb91e7 100644
--- a/lib/run.js
+++ b/lib/run.js
@@ -9,16 +9,17 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-const toolCache = require("@actions/tool-cache");
+exports.run = void 0;
 const core = require("@actions/core");
 const io = require("@actions/io");
 const path = require("path");
-const utility_1 = require("./utilities/utility");
+const toolCache = require("@actions/tool-cache");
 const kubectl_util_1 = require("./utilities/kubectl-util");
+const utility_1 = require("./utilities/utility");
+const kubectl_object_model_1 = require("./kubectl-object-model");
 const deployment_helper_1 = require("./utilities/strategy-helpers/deployment-helper");
 const promote_1 = require("./actions/promote");
 const reject_1 = require("./actions/reject");
-const kubectl_object_model_1 = require("./kubectl-object-model");
 let kubectlPath = "";
 function setKubectlPath() {
     return __awaiter(this, void 0, void 0, function* () {
@@ -68,7 +69,7 @@ function run() {
             namespace = 'default';
         }
         let action = core.getInput('action');
-        let manifests = manifestsInput.split('\n');
+        let manifests = manifestsInput ? manifestsInput.split('\n') : undefined;
         if (action === 'deploy') {
             let strategy = core.getInput('strategy');
             console.log("strategy: ", strategy);
@@ -85,4 +86,5 @@ function run() {
         }
     });
 }
+exports.run = run;
 run().catch(core.setFailed);
diff --git a/lib/utilities/files-helper.js b/lib/utilities/files-helper.js
index b7cd2754..4b9ecc81 100644
--- a/lib/utilities/files-helper.js
+++ b/lib/utilities/files-helper.js
@@ -1,5 +1,6 @@
 'use strict';
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.writeManifestToFile = exports.writeObjectsToFile = exports.assertFileExists = exports.ensureDirExists = exports.getNewUserDirPath = exports.getTempDirectory = void 0;
 const fs = require("fs");
 const path = require("path");
 const core = require("@actions/core");
diff --git a/lib/utilities/kubectl-util.js b/lib/utilities/kubectl-util.js
index 720f3589..a5bbcb63 100644
--- a/lib/utilities/kubectl-util.js
+++ b/lib/utilities/kubectl-util.js
@@ -9,12 +9,13 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.getTrafficSplitAPIVersion = exports.downloadKubectl = exports.getStableKubectlVersion = exports.getkubectlDownloadURL = void 0;
+const core = require("@actions/core");
+const fs = require("fs");
 const os = require("os");
 const path = require("path");
-const util = require("util");
-const fs = require("fs");
 const toolCache = require("@actions/tool-cache");
-const core = require("@actions/core");
+const util = require("util");
 const kubectlToolName = 'kubectl';
 const stableKubectlVersion = 'v1.15.0';
 const stableVersionUrl = 'https://storage.googleapis.com/kubernetes-release/release/stable.txt';
@@ -36,6 +37,7 @@ function getkubectlDownloadURL(version) {
             return util.format('https://storage.googleapis.com/kubernetes-release/release/%s/bin/windows/amd64/kubectl.exe', version);
     }
 }
+exports.getkubectlDownloadURL = getkubectlDownloadURL;
 function getStableKubectlVersion() {
     return __awaiter(this, void 0, void 0, function* () {
         return toolCache.downloadTool(stableVersionUrl).then((downloadPath) => {
diff --git a/lib/utilities/manifest-stability-utility.js b/lib/utilities/manifest-stability-utility.js
index c5cd5013..778219a7 100644
--- a/lib/utilities/manifest-stability-utility.js
+++ b/lib/utilities/manifest-stability-utility.js
@@ -9,6 +9,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.checkPodStatus = exports.checkManifestStability = void 0;
 const core = require("@actions/core");
 const utils = require("./utility");
 const KubernetesConstants = require("../constants");
diff --git a/lib/utilities/manifest-utilities.js b/lib/utilities/manifest-utilities.js
index 04f29ff8..0237cdc4 100644
--- a/lib/utilities/manifest-utilities.js
+++ b/lib/utilities/manifest-utilities.js
@@ -9,6 +9,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.isWorkloadEntity = exports.updateImagePullSecrets = exports.updateContainerImagesInManifestFiles = exports.substituteImageNameInSpecFile = exports.getDeleteCmdArgs = exports.createKubectlArgs = exports.getKubectl = exports.getManifestFiles = void 0;
 const core = require("@actions/core");
 const kubectlutility = require("./kubectl-util");
 const io = require("@actions/io");
diff --git a/lib/utilities/resource-object-utility.js b/lib/utilities/resource-object-utility.js
index 14c7f740..ebb7e564 100644
--- a/lib/utilities/resource-object-utility.js
+++ b/lib/utilities/resource-object-utility.js
@@ -1,5 +1,6 @@
 'use strict';
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.getResources = exports.updateSelectorLabels = exports.updateSpecLabels = exports.updateImageDetails = exports.updateImagePullSecrets = exports.updateObjectLabels = exports.getReplicaCount = exports.isServiceEntity = exports.isWorkloadEntity = exports.isDeploymentEntity = void 0;
 const fs = require("fs");
 const core = require("@actions/core");
 const yaml = require("js-yaml");
diff --git a/lib/utilities/strategy-helpers/canary-deployment-helper.js b/lib/utilities/strategy-helpers/canary-deployment-helper.js
index d8c5cb91..7df15ce1 100644
--- a/lib/utilities/strategy-helpers/canary-deployment-helper.js
+++ b/lib/utilities/strategy-helpers/canary-deployment-helper.js
@@ -1,5 +1,6 @@
 'use strict';
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.getStableResourceName = exports.getBaselineResourceName = exports.getCanaryResourceName = exports.isSMICanaryStrategy = exports.isCanaryDeploymentStrategy = exports.fetchResource = exports.fetchCanaryResource = exports.getNewCanaryResource = exports.getNewBaselineResource = exports.getStableResource = exports.isResourceMarkedAsStable = exports.markResourceAsStable = exports.deleteCanaryDeployment = exports.STABLE_LABEL_VALUE = exports.STABLE_SUFFIX = exports.CANARY_LABEL_VALUE = exports.BASELINE_LABEL_VALUE = exports.CANARY_VERSION_LABEL = exports.TRAFFIC_SPLIT_STRATEGY = exports.CANARY_DEPLOYMENT_STRATEGY = void 0;
 const fs = require("fs");
 const yaml = require("js-yaml");
 const core = require("@actions/core");
diff --git a/lib/utilities/strategy-helpers/deployment-helper.js b/lib/utilities/strategy-helpers/deployment-helper.js
index a880bd9c..a2e242cd 100644
--- a/lib/utilities/strategy-helpers/deployment-helper.js
+++ b/lib/utilities/strategy-helpers/deployment-helper.js
@@ -9,6 +9,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.deploy = void 0;
 const fs = require("fs");
 const core = require("@actions/core");
 const yaml = require("js-yaml");
diff --git a/lib/utilities/strategy-helpers/pod-canary-deployment-helper.js b/lib/utilities/strategy-helpers/pod-canary-deployment-helper.js
index 3a66581a..4e0ae883 100644
--- a/lib/utilities/strategy-helpers/pod-canary-deployment-helper.js
+++ b/lib/utilities/strategy-helpers/pod-canary-deployment-helper.js
@@ -1,5 +1,6 @@
 'use strict';
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.deployPodCanary = void 0;
 const core = require("@actions/core");
 const fs = require("fs");
 const yaml = require("js-yaml");
diff --git a/lib/utilities/strategy-helpers/smi-canary-deployment-helper.js b/lib/utilities/strategy-helpers/smi-canary-deployment-helper.js
index 4a871824..fd90abcb 100644
--- a/lib/utilities/strategy-helpers/smi-canary-deployment-helper.js
+++ b/lib/utilities/strategy-helpers/smi-canary-deployment-helper.js
@@ -1,5 +1,6 @@
 'use strict';
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.redirectTrafficToStableDeployment = exports.redirectTrafficToCanaryDeployment = exports.deploySMICanary = void 0;
 const core = require("@actions/core");
 const fs = require("fs");
 const yaml = require("js-yaml");
diff --git a/lib/utilities/string-comparison.js b/lib/utilities/string-comparison.js
index 5edaa9aa..9dd1b0a1 100644
--- a/lib/utilities/string-comparison.js
+++ b/lib/utilities/string-comparison.js
@@ -1,5 +1,6 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.isEqual = exports.StringComparer = void 0;
 var StringComparer;
 (function (StringComparer) {
     StringComparer[StringComparer["Ordinal"] = 0] = "Ordinal";
diff --git a/lib/utilities/tool-runner.js b/lib/utilities/tool-runner.js
index cd46a5f5..e1ea302e 100644
--- a/lib/utilities/tool-runner.js
+++ b/lib/utilities/tool-runner.js
@@ -1,5 +1,6 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.ToolRunner = void 0;
 const os = require("os");
 const events = require("events");
 const child = require("child_process");
diff --git a/lib/utilities/utility.js b/lib/utilities/utility.js
index 35b79737..db0543a5 100644
--- a/lib/utilities/utility.js
+++ b/lib/utilities/utility.js
@@ -1,5 +1,6 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.getCurrentTime = exports.getRandomInt = exports.sleep = exports.checkForErrors = exports.isEqual = exports.getExecutableExtension = void 0;
 const os = require("os");
 const core = require("@actions/core");
 function getExecutableExtension() {
diff --git a/package.json b/package.json
index 66d2abfa..66c46c66 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,8 @@
     "author": "Deepak Sattiraju",
     "license": "MIT",
     "scripts": {
-        "build": "tsc --outDir ./lib --rootDir ./src"
+        "build": "tsc --outDir ./lib --rootDir ./src",
+        "test": "jest"
     },
     "dependencies": {
         "@actions/tool-cache": "^1.0.0",
@@ -14,6 +15,10 @@
         "js-yaml": "3.13.1"
     },
     "devDependencies": {
-        "@types/node": "^12.0.10"
+        "@types/node": "^12.0.10",
+        "jest": "^25.0.0",
+        "@types/jest": "^25.2.2",
+        "ts-jest": "^25.5.1",
+        "typescript": "^3.9.2"
     }
 }
diff --git a/src/run.ts b/src/run.ts
index fbf5fe67..c36e5ba0 100644
--- a/src/run.ts
+++ b/src/run.ts
@@ -1,14 +1,15 @@
-import * as toolCache from '@actions/tool-cache';
 import * as core from '@actions/core';
 import * as io from '@actions/io';
 import * as path from 'path';
+import * as toolCache from '@actions/tool-cache';
 
-import { getExecutableExtension, isEqual } from "./utilities/utility";
 import { downloadKubectl, getStableKubectlVersion } from "./utilities/kubectl-util";
+import { getExecutableExtension, isEqual } from "./utilities/utility";
+
+import { Kubectl } from './kubectl-object-model';
 import { deploy } from './utilities/strategy-helpers/deployment-helper';
 import { promote } from './actions/promote';
 import { reject } from './actions/reject';
-import { Kubectl } from './kubectl-object-model';
 
 let kubectlPath = "";
 
@@ -45,7 +46,7 @@ function checkClusterContext() {
     }
 }
 
-async function run() {
+export async function run() {
     checkClusterContext();
     await setKubectlPath();
     let manifestsInput = core.getInput('manifests');
@@ -57,7 +58,7 @@ async function run() {
         namespace = 'default';
     }
     let action = core.getInput('action');
-    let manifests = manifestsInput.split('\n');
+    let manifests = manifestsInput ? manifestsInput.split('\n') : undefined;
 
     if (action === 'deploy') {
         let strategy = core.getInput('strategy');
diff --git a/src/utilities/kubectl-util.ts b/src/utilities/kubectl-util.ts
index 64a8ee71..11b202ec 100644
--- a/src/utilities/kubectl-util.ts
+++ b/src/utilities/kubectl-util.ts
@@ -1,10 +1,10 @@
+import * as core from '@actions/core';
+import * as fs from 'fs';
 import * as os from 'os';
 import * as path from 'path';
-import * as util from 'util';
-import * as fs from 'fs';
-
 import * as toolCache from '@actions/tool-cache';
-import * as core from '@actions/core';
+import * as util from 'util';
+
 import { Kubectl } from '../kubectl-object-model';
 
 const kubectlToolName = 'kubectl';
@@ -19,7 +19,7 @@ function getExecutableExtension(): string {
     return '';
 }
 
-function getkubectlDownloadURL(version: string): string {
+export function getkubectlDownloadURL(version: string): string {
     switch (os.type()) {
         case 'Linux':
             return util.format('https://storage.googleapis.com/kubernetes-release/release/%s/bin/linux/amd64/kubectl', version);
diff --git a/tsconfig.json b/tsconfig.json
index 7a5d8bef..3555b597 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -4,6 +4,7 @@
       "module": "commonjs"
   },
   "exclude": [
-      "node_modules"
+      "node_modules",
+      "__tests__"
   ]
 }
\ No newline at end of file