Add jest and config

.github/workflows/test.yaml

@@ -0,0 +1,42 @@
+name: Test
+
+on:
+    push:
+        branches:
+            - master
+    pull_request:
+        branches:
+            - master
+
+jobs:
+    jest:
+        name: Jest
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Checkout
+              uses: actions/checkout@2
+
+            - name: Setup node env
+              uses: actions/setup-node@v2.1.2
+              with:
+                  node-version: 14
+
+            - name: Get yarn cache directory path
+              id: yarn-cache-dir-path
+              run: echo "::set-output name=dir::$(yarn cache dir)"
+
+            - name: Cache node_modules
+              uses: actions/cache@v2
+              id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
+              with:
+                  path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+                  key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+                  restore-keys: |
+                      ${{ runner.os }}-yarn-
+
+            - name: Install dependencies
+              run: yarn install --frozen-lockfile
+
+            - name: Run tests
+              run: yarn run test

jest.config.js

@@ -0,0 +1,4 @@
+module.exports = {
+    preset: 'ts-jest',
+    testEnvironment: 'node'
+};

package.json

@@ -19,10 +19,13 @@
         "build:production": "webpack --config webpack.config.js --mode=production",
         "build:development": "webpack --config webpack.config.js --mode=development",
         "prettier": "prettier --check ./src/",
-        "lint": "eslint ./src/"
+        "lint": "eslint ./src/",
+        "pretest": "eslint ./src/",
+        "test": "jest --passWithNoTests"
     },
     "devDependencies": {
         "@types/chromecast-caf-receiver": "^5.0.12",
+        "@types/jest": "^26.0.19",
         "@typescript-eslint/eslint-plugin": "^4.6.0",
         "@typescript-eslint/parser": "^4.6.0",
         "clean-webpack-plugin": "^3.0.0",
@@ -34,10 +37,12 @@
         "html-loader": "^1.3.2",
         "html-webpack-plugin": "^4.5.0",
         "husky": "^4.3.0",
+        "jest": "^26.6.3",
         "prettier": "^2.2.1",
         "pretty-quick": "^3.1.0",
         "source-map-loader": "^1.1.2",
         "style-loader": "^2.0.0",
+        "ts-jest": "^26.4.4",
         "ts-loader": "^8.0.7",
         "typescript": "^4.0.5",
         "url-loader": "^4.1.1",