chrome/browser/resources/chromeos/chromevox/braille/braille_translator_manager_test.extjs

// Copyright 2014 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.

// Include test fixture.
GEN_INCLUDE(['../testing/chromevox_e2e_test_base.js',
             '../testing/assert_additions.js']);

/**
 * Test fixture for cvox.BrailleTranslatorManager tests.
 * This is an E2E test because there's no easy way to load a data file in
 * a webui-style test.
 * @constructor
 * @extends {ChromeVoxE2ETest}
 */
function ChromeVoxBrailleTranslatorManagerTest() {
  ChromeVoxE2ETest.call(this);
}

ChromeVoxBrailleTranslatorManagerTest.prototype = {
  __proto__: ChromeVoxE2ETest.prototype,

  /** @override */
  setUp: function() {
    this.liblouis = new FakeLibLouis();
    this.manager = new cvox.BrailleTranslatorManager(this.liblouis);
    this.liblouis.translatorManager = this.manager;
    // This is called by an event handler in production, but we don't rely
    // on that for this test.
    this.manager.loadLiblouis_();
  },

  addChangeListener: function(callback) {
    return this.manager.addChangeListener(callOnce(this.newCallback(callback)));
  },
};

/** @extends {cvox.LibLouis} */
function FakeLibLouis() {
}

FakeLibLouis.prototype = {
  /** @override */
  attachToElement: function() {},

  /** @override */
  getTranslator: function(fileNames, callback) {
    var tables = this.translatorManager.getTablesForTest();
    var result = null;
    if (tables != null) {
      var found = tables.filter(function(table) {
        return table.fileNames === fileNames;
      })[0];
      if (found) {
        result = new FakeTranslator(found);
      }
    }
    callback(result);
  }
};

/**
 * @extends {cvox.LibLouis.Translator}
 * @param {cvox.BrailleTable.Table} table
 * @constructor
 */
function FakeTranslator(table) {
  this.table = table;
}

function callOnce(callback) {
  var called = false;
  return function() {
    if (!called) {
      called = true;
      callback.apply(null, arguments);
    }
  };
}

TEST_F('ChromeVoxBrailleTranslatorManagerTest', 'testInitial', function() {
  assertEquals(null, this.manager.getExpandingTranslator());
  assertEquals(null, this.manager.getDefaultTranslator());
  assertEquals(null, this.manager.getUncontractedTranslator());
  this.addChangeListener(function() {
    assertNotEquals(null, this.manager.getExpandingTranslator());
    assertEquals('en-US-comp8', this.manager.getDefaultTranslator().table.id);
    assertEquals(null, this.manager.getUncontractedTranslator());
  });
});

TEST_F('ChromeVoxBrailleTranslatorManagerTest', 'testRefreshWithoutChange',
       function() {
  this.addChangeListener(function() {
    assertNotEquals(null, this.manager.getExpandingTranslator());
    // This works because the fake liblouis is actually not asynchonous.
    this.manager.addChangeListener(function() {
      assertNotReached('Refresh should not be called without a change.');
    });
    this.manager.refresh(localStorage['brailleTable']);
  });
});

TEST_F('ChromeVoxBrailleTranslatorManagerTest', 'testRefreshWithChange',
       function() {
  this.addChangeListener(function() {
    assertNotEquals(null, this.manager.getExpandingTranslator());
    this.addChangeListener(function() {
      assertEquals('en-UEB-g2', this.manager.getDefaultTranslator().table.id);
      assertEquals('en-UEB-g1',
                   this.manager.getUncontractedTranslator().table.id);
    });
    this.manager.refresh('en-UEB-g2');
  });
});