angular-docs-cn/packages/core/test/acceptance/content_spec.ts

1227 lines
37 KiB
TypeScript

/**
* @license
* Copyright Google Inc. 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 {CommonModule} from '@angular/common';
import {ChangeDetectorRef, Component, Directive, TemplateRef, ViewChild, ViewContainerRef} from '@angular/core';
import {Input} from '@angular/core/src/metadata';
import {TestBed} from '@angular/core/testing';
import {By} from '@angular/platform-browser';
import {expect} from '@angular/platform-browser/testing/src/matchers';
describe('projection', () => {
function getElementHtml(element: HTMLElement) {
return element.innerHTML.replace(/<!--(\W|\w)*?-->/g, '')
.replace(/\sng-reflect-\S*="[^"]*"/g, '');
}
it('should project content', () => {
@Component({selector: 'child', template: `<div><ng-content></ng-content></div>`})
class Child {
}
@Component({selector: 'parent', template: '<child>content</child>'})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(fixture.nativeElement.innerHTML).toBe(`<child><div>content</div></child>`);
});
it('should project content when <ng-content> is at a template root', () => {
@Component({
selector: 'child',
template: '<ng-content></ng-content>',
})
class Child {
}
@Component({
selector: 'parent',
template: '<child>content</child>',
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(fixture.nativeElement.innerHTML).toBe(`<child>content</child>`);
});
it('should project content with siblings', () => {
@Component({selector: 'child', template: '<ng-content></ng-content>'})
class Child {
}
@Component({selector: 'parent', template: `<child>before<div>content</div>after</child>`})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(fixture.nativeElement.innerHTML).toBe(`<child>before<div>content</div>after</child>`);
});
it('should be able to re-project content', () => {
@Component({selector: 'grand-child', template: `<div><ng-content></ng-content></div>`})
class GrandChild {
}
@Component(
{selector: 'child', template: `<grand-child><ng-content></ng-content></grand-child>`})
class Child {
}
@Component({
selector: 'parent',
template: `<child><b>Hello</b>World!</child>`,
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child, GrandChild]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(fixture.nativeElement.innerHTML)
.toBe('<child><grand-child><div><b>Hello</b>World!</div></grand-child></child>');
});
it('should project components', () => {
@Component({
selector: 'child',
template: `<div><ng-content></ng-content></div>`,
})
class Child {
}
@Component({
selector: 'projected-comp',
template: 'content',
})
class ProjectedComp {
}
@Component({selector: 'parent', template: `<child><projected-comp></projected-comp></child>`})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child, ProjectedComp]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(fixture.nativeElement.innerHTML)
.toBe('<child><div><projected-comp>content</projected-comp></div></child>');
});
it('should project components that have their own projection', () => {
@Component({selector: 'child', template: `<div><ng-content></ng-content></div>`})
class Child {
}
@Component({selector: 'projected-comp', template: `<p><ng-content></ng-content></p>`})
class ProjectedComp {
}
@Component({
selector: 'parent',
template: `
<child>
<projected-comp><div>Some content</div>Other content</projected-comp>
</child>`,
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child, ProjectedComp]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(fixture.nativeElement.innerHTML)
.toBe(
`<child><div><projected-comp><p><div>Some content</div>Other content</p></projected-comp></div></child>`);
});
it('should project with multiple instances of a component with projection', () => {
@Component({selector: 'child', template: `<div><ng-content></ng-content></div>`})
class Child {
}
@Component({selector: 'projected-comp', template: `Before<ng-content></ng-content>After`})
class ProjectedComp {
}
@Component({
selector: 'parent',
template: `
<child>
<projected-comp><div>A</div><p>123</p></projected-comp>
<projected-comp><div>B</div><p>456</p></projected-comp>
</child>`,
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child, ProjectedComp]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(fixture.nativeElement.innerHTML)
.toBe(
'<child><div>' +
'<projected-comp>Before<div>A</div><p>123</p>After</projected-comp>' +
'<projected-comp>Before<div>B</div><p>456</p>After</projected-comp>' +
'</div></child>');
});
it('should re-project with multiple instances of a component with projection', () => {
@Component({selector: 'child', template: `<div><ng-content></ng-content></div>`})
class Child {
}
@Component({selector: 'projected-comp', template: `Before<ng-content></ng-content>After`})
class ProjectedComp {
}
@Component({
selector: 'parent',
template: `
<child>
<projected-comp><div>A</div><ng-content></ng-content><p>123</p></projected-comp>
<projected-comp><div>B</div><p>456</p></projected-comp>
</child>`,
})
class Parent {
}
@Component({
selector: 'app',
template: `
<parent>**ABC**</parent>
<parent>**DEF**</parent>
`,
})
class App {
}
TestBed.configureTestingModule({declarations: [App, Parent, Child, ProjectedComp]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
expect(fixture.nativeElement.innerHTML)
.toBe(
'<parent><child><div>' +
'<projected-comp>Before<div>A</div>**ABC**<p>123</p>After</projected-comp>' +
'<projected-comp>Before<div>B</div><p>456</p>After</projected-comp>' +
'</div></child></parent>' +
'<parent><child><div>' +
'<projected-comp>Before<div>A</div>**DEF**<p>123</p>After</projected-comp>' +
'<projected-comp>Before<div>B</div><p>456</p>After</projected-comp>' +
'</div></child></parent>');
});
it('should project into dynamic views (with createEmbeddedView)', () => {
@Component({
selector: 'child',
template: `Before-<ng-template [ngIf]="showing"><ng-content></ng-content></ng-template>-After`
})
class Child {
showing = false;
}
@Component({selector: 'parent', template: `<child><div>A</div>Some text</child>`})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child], imports: [CommonModule]});
const fixture = TestBed.createComponent(Parent);
const childDebugEl = fixture.debugElement.query(By.directive(Child));
const childInstance = childDebugEl.injector.get(Child);
const childElement = childDebugEl.nativeElement as HTMLElement;
childInstance.showing = true;
fixture.detectChanges();
expect(getElementHtml(childElement)).toBe(`Before-<div>A</div>Some text-After`);
childInstance.showing = false;
fixture.detectChanges();
expect(getElementHtml(childElement)).toBe(`Before--After`);
childInstance.showing = true;
fixture.detectChanges();
expect(getElementHtml(childElement)).toBe(`Before-<div>A</div>Some text-After`);
});
it('should project into dynamic views with specific selectors', () => {
@Component({
selector: 'child',
template: `
<ng-content></ng-content>
Before-
<ng-template [ngIf]="showing">
<ng-content select="div"></ng-content>
</ng-template>
-After`
})
class Child {
showing = false;
}
@Component({
selector: 'parent',
template: `
<child>
<div>A</div>
<span>B</span>
</child>
`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child], imports: [CommonModule]});
const fixture = TestBed.createComponent(Parent);
const childDebugEl = fixture.debugElement.query(By.directive(Child));
const childInstance = childDebugEl.injector.get(Child);
childInstance.showing = true;
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toBe('<child><span>B</span> Before- <div>A</div> -After</child>');
childInstance.showing = false;
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toBe('<child><span>B</span> Before- -After</child>');
childInstance.showing = true;
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toBe('<child><span>B</span> Before- <div>A</div> -After</child>');
});
it('should project if <ng-content> is in a template that has different declaration/insertion points',
() => {
@Component(
{selector: 'comp', template: `<ng-template><ng-content></ng-content></ng-template>`})
class Comp {
@ViewChild(TemplateRef, {static: true}) template !: TemplateRef<any>;
}
@Directive({selector: '[trigger]'})
class Trigger {
@Input() trigger !: Comp;
constructor(public vcr: ViewContainerRef) {}
open() { this.vcr.createEmbeddedView(this.trigger.template); }
}
@Component({
selector: 'parent',
template: `
<button [trigger]="comp"></button>
<comp #comp>Some content</comp>
`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Trigger, Comp]});
const fixture = TestBed.createComponent(Parent);
const trigger = fixture.debugElement.query(By.directive(Trigger)).injector.get(Trigger);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement)).toBe(`<button></button><comp></comp>`);
trigger.open();
expect(getElementHtml(fixture.nativeElement))
.toBe(`<button></button>Some content<comp></comp>`);
});
it('should project nodes into the last ng-content', () => {
@Component({
selector: 'child',
template: `<div><ng-content></ng-content></div>
<span><ng-content></ng-content></span>`
})
class Child {
}
@Component({selector: 'parent', template: `<child>content</child>`})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child], imports: [CommonModule]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toBe('<child><div></div><span>content</span></child>');
});
// https://stackblitz.com/edit/angular-ceqmnw?file=src%2Fapp%2Fapp.component.ts
it('should project nodes into the last ng-content unrolled by ngFor', () => {
@Component({
selector: 'child',
template:
`<div *ngFor="let item of [1, 2]; let i = index">({{i}}):<ng-content></ng-content></div>`
})
class Child {
}
@Component({selector: 'parent', template: `<child>content</child>`})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child], imports: [CommonModule]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toBe('<child><div>(0):</div><div>(1):content</div></child>');
});
it('should handle projected containers inside other containers', () => {
@Component({selector: 'nested-comp', template: `<div>Child content</div>`})
class NestedComp {
}
@Component({
selector: 'root-comp',
template: `<ng-content></ng-content>`,
})
class RootComp {
}
@Component({
selector: 'my-app',
template: `
<root-comp>
<ng-container *ngFor="let item of items; last as last">
<nested-comp *ngIf="!last"></nested-comp>
</ng-container>
</root-comp>
`
})
class MyApp {
items = [1, 2];
}
TestBed.configureTestingModule(
{declarations: [MyApp, RootComp, NestedComp], imports: [CommonModule]});
const fixture = TestBed.createComponent(MyApp);
fixture.detectChanges();
// expecting # of divs to be (items.length - 1), since last element is filtered out by *ngIf,
// this applies to all other assertions below
expect(fixture.nativeElement.querySelectorAll('div').length).toBe(1);
fixture.componentInstance.items = [3, 4, 5];
fixture.detectChanges();
expect(fixture.nativeElement.querySelectorAll('div').length).toBe(2);
fixture.componentInstance.items = [6, 7, 8, 9];
fixture.detectChanges();
expect(fixture.nativeElement.querySelectorAll('div').length).toBe(3);
});
it('should handle projection into element containers at the view root', () => {
@Component({
selector: 'root-comp',
template: `
<ng-template [ngIf]="show">
<ng-container>
<ng-content></ng-content>
</ng-container>
</ng-template>`,
})
class RootComp {
@Input() show: boolean = true;
}
@Component({
selector: 'my-app',
template: `<root-comp [show]="show"><div></div></root-comp>
`
})
class MyApp {
show = true;
}
TestBed.configureTestingModule({declarations: [MyApp, RootComp]});
const fixture = TestBed.createComponent(MyApp);
fixture.detectChanges();
expect(fixture.nativeElement.querySelectorAll('div').length).toBe(1);
fixture.componentInstance.show = false;
fixture.detectChanges();
expect(fixture.nativeElement.querySelectorAll('div').length).toBe(0);
});
it('should handle projection of views with element containers at the root', () => {
@Component({
selector: 'root-comp',
template: `<ng-template [ngIf]="show"><ng-content></ng-content></ng-template>`,
})
class RootComp {
@Input() show: boolean = true;
}
@Component({
selector: 'my-app',
template: `<root-comp [show]="show"><ng-container><div></div></ng-container></root-comp>`
})
class MyApp {
show = true;
}
TestBed.configureTestingModule({declarations: [MyApp, RootComp]});
const fixture = TestBed.createComponent(MyApp);
fixture.detectChanges();
expect(fixture.nativeElement.querySelectorAll('div').length).toBe(1);
fixture.componentInstance.show = false;
fixture.detectChanges();
expect(fixture.nativeElement.querySelectorAll('div').length).toBe(0);
});
it('should project ng-container at the content root', () => {
@Component({selector: 'child', template: `<ng-content></ng-content>`})
class Child {
}
@Component({
selector: 'parent',
template: `<child>
<ng-container>
<ng-container>content</ng-container>
</ng-container>
</child>
`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement)).toBe('<child>content</child>');
});
it('should re-project ng-container at the content root', () => {
@Component({selector: 'grand-child', template: `<ng-content></ng-content>`})
class GrandChild {
}
@Component({
selector: 'child',
template: `<grand-child>
<ng-content></ng-content>
</grand-child>`
})
class Child {
}
@Component({
selector: 'parent',
template: `<child>
<ng-container>
<ng-container>content</ng-container>
</ng-container>
</child>
`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Parent, Child, GrandChild]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toBe('<child><grand-child>content</grand-child></child>');
});
it('should handle re-projection at the root of an embedded view', () => {
@Component({
selector: 'child-comp',
template: `<ng-template [ngIf]="show"><ng-content></ng-content></ng-template>`,
})
class ChildComp {
@Input() show: boolean = true;
}
@Component({
selector: 'parent-comp',
template: `<child-comp [show]="show"><ng-content></ng-content></child-comp>`
})
class ParentComp {
@Input() show: boolean = true;
}
@Component(
{selector: 'my-app', template: `<parent-comp [show]="show"><div></div></parent-comp>`})
class MyApp {
show = true;
}
TestBed.configureTestingModule({declarations: [MyApp, ParentComp, ChildComp]});
const fixture = TestBed.createComponent(MyApp);
fixture.detectChanges();
expect(fixture.nativeElement.querySelectorAll('div').length).toBe(1);
fixture.componentInstance.show = false;
fixture.detectChanges();
expect(fixture.nativeElement.querySelectorAll('div').length).toBe(0);
});
describe('with selectors', () => {
it('should project nodes using attribute selectors', () => {
@Component({
selector: 'child',
template: `<div id="first"><ng-content select="span[title=toFirst]"></ng-content></div>
<div id="second"><ng-content select="span[title=toSecond]"></ng-content></div>`,
})
class Child {
}
@Component({
selector: 'parent',
template: `<child><span title="toFirst">1</span><span title="toSecond">2</span></child>`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Child, Parent]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toEqual(
'<child><div id="first"><span title="toFirst">1</span></div><div id="second"><span title="toSecond">2</span></div></child>');
});
it('should project nodes using class selectors', () => {
@Component({
selector: 'child',
template: `<div id="first"><ng-content select="span.toFirst"></ng-content></div>
<div id="second"><ng-content select="span.toSecond"></ng-content></div>`,
})
class Child {
}
@Component({
selector: 'parent',
template: `<child><span class="toFirst">1</span><span class="toSecond">2</span></child>`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Child, Parent]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toEqual(
'<child><div id="first"><span class="toFirst">1</span></div><div id="second"><span class="toSecond">2</span></div></child>');
});
it('should project nodes using class selectors when element has multiple classes', () => {
@Component({
selector: 'child',
template: `<div id="first"><ng-content select="span.toFirst"></ng-content></div>
<div id="second"><ng-content select="span.toSecond"></ng-content></div>`
})
class Child {
}
@Component({
selector: 'parent',
template:
`<child><span class="other toFirst">1</span><span class="noise toSecond">2</span></child>`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Child, Parent]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toEqual(
'<child><div id="first"><span class="other toFirst">1</span></div><div id="second"><span class="noise toSecond">2</span></div></child>');
});
it('should project nodes into the first matching selector', () => {
@Component({
selector: 'child',
template: `<div id="first"><ng-content select="span"></ng-content></div>
<div id="second"><ng-content select="span.toSecond"></ng-content></div>`
})
class Child {
}
@Component({
selector: 'parent',
template: `<child><span class="toFirst">1</span><span class="toSecond">2</span></child>`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Child, Parent]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toEqual(
'<child><div id="first"><span class="toFirst">1</span><span class="toSecond">2</span></div><div id="second"></div></child>');
});
it('should allow mixing ng-content with and without selectors', () => {
@Component({
selector: 'child',
template: `<div id="first"><ng-content select="span.toFirst"></ng-content></div>
<div id="second"><ng-content></ng-content></div>`
})
class Child {
}
@Component({
selector: 'parent',
template:
`<child><span class="toFirst">1</span><span>remaining</span>more remaining</child>`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Child, Parent]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toEqual(
'<child><div id="first"><span class="toFirst">1</span></div><div id="second"><span>remaining</span>more remaining</div></child>');
});
it('should allow mixing ng-content with and without selectors - ng-content first', () => {
@Component({
selector: 'child',
template: `<div id="first"><ng-content></ng-content></div>
<div id="second"><ng-content select="span.toSecond"></ng-content></div>`
})
class Child {
}
@Component({
selector: 'parent',
template: `<child><span>1</span><span class="toSecond">2</span>remaining</child>`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Child, Parent]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toEqual(
'<child><div id="first"><span>1</span>remaining</div><div id="second"><span class="toSecond">2</span></div></child>');
});
/**
* Descending into projected content for selector-matching purposes is not supported
* today: http://plnkr.co/edit/MYQcNfHSTKp9KvbzJWVQ?p=preview
*/
it('should not descend into re-projected content', () => {
@Component({
selector: 'grand-child',
template: `<ng-content select="span"></ng-content><hr><ng-content></ng-content>`
})
class GrandChild {
}
@Component({
selector: 'child',
template: `<grand-child>
<ng-content></ng-content>
<span>in child template</span>
</grand-child>`
})
class Child {
}
@Component({selector: 'parent', template: `<child><span>parent content</span></child>`})
class Parent {
}
TestBed.configureTestingModule({declarations: [GrandChild, Child, Parent]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toEqual(
'<child><grand-child><span>in child template</span><hr><span>parent content</span></grand-child></child>');
});
it('should not descend into re-projected content', () => {
@Component({
selector: 'card',
template:
`<ng-content select="[card-title]"></ng-content><hr><ng-content select="[card-content]"></ng-content>`
})
class Card {
}
@Component({
selector: 'card-with-title',
template: `<card>
<h1 card-title>Title</h1>
<ng-content card-content></ng-content>
</card>`
})
class CardWithTitle {
}
@Component({selector: 'parent', template: `<card-with-title>content</card-with-title>`})
class Parent {
}
TestBed.configureTestingModule({declarations: [Card, CardWithTitle, Parent]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toEqual(
'<card-with-title><card><h1 card-title="">Title</h1><hr>content</card></card-with-title>');
});
it('should not match selectors against node having ngProjectAs attribute', () => {
@Component({selector: 'child', template: `<ng-content select="div"></ng-content>`})
class Child {
}
@Component({
selector: 'parent',
template:
`<child><div ngProjectAs="span">should not project</div><div>should project</div></child>`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Child, Parent]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toEqual('<child><div>should project</div></child>');
});
// https://stackblitz.com/edit/angular-psokum?file=src%2Fapp%2Fapp.module.ts
it('should project nodes where attribute selector matches a binding', () => {
@Component({
selector: 'child',
template: `<ng-content select="[title]"></ng-content>`,
})
class Child {
}
@Component({
selector: 'parent',
template: `<child><span [title]="'Some title'">Has title</span></child>`
})
class Parent {
}
TestBed.configureTestingModule({declarations: [Child, Parent]});
const fixture = TestBed.createComponent(Parent);
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toEqual('<child><span title="Some title">Has title</span></child>');
});
it('should match selectors against projected containers', () => {
@Component(
{selector: 'child', template: `<span><ng-content select="div"></ng-content></span>`})
class Child {
}
@Component({template: `<child><div *ngIf="value">content</div></child>`})
class Parent {
value = false;
}
TestBed.configureTestingModule({declarations: [Child, Parent]});
const fixture = TestBed.createComponent(Parent);
fixture.componentInstance.value = true;
fixture.detectChanges();
expect(getElementHtml(fixture.nativeElement))
.toEqual('<child><span><div>content</div></span></child>');
});
});
it('should handle projected containers inside other containers', () => {
@Component({
selector: 'child-comp', //
template: '<ng-content></ng-content>'
})
class ChildComp {
}
@Component({
selector: 'root-comp', //
template: '<ng-content></ng-content>'
})
class RootComp {
}
@Component({
selector: 'my-app',
template: `
<root-comp>
<ng-container *ngFor="let item of items; last as last">
<child-comp *ngIf="!last">{{ item }}|</child-comp>
</ng-container>
</root-comp>
`
})
class MyApp {
items: number[] = [1, 2, 3];
}
TestBed.configureTestingModule({declarations: [ChildComp, RootComp, MyApp]});
const fixture = TestBed.createComponent(MyApp);
fixture.detectChanges();
// expecting # of elements to be (items.length - 1), since last element is filtered out by
// *ngIf, this applies to all other assertions below
expect(fixture.nativeElement).toHaveText('1|2|');
fixture.componentInstance.items = [4, 5];
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('4|');
fixture.componentInstance.items = [6, 7, 8, 9];
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('6|7|8|');
});
it('should project content if the change detector has been detached', () => {
@Component({selector: 'my-comp', template: '<ng-content></ng-content>'})
class MyComp {
constructor(changeDetectorRef: ChangeDetectorRef) { changeDetectorRef.detach(); }
}
@Component({
selector: 'my-app',
template: `
<my-comp>
<p>hello</p>
</my-comp>
`
})
class MyApp {
}
TestBed.configureTestingModule({declarations: [MyComp, MyApp]});
const fixture = TestBed.createComponent(MyApp);
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('hello');
});
it('should support ngProjectAs on elements (including <ng-content>)', () => {
@Component({
selector: 'card',
template: `
<ng-content select="[card-title]"></ng-content>
---
<ng-content select="[card-content]"></ng-content>
`
})
class Card {
}
@Component({
selector: 'card-with-title',
template: `
<card>
<h1 ngProjectAs="[card-title]">Title</h1>
<ng-content ngProjectAs="[card-content]"></ng-content>
</card>
`
})
class CardWithTitle {
}
@Component({
selector: 'app',
template: `
<card-with-title>content</card-with-title>
`
})
class App {
}
TestBed.configureTestingModule({declarations: [Card, CardWithTitle, App]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
// Compare the text output, because Ivy and ViewEngine produce slightly different HTML.
expect(fixture.nativeElement.textContent).toContain('Title --- content');
});
it('should not match multiple selectors in ngProjectAs', () => {
@Component({
selector: 'card',
template: `
<ng-content select="[card-title]"></ng-content>
content
`
})
class Card {
}
@Component({
template: `
<card>
<h1 ngProjectAs="[non-existing-title-slot],[card-title]">Title</h1>
</card>
`
})
class App {
}
TestBed.configureTestingModule({declarations: [Card, App]});
const fixture = TestBed.createComponent(App);
fixture.detectChanges();
// Compare the text output, because Ivy and ViewEngine produce slightly different HTML.
expect(fixture.nativeElement.textContent).not.toContain('Title content');
});
it('should preserve ngProjectAs and other attributes on projected element', () => {
@Component({
selector: 'projector',
template: `<ng-content select="projectMe"></ng-content>`,
})
class Projector {
}
@Component({
template: `
<projector>
<div ngProjectAs="projectMe" title="some title"></div>
</projector>
`
})
class Root {
}
TestBed.configureTestingModule({
declarations: [Root, Projector],
});
const fixture = TestBed.createComponent(Root);
fixture.detectChanges();
const projectedElement = fixture.debugElement.query(By.css('div'));
const {ngProjectAs, title} = projectedElement.attributes;
expect(ngProjectAs).toBe('projectMe');
expect(title).toBe('some title');
});
describe('on inline templates (e.g. *ngIf)', () => {
it('should work when matching the element name', () => {
let divDirectives = 0;
@Component({selector: 'selector-proj', template: '<ng-content select="div"></ng-content>'})
class SelectedNgContentComp {
}
@Directive({selector: 'div'})
class DivDirective {
constructor() { divDirectives++; }
}
@Component({
selector: 'main-selector',
template: '<selector-proj><div x="true" *ngIf="true">Hello world!</div></selector-proj>'
})
class SelectorMainComp {
}
TestBed.configureTestingModule(
{declarations: [DivDirective, SelectedNgContentComp, SelectorMainComp]});
const fixture = TestBed.createComponent<SelectorMainComp>(SelectorMainComp);
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('Hello world!');
expect(divDirectives).toEqual(1);
});
it('should work when matching attributes', () => {
let xDirectives = 0;
@Component({selector: 'selector-proj', template: '<ng-content select="[x]"></ng-content>'})
class SelectedNgContentComp {
}
@Directive({selector: '[x]'})
class XDirective {
constructor() { xDirectives++; }
}
@Component({
selector: 'main-selector',
template: '<selector-proj><div x="true" *ngIf="true">Hello world!</div></selector-proj>'
})
class SelectorMainComp {
}
TestBed.configureTestingModule(
{declarations: [XDirective, SelectedNgContentComp, SelectorMainComp]});
const fixture = TestBed.createComponent<SelectorMainComp>(SelectorMainComp);
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('Hello world!');
expect(xDirectives).toEqual(1);
});
it('should work when matching classes', () => {
let xDirectives = 0;
@Component({selector: 'selector-proj', template: '<ng-content select=".x"></ng-content>'})
class SelectedNgContentComp {
}
@Directive({selector: '.x'})
class XDirective {
constructor() { xDirectives++; }
}
@Component({
selector: 'main-selector',
template: '<selector-proj><div class="x" *ngIf="true">Hello world!</div></selector-proj>'
})
class SelectorMainComp {
}
TestBed.configureTestingModule(
{declarations: [XDirective, SelectedNgContentComp, SelectorMainComp]});
const fixture = TestBed.createComponent<SelectorMainComp>(SelectorMainComp);
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('Hello world!');
expect(xDirectives).toEqual(1);
});
it('should ignore synthesized attributes (e.g. ngTrackBy)', () => {
@Component(
{selector: 'selector-proj', template: '<ng-content select="[ngTrackBy]"></ng-content>'})
class SelectedNgContentComp {
}
@Component({
selector: 'main-selector',
template:
'inline(<selector-proj><div *ngFor="let item of items trackBy getItemId">{{item.name}}</div></selector-proj>)' +
'ng-template(<selector-proj><ng-template ngFor [ngForOf]="items" let-item ngTrackBy="getItemId"><div>{{item.name}}</div></ng-template></selector-proj>)'
})
class SelectorMainComp {
items = [
{id: 1, name: 'one'},
{id: 2, name: 'two'},
{id: 3, name: 'three'},
];
getItemId(item: {id: number}) { return item.id; }
}
TestBed.configureTestingModule({declarations: [SelectedNgContentComp, SelectorMainComp]});
const fixture = TestBed.createComponent<SelectorMainComp>(SelectorMainComp);
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('inline()ng-template(onetwothree)');
});
describe('on containers', () => {
it('should work when matching attributes', () => {
let xDirectives = 0;
@Component({selector: 'selector-proj', template: '<ng-content select="[x]"></ng-content>'})
class SelectedNgContentComp {
}
@Directive({selector: '[x]'})
class XDirective {
constructor() { xDirectives++; }
}
@Component({
selector: 'main-selector',
template:
'<selector-proj><ng-container x="true">Hello world!</ng-container></selector-proj>'
})
class SelectorMainComp {
}
TestBed.configureTestingModule(
{declarations: [XDirective, SelectedNgContentComp, SelectorMainComp]});
const fixture = TestBed.createComponent<SelectorMainComp>(SelectorMainComp);
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('Hello world!');
expect(xDirectives).toEqual(1);
});
it('should work when matching classes', () => {
let xDirectives = 0;
@Component({selector: 'selector-proj', template: '<ng-content select=".x"></ng-content>'})
class SelectedNgContentComp {
}
@Directive({selector: '.x'})
class XDirective {
constructor() { xDirectives++; }
}
@Component({
selector: 'main-selector',
template:
'<selector-proj><ng-container class="x">Hello world!</ng-container></selector-proj>'
})
class SelectorMainComp {
}
TestBed.configureTestingModule(
{declarations: [XDirective, SelectedNgContentComp, SelectorMainComp]});
const fixture = TestBed.createComponent<SelectorMainComp>(SelectorMainComp);
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('Hello world!');
expect(xDirectives).toEqual(1);
});
});
});
});