angular-docs-cn/modules/@angular/compiler/test/i18n/message_bundle_spec.ts

/**
 * @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 {serializeNodes} from '../../src/i18n/digest';
import * as i18n from '../../src/i18n/i18n_ast';
import {MessageBundle} from '../../src/i18n/message_bundle';
import {Serializer} from '../../src/i18n/serializers/serializer';
import {HtmlParser} from '../../src/ml_parser/html_parser';
import {DEFAULT_INTERPOLATION_CONFIG} from '../../src/ml_parser/interpolation_config';

export function main(): void {
  describe('MessageBundle', () => {
    describe('Messages', () => {
      let messages: MessageBundle;

      beforeEach(() => { messages = new MessageBundle(new HtmlParser, [], {}); });

      it('should extract the message to the catalog', () => {
        messages.updateFromTemplate(
            '<p i18n="m|d">Translate Me</p>', 'url', DEFAULT_INTERPOLATION_CONFIG);
        expect(humanizeMessages(messages)).toEqual([
          'Translate Me (m|d)',
        ]);
      });

      it('should extract the all messages and duplicates', () => {
        messages.updateFromTemplate(
            '<p i18n="m|d">Translate Me</p><p i18n>Translate Me</p><p i18n>Translate Me</p>', 'url',
            DEFAULT_INTERPOLATION_CONFIG);
        expect(humanizeMessages(messages)).toEqual([
          'Translate Me (m|d)',
          'Translate Me (|)',
          'Translate Me (|)',
        ]);
      });
    });
  });
}

class _TestSerializer implements Serializer {
  write(messages: i18n.Message[]): string {
    return messages.map(msg => `${serializeNodes(msg.nodes)} (${msg.meaning}|${msg.description})`)
        .join('//');
  }

  load(content: string, url: string): {} { return null; }

  digest(msg: i18n.Message): string { return 'unused'; }
}

function humanizeMessages(catalog: MessageBundle): string[] {
  return catalog.write(new _TestSerializer()).split('//');
}