angular-cn/packages/platform-server/test/server_styles_host_spec.ts

51 lines
1.4 KiB
TypeScript

/**
* @license
* Copyright Google LLC 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 {ɵgetDOM as getDOM} from '@angular/common';
import {ServerStylesHost} from '@angular/platform-server/src/styles_host';
(function() {
if (getDOM().supportsDOMEvents) return; // NODE only
describe('ServerStylesHost', () => {
let ssh: ServerStylesHost;
let documentHead: Element;
beforeEach(() => {
const doc = getDOM().createHtmlDocument();
ssh = new ServerStylesHost(doc, '');
documentHead = doc.head;
doc.querySelector('title')?.remove();
});
it('should add existing styles', () => {
ssh.addStyles(['a {};']);
expect(documentHead.innerHTML).toEqual('<style>a {};</style>');
});
it('should add new styles to hosts', () => {
ssh.addStyles(['a {};']);
expect(documentHead.innerHTML).toEqual('<style>a {};</style>');
});
it('should add styles only once to hosts', () => {
ssh.addStyles(['a {};']);
ssh.addStyles(['a {};']);
expect(documentHead.innerHTML).toEqual('<style>a {};</style>');
});
it('should remove style nodes on destroy', () => {
ssh.addStyles(['a {};']);
expect(documentHead.innerHTML).toEqual('<style>a {};</style>');
ssh.ngOnDestroy();
expect(documentHead.innerHTML).toEqual('');
});
});
})();