build(lint): add vitest eslint rules [AR-47371]

eslint.config.base.ts

@@ -5,6 +5,7 @@ import tseslint from 'typescript-eslint';
 import unicorn from 'eslint-plugin-unicorn';
 import importX, { createNodeResolver } from 'eslint-plugin-import-x';
 import { createTypeScriptImportResolver } from 'eslint-import-resolver-typescript';
+import vitest from '@vitest/eslint-plugin';
 import globals from 'globals';
 
 export default defineConfig(
@@ -128,5 +129,45 @@ export default defineConfig(
 		},
 	},
 
+	// Test rules.
+	{
+		files: ['**/*.@(test|spec).[tj]s?(x)'],
+		...vitest.configs.recommended,
+		rules: {
+			...vitest.configs.recommended.rules,
+			'vitest/prefer-vi-mocked': 'error',
+			'vitest/prefer-hooks-on-top': 'error',
+			'vitest/no-duplicate-hooks': 'error',
+			'vitest/hoisted-apis-on-top': 'error',
+
+			'vitest/consistent-each-for': [
+				'error',
+				{
+					test: 'each',
+					it: 'each',
+					describe: 'each',
+					suite: 'each',
+				},
+			],
+
+			'vitest/consistent-test-filename': [
+				'error',
+				{
+					pattern: '\\.test\\.[tj]sx?$',
+				},
+			],
+
+			'vitest/consistent-test-it': [
+				'error',
+				{
+					fn: 'it',
+					withinDescribe: 'it',
+				},
+			],
+
+			'vitest/prefer-hooks-in-order': 'error',
+		},
+	},
+
 	globalIgnores(['**/dist', '**/.turbo']),
 );

package.json

@@ -32,6 +32,7 @@
 		"@eslint/core": "^1.1.0",
 		"@eslint/js": "^9.39.2",
 		"@types/node": "^25.2.2",
+		"@vitest/eslint-plugin": "^1.6.7",
 		"cspell": "^9.6.4",
 		"eslint": "^9.39.2",
 		"eslint-import-resolver-typescript": "^4.4.4",

packages/design-system/tests/exports.test.ts

@@ -12,12 +12,14 @@ describe('Design System exports', () => {
 	const actualContent = fs.readFileSync('./src/index.ts', 'utf-8');
 	const actualLines = actualContent.split('\n').filter((line) => line.trim().length > 0);
 
-	expect(actualLines.length).toBe(expectedLines.length);
-
 	const tests = expectedLines.map((expectedLine, index) => {
 		return [actualLines[index], expectedLine];
 	});
 
+	it('should export all components', () => {
+		expect(actualLines.length).toBe(expectedLines.length);
+	});
+
 	// split expected by line and assert that each line is exported
 	it.each(tests)('"%s" is exported from the package', (actual, expected) => {
 		expect(actual).toBe(expected);