fix(tegg-vitest): reuse runner module graph for prototypes

tegg/core/loader/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@eggjs/tegg-loader",
-  "version": "4.0.2-beta.20",
+  "version": "4.0.2-beta.21",
   "description": "tegg default loader implement",
   "keywords": [
     "egg",

tegg/core/vitest/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@eggjs/tegg-vitest",
-  "version": "4.0.2-beta.20",
+  "version": "4.0.2-beta.21",
   "description": "Vitest adapter for tegg context injection",
   "keywords": [
     "adapter",

tegg/core/vitest/src/runner.ts

@@ -87,6 +87,12 @@ export default class TeggVitestRunner extends VitestTestRunner {
 
   constructor(config: ConstructorParameters<typeof VitestTestRunner>[0]) {
     super(config);
+    // TEGG discovers prototype files while the Egg app is booting. Route those
+    // imports through Vitest's module graph so application loading and test
+    // imports resolve to the same class instances.
+    // `setup` imports intentionally invalidate Vitest's module cache. Use the
+    // regular collection path here so an already imported prototype is reused.
+    globalThis.__EGG_MODULE_IMPORTER__ = async (filepath: string) => super.importFile(filepath, 'collect');
     // When isolate: false, all test files share the same worker and module cache.
     // The app must not be closed between files — only after all files finish.
     this.sharedMode = !config.isolate;

tegg/core/vitest/test/fixture_app.test.ts

@@ -33,6 +33,11 @@ describe('fixture demo app', () => {
   });
 
   it('injects ctx and getEggObject', async () => {
+    const loadedModule = (await globalThis.__EGG_MODULE_IMPORTER__?.(
+      path.join(__dirname, 'fixtures/apps/demo-app/modules/demo-module/HelloService.ts'),
+    )) as { HelloService: typeof HelloService };
+    assert.strictEqual(loadedModule.HelloService, HelloService);
+
     const ctx = app.ctxStorage.getStore();
     assert(ctx);
     const helloService = (await ctx.getEggObject(HelloService)) as any;