a7e1f236ff
- updates tests - heavy prose revisions - uses HttpClient (with angular-in-memory-web-api) - test HeroService using `HttpClientTestingModule` - scrub away most By.CSS - fake async observable with `asyncData()` - extensive Twain work - different take on retryWhen - remove app barrels (& systemjs.extras) which troubled plunker/systemjs - add dummy export const to hero.ts (plunkr/systemjs fails w/o it) - shrink and re-organize TOC - add marble testing package and tests - demonstrate the "no beforeEach()" test coding style - add section on Http service testing - prepare for stackblitz - confirm works in plunker except excluded marble test - add tests for avoidFile class feature of CodeExampleComponent PR Close #20697
57 lines
1.7 KiB
TypeScript
57 lines
1.7 KiB
TypeScript
// #docplaster
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// #docregion
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import { ComponentFixture, TestBed } from '@angular/core/testing';
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import { DebugElement } from '@angular/core';
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import { BannerComponent } from './banner.component';
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describe('BannerComponent (inline template)', () => {
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// #docregion setup
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let component: BannerComponent;
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let fixture: ComponentFixture<BannerComponent>;
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let h1: HTMLElement;
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// #docregion configure-and-create
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beforeEach(() => {
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TestBed.configureTestingModule({
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declarations: [ BannerComponent ],
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});
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fixture = TestBed.createComponent(BannerComponent);
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// #enddocregion configure-and-create
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component = fixture.componentInstance; // BannerComponent test instance
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h1 = fixture.nativeElement.querySelector('h1');
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// #docregion configure-and-create
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});
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// #enddocregion setup, configure-and-create
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// #docregion test-w-o-detect-changes
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it('no title in the DOM after createComponent()', () => {
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expect(h1.textContent).toEqual('');
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});
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// #enddocregion test-w-o-detect-changes
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// #docregion expect-h1-default-v1
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it('should display original title', () => {
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// #enddocregion expect-h1-default-v1
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fixture.detectChanges();
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// #docregion expect-h1-default-v1
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expect(h1.textContent).toContain(component.title);
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});
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// #enddocregion expect-h1-default-v1
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// #docregion expect-h1-default
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it('should display original title after detectChanges()', () => {
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fixture.detectChanges();
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expect(h1.textContent).toContain(component.title);
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});
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// #enddocregion expect-h1-default
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// #docregion after-change
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it('should display a different test title', () => {
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component.title = 'Test Title';
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fixture.detectChanges();
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expect(h1.textContent).toContain('Test Title');
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});
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// #enddocregion after-change
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});
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