Refactor function to class, add tests

Author: pichfl

.eslintrc.js

@@ -2,12 +2,17 @@ module.exports = {
   env: {
     browser: true,
   },
-  plugins: ['prettier', 'unicorn'],
-  extends: ['eslint:recommended', 'plugin:prettier/recommended', 'plugin:unicorn/recommended'],
+  plugins: ['prettier', 'unicorn', 'jest'],
+  extends: [
+    'eslint:recommended',
+    'plugin:prettier/recommended',
+    'plugin:unicorn/recommended',
+    'plugin:jest/recommended',
+  ],
 
   overrides: [
     {
-      files: ['.eslintrc.js'],
+      files: ['.eslintrc.js', 'jest.config.js', 'jest.setup.js'],
       env: {
         browser: false,
         node: true,
@@ -16,5 +21,11 @@ module.exports = {
         'unicorn/prefer-module': 'off',
       },
     },
+    {
+      files: ['tests/**/*'],
+      env: {
+        jest: true,
+      },
+    },
   ],
 };

.github/workflows/ci.yml

@@ -21,7 +21,22 @@ jobs:
           version: ${{ env.PNPM_VERSION }}
       - uses: actions/setup-node@v2
         with:
-          node-version: 14.x
+          node-version: 16.x
           cache: pnpm
       - run: pnpm install
       - run: pnpm run lint
+        
+  test:
+    name: Testing
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: pnpm/action-setup@v2.0.1
+        with:
+          version: ${{ env.PNPM_VERSION }}
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 16.x
+          cache: pnpm
+      - run: pnpm install
+      - run: pnpm run test

jest.config.js

@@ -0,0 +1,29 @@
+/*
+ * For a detailed explanation regarding each configuration property, visit:
+ * https://jestjs.io/docs/configuration
+ */
+
+const { defaults } = require('jest-config');
+const crypto = require('crypto');
+const { TextEncoder } = require('util');
+
+module.exports = {
+  clearMocks: true,
+  collectCoverage: false,
+  globals: {
+    ...defaults.globals,
+    crypto: {
+      subtle: {
+        digest: crypto.webcrypto.subtle.digest,
+      },
+    },
+    TextEncoder,
+  },
+  moduleFileExtensions: ['mjs', 'js', 'json'],
+  preset: 'rollup-jest',
+  setupFiles: ['./jest.setup.js'],
+  testEnvironment: 'jsdom',
+  testPathIgnorePatterns: ['/node_modules/'],
+  testRegex: '((\\.|/)(test|spec))\\.(mjs?|js?|tsx?|ts?)$',
+  transformIgnorePatterns: ['\\.pnp\\.[^\\/]+$'],
+};

jest.setup.js

@@ -0,0 +1,3 @@
+const jestFetchMock = require('jest-fetch-mock');
+
+jestFetchMock.enableMocks();

package.json

@@ -3,14 +3,15 @@
   "version": "0.1.0",
   "description": "JavaScript package to send TelemetryDeck signals",
   "main": "dist/telemetrydeck.js",
-  "module": "src/telemetrydeck.js",
+  "module": "src/telemetrydeck.mjs",
   "scripts": {
     "build": "rollup -c",
     "changelog": "lerna-changelog",
     "lint": "eslint . --cache",
     "lint:fix": "eslint . --fix",
     "release": "release-it",
-    "test": "echo \"Error: no test specified yet\" && exit 1"
+    "test": "jest",
+    "test:watch": "jest --watch"
   },
   "repository": {
     "type": "git",
@@ -35,13 +36,18 @@
     "@rollup/plugin-json": "^4.1.0",
     "eslint": "^8.6.0",
     "eslint-config-prettier": "^8.3.0",
+    "eslint-plugin-jest": "^25.3.4",
     "eslint-plugin-prettier": "^4.0.0",
     "eslint-plugin-unicorn": "^40.0.0",
+    "jest": "^27.4.7",
+    "jest-fetch-mock": "^3.0.3",
     "lerna-changelog": "^2.2.0",
     "prettier": "^2.5.1",
     "release-it": "^14.12.1",
     "release-it-lerna-changelog": "^4.0.1",
     "rollup": "^2.63.0",
-    "rollup-plugin-terser": "^7.0.2"
+    "rollup-jest": "^1.1.3",
+    "rollup-plugin-terser": "^7.0.2",
+    "typescript": "^4.5.4"
   }
 }