locale_plugin_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 {transformSync} from '@babel/core';
import {makeLocalePlugin} from '../../../src/translate/source_files/locale_plugin';

describe('makeEs2015Plugin', () => {
  it('should replace $localize.locale with the locale string', () => {
    const input = '$localize.locale;';
    const output = transformSync(input, {plugins: [makeLocalePlugin('fr')]}) !;
    expect(output.code).toEqual('"fr";');
  });

  it('should replace $localize.locale with the locale string in the context of a variable assignment',
     () => {
       const input = 'const a = $localize.locale;';
       const output = transformSync(input, {plugins: [makeLocalePlugin('fr')]}) !;
       expect(output.code).toEqual('const a = "fr";');
     });

  it('should replace $localize.locale with the locale string in the context of a binary expression',
     () => {
       const input = '$localize.locale || "default";';
       const output = transformSync(input, {plugins: [makeLocalePlugin('fr')]}) !;
       expect(output.code).toEqual('"fr" || "default";');
     });

  it('should remove reference to `$localize` if used to guard the locale', () => {
    const input = 'typeof $localize !== "undefined" && $localize.locale;';
    const output = transformSync(input, {plugins: [makeLocalePlugin('fr')]}) !;
    expect(output.code).toEqual('"fr";');
  });

  it('should remove reference to `$localize` if used in a longer logical expression to guard the locale',
     () => {
       const input = 'x || y && typeof $localize !== "undefined" && $localize.locale;';
       const output = transformSync(input, {plugins: [makeLocalePlugin('fr')]}) !;
       expect(output.code).toEqual('x || y && "fr";');
     });

  it('should ignore properties on $localize other than `locale`', () => {
    const input = '$localize.notLocale;';
    const output = transformSync(input, {plugins: [makeLocalePlugin('fr')]}) !;
    expect(output.code).toEqual('$localize.notLocale;');
  });

  it('should ignore indexed property on $localize', () => {
    const input = '$localize["locale"];';
    const output = transformSync(input, {plugins: [makeLocalePlugin('fr')]}) !;
    expect(output.code).toEqual('$localize["locale"];');
  });

  it('should ignore `locale` on objects other than $localize', () => {
    const input = '$notLocalize.locale;';
    const output = transformSync(input, {plugins: [makeLocalePlugin('fr')]}) !;
    expect(output.code).toEqual('$notLocalize.locale;');
  });

  it('should ignore `$localize.locale` if `$localize` is not global', () => {
    const input = 'const $localize = {};\n$localize.locale;';
    const output = transformSync(input, {plugins: [makeLocalePlugin('fr')]}) !;
    expect(output.code).toEqual('const $localize = {};\n$localize.locale;');
  });

  it('should ignore `locale` if it is not directly accessed from `$localize`', () => {
    const input = 'const {locale} = $localize;\nconst a = locale;';
    const output = transformSync(input, {plugins: [makeLocalePlugin('fr')]}) !;
    expect(output.code).toEqual('const {\n  locale\n} = $localize;\nconst a = locale;');
  });
});