angular-docs-cn/packages/compiler-cli/test/compliance/r3_view_compiler_i18n_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 {MockDirectory, setup} from '@angular/compiler/test/aot/test_util';
import {compile, expectEmit} from './mock_compile';

const TRANSLATION_NAME_REGEXP = /^MSG_[A-Z0-9]+/;

describe('i18n support in the view compiler', () => {
  const angularFiles = setup({
    compileAngular: false,
    compileFakeCore: true,
    compileAnimations: false,
  });

  describe('single text nodes', () => {
    it('should translate single text nodes with the i18n attribute', () => {
      const files = {
        app: {
          'spec.ts': `
            import {Component, NgModule} from '@angular/core';

            @Component({
              selector: 'my-component',
              template: \`
                <div i18n>Hello world</div>
                <div>&</div>
                <div i18n>farewell</div>
                <div i18n>farewell</div>
              \`
            })
            export class MyComponent {}

            @NgModule({declarations: [MyComponent]})
            export class MyModule {}
        `
        }
      };

      const template = `
      const $msg_1$ = goog.getMsg("Hello world");
      const $msg_2$ = goog.getMsg("farewell");
      …
      template: function MyComponent_Template(rf, ctx) {
        if (rf & 1) {
          …
          $r3$.ɵT(1, $msg_1$);
          …
          $r3$.ɵT(3,"&");
          …
          $r3$.ɵT(5, $msg_2$);
          …
          $r3$.ɵT(7, $msg_2$);
          …
        }
      }
    `;

      const result = compile(files, angularFiles);
      expectEmit(result.source, template, 'Incorrect template', {
        '$msg_1$': TRANSLATION_NAME_REGEXP,
        '$msg_2$': TRANSLATION_NAME_REGEXP,
      });
    });

    it('should add the meaning and description as JsDoc comments', () => {
      const files = {
        app: {
          'spec.ts': `
            import {Component, NgModule} from '@angular/core';

            @Component({
              selector: 'my-component',
              template: \`
                <div i18n="meaning|desc@@id" i18n-title="desc" title="introduction">Hello world</div>
              \`
            })
            export class MyComponent {}

            @NgModule({declarations: [MyComponent]})
            export class MyModule {}
        `
        }
      };

      const template = `
      /**
       * @desc desc
       */
      const $msg_1$ = goog.getMsg("introduction");
      const $c1$ = ["title", $msg_1$];
      …
      /**
       * @desc desc
       * @meaning meaning
       */
      const $msg_2$ = goog.getMsg("Hello world");
      …
      template: function MyComponent_Template(rf, ctx) {
        if (rf & 1) {
          $r3$.ɵE(0, "div", $c1$);
          $r3$.ɵT(1, $msg_2$);
          $r3$.ɵe();
        }
      }
      `;

      const result = compile(files, angularFiles);
      expectEmit(result.source, template, 'Incorrect template', {
        '$msg_1$': TRANSLATION_NAME_REGEXP,
      });
    });
  });

  describe('static attributes', () => {
    it('should translate static attributes', () => {
      const files = {
        app: {
          'spec.ts': `
            import {Component, NgModule} from '@angular/core';

            @Component({
              selector: 'my-component',
              template: \`
                <div i18n id="static" i18n-title="m|d" title="introduction"></div>
              \`
            })
            export class MyComponent {}

            @NgModule({declarations: [MyComponent]})
            export class MyModule {}
        `
        }
      };

      const template = `
      /**
       * @desc d
       * @meaning m
       */
      const $msg_1$ = goog.getMsg("introduction");
      const $c1$ = ["id", "static", "title", $msg_1$];
      …
      template: function MyComponent_Template(rf, ctx) {
        if (rf & 1) {
          $r3$.ɵEe(0, "div", $c1$);
        }
      }
    `;

      const result = compile(files, angularFiles);
      expectEmit(result.source, template, 'Incorrect template', {
        '$msg_1$': TRANSLATION_NAME_REGEXP,
      });
    });
  });

  // TODO(vicb): this feature is not supported yet
  xdescribe('nested nodes', () => {
    it('should generate the placeholders maps', () => {
      const files = {
        app: {
          'spec.ts': `
            import {Component, NgModule} from '@angular/core';

            @Component({
              selector: 'my-component',
              template: \`
                <div i18n>Hello <b>{{name}}<i>!</i><i>!</i></b></div>
                <div>Other</div>
                <div i18n>2nd</div>
                <div i18n><i>3rd</i></div>
              \`
            })
            export class MyComponent {}

            @NgModule({declarations: [MyComponent]})
            export class MyModule {}
        `
        }
      };

      const template = `
      const $r1$ = {"b":[2], "i":[4, 6]};
      const $r2$ = {"i":[13]};
    `;

      const result = compile(files, angularFiles);
      expectEmit(result.source, template, 'Incorrect template');
    });
  });

  describe('errors', () => {
    it('should throw on nested i18n sections', () => {
      const files = {
        app: {
          'spec.ts': `
            import {Component, NgModule} from '@angular/core';

            @Component({
              selector: 'my-component',
              template: \`
                <div i18n><div i18n></div></div>
              \`
            })
            export class MyComponent {}

            @NgModule({declarations: [MyComponent]})
            export class MyModule {}
        `
        }
      };

      expect(() => compile(files, angularFiles))
          .toThrowError(
              'Could not mark an element as translatable inside of a translatable section');
    });

  });
});