单元测试代码:
describe('MasterService with Angular jasmine.createSpyObj', () => { let masterService: MasterService; let valueServiceSpy: jasmine.SpyObj<ValueService>; beforeEach(() => { const spy = jasmine.createSpyObj('ValueService', ['getValue']); TestBed.configureTestingModule({ // Provide both the service-to-test and its (spy) dependency providers: [ MasterService, { provide: ValueService, useValue: spy }] }); // Inject both the service-to-test and its (spy) dependency masterService = TestBed.inject(MasterService); valueServiceSpy = TestBed.inject(ValueService) as jasmine.SpyObj<ValueService>; }); it('#getValue should return stubbed value from a spy', () => { const stubValue = 'stub value'; valueServiceSpy.getValue.and.returnValue(stubValue); expect(masterService.getValue()) .toBe(stubValue, 'service returned stub value'); expect(valueServiceSpy.getValue.calls.count()) .toBe(1, 'spy method was called once'); expect(valueServiceSpy.getValue.calls.mostRecent().returnValue) .toBe(stubValue); }); });