feat(eslint): add vitest config (#96)

Author: mrmckeb

README.md

@@ -88,6 +88,7 @@ The following additional configs are available:
 - `@vercel/style-guide/eslint/playwright-test`
 - `@vercel/style-guide/eslint/react`
 - `@vercel/style-guide/eslint/typescript` (requires `typescript` to be installed and [additional configuration](#configuring-eslint-for-typescript))
+- `@vercel/style-guide/eslint/vitest`
 
 > You'll need to use `require.resolve` to provide ESLint with absolute paths,
 > due to an issue around ESLint config resolution (see

eslint/rules/vitest.js

@@ -0,0 +1,16 @@
+module.exports = {
+  rules: {
+    /**
+     * Disallow duplicate setup and teardown hooks.
+     *
+     * 🚫 Not fixable - https://github.com/veritem/eslint-plugin-vitest/blob/HEAD/docs/rules/no-duplicate-hooks.md
+     */
+    'vitest/no-duplicate-hooks': 'error',
+    /**
+     * Require lowercase test names.
+     *
+     * 🔧 Fixable - https://github.com/veritem/eslint-plugin-vitest/blob/HEAD/docs/rules/prefer-lowercase-title.md
+     */
+    'vitest/prefer-lowercase-title': 'warn',
+  },
+};

eslint/vitest.js

@@ -0,0 +1,3 @@
+module.exports = {
+  extends: ['plugin:vitest/recommended', require.resolve('./rules/vitest')],
+};

package.json

@@ -55,6 +55,7 @@
     "eslint-plugin-testing-library": "^6.0.1",
     "eslint-plugin-tsdoc": "^0.2.17",
     "eslint-plugin-unicorn": "^48.0.1",
+    "eslint-plugin-vitest": "^0.3.22",
     "prettier-plugin-packagejson": "^2.4.5"
   },
   "devDependencies": {