angular-docs-cn/packages/compiler/test/i18n/serializers/i18n_ast_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 * as i18n from '@angular/compiler/src/i18n/i18n_ast';

import {serializeNodes} from '../../../src/i18n/digest';
import {_extractMessages} from '../i18n_parser_spec';

export function main(): void {
  describe('i18n AST', () => {
    describe('CloneVisitor', () => {
      it('should clone an AST', () => {
        const messages = _extractMessages(
            '<div i18n="m|d">b{count, plural, =0 {{sex, select, male {m}}}}a</div>');
        const nodes = messages[0].nodes;
        const text = serializeNodes(nodes).join('');
        expect(text).toEqual(
            'b<ph icu name="ICU">{count, plural, =0 {[{sex, select, male {[m]}}]}}</ph>a');
        const visitor = new i18n.CloneVisitor();
        const cloneNodes = nodes.map(n => n.visit(visitor));
        expect(serializeNodes(nodes)).toEqual(serializeNodes(cloneNodes));
        nodes.forEach((n: i18n.Node, i: number) => {
          expect(n).toEqual(cloneNodes[i]);
          expect(n).not.toBe(cloneNodes[i]);
        });
      });
    });

    describe('RecurseVisitor', () => {
      it('should visit all nodes', () => {
        const visitor = new RecurseVisitor();
        const container = new i18n.Container(
            [
              new i18n.Text('', null !),
              new i18n.Placeholder('', '', null !),
              new i18n.IcuPlaceholder(null !, '', null !),
            ],
            null !);
        const tag = new i18n.TagPlaceholder('', {}, '', '', [container], false, null !);
        const icu = new i18n.Icu('', '', {tag}, null !);

        icu.visit(visitor);
        expect(visitor.textCount).toEqual(1);
        expect(visitor.phCount).toEqual(1);
        expect(visitor.icuPhCount).toEqual(1);
      });
    });
  });
}

class RecurseVisitor extends i18n.RecurseVisitor {
  textCount = 0;
  phCount = 0;
  icuPhCount = 0;

  visitText(text: i18n.Text, context?: any): any { this.textCount++; }

  visitPlaceholder(ph: i18n.Placeholder, context?: any): any { this.phCount++; }

  visitIcuPlaceholder(ph: i18n.IcuPlaceholder, context?: any): any { this.icuPhCount++; }
}