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

import {
  beforeEach,
  describe,
  ddescribe,
  expect,
  iit,
  inject,
  it,
  xdescribe,
  xit
} from '@angular/core/testing/testing_internal';

import {HtmlParser} from '@angular/compiler/src/html_parser';
import {MessageExtractor, removeDuplicates} from '@angular/compiler/src/i18n/message_extractor';
import {Message} from '@angular/compiler/src/i18n/message';
import {Parser} from '@angular/compiler/src/expression_parser/parser';
import {Lexer} from '@angular/compiler/src/expression_parser/lexer';

export function main() {
  describe('MessageExtractor', () => {
    let extractor: MessageExtractor;

    beforeEach(() => {
      let htmlParser = new HtmlParser();
      var parser = new Parser(new Lexer());
      extractor = new MessageExtractor(htmlParser, parser);
    });

    it('should extract from elements with the i18n attr', () => {
      let res = extractor.extract("<div i18n='meaning|desc'>message</div>", "someurl");
      expect(res.messages).toEqual([new Message("message", 'meaning', 'desc')]);
    });

    it('should extract from elements with the i18n attr without a desc', () => {
      let res = extractor.extract("<div i18n='meaning'>message</div>", "someurl");
      expect(res.messages).toEqual([new Message("message", 'meaning', null)]);
    });

    it('should extract from elements with the i18n attr without a meaning', () => {
      let res = extractor.extract("<div i18n>message</div>", "someurl");
      expect(res.messages).toEqual([new Message("message", null, null)]);
    });

    it('should extract from attributes', () => {
      let res = extractor.extract(`
        <div
          title1='message1' i18n-title1='meaning1|desc1'
          title2='message2' i18n-title2='meaning2|desc2'>
        </div>
      `,
                                  "someurl");

      expect(res.messages)
          .toEqual([
            new Message("message1", "meaning1", "desc1"),
            new Message("message2", "meaning2", "desc2")
          ]);
    });

    it('should extract from partitions', () => {
      let res = extractor.extract(`
         <!-- i18n: meaning1|desc1 -->message1<!-- /i18n -->
         <!-- i18n: meaning2|desc2 -->message2<!-- /i18n -->`,
                                  "someUrl");

      expect(res.messages)
          .toEqual([
            new Message("message1", "meaning1", "desc1"),
            new Message("message2", "meaning2", "desc2")
          ]);
    });

    it('should ignore other comments', () => {
      let res = extractor.extract(`
         <!-- i18n: meaning1|desc1 --><!-- other -->message1<!-- /i18n -->`,
                                  "someUrl");

      expect(res.messages).toEqual([new Message("message1", "meaning1", "desc1")]);
    });

    it('should replace interpolation with placeholders (text nodes)', () => {
      let res = extractor.extract("<div i18n>Hi {{one}} and {{two}}</div>", "someurl");
      expect(res.messages)
          .toEqual(
              [new Message('<ph name="t0">Hi <ph name="0"/> and <ph name="1"/></ph>', null, null)]);
    });

    it('should replace interpolation with placeholders (attributes)', () => {
      let res =
          extractor.extract("<div title='Hi {{one}} and {{two}}' i18n-title></div>", "someurl");
      expect(res.messages)
          .toEqual([new Message('Hi <ph name="0"/> and <ph name="1"/>', null, null)]);
    });

    it('should replace interpolation with named placeholders if provided (text nodes)', () => {
      let res = extractor.extract(`
        <div i18n>Hi {{one //i18n(ph="FIRST")}} and {{two //i18n(ph="SECOND")}}</div>`,
                                  'someurl');
      expect(res.messages)
          .toEqual([
            new Message('<ph name="t0">Hi <ph name="FIRST"/> and <ph name="SECOND"/></ph>', null,
                        null)
          ]);
    });

    it('should replace interpolation with named placeholders if provided (attributes)', () => {
      let res = extractor.extract(`
      <div title='Hi {{one //i18n(ph="FIRST")}} and {{two //i18n(ph="SECOND")}}'
        i18n-title></div>`,
                                  'someurl');
      expect(res.messages)
          .toEqual([new Message('Hi <ph name="FIRST"/> and <ph name="SECOND"/>', null, null)]);
    });

    it('should match named placeholders with extra spacing', () => {
      let res = extractor.extract(`
      <div title='Hi {{one // i18n ( ph = "FIRST" )}} and {{two // i18n ( ph = "SECOND" )}}'
        i18n-title></div>`,
                                  'someurl');
      expect(res.messages)
          .toEqual([new Message('Hi <ph name="FIRST"/> and <ph name="SECOND"/>', null, null)]);
    });

    it('should suffix duplicate placeholder names with numbers', () => {
      let res = extractor.extract(`
      <div title='Hi {{one //i18n(ph="FIRST")}} and {{two //i18n(ph="FIRST")}} and {{three //i18n(ph="FIRST")}}'
        i18n-title></div>`,
                                  'someurl');
      expect(res.messages)
          .toEqual([
            new Message('Hi <ph name="FIRST"/> and <ph name="FIRST_1"/> and <ph name="FIRST_2"/>',
                        null, null)
          ]);
    });

    it("should handle html content", () => {
      let res = extractor.extract(
          '<div i18n><div attr="value">zero<div>one</div></div><div>two</div></div>', "someurl");
      expect(res.messages)
          .toEqual([
            new Message('<ph name="e0">zero<ph name="e2">one</ph></ph><ph name="e4">two</ph>', null,
                        null)
          ]);
    });

    it("should handle html content with interpolation", () => {
      let res =
          extractor.extract('<div i18n><div>zero{{a}}<div>{{b}}</div></div></div>', "someurl");
      expect(res.messages)
          .toEqual([
            new Message(
                '<ph name="e0"><ph name="t1">zero<ph name="0"/></ph><ph name="e2"><ph name="t3"><ph name="0"/></ph></ph></ph>',
                null, null)
          ]);
    });

    it("should extract from nested elements", () => {
      let res = extractor.extract(
          '<div title="message1" i18n-title="meaning1|desc1"><div i18n="meaning2|desc2">message2</div></div>',
          "someurl");
      expect(res.messages)
          .toEqual([
            new Message("message2", "meaning2", "desc2"),
            new Message("message1", "meaning1", "desc1")
          ]);
    });

    it("should extract messages from attributes in i18n blocks", () => {
      let res = extractor.extract(
          '<div i18n><div attr="value" i18n-attr="meaning|desc">message</div></div>', "someurl");
      expect(res.messages)
          .toEqual([
            new Message('<ph name="e0">message</ph>', null, null),
            new Message('value', "meaning", "desc")
          ]);
    });

    it("should extract messages from special forms", () => {
      let res = extractor.extract(`
        <div>
          {messages.length, plural,
             =0 {You have <b>no</b> messages}
             =1 {You have one message}
          }
        </div>
      `,
                                  "someurl");

      expect(res.messages)
          .toEqual([
            new Message('You have <ph name="e1">no</ph> messages', "plural_0", null),
            new Message('You have one message', "plural_1", null)
          ]);
    });

    it("should remove duplicate messages", () => {
      let res = extractor.extract(`
         <!-- i18n: meaning|desc1 -->message<!-- /i18n -->
         <!-- i18n: meaning|desc2 -->message<!-- /i18n -->`,
                                  "someUrl");

      expect(removeDuplicates(res.messages))
          .toEqual([
            new Message("message", "meaning", "desc1"),
          ]);
    });

    describe("errors", () => {
      it('should error on i18n attributes without matching "real" attributes', () => {
        let res = extractor.extract(`
        <div
          title1='message1' i18n-title1='meaning1|desc1' i18n-title2='meaning2|desc2'>
        </div>
      `,
                                    "someurl");

        expect(res.errors.length).toEqual(1);
        expect(res.errors[0].msg).toEqual("Missing attribute 'title2'.");
      });

      it('should error when cannot find a matching desc', () => {
        let res = extractor.extract(`
         <!-- i18n: meaning1|desc1 -->message1`,
                                    "someUrl");

        expect(res.errors.length).toEqual(1);
        expect(res.errors[0].msg).toEqual("Missing closing 'i18n' comment.");
      });

      it("should return parse errors when the template is invalid", () => {
        let res = extractor.extract("<input&#Besfs", "someurl");
        expect(res.errors.length).toEqual(1);
        expect(res.errors[0].msg).toEqual('Unexpected character "s"');
      });
    });
  });
}