|
| 1 | +import { Component } from '@angular/core'; |
| 2 | +import { BehaviorSubject } from 'rxjs'; |
| 3 | +import { tap } from 'rxjs/operators'; |
| 4 | +import { render, screen, fireEvent, waitFor } from '@testing-library/angular'; |
| 5 | + |
| 6 | +@Component({ |
| 7 | + template: `<button (click)="toggleShow()" data-testid="toggle">toggle</button> |
| 8 | + <div *ngIf="show$ | async" data-testid="getme">Here I am</div>`, |
| 9 | +}) |
| 10 | +export class TestSelectComponent { |
| 11 | + showSubj = new BehaviorSubject(false); |
| 12 | + show$ = this.showSubj.asObservable(); |
| 13 | + |
| 14 | + toggleShow() { |
| 15 | + this.showSubj.next(true); |
| 16 | + } |
| 17 | +} |
| 18 | + |
| 19 | +it('should show hidden text', async () => { |
| 20 | + await render(TestSelectComponent); |
| 21 | + const toggle = screen.getByTestId('toggle'); |
| 22 | + const hiddenText = screen.queryByTestId('getme'); |
| 23 | + |
| 24 | + expect(hiddenText).toBeNull(); |
| 25 | + fireEvent.click(toggle); |
| 26 | + |
| 27 | + // fails |
| 28 | + // await waitFor(() => expect(hiddenText).not.toBeNull()); |
| 29 | + |
| 30 | + // succeeds |
| 31 | + await waitFor(() => expect(screen.queryByTestId('getme')).not.toBeNull()); |
| 32 | +}); |
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