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..0d4440f3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -326,4 +326,4 @@ ASALocalRun/
 *.nvuser
 
 # MFractors (Xamarin productivity tool) working folder 
-.mfractor/
+.mfractor/
\ No newline at end of file
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..339501d2
--- /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()).resolves.not.toThrow();
+    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/constants.js b/lib/constants.js
index 4d3283c2..50919389 100644
--- a/lib/constants.js
+++ b/lib/constants.js
@@ -2,6 +2,7 @@
 Object.defineProperty(exports, "__esModule", { value: true });
 class KubernetesWorkload {
 }
+exports.KubernetesWorkload = KubernetesWorkload;
 KubernetesWorkload.pod = 'Pod';
 KubernetesWorkload.replicaset = 'Replicaset';
 KubernetesWorkload.deployment = 'Deployment';
@@ -9,18 +10,17 @@ KubernetesWorkload.statefulSet = 'StatefulSet';
 KubernetesWorkload.daemonSet = 'DaemonSet';
 KubernetesWorkload.job = 'job';
 KubernetesWorkload.cronjob = 'cronjob';
-exports.KubernetesWorkload = KubernetesWorkload;
 class DiscoveryAndLoadBalancerResource {
 }
+exports.DiscoveryAndLoadBalancerResource = DiscoveryAndLoadBalancerResource;
 DiscoveryAndLoadBalancerResource.service = 'service';
 DiscoveryAndLoadBalancerResource.ingress = 'ingress';
-exports.DiscoveryAndLoadBalancerResource = DiscoveryAndLoadBalancerResource;
 class ServiceTypes {
 }
+exports.ServiceTypes = ServiceTypes;
 ServiceTypes.loadBalancer = 'LoadBalancer';
 ServiceTypes.nodePort = 'NodePort';
 ServiceTypes.clusterIP = 'ClusterIP';
-exports.ServiceTypes = ServiceTypes;
 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/run.js b/lib/run.js
index af12fe7a..369a0efd 100644
--- a/lib/run.js
+++ b/lib/run.js
@@ -9,16 +9,16 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-const toolCache = require("@actions/tool-cache");
 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* () {
@@ -62,6 +62,7 @@ function run() {
         let manifestsInput = core.getInput('manifests');
         if (!manifestsInput) {
             core.setFailed('No manifests supplied to deploy');
+            return;
         }
         let namespace = core.getInput('namespace');
         if (!namespace) {
@@ -85,4 +86,5 @@ function run() {
         }
     });
 }
+exports.run = run;
 run().catch(core.setFailed);
diff --git a/lib/utilities/kubectl-util.js b/lib/utilities/kubectl-util.js
index ca9ee6a6..3015e91c 100644
--- a/lib/utilities/kubectl-util.js
+++ b/lib/utilities/kubectl-util.js
@@ -9,12 +9,12 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
+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 +36,7 @@ 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/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..72b4ce1d 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 = "";
 
@@ -45,12 +46,13 @@ function checkClusterContext() {
     }
 }
 
-async function run() {
+export async function run() {
     checkClusterContext();
     await setKubectlPath();
     let manifestsInput = core.getInput('manifests');
     if (!manifestsInput) {
         core.setFailed('No manifests supplied to deploy');
+        return;
     }
     let namespace = core.getInput('namespace');
     if (!namespace) {
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