test: use configureVitest hook in async plugin factory snap test

Author: fengmk2

packages/cli/snap-tests/vite-plugins-async-test/my-vitest-plugin.ts

@@ -1,14 +1,14 @@
+import fs from 'node:fs';
+import path from 'node:path';
+
 export default function myVitestPlugin() {
   return {
     name: 'my-vitest-plugin',
-    config() {
-      return {
-        test: {
-          env: {
-            MY_VITEST_PLUGIN_LOADED: '1',
-          },
-        },
-      };
+    configureVitest() {
+      fs.writeFileSync(
+        path.join(import.meta.dirname, '.vitest-plugin-loaded'),
+        'configureVitest hook executed',
+      );
     },
   };
 }

packages/cli/snap-tests/vite-plugins-async-test/src/index.test.ts

@@ -1,5 +1,11 @@
+import fs from 'node:fs';
+import path from 'node:path';
+
 import { expect, test } from '@voidzero-dev/vite-plus-test';
 
-test('async plugin factory should load vitest plugin', () => {
-  expect(process.env.MY_VITEST_PLUGIN_LOADED).toBe('1');
+test('async plugin factory should load vitest plugin with configureVitest hook', () => {
+  const markerPath = path.join(import.meta.dirname, '..', '.vitest-plugin-loaded');
+  expect(fs.existsSync(markerPath)).toBe(true);
+  expect(fs.readFileSync(markerPath, 'utf-8')).toBe('configureVitest hook executed');
+  fs.unlinkSync(markerPath);
 });