angular-docs-cn/packages/core/test/render3/render_util.ts

84 lines
2.9 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 {ComponentTemplate, ComponentType, PublicFeature, defineComponent, renderComponent as _renderComponent} from '../../src/render3/index';
import {NG_HOST_SYMBOL, createNode, createViewState, renderTemplate} from '../../src/render3/instructions';
import {LElement, LNodeFlags} from '../../src/render3/interfaces';
import {RElement, RText, Renderer3} from '../../src/render3/renderer';
import {getRenderer2} from './imported_renderer2';
export const document = ((global || window) as any).document;
export let containerEl: HTMLElement = null !;
let host: LElement;
let activeRenderer: Renderer3 =
(typeof process !== 'undefined' && process.argv[3] && process.argv[3] === '--r=renderer2') ?
getRenderer2(document) :
document;
// tslint:disable-next-line:no-console
console.log(
`Running tests with ${activeRenderer === document ? 'document' : 'Renderer2'} renderer...`);
export const requestAnimationFrame:
{(fn: () => void): void; flush(): void; queue: (() => void)[];} = function(fn: () => void) {
requestAnimationFrame.queue.push(fn);
} as any;
requestAnimationFrame.flush = function() {
while (requestAnimationFrame.queue.length) {
requestAnimationFrame.queue.shift() !();
}
};
export function resetDOM() {
requestAnimationFrame.queue = [];
containerEl = document.createElement('div');
containerEl.setAttribute('host', '');
host = createNode(null, LNodeFlags.Element, containerEl, createViewState(-1, activeRenderer));
// TODO: assert that the global state is clean (e.g. ngData, previousOrParentNode, etc)
}
export function renderToHtml(template: ComponentTemplate<any>, ctx: any) {
renderTemplate(host, template, ctx);
return toHtml(host.native);
}
beforeEach(resetDOM);
export function renderComponent<T>(type: ComponentType<T>): T {
return _renderComponent(type, {renderer: activeRenderer, host: containerEl});
}
export function toHtml<T>(componentOrElement: T | RElement): string {
const node = (componentOrElement as any)[NG_HOST_SYMBOL] as LElement;
if (node) {
return toHtml(node.native);
} else {
return containerEl.innerHTML.replace(' style=""', '').replace(/<!--[\w]*-->/g, '');
}
}
export function createComponent(
name: string, template: ComponentTemplate<any>): ComponentType<any> {
return class Component {
value: any;
static ngComponentDef = defineComponent({
type: Component,
tag: name,
factory: () => new Component,
template: template,
features: [PublicFeature]
});
};
}
// Verify that DOM is a type of render. This is here for error checking only and has no use.
export const renderer: Renderer3 = null as any as Document;
export const element: RElement = null as any as HTMLElement;
export const text: RText = null as any as Text;