[add] Test scripts & configuration based on Jest

Author: TechQuery

.gitignore

@@ -3,4 +3,5 @@ package-lock.json
 yarn.lock
 .parcel-cache/
 dist/
-docs/
+docs/
+.vscode/settings.json

.npmignore

@@ -1,4 +1,6 @@
 .parcel-cache/
+test/
 docs/
 .husky/
-.github/
+.github/
+.vscode/

.vscode/launch.json

@@ -0,0 +1,18 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Debug Jest",
+            "type": "node",
+            "request": "launch",
+            "port": 9229,
+            "runtimeArgs": [
+                "--inspect-brk",
+                "${workspaceRoot}/node_modules/jest/bin/jest.js",
+                "--runInBand"
+            ],
+            "console": "integratedTerminal",
+            "internalConsoleOptions": "neverOpen"
+        }
+    ]
+}

package.json

@@ -1,6 +1,6 @@
 {
     "name": "dom-renderer",
-    "version": "2.0.0-alpha.0",
+    "version": "2.0.0-alpha.1",
     "license": "LGPL-3.0-or-later",
     "author": "[email protected]",
     "description": "A light-weight DOM Renderer supports Web components standard & TypeScript language",
@@ -31,11 +31,16 @@
     "devDependencies": {
         "@parcel/packager-ts": "~2.8.3",
         "@parcel/transformer-typescript-types": "~2.8.3",
+        "@types/jest": "^29.5.3",
+        "@types/node": "^18.17.1",
         "husky": "^8.0.3",
+        "jest": "^29.6.2",
+        "jest-environment-jsdom": "^29.6.2",
         "lint-staged": "^13.2.3",
         "open-cli": "^7.2.0",
         "parcel": "~2.8.3",
         "prettier": "^3.0.0",
+        "ts-jest": "^29.1.1",
         "typedoc": "^0.24.8",
         "typedoc-plugin-mdn-links": "^3.0.3",
         "typescript": "~5.1.6"
@@ -49,6 +54,10 @@
     "lint-staged": {
         "*.{md,json,yml,ts}": "prettier --write"
     },
+    "jest": {
+        "preset": "ts-jest",
+        "testEnvironment": "jsdom"
+    },
     "browserslist": "> 0.5%, last 2 versions, not dead, IE 11",
     "targets": {
         "main": {
@@ -57,7 +66,7 @@
     },
     "scripts": {
         "prepare": "husky install",
-        "test": "lint-staged",
+        "test": "lint-staged  &&  jest",
         "build": "rm -rf dist/ docs/  &&  typedoc source/  &&  parcel build",
         "start": "typedoc source/  &&  open-cli docs/index.html",
         "prepublishOnly": "npm test  &&  npm run build"