// 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_unittest_base.js']);

/**
 * Test fixture.
 * @constructor
 * @extends {ChromeVoxUnitTestBase}
 */
function CvoxPageSelectionUnitTest() {}

CvoxPageSelectionUnitTest.prototype = {
  __proto__: ChromeVoxUnitTestBase.prototype,

  /** @override */
  closureModuleDeps: [
    'cvox.CursorSelection',
    'cvox.PageSelection',
  ],

  /** @override */
  setUp: function() {
    this.loadDoc(function() {/*!
      <p id='p1'>The quick</p>
      <a id='a1' href='#'>brown fox</a>
      <h1 id='h1'>jumped over</h1>
    */});
    this.pSel = cvox.CursorSelection.fromNode($('p1'));
    this.pSel.start.index = 0;
    this.pSel.end.index = 1;
    this.aSel = cvox.CursorSelection.fromNode($('a1'));
    this.aSel.start.index = 0;
    this.aSel.end.index = 1;
    this.hSel = cvox.CursorSelection.fromNode($('h1'));
    this.hSel.start.index = 0;
    this.hSel.end.index = 1;
  },

  /**
   * Asserts a selection.
   * @param {string} str The expected contents of selection.
   * @private
   */
  assertSelection_: function(str) {
    assertEquals(str, window.getSelection().toString());
  }
};

TEST_F('CvoxPageSelectionUnitTest', 'BasicExtend', function() {
  var pageSel = new cvox.PageSelection(this.pSel);
  pageSel.extend(this.hSel);
  this.assertSelection_('The quick\n\nbrown fox\njumped over');
  this.hSel.end.node = this.hSel.end.node.firstChild;
  this.hSel.end.index = 6;
  pageSel.extend(this.hSel);
  this.assertSelection_('The quick\n\nbrown fox\njumped');
});


/** Tests a reverse extension. */
TEST_F('CvoxPageSelectionUnitTest', 'ReverseExtend', function() {
  var pageSel = new cvox.PageSelection(this.pSel);
  this.assertSelection_('The quick');
  pageSel.extend(this.hSel);
  this.assertSelection_('The quick\n\nbrown fox\njumped over');
  pageSel.extend(this.aSel.setReversed(true));
  this.assertSelection_('The quick\n\nbrown fox');
  this.pSel.setReversed(true);
  pageSel.extend(this.pSel);
  this.assertSelection_('The quick');
  this.pSel.start.node = this.pSel.start.node.firstChild;
  this.pSel.start.index = 3;
  pageSel.extend(this.pSel);
  this.assertSelection_('The');
});


/** Tests all possible configurations of PageSelection's and extending
 * CursorSelection's.
 */
TEST_F('CvoxPageSelectionUnitTest', 'ExtendDirections', function() {
  // A normal page selection, with a normal extension.
  var pageSel = new cvox.PageSelection(this.aSel);
  assertTrue(pageSel.extend(this.hSel));

  // A normal page selection, with a reversed extension.
  assertTrue(pageSel.extend(this.hSel.setReversed(true)));

  // A reversed page selection, with a normal cursor selection.
  var rPageSel = new cvox.PageSelection(this.aSel.setReversed(true));
  assertTrue(rPageSel.extend(this.pSel));

  // A reversed page selection, with a reversed extension.
  assertTrue(rPageSel.extend(this.pSel.setReversed(true)));
});


/** Tests degenerate extensions. */
TEST_F('CvoxPageSelectionUnitTest', 'DegenerateExtensions', function() {
  var pageSel = new cvox.PageSelection(this.aSel);

  // A normal page selection, with a normal extension not in document order.
  assertFalse(pageSel.extend(this.pSel));

  // And, this causes a reset of page selection.
  assertTrue(pageSel.sel_.equals(this.pSel));

  // Reinitialize.
  pageSel = new cvox.PageSelection(this.aSel.setReversed(false));

  // A normal page selection, with a reversed extension not in document order.
  assertFalse(pageSel.extend(this.pSel.setReversed(true)));

  // And, again, it causes reset of page selection.
assertTrue(pageSel.sel_.equals(this.pSel));

  // Reverse page selections.
  var rPageSel = new cvox.PageSelection(this.aSel.setReversed(true));

  // A reversed page selection, with a normal extension not in document order.
  assertFalse(rPageSel.extend(this.hSel));
  assertTrue(rPageSel.sel_.equals(this.hSel));

  // A reversed page selection, with a reversed extension not in document order.
  rPageSel = new cvox.PageSelection(this.aSel.setReversed(true));
  assertFalse(rPageSel.extend(this.hSel.setReversed(true)));
  assertTrue(rPageSel.sel_.equals(this.hSel));

  // And, finally, try extending to oneself in either direction.
  pageSel = new cvox.PageSelection(this.aSel.setReversed(false));

  // A normal page selection, with an extension to itself.
  assertFalse(pageSel.extend(this.aSel.setReversed(false)));
  assertFalse(pageSel.extend(this.aSel.setReversed(true)));

  // A reversed page selection, with an extension to itself.
  var rPageSel = new cvox.PageSelection(this.aSel.setReversed(true));
  assertFalse(rPageSel.extend(this.aSel.setReversed(true)));
  assertFalse(rPageSel.extend(this.aSel.setReversed(false)));
});