695df67929
Rob Wormald recognized that we had no plunker for a simple component test. Inspired improved learning path for testing including: * Add plunkers for both inline and external template versions of the simplest `BannerComponent` * Added the banner-specs for that purpose and also a quickstart-specs in the setup folder * Adjusted prose in testing and setup-systemjs-anatomy to call these out * Moved testing of external template spec earlier in the guide because it is likely to be needed right away. * Add comments on the optional "testing" folder and corrects var names to match * Leaves Jasmine Spec Runner output visible when tests finish
56 lines
1.6 KiB
TypeScript
56 lines
1.6 KiB
TypeScript
// #docplaster
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// #docregion imports
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import { ComponentFixture, TestBed } from '@angular/core/testing';
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import { By } from '@angular/platform-browser';
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import { DebugElement } from '@angular/core';
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import { BannerComponent } from './banner-inline.component';
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// #enddocregion imports
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// #docregion setup
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describe('BannerComponent (inline template)', () => {
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let comp: BannerComponent;
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let fixture: ComponentFixture<BannerComponent>;
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let de: DebugElement;
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let el: HTMLElement;
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// #docregion before-each
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beforeEach(() => {
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TestBed.configureTestingModule({
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declarations: [ BannerComponent ], // declare the test component
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});
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fixture = TestBed.createComponent(BannerComponent);
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comp = fixture.componentInstance; // BannerComponent test instance
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// query for the title <h1> by CSS element selector
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de = fixture.debugElement.query(By.css('h1'));
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el = de.nativeElement;
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});
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// #enddocregion before-each
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// #enddocregion setup
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// #docregion test-w-o-detect-changes
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it('no title in the DOM until manually call `detectChanges`', () => {
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expect(el.textContent).toEqual('');
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});
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// #enddocregion test-w-o-detect-changes
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// #docregion tests
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it('should display original title', () => {
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fixture.detectChanges();
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expect(el.textContent).toContain(comp.title);
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});
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it('should display a different test title', () => {
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comp.title = 'Test Title';
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fixture.detectChanges();
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expect(el.textContent).toContain('Test Title');
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});
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// #enddocregion tests
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// #docregion setup
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});
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// #enddocregion setup
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