angular-cn/modules/@angular/platform-browser/test/browser/meta_spec.ts

193 lines
6.4 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 {Injectable} from '@angular/core';
import {TestBed} from '@angular/core/testing';
import {BrowserModule, Meta} from '@angular/platform-browser';
import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
import {expect} from '@angular/platform-browser/testing/matchers';
export function main() {
describe('Meta service', () => {
const metaService: Meta = new Meta(getDOM());
const doc: HTMLDocument = getDOM().defaultDoc();
let defaultMeta: HTMLMetaElement;
beforeEach(() => {
defaultMeta = getDOM().createElement('meta', doc) as HTMLMetaElement;
defaultMeta.setAttribute('property', 'fb:app_id');
defaultMeta.setAttribute('content', '123456789');
getDOM().getElementsByTagName(doc, 'head')[0].appendChild(defaultMeta);
});
afterEach(() => getDOM().remove(defaultMeta));
it('should return meta tag matching selector', () => {
const actual: HTMLMetaElement = metaService.getTag('property="fb:app_id"');
expect(actual).not.toBeNull();
expect(actual.content).toEqual('123456789');
});
it('should return all meta tags matching selector', () => {
const tag1 = metaService.addTag({name: 'author', content: 'page author'});
const tag2 = metaService.addTag({name: 'author', content: 'another page author'});
const actual: HTMLMetaElement[] = metaService.getTags('name=author');
expect(actual.length).toEqual(2);
expect(actual[0].content).toEqual('page author');
expect(actual[1].content).toEqual('another page author');
// clean up
metaService.removeTagElement(tag1);
metaService.removeTagElement(tag2);
});
it('should return null if meta tag does not exist', () => {
const actual: HTMLMetaElement = metaService.getTag('fake=fake');
expect(actual).toBeNull();
});
it('should remove meta tag by the given selector', () => {
expect(metaService.getTag('name=author')).toBeNull();
metaService.addTag({name: 'author', content: 'page author'});
expect(metaService.getTag('name=author')).not.toBeNull();
metaService.removeTag('name=author');
expect(metaService.getTag('name=author')).toBeNull();
});
it('should remove meta tag by the given element', () => {
expect(metaService.getTag('name=keywords')).toBeNull();
metaService.addTags([{name: 'keywords', content: 'meta test'}]);
const meta = metaService.getTag('name=keywords');
expect(meta).not.toBeNull();
metaService.removeTagElement(meta);
expect(metaService.getTag('name=keywords')).toBeNull();
});
it('should update meta tag matching the given selector', () => {
metaService.updateTag({content: '4321'}, 'property="fb:app_id"');
const actual = metaService.getTag('property="fb:app_id"');
expect(actual).not.toBeNull();
expect(actual.content).toEqual('4321');
});
it('should extract selector from the tag definition', () => {
metaService.updateTag({property: 'fb:app_id', content: '666'});
const actual = metaService.getTag('property="fb:app_id"');
expect(actual).not.toBeNull();
expect(actual.content).toEqual('666');
});
it('should create meta tag if it does not exist', () => {
expect(metaService.getTag('name="twitter:title"')).toBeNull();
metaService.updateTag(
{name: 'twitter:title', content: 'Content Title'}, 'name="twitter:title"');
const actual = metaService.getTag('name="twitter:title"');
expect(actual).not.toBeNull();
expect(actual.content).toEqual('Content Title');
// clean up
metaService.removeTagElement(actual);
});
it('should add new meta tag', () => {
expect(metaService.getTag('name="og:title"')).toBeNull();
metaService.addTag({name: 'og:title', content: 'Content Title'});
const actual = metaService.getTag('name="og:title"');
expect(actual).not.toBeNull();
expect(actual.content).toEqual('Content Title');
// clean up
metaService.removeTagElement(actual);
});
it('should add multiple new meta tags', () => {
expect(metaService.getTag('name="twitter:title"')).toBeNull();
expect(metaService.getTag('property="og:title"')).toBeNull();
metaService.addTags([
{name: 'twitter:title', content: 'Content Title'},
{property: 'og:title', content: 'Content Title'}
]);
const twitterMeta = metaService.getTag('name="twitter:title"');
const fbMeta = metaService.getTag('property="og:title"');
expect(twitterMeta).not.toBeNull();
expect(fbMeta).not.toBeNull();
// clean up
metaService.removeTagElement(twitterMeta);
metaService.removeTagElement(fbMeta);
});
it('should not add meta tag if it is already present on the page and has the same attr', () => {
expect(metaService.getTags('property="fb:app_id"').length).toEqual(1);
metaService.addTag({property: 'fb:app_id', content: '123456789'});
expect(metaService.getTags('property="fb:app_id"').length).toEqual(1);
});
it('should add meta tag if it is already present on the page and but has different attr',
() => {
expect(metaService.getTags('property="fb:app_id"').length).toEqual(1);
const meta = metaService.addTag({property: 'fb:app_id', content: '666'});
expect(metaService.getTags('property="fb:app_id"').length).toEqual(2);
// clean up
metaService.removeTagElement(meta);
});
it('should add meta tag if it is already present on the page and force true', () => {
expect(metaService.getTags('property="fb:app_id"').length).toEqual(1);
const meta = metaService.addTag({property: 'fb:app_id', content: '123456789'}, true);
expect(metaService.getTags('property="fb:app_id"').length).toEqual(2);
// clean up
metaService.removeTagElement(meta);
});
});
describe('integration test', () => {
@Injectable()
class DependsOnMeta {
constructor(public meta: Meta) {}
}
beforeEach(() => {
TestBed.configureTestingModule({
imports: [BrowserModule],
providers: [DependsOnMeta],
});
});
it('should inject Meta service when using BrowserModule',
() => expect(TestBed.get(DependsOnMeta).meta).toBeAnInstanceOf(Meta));
});
}