1264 lines
45 KiB
TypeScript
1264 lines
45 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {CommonModule} from '@angular/common';
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import {Component, ContentChild, ContentChildren, Directive, ElementRef, Input, QueryList, TemplateRef, Type, ViewChild, ViewChildren, ViewContainerRef, forwardRef} from '@angular/core';
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import {TestBed} from '@angular/core/testing';
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import {By} from '@angular/platform-browser';
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import {expect} from '@angular/platform-browser/testing/src/matchers';
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import {onlyInIvy} from '@angular/private/testing';
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describe('query logic', () => {
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beforeEach(() => {
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TestBed.configureTestingModule({
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declarations: [
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AppComp, QueryComp, SimpleCompA, SimpleCompB, StaticViewQueryComp, TextDirective,
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SubclassStaticViewQueryComp, StaticContentQueryComp, SubclassStaticContentQueryComp,
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QueryCompWithChanges, StaticContentQueryDir, SuperDirectiveQueryTarget, SuperDirective,
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SubComponent
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]
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});
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});
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describe('view queries', () => {
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it('should return Component instances when Components are labeled and retrieved', () => {
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const template = `
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<div><simple-comp-a #viewQuery></simple-comp-a></div>
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<div><simple-comp-b #viewQuery></simple-comp-b></div>
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`;
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const fixture = initWithTemplate(QueryComp, template);
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const comp = fixture.componentInstance;
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expect(comp.viewChild).toBeAnInstanceOf(SimpleCompA);
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expect(comp.viewChildren.first).toBeAnInstanceOf(SimpleCompA);
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expect(comp.viewChildren.last).toBeAnInstanceOf(SimpleCompB);
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});
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it('should return ElementRef when HTML element is labeled and retrieved', () => {
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const template = `
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<div #viewQuery></div>
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`;
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const fixture = initWithTemplate(QueryComp, template);
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const comp = fixture.componentInstance;
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expect(comp.viewChild).toBeAnInstanceOf(ElementRef);
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expect(comp.viewChildren.first).toBeAnInstanceOf(ElementRef);
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});
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onlyInIvy('multiple local refs are supported in Ivy')
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.it('should return ElementRefs when HTML elements are labeled and retrieved', () => {
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const template = `
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<div #viewQuery #first>A</div>
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<div #viewQuery #second>B</div>
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`;
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const fixture = initWithTemplate(QueryComp, template);
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const comp = fixture.componentInstance;
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expect(comp.viewChild).toBeAnInstanceOf(ElementRef);
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expect(comp.viewChild.nativeElement).toBe(fixture.debugElement.children[0].nativeElement);
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expect(comp.viewChildren.first).toBeAnInstanceOf(ElementRef);
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expect(comp.viewChildren.last).toBeAnInstanceOf(ElementRef);
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expect(comp.viewChildren.length).toBe(2);
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});
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it('should return TemplateRef when template is labeled and retrieved', () => {
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const template = `
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<ng-template #viewQuery></ng-template>
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`;
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const fixture = initWithTemplate(QueryComp, template);
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const comp = fixture.componentInstance;
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expect(comp.viewChildren.first).toBeAnInstanceOf(TemplateRef);
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});
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onlyInIvy('multiple local refs are supported in Ivy')
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.it('should return TemplateRefs when templates are labeled and retrieved', () => {
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const template = `
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<ng-template #viewQuery></ng-template>
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<ng-template #viewQuery></ng-template>
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`;
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const fixture = initWithTemplate(QueryComp, template);
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const comp = fixture.componentInstance;
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expect(comp.viewChild).toBeAnInstanceOf(TemplateRef);
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expect(comp.viewChild.elementRef.nativeElement)
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.toBe(fixture.debugElement.childNodes[0].nativeNode);
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expect(comp.viewChildren.first).toBeAnInstanceOf(TemplateRef);
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expect(comp.viewChildren.last).toBeAnInstanceOf(TemplateRef);
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expect(comp.viewChildren.length).toBe(2);
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});
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it('should set static view child queries in creation mode (and just in creation mode)', () => {
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const fixture = TestBed.createComponent(StaticViewQueryComp);
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const component = fixture.componentInstance;
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// static ViewChild query should be set in creation mode, before CD runs
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expect(component.textDir).toBeAnInstanceOf(TextDirective);
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expect(component.textDir.text).toEqual('');
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expect(component.setEvents).toEqual(['textDir set']);
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// dynamic ViewChild query should not have been resolved yet
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expect(component.foo).not.toBeDefined();
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const span = fixture.nativeElement.querySelector('span');
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fixture.detectChanges();
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expect(component.textDir.text).toEqual('some text');
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expect(component.foo.nativeElement).toBe(span);
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expect(component.setEvents).toEqual(['textDir set', 'foo set']);
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});
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it('should support static view child queries inherited from superclasses', () => {
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const fixture = TestBed.createComponent(SubclassStaticViewQueryComp);
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const component = fixture.componentInstance;
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const divs = fixture.nativeElement.querySelectorAll('div');
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const spans = fixture.nativeElement.querySelectorAll('span');
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// static ViewChild queries should be set in creation mode, before CD runs
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expect(component.textDir).toBeAnInstanceOf(TextDirective);
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expect(component.textDir.text).toEqual('');
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expect(component.bar.nativeElement).toEqual(divs[1]);
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// dynamic ViewChild queries should not have been resolved yet
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expect(component.foo).not.toBeDefined();
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expect(component.baz).not.toBeDefined();
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fixture.detectChanges();
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expect(component.textDir.text).toEqual('some text');
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expect(component.foo.nativeElement).toBe(spans[0]);
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expect(component.baz.nativeElement).toBe(spans[1]);
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});
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it('should support multiple static view queries (multiple template passes)', () => {
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const template = `
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<static-view-query-comp></static-view-query-comp>
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<static-view-query-comp></static-view-query-comp>
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`;
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TestBed.overrideComponent(AppComp, {set: new Component({template})});
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const fixture = TestBed.createComponent(AppComp);
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const firstComponent = fixture.debugElement.children[0].injector.get(StaticViewQueryComp);
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const secondComponent = fixture.debugElement.children[1].injector.get(StaticViewQueryComp);
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// static ViewChild query should be set in creation mode, before CD runs
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expect(firstComponent.textDir).toBeAnInstanceOf(TextDirective);
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expect(secondComponent.textDir).toBeAnInstanceOf(TextDirective);
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expect(firstComponent.textDir.text).toEqual('');
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expect(secondComponent.textDir.text).toEqual('');
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expect(firstComponent.setEvents).toEqual(['textDir set']);
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expect(secondComponent.setEvents).toEqual(['textDir set']);
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// dynamic ViewChild query should not have been resolved yet
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expect(firstComponent.foo).not.toBeDefined();
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expect(secondComponent.foo).not.toBeDefined();
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const spans = fixture.nativeElement.querySelectorAll('span');
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fixture.detectChanges();
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expect(firstComponent.textDir.text).toEqual('some text');
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expect(secondComponent.textDir.text).toEqual('some text');
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expect(firstComponent.foo.nativeElement).toBe(spans[0]);
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expect(secondComponent.foo.nativeElement).toBe(spans[1]);
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expect(firstComponent.setEvents).toEqual(['textDir set', 'foo set']);
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expect(secondComponent.setEvents).toEqual(['textDir set', 'foo set']);
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});
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it('should allow for view queries to be inherited from a directive', () => {
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const fixture = TestBed.createComponent(SubComponent);
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const comp = fixture.componentInstance;
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fixture.detectChanges();
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expect(comp.headers).toBeTruthy();
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expect(comp.headers.length).toBe(2);
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expect(comp.headers.toArray().every(result => result instanceof SuperDirectiveQueryTarget))
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.toBe(true);
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});
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it('should support ViewChild query inherited from undecorated superclasses', () => {
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class MyComp {
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@ViewChild('foo', {static: false}) foo: any;
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}
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@Component({selector: 'sub-comp', template: '<div #foo></div>'})
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class SubComp extends MyComp {
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}
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TestBed.configureTestingModule({declarations: [SubComp]});
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const fixture = TestBed.createComponent(SubComp);
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fixture.detectChanges();
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expect(fixture.componentInstance.foo).toBeAnInstanceOf(ElementRef);
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});
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it('should support ViewChild query inherited from undecorated grand superclasses', () => {
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class MySuperComp {
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@ViewChild('foo', {static: false}) foo: any;
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}
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class MyComp extends MySuperComp {}
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@Component({selector: 'sub-comp', template: '<div #foo></div>'})
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class SubComp extends MyComp {
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}
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TestBed.configureTestingModule({declarations: [SubComp]});
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const fixture = TestBed.createComponent(SubComp);
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fixture.detectChanges();
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expect(fixture.componentInstance.foo).toBeAnInstanceOf(ElementRef);
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});
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it('should support ViewChildren query inherited from undecorated superclasses', () => {
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@Directive({selector: '[some-dir]'})
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class SomeDir {
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}
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class MyComp {
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@ViewChildren(SomeDir) foo !: QueryList<SomeDir>;
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}
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@Component({
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selector: 'sub-comp',
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template: `
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<div some-dir></div>
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<div some-dir></div>
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`
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})
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class SubComp extends MyComp {
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}
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TestBed.configureTestingModule({declarations: [SubComp, SomeDir]});
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const fixture = TestBed.createComponent(SubComp);
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fixture.detectChanges();
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expect(fixture.componentInstance.foo).toBeAnInstanceOf(QueryList);
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expect(fixture.componentInstance.foo.length).toBe(2);
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});
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it('should support ViewChildren query inherited from undecorated grand superclasses', () => {
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@Directive({selector: '[some-dir]'})
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class SomeDir {
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}
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class MySuperComp {
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@ViewChildren(SomeDir) foo !: QueryList<SomeDir>;
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}
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class MyComp extends MySuperComp {}
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@Component({
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selector: 'sub-comp',
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template: `
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<div some-dir></div>
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<div some-dir></div>
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`
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})
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class SubComp extends MyComp {
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}
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TestBed.configureTestingModule({declarations: [SubComp, SomeDir]});
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const fixture = TestBed.createComponent(SubComp);
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fixture.detectChanges();
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expect(fixture.componentInstance.foo).toBeAnInstanceOf(QueryList);
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expect(fixture.componentInstance.foo.length).toBe(2);
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});
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});
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describe('content queries', () => {
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it('should return Component instance when Component is labeled and retrieved', () => {
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const template = `
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<local-ref-query-component #q>
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<simple-comp-a #contentQuery></simple-comp-a>
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</local-ref-query-component>
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`;
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const fixture = initWithTemplate(AppComp, template);
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const comp = fixture.debugElement.children[0].references['q'];
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expect(comp.contentChild).toBeAnInstanceOf(SimpleCompA);
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expect(comp.contentChildren.first).toBeAnInstanceOf(SimpleCompA);
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});
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onlyInIvy('multiple local refs are supported in Ivy')
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.it('should return Component instances when Components are labeled and retrieved', () => {
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const template = `
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<local-ref-query-component #q>
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<simple-comp-a #contentQuery></simple-comp-a>
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<simple-comp-b #contentQuery></simple-comp-b>
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</local-ref-query-component>
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`;
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const fixture = initWithTemplate(AppComp, template);
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const comp = fixture.debugElement.children[0].references['q'];
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expect(comp.contentChild).toBeAnInstanceOf(SimpleCompA);
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expect(comp.contentChildren.first).toBeAnInstanceOf(SimpleCompA);
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expect(comp.contentChildren.last).toBeAnInstanceOf(SimpleCompB);
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expect(comp.contentChildren.length).toBe(2);
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});
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it('should return ElementRef when HTML element is labeled and retrieved', () => {
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const template = `
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<local-ref-query-component #q>
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<div #contentQuery></div>
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</local-ref-query-component>
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`;
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const fixture = initWithTemplate(AppComp, template);
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const comp = fixture.debugElement.children[0].references['q'];
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expect(comp.contentChildren.first).toBeAnInstanceOf(ElementRef);
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});
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onlyInIvy('multiple local refs are supported in Ivy')
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.it('should return ElementRefs when HTML elements are labeled and retrieved', () => {
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const template = `
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<local-ref-query-component #q>
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<div #contentQuery></div>
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<div #contentQuery></div>
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</local-ref-query-component>
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`;
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const fixture = initWithTemplate(AppComp, template);
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const firstChild = fixture.debugElement.children[0];
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const comp = firstChild.references['q'];
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expect(comp.contentChild).toBeAnInstanceOf(ElementRef);
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expect(comp.contentChild.nativeElement).toBe(firstChild.children[0].nativeElement);
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expect(comp.contentChildren.first).toBeAnInstanceOf(ElementRef);
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expect(comp.contentChildren.last).toBeAnInstanceOf(ElementRef);
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expect(comp.contentChildren.length).toBe(2);
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});
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it('should return TemplateRef when template is labeled and retrieved', () => {
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const template = `
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<local-ref-query-component #q>
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<ng-template #contentQuery></ng-template>
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</local-ref-query-component>
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`;
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const fixture = initWithTemplate(AppComp, template);
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const comp = fixture.debugElement.children[0].references['q'];
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expect(comp.contentChildren.first).toBeAnInstanceOf(TemplateRef);
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});
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onlyInIvy('multiple local refs are supported in Ivy')
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.it('should return TemplateRefs when templates are labeled and retrieved', () => {
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const template = `
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<local-ref-query-component #q>
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<ng-template #contentQuery></ng-template>
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<ng-template #contentQuery></ng-template>
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</local-ref-query-component>
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`;
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const fixture = initWithTemplate(AppComp, template);
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const firstChild = fixture.debugElement.children[0];
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const comp = firstChild.references['q'];
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expect(comp.contentChild).toBeAnInstanceOf(TemplateRef);
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expect(comp.contentChild.elementRef.nativeElement)
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.toBe(firstChild.childNodes[0].nativeNode);
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expect(comp.contentChildren.first).toBeAnInstanceOf(TemplateRef);
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expect(comp.contentChildren.last).toBeAnInstanceOf(TemplateRef);
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expect(comp.contentChildren.length).toBe(2);
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});
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it('should set static content child queries in creation mode (and just in creation mode)',
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() => {
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const template = `
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<static-content-query-comp>
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<div [text]="text"></div>
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<span #foo></span>
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</static-content-query-comp>
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`;
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TestBed.overrideComponent(AppComp, {set: new Component({template})});
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const fixture = TestBed.createComponent(AppComp);
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const component = fixture.debugElement.children[0].injector.get(StaticContentQueryComp);
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// static ContentChild query should be set in creation mode, before CD runs
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expect(component.textDir).toBeAnInstanceOf(TextDirective);
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expect(component.textDir.text).toEqual('');
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expect(component.setEvents).toEqual(['textDir set']);
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// dynamic ContentChild query should not have been resolved yet
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expect(component.foo).not.toBeDefined();
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const span = fixture.nativeElement.querySelector('span');
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(fixture.componentInstance as any).text = 'some text';
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fixture.detectChanges();
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expect(component.textDir.text).toEqual('some text');
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expect(component.foo.nativeElement).toBe(span);
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expect(component.setEvents).toEqual(['textDir set', 'foo set']);
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});
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it('should support static content child queries inherited from superclasses', () => {
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const template = `
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<subclass-static-content-query-comp>
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<div [text]="text"></div>
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<span #foo></span>
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<div #bar></div>
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<span #baz></span>
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</subclass-static-content-query-comp>
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`;
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TestBed.overrideComponent(AppComp, {set: new Component({template})});
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const fixture = TestBed.createComponent(AppComp);
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const component =
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fixture.debugElement.children[0].injector.get(SubclassStaticContentQueryComp);
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const divs = fixture.nativeElement.querySelectorAll('div');
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const spans = fixture.nativeElement.querySelectorAll('span');
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// static ContentChild queries should be set in creation mode, before CD runs
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expect(component.textDir).toBeAnInstanceOf(TextDirective);
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expect(component.textDir.text).toEqual('');
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expect(component.bar.nativeElement).toEqual(divs[1]);
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// dynamic ContentChild queries should not have been resolved yet
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expect(component.foo).not.toBeDefined();
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expect(component.baz).not.toBeDefined();
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(fixture.componentInstance as any).text = 'some text';
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fixture.detectChanges();
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expect(component.textDir.text).toEqual('some text');
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expect(component.foo.nativeElement).toBe(spans[0]);
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expect(component.baz.nativeElement).toBe(spans[1]);
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});
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it('should set static content child queries on directives', () => {
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const template = `
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<div staticContentQueryDir>
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<div [text]="text"></div>
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<span #foo></span>
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</div>
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`;
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TestBed.overrideComponent(AppComp, {set: new Component({template})});
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const fixture = TestBed.createComponent(AppComp);
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const component = fixture.debugElement.children[0].injector.get(StaticContentQueryDir);
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// static ContentChild query should be set in creation mode, before CD runs
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expect(component.textDir).toBeAnInstanceOf(TextDirective);
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expect(component.textDir.text).toEqual('');
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expect(component.setEvents).toEqual(['textDir set']);
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// dynamic ContentChild query should not have been resolved yet
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expect(component.foo).not.toBeDefined();
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const span = fixture.nativeElement.querySelector('span');
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(fixture.componentInstance as any).text = 'some text';
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fixture.detectChanges();
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expect(component.textDir.text).toEqual('some text');
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expect(component.foo.nativeElement).toBe(span);
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expect(component.setEvents).toEqual(['textDir set', 'foo set']);
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});
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it('should support multiple content query components (multiple template passes)', () => {
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const template = `
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<static-content-query-comp>
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<div [text]="text"></div>
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<span #foo></span>
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</static-content-query-comp>
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<static-content-query-comp>
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<div [text]="text"></div>
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<span #foo></span>
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</static-content-query-comp>
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`;
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TestBed.overrideComponent(AppComp, {set: new Component({template})});
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const fixture = TestBed.createComponent(AppComp);
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const firstComponent = fixture.debugElement.children[0].injector.get(StaticContentQueryComp);
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const secondComponent = fixture.debugElement.children[1].injector.get(StaticContentQueryComp);
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// static ContentChild query should be set in creation mode, before CD runs
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expect(firstComponent.textDir).toBeAnInstanceOf(TextDirective);
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expect(secondComponent.textDir).toBeAnInstanceOf(TextDirective);
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expect(firstComponent.textDir.text).toEqual('');
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expect(secondComponent.textDir.text).toEqual('');
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expect(firstComponent.setEvents).toEqual(['textDir set']);
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expect(secondComponent.setEvents).toEqual(['textDir set']);
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// dynamic ContentChild query should not have been resolved yet
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expect(firstComponent.foo).not.toBeDefined();
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expect(secondComponent.foo).not.toBeDefined();
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|
|
const spans = fixture.nativeElement.querySelectorAll('span');
|
|
(fixture.componentInstance as any).text = 'some text';
|
|
fixture.detectChanges();
|
|
|
|
expect(firstComponent.textDir.text).toEqual('some text');
|
|
expect(secondComponent.textDir.text).toEqual('some text');
|
|
|
|
expect(firstComponent.foo.nativeElement).toBe(spans[0]);
|
|
expect(secondComponent.foo.nativeElement).toBe(spans[1]);
|
|
|
|
expect(firstComponent.setEvents).toEqual(['textDir set', 'foo set']);
|
|
expect(secondComponent.setEvents).toEqual(['textDir set', 'foo set']);
|
|
});
|
|
|
|
it('should support ContentChild query inherited from undecorated superclasses', () => {
|
|
class MyComp {
|
|
@ContentChild('foo', {static: false}) foo: any;
|
|
}
|
|
|
|
@Component({selector: 'sub-comp', template: '<ng-content></ng-content>'})
|
|
class SubComp extends MyComp {
|
|
}
|
|
|
|
@Component({template: '<sub-comp><div #foo></div></sub-comp>'})
|
|
class App {
|
|
@ViewChild(SubComp, {static: false}) subComp !: SubComp;
|
|
}
|
|
|
|
TestBed.configureTestingModule({declarations: [App, SubComp]});
|
|
const fixture = TestBed.createComponent(App);
|
|
fixture.detectChanges();
|
|
|
|
expect(fixture.componentInstance.subComp.foo).toBeAnInstanceOf(ElementRef);
|
|
});
|
|
|
|
it('should support ContentChild query inherited from undecorated grand superclasses', () => {
|
|
class MySuperComp {
|
|
@ContentChild('foo', {static: false}) foo: any;
|
|
}
|
|
|
|
class MyComp extends MySuperComp {}
|
|
|
|
@Component({selector: 'sub-comp', template: '<ng-content></ng-content>'})
|
|
class SubComp extends MyComp {
|
|
}
|
|
|
|
@Component({template: '<sub-comp><div #foo></div></sub-comp>'})
|
|
class App {
|
|
@ViewChild(SubComp, {static: false}) subComp !: SubComp;
|
|
}
|
|
|
|
TestBed.configureTestingModule({declarations: [App, SubComp]});
|
|
const fixture = TestBed.createComponent(App);
|
|
fixture.detectChanges();
|
|
|
|
expect(fixture.componentInstance.subComp.foo).toBeAnInstanceOf(ElementRef);
|
|
});
|
|
|
|
it('should support ContentChildren query inherited from undecorated superclasses', () => {
|
|
@Directive({selector: '[some-dir]'})
|
|
class SomeDir {
|
|
}
|
|
|
|
class MyComp {
|
|
@ContentChildren(SomeDir) foo !: QueryList<SomeDir>;
|
|
}
|
|
|
|
@Component({selector: 'sub-comp', template: '<ng-content></ng-content>'})
|
|
class SubComp extends MyComp {
|
|
}
|
|
|
|
@Component({
|
|
template: `
|
|
<sub-comp>
|
|
<div some-dir></div>
|
|
<div some-dir></div>
|
|
</sub-comp>
|
|
`
|
|
})
|
|
class App {
|
|
@ViewChild(SubComp, {static: false}) subComp !: SubComp;
|
|
}
|
|
|
|
TestBed.configureTestingModule({declarations: [App, SubComp, SomeDir]});
|
|
const fixture = TestBed.createComponent(App);
|
|
fixture.detectChanges();
|
|
|
|
expect(fixture.componentInstance.subComp.foo).toBeAnInstanceOf(QueryList);
|
|
expect(fixture.componentInstance.subComp.foo.length).toBe(2);
|
|
});
|
|
|
|
it('should support ContentChildren query inherited from undecorated grand superclasses', () => {
|
|
@Directive({selector: '[some-dir]'})
|
|
class SomeDir {
|
|
}
|
|
|
|
class MySuperComp {
|
|
@ContentChildren(SomeDir) foo !: QueryList<SomeDir>;
|
|
}
|
|
|
|
class MyComp extends MySuperComp {}
|
|
|
|
@Component({selector: 'sub-comp', template: '<ng-content></ng-content>'})
|
|
class SubComp extends MyComp {
|
|
}
|
|
|
|
@Component({
|
|
template: `
|
|
<sub-comp>
|
|
<div some-dir></div>
|
|
<div some-dir></div>
|
|
</sub-comp>
|
|
`
|
|
})
|
|
class App {
|
|
@ViewChild(SubComp, {static: false}) subComp !: SubComp;
|
|
}
|
|
|
|
TestBed.configureTestingModule({declarations: [App, SubComp, SomeDir]});
|
|
const fixture = TestBed.createComponent(App);
|
|
fixture.detectChanges();
|
|
|
|
expect(fixture.componentInstance.subComp.foo).toBeAnInstanceOf(QueryList);
|
|
expect(fixture.componentInstance.subComp.foo.length).toBe(2);
|
|
});
|
|
|
|
it('should match shallow content queries in views inserted / removed by ngIf', () => {
|
|
@Component({
|
|
selector: 'test-comp',
|
|
template: `
|
|
<shallow-comp>
|
|
<div *ngIf="showing" #foo></div>
|
|
</shallow-comp>
|
|
`
|
|
})
|
|
class TestComponent {
|
|
showing = false;
|
|
}
|
|
|
|
@Component({
|
|
selector: 'shallow-comp',
|
|
template: '',
|
|
})
|
|
class ShallowComp {
|
|
@ContentChildren('foo', {descendants: false}) foos !: QueryList<ElementRef>;
|
|
}
|
|
|
|
TestBed.configureTestingModule(
|
|
{declarations: [TestComponent, ShallowComp], imports: [CommonModule]});
|
|
const fixture = TestBed.createComponent(TestComponent);
|
|
fixture.detectChanges();
|
|
|
|
const shallowComp = fixture.debugElement.query(By.directive(ShallowComp)).componentInstance;
|
|
const queryList = shallowComp !.foos;
|
|
expect(queryList.length).toBe(0);
|
|
|
|
fixture.componentInstance.showing = true;
|
|
fixture.detectChanges();
|
|
expect(queryList.length).toBe(1);
|
|
|
|
fixture.componentInstance.showing = false;
|
|
fixture.detectChanges();
|
|
expect(queryList.length).toBe(0);
|
|
});
|
|
});
|
|
|
|
// Some root components may have ContentChildren queries if they are also
|
|
// usable as a child component. We should still generate an empty QueryList
|
|
// for these queries when they are at root for backwards compatibility with
|
|
// ViewEngine.
|
|
it('should generate an empty QueryList for root components', () => {
|
|
const fixture = TestBed.createComponent(QueryComp);
|
|
fixture.detectChanges();
|
|
expect(fixture.componentInstance.contentChildren).toBeAnInstanceOf(QueryList);
|
|
expect(fixture.componentInstance.contentChildren.length).toBe(0);
|
|
});
|
|
|
|
describe('descendants', () => {
|
|
|
|
it('should match directives on elements that used to be wrapped by a required parent in HTML parser',
|
|
() => {
|
|
|
|
@Directive({selector: '[myDef]'})
|
|
class MyDef {
|
|
}
|
|
|
|
@Component({selector: 'my-container', template: ``})
|
|
class MyContainer {
|
|
@ContentChildren(MyDef) myDefs !: QueryList<MyDef>;
|
|
}
|
|
@Component(
|
|
{selector: 'test-cmpt', template: `<my-container><tr myDef></tr></my-container>`})
|
|
class TestCmpt {
|
|
}
|
|
|
|
TestBed.configureTestingModule({declarations: [TestCmpt, MyContainer, MyDef]});
|
|
const fixture = TestBed.createComponent(TestCmpt);
|
|
const cmptWithQuery = fixture.debugElement.children[0].injector.get(MyContainer);
|
|
|
|
fixture.detectChanges();
|
|
expect(cmptWithQuery.myDefs.length).toBe(1);
|
|
});
|
|
});
|
|
|
|
describe('observable interface', () => {
|
|
|
|
it('should allow observing changes to query list', () => {
|
|
const fixture = TestBed.createComponent(QueryCompWithChanges);
|
|
let changes = 0;
|
|
fixture.detectChanges();
|
|
|
|
fixture.componentInstance.foos.changes.subscribe((value: any) => {
|
|
changes += 1;
|
|
expect(value).toBe(fixture.componentInstance.foos);
|
|
});
|
|
|
|
// refresh without setting dirty - no emit
|
|
fixture.detectChanges();
|
|
expect(changes).toBe(0);
|
|
|
|
// refresh with setting dirty - emit
|
|
fixture.componentInstance.showing = true;
|
|
fixture.detectChanges();
|
|
expect(changes).toBe(1);
|
|
});
|
|
|
|
});
|
|
|
|
describe('view boundaries', () => {
|
|
|
|
describe('ViewContainerRef', () => {
|
|
|
|
@Directive({selector: '[vc]', exportAs: 'vc'})
|
|
class ViewContainerManipulatorDirective {
|
|
constructor(private _vcRef: ViewContainerRef) {}
|
|
|
|
insertTpl(tpl: TemplateRef<{}>, ctx: {}, idx?: number) {
|
|
this._vcRef.createEmbeddedView(tpl, ctx, idx);
|
|
}
|
|
|
|
remove(index?: number) { this._vcRef.remove(index); }
|
|
}
|
|
|
|
it('should report results in views inserted / removed by ngIf', () => {
|
|
@Component({
|
|
selector: 'test-comp',
|
|
template: `
|
|
<ng-template [ngIf]="value">
|
|
<div #foo></div>
|
|
</ng-template>
|
|
`
|
|
})
|
|
class TestComponent {
|
|
value: boolean = false;
|
|
@ViewChildren('foo') query !: QueryList<any>;
|
|
}
|
|
|
|
TestBed.configureTestingModule({declarations: [TestComponent]});
|
|
|
|
const fixture = TestBed.createComponent(TestComponent);
|
|
fixture.detectChanges();
|
|
|
|
const queryList = fixture.componentInstance.query;
|
|
expect(queryList.length).toBe(0);
|
|
|
|
fixture.componentInstance.value = true;
|
|
fixture.detectChanges();
|
|
expect(queryList.length).toBe(1);
|
|
|
|
fixture.componentInstance.value = false;
|
|
fixture.detectChanges();
|
|
expect(queryList.length).toBe(0);
|
|
});
|
|
|
|
it('should report results in views inserted / removed by ngFor', () => {
|
|
@Component({
|
|
selector: 'test-comp',
|
|
template: `
|
|
<ng-template ngFor let-item [ngForOf]="value">
|
|
<div #foo [id]="item"></div>
|
|
</ng-template>
|
|
`,
|
|
})
|
|
class TestComponent {
|
|
value: string[]|undefined;
|
|
@ViewChildren('foo') query !: QueryList<any>;
|
|
}
|
|
|
|
TestBed.configureTestingModule({declarations: [TestComponent]});
|
|
const fixture = TestBed.createComponent(TestComponent);
|
|
fixture.detectChanges();
|
|
|
|
const queryList = fixture.componentInstance.query;
|
|
expect(queryList.length).toBe(0);
|
|
|
|
fixture.componentInstance.value = ['a', 'b', 'c'];
|
|
fixture.detectChanges();
|
|
expect(queryList.length).toBe(3);
|
|
|
|
// Remove the "b" element from the value.
|
|
fixture.componentInstance.value.splice(1, 1);
|
|
fixture.detectChanges();
|
|
expect(queryList.length).toBe(2);
|
|
|
|
// make sure that the "b" element has been removed from query results
|
|
expect(queryList.first.nativeElement.id).toBe('a');
|
|
expect(queryList.last.nativeElement.id).toBe('c');
|
|
});
|
|
|
|
it('should support a mix of content queries from the declaration and embedded view', () => {
|
|
@Directive({selector: '[query-for-lots-of-content]'})
|
|
class QueryForLotsOfContent {
|
|
@ContentChildren('foo', {descendants: true}) foos1 !: QueryList<ElementRef>;
|
|
@ContentChildren('foo', {descendants: true}) foos2 !: QueryList<ElementRef>;
|
|
}
|
|
|
|
@Directive({selector: '[query-for-content]'})
|
|
class QueryForContent {
|
|
@ContentChildren('foo') foos !: QueryList<ElementRef>;
|
|
}
|
|
|
|
@Component({
|
|
selector: 'test-comp',
|
|
template: `
|
|
<div query-for-lots-of-content>
|
|
<ng-template ngFor let-item [ngForOf]="items">
|
|
<div query-for-content>
|
|
<span #foo></span>
|
|
</div>
|
|
</ng-template>
|
|
</div>
|
|
`
|
|
})
|
|
class TestComponent {
|
|
items = [1, 2];
|
|
}
|
|
|
|
TestBed.configureTestingModule(
|
|
{declarations: [TestComponent, QueryForContent, QueryForLotsOfContent]});
|
|
|
|
const fixture = TestBed.createComponent(TestComponent);
|
|
fixture.detectChanges();
|
|
|
|
const lotsOfContentEl = fixture.debugElement.query(By.directive(QueryForLotsOfContent));
|
|
const lotsOfContentInstance = lotsOfContentEl.injector.get(QueryForLotsOfContent);
|
|
|
|
const contentEl = fixture.debugElement.query(By.directive(QueryForContent));
|
|
const contentInstance = contentEl.injector.get(QueryForContent);
|
|
|
|
expect(lotsOfContentInstance.foos1.length).toBe(2);
|
|
expect(lotsOfContentInstance.foos2.length).toBe(2);
|
|
expect(contentInstance.foos.length).toBe(1);
|
|
|
|
fixture.componentInstance.items = [];
|
|
fixture.detectChanges();
|
|
expect(lotsOfContentInstance.foos1.length).toBe(0);
|
|
expect(lotsOfContentInstance.foos2.length).toBe(0);
|
|
});
|
|
|
|
// https://stackblitz.com/edit/angular-rrmmuf?file=src/app/app.component.ts
|
|
it('should report results when different instances of TemplateRef are inserted into one ViewContainerRefs',
|
|
() => {
|
|
@Component({
|
|
selector: 'test-comp',
|
|
template: `
|
|
<ng-template #tpl1 let-idx="idx">
|
|
<div #foo [id]="'foo1_' + idx"></div>
|
|
</ng-template>
|
|
|
|
<div #foo id="middle"></div>
|
|
|
|
<ng-template #tpl2 let-idx="idx">
|
|
<div #foo [id]="'foo2_' + idx"></div>
|
|
</ng-template>
|
|
|
|
<ng-template vc></ng-template>
|
|
`,
|
|
})
|
|
class TestComponent {
|
|
@ViewChild(ViewContainerManipulatorDirective, {static: false})
|
|
vc !: ViewContainerManipulatorDirective;
|
|
@ViewChild('tpl1', {static: false}) tpl1 !: TemplateRef<any>;
|
|
@ViewChild('tpl2', {static: false}) tpl2 !: TemplateRef<any>;
|
|
@ViewChildren('foo') query !: QueryList<any>;
|
|
}
|
|
|
|
TestBed.configureTestingModule(
|
|
{declarations: [ViewContainerManipulatorDirective, TestComponent]});
|
|
const fixture = TestBed.createComponent(TestComponent);
|
|
fixture.detectChanges();
|
|
|
|
const queryList = fixture.componentInstance.query;
|
|
const {tpl1, tpl2, vc} = fixture.componentInstance;
|
|
|
|
expect(queryList.length).toBe(1);
|
|
expect(queryList.first.nativeElement.getAttribute('id')).toBe('middle');
|
|
|
|
vc.insertTpl(tpl1 !, {idx: 0}, 0);
|
|
vc.insertTpl(tpl2 !, {idx: 1}, 1);
|
|
fixture.detectChanges();
|
|
|
|
expect(queryList.length).toBe(3);
|
|
let qListArr = queryList.toArray();
|
|
expect(qListArr[0].nativeElement.getAttribute('id')).toBe('foo1_0');
|
|
expect(qListArr[1].nativeElement.getAttribute('id')).toBe('middle');
|
|
expect(qListArr[2].nativeElement.getAttribute('id')).toBe('foo2_1');
|
|
|
|
vc.insertTpl(tpl1 !, {idx: 1}, 1);
|
|
fixture.detectChanges();
|
|
|
|
expect(queryList.length).toBe(4);
|
|
qListArr = queryList.toArray();
|
|
expect(qListArr[0].nativeElement.getAttribute('id')).toBe('foo1_0');
|
|
expect(qListArr[1].nativeElement.getAttribute('id')).toBe('foo1_1');
|
|
expect(qListArr[2].nativeElement.getAttribute('id')).toBe('middle');
|
|
expect(qListArr[3].nativeElement.getAttribute('id')).toBe('foo2_1');
|
|
|
|
vc.remove(1);
|
|
fixture.detectChanges();
|
|
|
|
expect(queryList.length).toBe(3);
|
|
qListArr = queryList.toArray();
|
|
expect(qListArr[0].nativeElement.getAttribute('id')).toBe('foo1_0');
|
|
expect(qListArr[1].nativeElement.getAttribute('id')).toBe('middle');
|
|
expect(qListArr[2].nativeElement.getAttribute('id')).toBe('foo2_1');
|
|
|
|
vc.remove(1);
|
|
fixture.detectChanges();
|
|
|
|
expect(queryList.length).toBe(2);
|
|
qListArr = queryList.toArray();
|
|
expect(qListArr[0].nativeElement.getAttribute('id')).toBe('foo1_0');
|
|
expect(qListArr[1].nativeElement.getAttribute('id')).toBe('middle');
|
|
});
|
|
|
|
// https://stackblitz.com/edit/angular-7vvo9j?file=src%2Fapp%2Fapp.component.ts
|
|
// https://stackblitz.com/edit/angular-xzwp6n
|
|
it('should report results when the same TemplateRef is inserted into different ViewContainerRefs',
|
|
() => {
|
|
@Component({
|
|
selector: 'test-comp',
|
|
template: `
|
|
<ng-template #tpl let-idx="idx" let-container_idx="container_idx">
|
|
<div #foo [id]="'foo_' + container_idx + '_' + idx"></div>
|
|
</ng-template>
|
|
|
|
<ng-template vc #vi0="vc"></ng-template>
|
|
<ng-template vc #vi1="vc"></ng-template>
|
|
`,
|
|
})
|
|
class TestComponent {
|
|
@ViewChild('tpl', {static: false}) tpl !: TemplateRef<any>;
|
|
@ViewChild('vi0', {static: false}) vi0 !: ViewContainerManipulatorDirective;
|
|
@ViewChild('vi1', {static: false}) vi1 !: ViewContainerManipulatorDirective;
|
|
@ViewChildren('foo') query !: QueryList<any>;
|
|
}
|
|
|
|
TestBed.configureTestingModule(
|
|
{declarations: [ViewContainerManipulatorDirective, TestComponent]});
|
|
const fixture = TestBed.createComponent(TestComponent);
|
|
fixture.detectChanges();
|
|
|
|
const queryList = fixture.componentInstance.query;
|
|
const {tpl, vi0, vi1} = fixture.componentInstance;
|
|
|
|
expect(queryList.length).toBe(0);
|
|
|
|
vi0.insertTpl(tpl !, {idx: 0, container_idx: 0}, 0);
|
|
vi1.insertTpl(tpl !, {idx: 0, container_idx: 1}, 0);
|
|
fixture.detectChanges();
|
|
|
|
expect(queryList.length).toBe(2);
|
|
let qListArr = queryList.toArray();
|
|
expect(qListArr[0].nativeElement.getAttribute('id')).toBe('foo_0_0');
|
|
expect(qListArr[1].nativeElement.getAttribute('id')).toBe('foo_1_0');
|
|
|
|
vi0.remove();
|
|
fixture.detectChanges();
|
|
|
|
expect(queryList.length).toBe(1);
|
|
qListArr = queryList.toArray();
|
|
expect(qListArr[0].nativeElement.getAttribute('id')).toBe('foo_1_0');
|
|
|
|
vi1.remove();
|
|
fixture.detectChanges();
|
|
expect(queryList.length).toBe(0);
|
|
});
|
|
|
|
// https://stackblitz.com/edit/angular-wpd6gv?file=src%2Fapp%2Fapp.component.ts
|
|
it('should report results from views inserted in a lifecycle hook', () => {
|
|
@Component({
|
|
selector: 'my-app',
|
|
template: `
|
|
<ng-template #tpl>
|
|
<span #foo id="from_tpl"></span>
|
|
</ng-template>
|
|
|
|
<ng-template [ngTemplateOutlet]="show ? tpl : null"></ng-template>
|
|
`,
|
|
})
|
|
class MyApp {
|
|
show = false;
|
|
@ViewChildren('foo') query !: QueryList<any>;
|
|
}
|
|
|
|
TestBed.configureTestingModule({declarations: [MyApp], imports: [CommonModule]});
|
|
const fixture = TestBed.createComponent(MyApp);
|
|
fixture.detectChanges();
|
|
|
|
const queryList = fixture.componentInstance.query;
|
|
expect(queryList.length).toBe(0);
|
|
|
|
fixture.componentInstance.show = true;
|
|
fixture.detectChanges();
|
|
expect(queryList.length).toBe(1);
|
|
expect(queryList.first.nativeElement.id).toBe('from_tpl');
|
|
|
|
fixture.componentInstance.show = false;
|
|
fixture.detectChanges();
|
|
expect(queryList.length).toBe(0);
|
|
});
|
|
|
|
});
|
|
});
|
|
|
|
describe('non-regression', () => {
|
|
|
|
it('should query by provider super-type in an embedded view', () => {
|
|
|
|
@Directive({selector: '[child]'})
|
|
class Child {
|
|
}
|
|
|
|
@Directive({selector: '[parent]', providers: [{provide: Child, useExisting: Parent}]})
|
|
class Parent extends Child {
|
|
}
|
|
|
|
@Component({
|
|
selector: 'test-cmpt',
|
|
template:
|
|
`<ng-template [ngIf]="true"><ng-template [ngIf]="true"><div parent></div></ng-template></ng-template>`
|
|
})
|
|
class TestCmpt {
|
|
@ViewChildren(Child) instances !: QueryList<Child>;
|
|
}
|
|
|
|
TestBed.configureTestingModule({declarations: [TestCmpt, Parent, Child]});
|
|
const fixture = TestBed.createComponent(TestCmpt);
|
|
fixture.detectChanges();
|
|
|
|
expect(fixture.componentInstance.instances.length).toBe(1);
|
|
});
|
|
|
|
it('should flatten multi-provider results', () => {
|
|
|
|
class MyClass {}
|
|
|
|
@Component({
|
|
selector: 'with-multi-provider',
|
|
template: '',
|
|
providers:
|
|
[{provide: MyClass, useExisting: forwardRef(() => WithMultiProvider), multi: true}]
|
|
})
|
|
class WithMultiProvider {
|
|
}
|
|
|
|
@Component({selector: 'test-cmpt', template: `<with-multi-provider></with-multi-provider>`})
|
|
class TestCmpt {
|
|
@ViewChildren(MyClass) queryResults !: QueryList<WithMultiProvider>;
|
|
}
|
|
|
|
TestBed.configureTestingModule({declarations: [TestCmpt, WithMultiProvider]});
|
|
const fixture = TestBed.createComponent(TestCmpt);
|
|
fixture.detectChanges();
|
|
|
|
expect(fixture.componentInstance.queryResults.length).toBe(1);
|
|
expect(fixture.componentInstance.queryResults.first).toBeAnInstanceOf(WithMultiProvider);
|
|
});
|
|
|
|
it('should flatten multi-provider results when crossing ng-template', () => {
|
|
|
|
class MyClass {}
|
|
|
|
@Component({
|
|
selector: 'with-multi-provider',
|
|
template: '',
|
|
providers:
|
|
[{provide: MyClass, useExisting: forwardRef(() => WithMultiProvider), multi: true}]
|
|
})
|
|
class WithMultiProvider {
|
|
}
|
|
|
|
@Component({
|
|
selector: 'test-cmpt',
|
|
template: `
|
|
<ng-template [ngIf]="true"><with-multi-provider></with-multi-provider></ng-template>
|
|
<with-multi-provider></with-multi-provider>
|
|
`
|
|
})
|
|
class TestCmpt {
|
|
@ViewChildren(MyClass) queryResults !: QueryList<WithMultiProvider>;
|
|
}
|
|
|
|
TestBed.configureTestingModule({declarations: [TestCmpt, WithMultiProvider]});
|
|
const fixture = TestBed.createComponent(TestCmpt);
|
|
fixture.detectChanges();
|
|
|
|
expect(fixture.componentInstance.queryResults.length).toBe(2);
|
|
expect(fixture.componentInstance.queryResults.first).toBeAnInstanceOf(WithMultiProvider);
|
|
expect(fixture.componentInstance.queryResults.last).toBeAnInstanceOf(WithMultiProvider);
|
|
});
|
|
|
|
|
|
});
|
|
|
|
});
|
|
|
|
function initWithTemplate(compType: Type<any>, template: string) {
|
|
TestBed.overrideComponent(compType, {set: new Component({template})});
|
|
const fixture = TestBed.createComponent(compType);
|
|
fixture.detectChanges();
|
|
return fixture;
|
|
}
|
|
|
|
@Component({selector: 'local-ref-query-component', template: '<ng-content></ng-content>'})
|
|
class QueryComp {
|
|
@ViewChild('viewQuery', {static: false}) viewChild !: any;
|
|
@ContentChild('contentQuery', {static: false}) contentChild !: any;
|
|
|
|
@ViewChildren('viewQuery') viewChildren !: QueryList<any>;
|
|
@ContentChildren('contentQuery') contentChildren !: QueryList<any>;
|
|
}
|
|
|
|
@Component({selector: 'app-comp', template: ``})
|
|
class AppComp {
|
|
}
|
|
|
|
@Component({selector: 'simple-comp-a', template: ''})
|
|
class SimpleCompA {
|
|
}
|
|
|
|
@Component({selector: 'simple-comp-b', template: ''})
|
|
class SimpleCompB {
|
|
}
|
|
|
|
@Directive({selector: '[text]'})
|
|
class TextDirective {
|
|
@Input() text = '';
|
|
}
|
|
|
|
@Component({
|
|
selector: 'static-view-query-comp',
|
|
template: `
|
|
<div [text]="text"></div>
|
|
<span #foo></span>
|
|
`
|
|
})
|
|
class StaticViewQueryComp {
|
|
private _textDir !: TextDirective;
|
|
private _foo !: ElementRef;
|
|
setEvents: string[] = [];
|
|
|
|
@ViewChild(TextDirective, {static: true})
|
|
get textDir(): TextDirective { return this._textDir; }
|
|
|
|
set textDir(value: TextDirective) {
|
|
this.setEvents.push('textDir set');
|
|
this._textDir = value;
|
|
}
|
|
|
|
@ViewChild('foo', {static: false})
|
|
get foo(): ElementRef { return this._foo; }
|
|
|
|
set foo(value: ElementRef) {
|
|
this.setEvents.push('foo set');
|
|
this._foo = value;
|
|
}
|
|
|
|
text = 'some text';
|
|
}
|
|
|
|
@Component({
|
|
selector: 'subclass-static-view-query-comp',
|
|
template: `
|
|
<div [text]="text"></div>
|
|
<span #foo></span>
|
|
|
|
<div #bar></div>
|
|
<span #baz></span>
|
|
`
|
|
})
|
|
class SubclassStaticViewQueryComp extends StaticViewQueryComp {
|
|
@ViewChild('bar', {static: true})
|
|
bar !: ElementRef;
|
|
|
|
@ViewChild('baz', {static: false})
|
|
baz !: ElementRef;
|
|
}
|
|
|
|
|
|
@Component({selector: 'static-content-query-comp', template: `<ng-content></ng-content>`})
|
|
class StaticContentQueryComp {
|
|
private _textDir !: TextDirective;
|
|
private _foo !: ElementRef;
|
|
setEvents: string[] = [];
|
|
|
|
@ContentChild(TextDirective, {static: true})
|
|
get textDir(): TextDirective { return this._textDir; }
|
|
|
|
set textDir(value: TextDirective) {
|
|
this.setEvents.push('textDir set');
|
|
this._textDir = value;
|
|
}
|
|
|
|
@ContentChild('foo', {static: false})
|
|
get foo(): ElementRef { return this._foo; }
|
|
|
|
set foo(value: ElementRef) {
|
|
this.setEvents.push('foo set');
|
|
this._foo = value;
|
|
}
|
|
}
|
|
|
|
@Directive({selector: '[staticContentQueryDir]'})
|
|
class StaticContentQueryDir {
|
|
private _textDir !: TextDirective;
|
|
private _foo !: ElementRef;
|
|
setEvents: string[] = [];
|
|
|
|
@ContentChild(TextDirective, {static: true})
|
|
get textDir(): TextDirective { return this._textDir; }
|
|
|
|
set textDir(value: TextDirective) {
|
|
this.setEvents.push('textDir set');
|
|
this._textDir = value;
|
|
}
|
|
|
|
@ContentChild('foo', {static: false})
|
|
get foo(): ElementRef { return this._foo; }
|
|
|
|
set foo(value: ElementRef) {
|
|
this.setEvents.push('foo set');
|
|
this._foo = value;
|
|
}
|
|
}
|
|
|
|
@Component({selector: 'subclass-static-content-query-comp', template: `<ng-content></ng-content>`})
|
|
class SubclassStaticContentQueryComp extends StaticContentQueryComp {
|
|
@ContentChild('bar', {static: true})
|
|
bar !: ElementRef;
|
|
|
|
@ContentChild('baz', {static: false})
|
|
baz !: ElementRef;
|
|
}
|
|
|
|
@Component({
|
|
selector: 'query-with-changes',
|
|
template: `
|
|
<div *ngIf="showing" #foo></div>
|
|
`
|
|
})
|
|
export class QueryCompWithChanges {
|
|
@ViewChildren('foo') foos !: QueryList<any>;
|
|
|
|
showing = false;
|
|
}
|
|
|
|
@Component({selector: 'query-target', template: '<ng-content></ng-content>'})
|
|
class SuperDirectiveQueryTarget {
|
|
}
|
|
|
|
@Directive({selector: '[super-directive]'})
|
|
class SuperDirective {
|
|
@ViewChildren(SuperDirectiveQueryTarget) headers !: QueryList<SuperDirectiveQueryTarget>;
|
|
}
|
|
|
|
@Component({
|
|
template: `
|
|
<query-target>One</query-target>
|
|
<query-target>Two</query-target>
|
|
`
|
|
})
|
|
class SubComponent extends SuperDirective {
|
|
}
|