Run tests in demo workspace

Author: wimpyprogrammer

demo/jest.config.js

@@ -0,0 +1,12 @@
+module.exports = {
+	restoreMocks: true,
+	globals: {
+		'ts-jest': {
+			isolatedModules: true,
+			tsconfig: 'tsconfig.test.json',
+		},
+	},
+	preset: 'ts-jest',
+	testEnvironment: 'node',
+	verbose: true,
+};

demo/package.json

@@ -4,9 +4,12 @@
   "private": true,
   "scripts": {
     "build": "wp --config webpack.config.js",
-    "test": "exit 0"
+    "test": "jest --coverage"
   },
   "devDependencies": {
+    "@types/jest": "^27.4.0",
+    "jest": "^27.5.1",
+    "ts-jest": "^27.1.3",
     "ts-loader": "^9.1.2",
     "typescript": "^4.1.3",
     "webpack": "^5.0.0",