angular-docs-cn/modules/@angular/compiler-cli/integrationtest/test/query_spec.ts

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import {DebugElement, QueryList, ReflectiveInjector, getDebugNode, lockRunMode} from '@angular/core';
import {BROWSER_APP_PROVIDERS, By} from '@angular/platform-browser';
import {serverPlatform} from '@angular/platform-server';
import {CompForChildQuery, CompWithChildQuery} from '../src/queries';
import {CompWithChildQueryNgFactory} from '../src/queries.ngfactory';
describe('child queries', () => {
it('should support compiling child queries', () => {
const appInjector =
ReflectiveInjector.resolveAndCreate(BROWSER_APP_PROVIDERS, serverPlatform().injector);
var childQueryComp = CompWithChildQueryNgFactory.create(appInjector);
var debugElement = <DebugElement>getDebugNode(childQueryComp.location.nativeElement);
var compWithChildren = debugElement.query(By.directive(CompWithChildQuery));
expect(childQueryComp.instance.child).toBeDefined();
expect(childQueryComp.instance.child instanceof CompForChildQuery).toBe(true);
});
it('should support compiling children queries', () => {
const appInjector =
ReflectiveInjector.resolveAndCreate(BROWSER_APP_PROVIDERS, serverPlatform().injector);
var childQueryComp = CompWithChildQueryNgFactory.create(appInjector);
var debugElement = <DebugElement>getDebugNode(childQueryComp.location.nativeElement);
var compWithChildren = debugElement.query(By.directive(CompWithChildQuery));
childQueryComp.changeDetectorRef.detectChanges();
expect(childQueryComp.instance.children).toBeDefined();
expect(childQueryComp.instance.children instanceof QueryList).toBe(true);
});
});