如何提供不同的模拟服务来测试Angular 2组件?
我有两个模拟服务:如何提供不同的模拟服务来测试Angular 2组件?,angular,typescript,jasmine,Angular,Typescript,Jasmine,我有两个模拟服务: @Injectable() class UserRegistrationServiceMock { registerBasicDetails(details: UserRegistrationDetails) { let response: UserRegistrationResponse = new UserRegistrationResponse(); response.success = false; respon
@Injectable()
class UserRegistrationServiceMock {
registerBasicDetails(details: UserRegistrationDetails) {
let response: UserRegistrationResponse = new UserRegistrationResponse();
response.success = false;
response.userMessage = 'Test Message';
return Observable.of(response);
}
registerAdvancedDetails() {
}
}
@Injectable()
class UserRegistrationServiceSuccessMock {
registerBasicDetails(details: UserRegistrationDetails) {
let response: UserRegistrationResponse = new UserRegistrationResponse();
response.success = true;
response.userMessage = 'Test Message';
return Observable.of(response);
}
registerAdvancedDetails() {
}
}
在我的茉莉花测试中,我在“BeforeAchProviders”和“BeforeAch”方法中提供了它的定义:
然后在实际测试中,我可以参考用户注册服务来初始化组件:
it('should create an instance', () => {
let component: BasicRegistrationComponent =
new BasicRegistrationComponent(null, formBuilder, promptWindow, userInfo, translator, userRegistration);
expect(component).toBeTruthy();
});
这里的问题是,我如何为我的组件提供服务的第二个模拟实现?您提供第二个模拟类的方式与提供第一个模拟类的方式相同 将其包含在每个提供程序()之前的
和每个提供程序之前的中
beforeEachProviders(() => [
provide(UserRegistrationService, { useClass: UserRegistrationServiceMock }),
provide(UserRegistrationServiceSuccess, { useClass: UserRegistrationServiceSuccessMock })
]);
beforeEach(inject([UserRegistrationService, UserRegistrationServiceSuccess], (_userRegistration, _userSuccess))
作为提示,我建议只注入每个测试所需的内容,而不是将所有依赖项注入每个测试。(除非该文件中只有一个测试)。在每个提供程序之前保留,但不要在每个提供程序之前使用,而是在组件测试中执行以下操作:
it("should create an instance", inject([UserRegistrationService, UserRegistrationServiceSuccess], (_userRegistration : UserRegistrationServiceMock, _userSuccess : UserRegistrationServiceSuccessMock) => {
let component: BasicRegistrationComponent =
new BasicRegistrationComponent(null, formBuilder, promptWindow, userInfo, translator, userRegistration);
expect(component).toBeTruthy();
}));
此外,如果您使用的是模拟服务,您应该像上面那样引用它们:
\u userRegistration:userRegistrationServiceLock
。基本上,inject语句的意思是:当测试寻找UserRegistrationService
时,我传递它UserRegistrationServiceMock
,但我调用它\u userRegistration
。如果这样做没有帮助,请告诉我:)我发现最好、可读性最好的方法是嵌套一组额外的descripe语句:
describe('SomeComponent', () => {
describe("Normal Registration", () => {
beforeEachProviders(() => [
provide(UserRegistrationService, { useClass: UserRegistrationServiceMock })
]);
beforeEach(inject([UserRegistrationService], (_userRegistration))
it('should create an instance', () => {
let component: BasicRegistrationComponent =
new BasicRegistrationComponent(null, formBuilder, promptWindow, userInfo, translator, userRegistration);
expect(component).toBeTruthy();
});
});
describe("Registration Success", () => {
beforeEachProviders(() => [
provide(UserRegistrationService, { useClass: UserRegistrationServiceSuccessMock })
]);
beforeEach(inject([UserRegistrationService], (_userRegistration))
it('should create an instance', () => {
let component: BasicRegistrationComponent =
new BasicRegistrationComponent(null, formBuilder, promptWindow, userInfo, translator, userRegistration);
expect(component).toBeTruthy();
});
});
});
describe('SomeComponent', () => {
describe("Normal Registration", () => {
beforeEachProviders(() => [
provide(UserRegistrationService, { useClass: UserRegistrationServiceMock })
]);
beforeEach(inject([UserRegistrationService], (_userRegistration))
it('should create an instance', () => {
let component: BasicRegistrationComponent =
new BasicRegistrationComponent(null, formBuilder, promptWindow, userInfo, translator, userRegistration);
expect(component).toBeTruthy();
});
});
describe("Registration Success", () => {
beforeEachProviders(() => [
provide(UserRegistrationService, { useClass: UserRegistrationServiceSuccessMock })
]);
beforeEach(inject([UserRegistrationService], (_userRegistration))
it('should create an instance', () => {
let component: BasicRegistrationComponent =
new BasicRegistrationComponent(null, formBuilder, promptWindow, userInfo, translator, userRegistration);
expect(component).toBeTruthy();
});
});
});