angular-cn/packages/core/test/component_fixture_spec.ts

332 lines
12 KiB
TypeScript

/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {Component, Injectable, Input} from '@angular/core';
import {ComponentFixtureAutoDetect, ComponentFixtureNoNgZone, TestBed, waitForAsync, withModule} from '@angular/core/testing';
import {dispatchEvent} from '@angular/platform-browser/testing/src/browser_util';
import {expect} from '@angular/platform-browser/testing/src/matchers';
@Component({selector: 'simple-comp', template: `<span>Original {{simpleBinding}}</span>`})
@Injectable()
class SimpleComp {
simpleBinding: string;
constructor() {
this.simpleBinding = 'Simple';
}
}
@Component({
selector: 'my-if-comp',
template: `MyIf(<span *ngIf="showMore">More</span>)`,
})
@Injectable()
class MyIfComp {
showMore: boolean = false;
}
@Component({selector: 'autodetect-comp', template: `<span (click)='click()'>{{text}}</span>`})
class AutoDetectComp {
text: string = '1';
click() {
this.text += '1';
}
}
@Component({selector: 'async-comp', template: `<span (click)='click()'>{{text}}</span>`})
class AsyncComp {
text: string = '1';
click() {
Promise.resolve(null).then((_) => {
this.text += '1';
});
}
}
@Component({selector: 'async-child-comp', template: '<span>{{localText}}</span>'})
class AsyncChildComp {
localText: string = '';
@Input()
set text(value: string) {
Promise.resolve(null).then((_) => {
this.localText = value;
});
}
}
@Component({
selector: 'async-change-comp',
template: `<async-child-comp (click)='click()' [text]="text"></async-child-comp>`
})
class AsyncChangeComp {
text: string = '1';
click() {
this.text += '1';
}
}
@Component({selector: 'async-timeout-comp', template: `<span (click)='click()'>{{text}}</span>`})
class AsyncTimeoutComp {
text: string = '1';
click() {
setTimeout(() => {
this.text += '1';
}, 10);
}
}
@Component(
{selector: 'nested-async-timeout-comp', template: `<span (click)='click()'>{{text}}</span>`})
class NestedAsyncTimeoutComp {
text: string = '1';
click() {
setTimeout(() => {
setTimeout(() => {
this.text += '1';
}, 10);
}, 10);
}
}
{
describe('ComponentFixture', () => {
beforeEach(waitForAsync(() => {
TestBed.configureTestingModule({
declarations: [
AutoDetectComp, AsyncComp, AsyncTimeoutComp, NestedAsyncTimeoutComp, AsyncChangeComp,
MyIfComp, SimpleComp, AsyncChildComp
]
});
}));
it('should auto detect changes if autoDetectChanges is called', () => {
const componentFixture = TestBed.createComponent(AutoDetectComp);
expect(componentFixture.ngZone).not.toBeNull();
componentFixture.autoDetectChanges();
expect(componentFixture.nativeElement).toHaveText('1');
const element = componentFixture.debugElement.children[0];
dispatchEvent(element.nativeElement, 'click');
expect(componentFixture.isStable()).toBe(true);
expect(componentFixture.nativeElement).toHaveText('11');
});
it('should auto detect changes if ComponentFixtureAutoDetect is provided as true',
withModule({providers: [{provide: ComponentFixtureAutoDetect, useValue: true}]}, () => {
const componentFixture = TestBed.createComponent(AutoDetectComp);
expect(componentFixture.nativeElement).toHaveText('1');
const element = componentFixture.debugElement.children[0];
dispatchEvent(element.nativeElement, 'click');
expect(componentFixture.nativeElement).toHaveText('11');
}));
it('should signal through whenStable when the fixture is stable (autoDetectChanges)',
waitForAsync(() => {
const componentFixture = TestBed.createComponent(AsyncComp);
componentFixture.autoDetectChanges();
expect(componentFixture.nativeElement).toHaveText('1');
const element = componentFixture.debugElement.children[0];
dispatchEvent(element.nativeElement, 'click');
expect(componentFixture.nativeElement).toHaveText('1');
// Component is updated asynchronously. Wait for the fixture to become stable
// before checking for new value.
expect(componentFixture.isStable()).toBe(false);
componentFixture.whenStable().then((waited) => {
expect(waited).toBe(true);
expect(componentFixture.nativeElement).toHaveText('11');
});
}));
it('should signal through isStable when the fixture is stable (no autoDetectChanges)',
waitForAsync(() => {
const componentFixture = TestBed.createComponent(AsyncComp);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('1');
const element = componentFixture.debugElement.children[0];
dispatchEvent(element.nativeElement, 'click');
expect(componentFixture.nativeElement).toHaveText('1');
// Component is updated asynchronously. Wait for the fixture to become stable
// before checking.
componentFixture.whenStable().then((waited) => {
expect(waited).toBe(true);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('11');
});
}));
it('should wait for macroTask(setTimeout) while checking for whenStable ' +
'(autoDetectChanges)',
waitForAsync(() => {
const componentFixture = TestBed.createComponent(AsyncTimeoutComp);
componentFixture.autoDetectChanges();
expect(componentFixture.nativeElement).toHaveText('1');
const element = componentFixture.debugElement.children[0];
dispatchEvent(element.nativeElement, 'click');
expect(componentFixture.nativeElement).toHaveText('1');
// Component is updated asynchronously. Wait for the fixture to become
// stable before checking for new value.
expect(componentFixture.isStable()).toBe(false);
componentFixture.whenStable().then((waited) => {
expect(waited).toBe(true);
expect(componentFixture.nativeElement).toHaveText('11');
});
}));
it('should wait for macroTask(setTimeout) while checking for whenStable ' +
'(no autoDetectChanges)',
waitForAsync(() => {
const componentFixture = TestBed.createComponent(AsyncTimeoutComp);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('1');
const element = componentFixture.debugElement.children[0];
dispatchEvent(element.nativeElement, 'click');
expect(componentFixture.nativeElement).toHaveText('1');
// Component is updated asynchronously. Wait for the fixture to become
// stable before checking for new value.
expect(componentFixture.isStable()).toBe(false);
componentFixture.whenStable().then((waited) => {
expect(waited).toBe(true);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('11');
});
}));
it('should wait for nested macroTasks(setTimeout) while checking for whenStable ' +
'(autoDetectChanges)',
waitForAsync(() => {
const componentFixture = TestBed.createComponent(NestedAsyncTimeoutComp);
componentFixture.autoDetectChanges();
expect(componentFixture.nativeElement).toHaveText('1');
const element = componentFixture.debugElement.children[0];
dispatchEvent(element.nativeElement, 'click');
expect(componentFixture.nativeElement).toHaveText('1');
// Component is updated asynchronously. Wait for the fixture to become
// stable before checking for new value.
expect(componentFixture.isStable()).toBe(false);
componentFixture.whenStable().then((waited) => {
expect(waited).toBe(true);
expect(componentFixture.nativeElement).toHaveText('11');
});
}));
it('should wait for nested macroTasks(setTimeout) while checking for whenStable ' +
'(no autoDetectChanges)',
waitForAsync(() => {
const componentFixture = TestBed.createComponent(NestedAsyncTimeoutComp);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('1');
const element = componentFixture.debugElement.children[0];
dispatchEvent(element.nativeElement, 'click');
expect(componentFixture.nativeElement).toHaveText('1');
// Component is updated asynchronously. Wait for the fixture to become
// stable before checking for new value.
expect(componentFixture.isStable()).toBe(false);
componentFixture.whenStable().then((waited) => {
expect(waited).toBe(true);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('11');
});
}));
it('should stabilize after async task in change detection (autoDetectChanges)',
waitForAsync(() => {
const componentFixture = TestBed.createComponent(AsyncChangeComp);
componentFixture.autoDetectChanges();
componentFixture.whenStable().then((_) => {
expect(componentFixture.nativeElement).toHaveText('1');
const element = componentFixture.debugElement.children[0];
dispatchEvent(element.nativeElement, 'click');
componentFixture.whenStable().then((_) => {
expect(componentFixture.nativeElement).toHaveText('11');
});
});
}));
it('should stabilize after async task in change detection(no autoDetectChanges)',
waitForAsync(() => {
const componentFixture = TestBed.createComponent(AsyncChangeComp);
componentFixture.detectChanges();
componentFixture.whenStable().then((_) => {
// Run detectChanges again so that stabilized value is reflected in the
// DOM.
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('1');
const element = componentFixture.debugElement.children[0];
dispatchEvent(element.nativeElement, 'click');
componentFixture.detectChanges();
componentFixture.whenStable().then((_) => {
// Run detectChanges again so that stabilized value is reflected in
// the DOM.
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('11');
});
});
}));
describe('No NgZone', () => {
beforeEach(() => {
TestBed.configureTestingModule(
{providers: [{provide: ComponentFixtureNoNgZone, useValue: true}]});
});
it('calling autoDetectChanges raises an error', () => {
const componentFixture = TestBed.createComponent(SimpleComp);
expect(() => {
componentFixture.autoDetectChanges();
}).toThrowError(/Cannot call autoDetectChanges when ComponentFixtureNoNgZone is set/);
});
it('should instantiate a component with valid DOM', waitForAsync(() => {
const componentFixture = TestBed.createComponent(SimpleComp);
expect(componentFixture.ngZone).toBeNull();
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('Original Simple');
}));
it('should allow changing members of the component', waitForAsync(() => {
const componentFixture = TestBed.createComponent(MyIfComp);
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('MyIf()');
componentFixture.componentInstance.showMore = true;
componentFixture.detectChanges();
expect(componentFixture.nativeElement).toHaveText('MyIf(More)');
}));
});
});
}