MD Settings: reduce complexity and overhead of Languages singleton

chrome/test/data/webui/settings/languages_page_tests.js

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-cr.define('settings_languages_page', function() {
-  suite('settings-languages-singleton', function() {
-    var languageSettingsPrivate;
-    var languageHelper;
-    var settingsPrefs;
-    var fakePrefs = [{
-      key: 'intl.app_locale',
-      type: chrome.settingsPrivate.PrefType.STRING,
-      value: 'en-US',
-    }, {
-      key: 'intl.accept_languages',
-      type: chrome.settingsPrivate.PrefType.STRING,
-      value: 'en-US,sw',
-    }, {
-      key: 'spellcheck.dictionaries',
-      type: chrome.settingsPrivate.PrefType.LIST,
-      value: ['en-US'],
-    }, {
-      key: 'translate_blocked_languages',
-      type: chrome.settingsPrivate.PrefType.LIST,
-      value: ['en-US'],
-    }];
-    if (cr.isChromeOS) {
-      fakePrefs.push({
-        key: 'settings.language.preferred_languages',
-        type: chrome.settingsPrivate.PrefType.STRING,
-        value: 'en-US,sw',
-      });
-      fakePrefs.push({
-        key: 'settings.language.preload_engines',
-        type: chrome.settingsPrivate.PrefType.STRING,
-        value: '_comp_ime_fgoepimhcoialccpbmpnnblemnepkkaoxkb:us::eng,' +
-               '_comp_ime_fgoepimhcoialccpbmpnnblemnepkkaoxkb:us:dvorak:eng',
-      });
-      fakePrefs.push({
-        key: 'settings.language.enabled_extension_imes',
-        type: chrome.settingsPrivate.PrefType.STRING,
-        value: '',
-      });
-    }
-
-    suiteSetup(function() {
-      CrSettingsPrefs.deferInitialization = true;
-      settingsPrefs = document.createElement('settings-prefs');
-      assertTrue(!!settingsPrefs);
-      var fakeApi = new settings.FakeSettingsPrivate(fakePrefs);
-      settingsPrefs.initializeForTesting(fakeApi);
-
-      languageSettingsPrivate = new settings.FakeLanguageSettingsPrivate();
-      languageSettings.languageSettingsPrivateApiForTest =
-          languageSettingsPrivate;
-
-
-      languageSettingsPrivate.setSettingsPrefs(settingsPrefs);
-      LanguageHelperImpl.instance_ = undefined;
-      languageHelper = LanguageHelperImpl.getInstance();
-      return languageHelper.whenReady();
-    });
-
-    test('languages model', function() {
-      for (var i = 0; i < languageSettingsPrivate.languages.length;
-           i++) {
-        assertEquals(languageSettingsPrivate.languages[i].code,
-                     languageHelper.languages.supported[i].code);
-      }
-      assertEquals(2, languageHelper.languages.enabled.length);
-      assertEquals('en-US',
-                   languageHelper.languages.enabled[0].language.code);
-      assertEquals('sw',
-                   languageHelper.languages.enabled[1].language.code);
-      assertEquals('en', languageHelper.languages.translateTarget);
-
-      // TODO(michaelpg): Test other aspects of the model.
-    });
-
-    test('modifying languages', function() {
-      assertTrue(languageHelper.isLanguageEnabled('en-US'));
-      assertTrue(languageHelper.isLanguageEnabled('sw'));
-      assertFalse(languageHelper.isLanguageEnabled('en-CA'));
-
-      languageHelper.enableLanguage('en-CA');
-      assertTrue(languageHelper.isLanguageEnabled('en-CA'));
-      languageHelper.disableLanguage('sw');
-      assertFalse(languageHelper.isLanguageEnabled('sw'));
-
-      // TODO(michaelpg): Test other modifications.
-    });
-
-    test('reorder languages', function() {
-      languageHelper.enableLanguage('sw');
-      assertEquals('en-US', languageHelper.languages.enabled[0].language.code);
-      assertEquals('en-CA', languageHelper.languages.enabled[1].language.code);
-      assertEquals('sw', languageHelper.languages.enabled[2].language.code);
-
-      // Can move a language up.
-      languageHelper.moveLanguage('sw', -1);
-      assertEquals('en-US', languageHelper.languages.enabled[0].language.code);
-      assertEquals('sw', languageHelper.languages.enabled[1].language.code);
-      assertEquals('en-CA', languageHelper.languages.enabled[2].language.code);
-
-      // Can move a language down.
-      languageHelper.moveLanguage('en-US', 1);
-      assertEquals('sw', languageHelper.languages.enabled[0].language.code);
-      assertEquals('en-US', languageHelper.languages.enabled[1].language.code);
-      assertEquals('en-CA', languageHelper.languages.enabled[2].language.code);
-
-      // Moving the first language up has no effect.
-      languageHelper.moveLanguage('sw', -1);
-      assertEquals('sw', languageHelper.languages.enabled[0].language.code);
-      assertEquals('en-US', languageHelper.languages.enabled[1].language.code);
-      assertEquals('en-CA', languageHelper.languages.enabled[2].language.code);
-
-      // Moving the last language down has no effect.
-      languageHelper.moveLanguage('en-CA', 1);
-      assertEquals('sw', languageHelper.languages.enabled[0].language.code);
-      assertEquals('en-US', languageHelper.languages.enabled[1].language.code);
-      assertEquals('en-CA', languageHelper.languages.enabled[2].language.code);
-    });
-
-    if (cr.isChromeOS) {
-      test('modifying input methods', function() {
-        assertEquals(2, languageHelper.languages.inputMethods.enabled.length);
-        var inputMethods = languageHelper.getInputMethodsForLanguage('en-US');
-        assertEquals(3, inputMethods.length);
-
-        // We can remove one input method.
-        var dvorak =
-            '_comp_ime_fgoepimhcoialccpbmpnnblemnepkkaoxkb:us:dvorak:eng';
-        languageHelper.removeInputMethod(dvorak);
-        assertEquals(1, languageHelper.languages.inputMethods.enabled.length);
-
-        // Enable Swahili.
-        languageHelper.enableLanguage('sw');
-        assertEquals(1, languageHelper.languages.inputMethods.enabled.length);
-
-        // Add input methods for Swahili.
-        var sw = '_comp_ime_abcdefghijklmnopqrstuvwxyzabcdefxkb:sw:sw';
-        var swUS = '_comp_ime_abcdefghijklmnopqrstuvwxyzabcdefxkb:us:sw';
-        languageHelper.addInputMethod(sw);
-        languageHelper.addInputMethod(swUS);
-        assertEquals(3, languageHelper.languages.inputMethods.enabled.length);
-
-        // Disable Swahili. The Swahili-only keyboard should be removed.
-        languageHelper.disableLanguage('sw');
-        assertEquals(2, languageHelper.languages.inputMethods.enabled.length);
-
-        // The US Swahili keyboard should still be enabled, because it supports
-        // English which is still enabled.
-        assertTrue(languageHelper.languages.inputMethods.enabled.some(
-              function(inputMethod) {
-                return inputMethod.id == swUS;
-              }));
-      });
-    }
-  });
-});