angular-cn/packages/platform-browser/test/browser/meta_spec.ts

203 lines
6.8 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 {ɵgetDOM as getDOM} from '@angular/common';
import {Injectable} from '@angular/core';
import {TestBed} from '@angular/core/testing';
import {BrowserModule, Meta} from '@angular/platform-browser';
import {expect} from '@angular/platform-browser/testing/src/matchers';
{
describe('Meta service', () => {
let doc: Document;
let metaService: Meta;
let defaultMeta: HTMLMetaElement;
beforeEach(() => {
doc = getDOM().createHtmlDocument();
metaService = new Meta(doc);
defaultMeta = getDOM().createElement('meta', doc) as HTMLMetaElement;
getDOM().setAttribute(defaultMeta, 'property', 'fb:app_id');
getDOM().setAttribute(defaultMeta, 'content', '123456789');
getDOM().appendChild(getDOM().getElementsByTagName(doc, 'head')[0], 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(getDOM().getAttribute(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(getDOM().getAttribute(actual[0], 'content')).toEqual('page author');
expect(getDOM().getAttribute(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', () => {
const selector = 'name=author';
expect(metaService.getTag(selector)).toBeNull();
metaService.addTag({name: 'author', content: 'page author'});
expect(metaService.getTag(selector)).not.toBeNull();
metaService.removeTag(selector);
expect(metaService.getTag(selector)).toBeNull();
});
it('should remove meta tag by the given element', () => {
const selector = 'name=keywords';
expect(metaService.getTag(selector)).toBeNull();
metaService.addTags([{name: 'keywords', content: 'meta test'}]);
const meta = metaService.getTag(selector) !;
expect(meta).not.toBeNull();
metaService.removeTagElement(meta);
expect(metaService.getTag(selector)).toBeNull();
});
it('should update meta tag matching the given selector', () => {
const selector = 'property="fb:app_id"';
metaService.updateTag({content: '4321'}, selector);
const actual = metaService.getTag(selector);
expect(actual).not.toBeNull();
expect(getDOM().getAttribute(actual, 'content')).toEqual('4321');
});
it('should extract selector from the tag definition', () => {
const selector = 'property="fb:app_id"';
metaService.updateTag({property: 'fb:app_id', content: '666'});
const actual = metaService.getTag(selector);
expect(actual).not.toBeNull();
expect(getDOM().getAttribute(actual, 'content')).toEqual('666');
});
it('should create meta tag if it does not exist', () => {
const selector = 'name="twitter:title"';
metaService.updateTag({name: 'twitter:title', content: 'Content Title'}, selector);
const actual = metaService.getTag(selector) !;
expect(actual).not.toBeNull();
expect(getDOM().getAttribute(actual, 'content')).toEqual('Content Title');
// clean up
metaService.removeTagElement(actual);
});
it('should add new meta tag', () => {
const selector = 'name="og:title"';
expect(metaService.getTag(selector)).toBeNull();
metaService.addTag({name: 'og:title', content: 'Content Title'});
const actual = metaService.getTag(selector) !;
expect(actual).not.toBeNull();
expect(getDOM().getAttribute(actual, 'content')).toEqual('Content Title');
// clean up
metaService.removeTagElement(actual);
});
it('should add multiple new meta tags', () => {
const nameSelector = 'name="twitter:title"';
const propertySelector = 'property="og:title"';
expect(metaService.getTag(nameSelector)).toBeNull();
expect(metaService.getTag(propertySelector)).toBeNull();
metaService.addTags([
{name: 'twitter:title', content: 'Content Title'},
{property: 'og:title', content: 'Content Title'}
]);
const twitterMeta = metaService.getTag(nameSelector) !;
const fbMeta = metaService.getTag(propertySelector) !;
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', () => {
const selector = 'property="fb:app_id"';
expect(metaService.getTags(selector).length).toEqual(1);
metaService.addTag({property: 'fb:app_id', content: '123456789'});
expect(metaService.getTags(selector).length).toEqual(1);
});
it('should add meta tag if it is already present on the page and but has different attr',
() => {
const selector = 'property="fb:app_id"';
expect(metaService.getTags(selector).length).toEqual(1);
const meta = metaService.addTag({property: 'fb:app_id', content: '666'}) !;
expect(metaService.getTags(selector).length).toEqual(2);
// clean up
metaService.removeTagElement(meta);
});
it('should add meta tag if it is already present on the page and force true', () => {
const selector = 'property="fb:app_id"';
expect(metaService.getTags(selector).length).toEqual(1);
const meta = metaService.addTag({property: 'fb:app_id', content: '123456789'}, true) !;
expect(metaService.getTags(selector).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));
});
}