angular-docs-cn/modules/@angular/platform-browser-dynamic/testing/dom_test_component_renderer.ts

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/**
* @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 {Inject, Injectable} from '@angular/core';
import {TestComponentRenderer} from '@angular/core/testing';
import {DOCUMENT} from '@angular/platform-browser';
import {getDOM} from '../platform_browser_private';
/**
* A DOM based implementation of the TestComponentRenderer.
*/
@Injectable()
export class DOMTestComponentRenderer extends TestComponentRenderer {
constructor(@Inject(DOCUMENT) private _doc: any /** TODO #9100 */) { super(); }
insertRootElement(rootElId: string) {
let rootEl = <HTMLElement>getDOM().firstChild(
getDOM().content(getDOM().createTemplate(`<div id="${rootElId}"></div>`)));
// TODO(juliemr): can/should this be optional?
let oldRoots = getDOM().querySelectorAll(this._doc, '[id^=root]');
for (let i = 0; i < oldRoots.length; i++) {
getDOM().remove(oldRoots[i]);
}
getDOM().appendChild(this._doc.body, rootEl);
}
}