Add tests

Author: skirtles-code

package.json

@@ -31,14 +31,19 @@
     "@types/jsdom": "^20.0.0",
     "@types/node": "^18.8.1",
     "@vitejs/plugin-vue": "^3.1.2",
+    "@vitest/coverage-c8": "^0.24.0",
     "@vue/tsconfig": "^0.1.3",
+    "jsdom": "^20.0.1",
     "typescript": "^4.8.4",
     "vite": "^3.1.4",
     "vite-plugin-dts": "^1.6.4",
+    "vitest": "^0.24.0",
     "vue": "^3.2.0",
     "vue-tsc": "^0.40.13"
   },
   "scripts": {
+    "test:unit": "vitest --environment jsdom",
+    "coverage": "vitest run --coverage --environment jsdom",
     "build": "pnpm build-dev && pnpm build-neutral && pnpm build-prod && pnpm type-check",
     "build-dev": "vite build --mode development",
     "build-neutral": "vite build --mode neutral",