アプリケーションのツールバーに_mat-menu
_のテストを記述しようとしています。テストでbutton.click()
を呼び出すと、コンソールに_Cannot read property 'templateRef' of undefined
_エラーが表示されます。
すべての作品がブラウザで見つかるので、これはテストの実行方法に関係していると思いますか?
_app.component.spec.ts
_
_import { TestBed, async, ComponentFixture } from '@angular/core/testing';
import { AppComponent } from './app.component';
import { RouterTestingModule } from '@angular/router/testing';
import { AppRoutes } from './app.routes';
import {
MatToolbarModule,
MatIconModule,
MatMenuModule,
MatButtonModule
} from '@angular/material';
import { HomeComponent } from './home/home.component';
import { UserService } from './user/user.service';
class MockUserService {
signIn() {}
}
describe('AppComponent', () => {
let app: AppComponent;
let fixture: ComponentFixture<AppComponent>;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [AppComponent, HomeComponent],
providers: [{ provide: UserService, useClass: MockUserService }],
imports: [
MatIconModule,
MatToolbarModule,
MatMenuModule,
MatButtonModule,
RouterTestingModule.withRoutes(AppRoutes)
]
}).compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(AppComponent);
app = fixture.debugElement.componentInstance;
});
it('should create the app', async(() => {
expect(app).toBeTruthy();
}));
it('open the menu when clicking on the account button', async () => {
const dom = fixture.debugElement.nativeElement;
const button = dom.querySelector('#userMenu');
button.click(); //Error occurs on this line, before the console.log()
console.log(button);
fixture.detectChanges();
});
});
_
_app.component.html
_
_<mat-menu #menu="matMenu" [overlapTrigger]="false" yPosition="below"> //appears to not be able to find this element?
<button mat-menu-item>
<span>Settings</span>
</button>
<button id="userSignIn" (click)="user.signIn()" mat-menu-item>
<span>Log In</span>
</button>
</mat-menu>
<mat-toolbar color="primary">
<span>Report Receiver</span>
<span class="fill-remaining-space"></span>
<button *ngIf="user.signedIn$ | async" routerLink="/emails/mapping" mat-icon-button>
<mat-icon>check_box</mat-icon>
</button>
<button *ngIf="user.signedIn$ | async" routerLink="/emails/received" mat-icon-button>
<mat-icon>list</mat-icon>
</button>
<button routerLink="/home" mat-icon-button>
<mat-icon>home</mat-icon>
</button>
<button id="userMenu" [matMenuTriggerFor]="menu" mat-icon-button>
<mat-icon>account_circle</mat-icon>
</button>
</mat-toolbar>
<router-outlet></router-outlet>
_
最終的なテストは次のようになりました。
import { TestBed, async, ComponentFixture } from '@angular/core/testing';
import { AppComponent } from './app.component';
import { RouterTestingModule } from '@angular/router/testing';
import { AppRoutes } from './app.routes';
import {
MatToolbarModule,
MatIconModule,
MatMenuModule,
MatButtonModule
} from '@angular/material';
import { HomeComponent } from './home/home.component';
import { UserService } from './user/user.service';
import { NoopAnimationsModule } from '@angular/platform-browser/animations';
import { BehaviorSubject } from '../../node_modules/rxjs';
class MockUserService {
signedIn$: BehaviorSubject<boolean> = new BehaviorSubject(false);
signIn() {}
}
describe('AppComponent', () => {
let app: AppComponent;
let fixture: ComponentFixture<AppComponent>;
let dom;
let button;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [AppComponent, HomeComponent],
providers: [{ provide: UserService, useClass: MockUserService }],
imports: [
NoopAnimationsModule,
MatIconModule,
MatToolbarModule,
MatMenuModule,
MatButtonModule,
RouterTestingModule.withRoutes(AppRoutes)
]
}).compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(AppComponent);
fixture.autoDetectChanges(true); //this was the key fix
spyOn(MockUserService.prototype, 'signIn').and.callThrough();
app = fixture.debugElement.componentInstance;
dom = fixture.nativeElement;
button = dom.querySelector('#userMenu');
});
it('should create the app', async(() => {
expect(app).toBeTruthy();
}));
describe('user menu', () => {
it('should not have the menu open', async () => {
const menu = dom.parentNode.querySelector('.mat-menu-panel');
expect(menu).toBeFalsy();
});
it('open the menu when clicking on the account button', async () => {
button.click();
const menu = dom.parentNode.querySelector('.mat-menu-panel');
expect(menu).toBeTruthy();
});
it('call user.signIn() once sign in button is pressed', async () => {
button.click();
const mockUser = TestBed.get(UserService);
dom.parentNode.querySelector('#userSignIn').click();
expect(mockUser['signIn']).toHaveBeenCalled();
});
});
describe('navigation icons', () => {
it('navigation icons show when user.signedIn$ emits true', async () => {
const mockUser = TestBed.get(UserService);
await mockUser.signedIn$.next(true);
await fixture.detectChanges();
expect(
dom.parentNode.querySelector('button[routerLink="/emails/received"]')
).toBeTruthy();
expect(
dom.parentNode.querySelector('button[routerLink="/emails/mapping"]')
).toBeTruthy();
});
it('navigation icons don\t show until user.signedIn$ emits true', async () => {
expect(
dom.parentNode.querySelector('button[routerLink="/emails/received"]')
).toBeFalsy();
expect(
dom.parentNode.querySelector('button[routerLink="/emails/mapping"]')
).toBeFalsy();
});
it('navigation icons don\t show until user.signedIn$ emits false', async () => {
const mockUser = TestBed.get(UserService);
await mockUser.signedIn$.next(false);
await fixture.detectChanges();
expect(
dom.parentNode.querySelector('button[routerLink="/emails/received"]')
).toBeFalsy();
expect(
dom.parentNode.querySelector('button[routerLink="/emails/mapping"]')
).toBeFalsy();
});
it('navigation icons re-hide on user.signedIn$ false', async () => {
const mockUser = TestBed.get(UserService);
await mockUser.signedIn$.next(true);
await fixture.detectChanges();
await mockUser.signedIn$.next(false);
await fixture.detectChanges();
expect(
dom.parentNode.querySelector('button[routerLink="/emails/received"]')
).toBeFalsy();
expect(
dom.parentNode.querySelector('button[routerLink="/emails/mapping"]')
).toBeFalsy();
});
});
});
より簡単な方法があります:
@ViewChildをコンポーネントで使用できます
@ViewChild('menuTrigger') menuTrigger: MatMenuTrigger;
htmlテンプレートには次のものがあります。
<button mat-icon-button [matMenuTriggerFor]="menu" #menuTrigger='matMenuTrigger'>
</button>
次に、テストに「openMenu()」があります。
fit('should show menu', () => {
component.menuTrigger.openMenu()
}