mode_edit codeAPI / @angular/platform-browser/testingBrowserTestingModulelinkclass 稳定NgModule for testing.class BrowserTestingModule { }注解link@NgModule({ exports: [BrowserModule], providers: [ { provide: APP_ID, useValue: 'a' }, ELEMENT_PROBE_PROVIDERS, { provide: NgZone, useFactory: createNgZone }, ] })