如何测试按钮标签内的routerLink angular2

Question

按钮看起来像这样

<button [routerLink]="['/account/recovery','identification']" class="btn btn-default">Back</button>

我想检查 url 是否在单击按钮后重定向到 /account/recovery/identification

如果是锚标签。我的问题是按钮标签。

我的测试规范如下所示。

beforeEach(async(() => {
        let ne = new NavigationEnd(0, "/account/recovery/otp", null);       // Create a mock instance for navigation end, utilized within OnInit()
        router = {
            navigate: jasmine.createSpy('navigate'),    // to spy on the url that has been routed
            events: new Observable(observer => {        // last router event that occurred
                observer.next(ne);
            }),

        };
        TestBed
            .configureTestingModule({
                imports: [CoreModule],
                declarations: [OtpComponent],
                providers: [
                    {provide: Router, useValue: router},
                    {provide: ActivatedRoute, useValue: router},
                    {provide: Location, useClass: SpyLocation}, FormBuilder
                ],
                schemas: [NO_ERRORS_SCHEMA]
            })
            .overrideComponent(OtpComponent, {
                set: {
                    providers: [
                        {provide: MyModel, useClass: MockModel}
                    ],
                }
            })
            .compileComponents();
    }));

    beforeEach(() => {
        fixture = TestBed.createComponent(OtpComponent);
        component = fixture.componentInstance;
    });

it('Back button click on OTP screen should redirect to identification screen', async(inject([Location], (location: Location) => {

        fixture.detectChanges();

        let buttonElements = fixture.debugElement.queryAll(By.css('button'));   // fetch all the elements with button tag.

        buttonElements[0].nativeElement.click();

        fixture.detectChanges();
        fixture.whenStable().then(
            () => {
                expect(location.path()).toBe(['/account/recovery', 'identification']);     // check if url is routed to identification page after back button is clicked
            }
        );
    })));

但它没有给我想要的结果，这是我得到的结果:

Chrome 56.0.2924 (Windows 7 0.0.0) OtpComponent Back button click on OTP screen should redirect to identification screen FAILED
        Expected '' to be [ '/account/recovery', 'identification' ].
            at webpack:///src/app/account/registration/otp/otp.component.spec.ts:775:40 <- src/test.ts:124883:37 [ProxyZone]
            at AsyncTestZoneSpec.onInvoke (webpack:///~/zone.js/dist/async-test.js:49:0 <- src/test.ts:98588:39) [ProxyZone]
            at ProxyZoneSpec.onInvoke (webpack:///~/zone.js/dist/proxy.js:76:0 <- src/test.ts:99280:39) [ProxyZone]
            at Zone.run (webpack:///~/zone.js/dist/zone.js:113:0 <- src/test.ts:148355:43) [ProxyZone => ProxyZone]
            at webpack:///~/zone.js/dist/zone.js:535:0 <- src/test.ts:148777:57 [ProxyZone]
Chrome 56.0.2924 (Windows 7 0.0.0): Executed 1 of 147 (1 FAILED) (skipped 146) ERROR (0.96 secs / 0.594 secs)

甚至buttonElements[0].nativeElement.click();似乎也不起作用，因为没有注册点击事件。

Answer 1

in the link you shared works for buttons, too. Here's a plnkr一起玩。我希望有一种方法可以静态（无点击）检查按钮上的路由器 link。我想您可以检查它的属性并检查 'ng-reflect-router-link'，但这感觉很脏。 ¯\_(ツ)_/¯

为测试路线创建一个轻量级组件 (DummyComponent)。（如果测试多条路由，可以多次使用。）
将 RouterTestingModule.withRoutes([...]) 包含在您正在测试的测试模块导入路径的虚拟组件中。

导入Location并将其注入到测试中。 RouterTestingModule 使用模拟位置策略，因此您可以检查更改。

@Component({ template: '' })
class DummyComponent {}

beforeEach(() => {
  TestBed.configureTestingModule({
    declarations: [AppComponent, DummyComponent],
    imports: [
      RouterTestingModule.withRoutes([
         { path: 'test', component: DummyComponent }
        ])
    ]
  });
});

describe('app', () => {
  it('should have a test button', inject([Location], (location) => {
    const fixture = TestBed.createComponent(AppComponent);
    const elem = fixture.debugElement;

    const button = elem.query(e => e.name === 'button');
    expect(!!button).toBe(true);
    expect(button.nativeElement.textContent.trim()).toBe('CLICK FOR BUBBLES');

    button.nativeElement.click();
    fixture.detectChanges();
    fixture.whenStable().then(() => {
      expect(location.path()).toBe('/test');
    });
  }));
});

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