angular-docs-cn/modules/@angular/common/test/directives/ng_template_outlet_spec.ts

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import {beforeEach, ddescribe, describe, expect, iit, inject, it, xit,} from '@angular/core/testing/testing_internal';
import {TestComponentBuilder, ComponentFixture} from '@angular/compiler/testing';
import {AsyncTestCompleter} from '@angular/core/testing/testing_internal';
import {Component, Directive, TemplateRef, ContentChildren, QueryList} from '@angular/core';
import {NgTemplateOutlet} from '@angular/common';
export function main() {
describe('insert', () => {
it('should do nothing if templateRef is null',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var template = `<template [ngTemplateOutlet]="null"></template>`;
tcb.overrideTemplate(TestComponent, template)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('');
async.done();
});
}));
it('should insert content specified by TemplateRef',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var template =
`<tpl-refs #refs="tplRefs"><template>foo</template></tpl-refs><template [ngTemplateOutlet]="currentTplRef"></template>`;
tcb.overrideTemplate(TestComponent, template)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('');
var refs = fixture.debugElement.children[0].references['refs'];
fixture.componentInstance.currentTplRef = refs.tplRefs.first;
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('foo');
async.done();
});
}));
it('should clear content if TemplateRef becomes null',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var template =
`<tpl-refs #refs="tplRefs"><template>foo</template></tpl-refs><template [ngTemplateOutlet]="currentTplRef"></template>`;
tcb.overrideTemplate(TestComponent, template)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
var refs = fixture.debugElement.children[0].references['refs'];
fixture.componentInstance.currentTplRef = refs.tplRefs.first;
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('foo');
fixture.componentInstance.currentTplRef = null;
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('');
async.done();
});
}));
it('should swap content if TemplateRef changes',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var template =
`<tpl-refs #refs="tplRefs"><template>foo</template><template>bar</template></tpl-refs><template [ngTemplateOutlet]="currentTplRef"></template>`;
tcb.overrideTemplate(TestComponent, template)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
var refs = fixture.debugElement.children[0].references['refs'];
fixture.componentInstance.currentTplRef = refs.tplRefs.first;
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('foo');
fixture.componentInstance.currentTplRef = refs.tplRefs.last;
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('bar');
async.done();
});
}));
it('should display template if context is null',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var template =
`<tpl-refs #refs="tplRefs"><template>foo</template></tpl-refs><template [ngTemplateOutlet]="currentTplRef" [ngOutletContext]="null"></template>`;
tcb.overrideTemplate(TestComponent, template)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('');
var refs = fixture.debugElement.children[0].references['refs'];
fixture.componentInstance.currentTplRef = refs.tplRefs.first;
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('foo');
async.done();
});
}));
it('should reflect initial context and changes',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var template =
`<tpl-refs #refs="tplRefs"><template let-foo="foo"><span>{{foo}}</span></template></tpl-refs><template [ngTemplateOutlet]="currentTplRef" [ngOutletContext]="context"></template>`;
tcb.overrideTemplate(TestComponent, template)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
var refs = fixture.debugElement.children[0].references['refs'];
fixture.componentInstance.currentTplRef = refs.tplRefs.first;
fixture.detectChanges();
expect(fixture.debugElement.nativeElement).toHaveText('bar');
fixture.componentInstance.context.foo = 'alter-bar';
fixture.detectChanges();
expect(fixture.debugElement.nativeElement).toHaveText('alter-bar');
async.done();
});
}));
it('should reflect user defined $implicit property in the context',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var template =
`<tpl-refs #refs="tplRefs"><template let-ctx><span>{{ctx.foo}}</span></template></tpl-refs><template [ngTemplateOutlet]="currentTplRef" [ngOutletContext]="context"></template>`;
tcb.overrideTemplate(TestComponent, template)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
var refs = fixture.debugElement.children[0].references['refs'];
fixture.componentInstance.currentTplRef = refs.tplRefs.first;
fixture.componentInstance.context = {
$implicit: fixture.componentInstance.context
};
fixture.detectChanges();
expect(fixture.debugElement.nativeElement).toHaveText('bar');
async.done();
});
}));
it('should reflect context re-binding',
inject(
[TestComponentBuilder, AsyncTestCompleter],
(tcb: TestComponentBuilder, async: AsyncTestCompleter) => {
var template =
`<tpl-refs #refs="tplRefs"><template let-shawshank="shawshank"><span>{{shawshank}}</span></template></tpl-refs><template [ngTemplateOutlet]="currentTplRef" [ngOutletContext]="context"></template>`;
tcb.overrideTemplate(TestComponent, template)
.createAsync(TestComponent)
.then((fixture) => {
fixture.detectChanges();
var refs = fixture.debugElement.children[0].references['refs'];
fixture.componentInstance.currentTplRef = refs.tplRefs.first;
fixture.componentInstance.context = {shawshank: 'brooks'};
fixture.detectChanges();
expect(fixture.debugElement.nativeElement).toHaveText('brooks');
fixture.componentInstance.context = {shawshank: 'was here'};
fixture.detectChanges();
expect(fixture.debugElement.nativeElement).toHaveText('was here');
async.done();
});
}));
});
}
@Directive({selector: 'tpl-refs', exportAs: 'tplRefs'})
class CaptureTplRefs {
@ContentChildren(TemplateRef) tplRefs: QueryList<TemplateRef<any>>;
}
@Component({selector: 'test-cmp', directives: [NgTemplateOutlet, CaptureTplRefs], template: ''})
class TestComponent {
currentTplRef: TemplateRef<any>;
context: any = {foo: 'bar'};
}