Installing vitest with jsdom, setting up configuration

.gitignore

@@ -2,10 +2,11 @@
 .DS_Store
 node_modules
 /build
+/coverage
 /.svelte-kit
 /package
 .env
 .env.*
 !.env.example
 vite.config.js.timestamp-*
-vite.config.ts.timestamp-*
+vite.config.ts.timestamp-*

package.json

@@ -7,7 +7,9 @@
         "build:popup": "vite build",
         "build:extension": "node build-extension.js",
         "check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
-        "check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch"
+        "check:watch": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json --watch",
+        "test": "vitest run --coverage",
+        "test:watch": "vitest watch --coverage"
     },
     "devDependencies": {
         "@sveltejs/adapter-auto": "^4.0.0",
@@ -15,12 +17,15 @@
         "@sveltejs/kit": "^2.17.2",
         "@sveltejs/vite-plugin-svelte": "^5.0.3",
         "@types/chrome": "^0.0.304",
+        "@vitest/coverage-v8": "^3.0.6",
         "cheerio": "^1.0.0",
+        "jsdom": "^26.0.0",
         "sass": "^1.85.0",
         "svelte": "^5.20.1",
         "svelte-check": "^4.1.4",
         "typescript": "^5.7.3",
-        "vite": "^6.1.0"
+        "vite": "^6.1.0",
+        "vitest": "^3.0.6"
     },
     "type": "module",
     "dependencies": {

vite.config.ts

@@ -1,5 +1,5 @@
-import {sveltekit} from '@sveltejs/kit/vite';
-import {defineConfig} from 'vite';
+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vitest/config';
 
 export default defineConfig({
   build: {
@@ -9,4 +9,14 @@ export default defineConfig({
   plugins: [
     sveltekit(),
   ],
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    include: ['src/**/*.{js,ts}'],
+    exclude: ['**/node_modules/**', '.*\\.d\\.ts$', '.*\\.spec\\.ts$'],
+    coverage: {
+      reporter: ['text', 'html'],
+      include: ['src/**/*.{js,ts}'],
+    }
+  }
 });