Add Vitest config, exclude build path

fixes #63

Author: jsynowiec

__tests__/vitest.config.ts

@@ -0,0 +1,11 @@
+import { configDefaults, coverageConfigDefaults, defineConfig } from 'vitest/config'
+
+export default defineConfig({
+  test: {
+    exclude: [...configDefaults.exclude, 'build/**/*'],
+    coverage: {
+      provider: 'v8',
+      exclude: [...coverageConfigDefaults.exclude, 'build/**/*']
+    },
+  },
+})

package.json

@@ -31,8 +31,8 @@
     "build:watch": "tsc -w -p tsconfig.json",
     "build:release": "npm run clean && tsc -p tsconfig.release.json",
     "lint": "eslint .",
-    "test": "vitest run unit",
-    "test:coverage": "vitest run unit --coverage.enabled --coverage.all",
+    "test": "vitest run unit --config __tests__/vitest.config.ts",
+    "test:coverage": "vitest run unit --config __tests__/vitest.config.ts --coverage.enabled --coverage.all",
     "prettier": "prettier \"{src,__{tests}__}/**/*.{ts,mts}\" --config .prettierrc --write",
     "prettier:check": "prettier \"{src,__{tests}__}/**/*.{ts,mts}\" --config .prettierrc --check",
     "test:watch": "vitest unit"