Refine ChromeVox's treatment of containers

chrome/browser/resources/chromeos/chromevox/cvox2/background/cursors_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_next_e2e_test_base.js']);
 
 /**
  * Test fixture for cvox2.cursors.
  * @constructor
@@ skipping 114 matching lines @@
   multiInlineDoc: function() {/*!
     <p style='max-width: 5px'>start diff line</p>
     <p>end
   */}
 };
 
 TEST_F('CursorsTest', 'CharacterCursor', function() {
   this.runCursorMovesOnDocument(this.simpleDoc, [
     [CHARACTER, DIRECTIONAL, FORWARD, {index: 1, value: 'start '}],
     [CHARACTER, DIRECTIONAL, BACKWARD, {index: 0, value: 'start '}],
-    [CHARACTER, DIRECTIONAL, BACKWARD, {index: 0, value: undefined}],
+    // Bumps up against edge.
+    [CHARACTER, DIRECTIONAL, BACKWARD, {index: 0, value: 'start '}],
 
-    [CHARACTER, DIRECTIONAL, FORWARD, {index: 0, value: 'start '}],
     [CHARACTER, DIRECTIONAL, FORWARD, {index: 1, value: 'start '}],
     [CHARACTER, DIRECTIONAL, FORWARD, {index: 2, value: 'start '}],
     [CHARACTER, DIRECTIONAL, FORWARD, {index: 3, value: 'start '}],
     [CHARACTER, DIRECTIONAL, FORWARD, {index: 4, value: 'start '}],
     [CHARACTER, DIRECTIONAL, FORWARD, {index: 5, value: 'start '}],
 
     [CHARACTER, DIRECTIONAL, FORWARD, {index: 0, value: 'same line'}],
     [CHARACTER, DIRECTIONAL, FORWARD, {index: 1, value: 'same line'}],
     [CHARACTER, DIRECTIONAL, BACKWARD, {index: 0, value: 'same line'}],
 
@@ skipping 43 matching lines @@
     // Line (BOUND).
     [LINE, BOUND, FORWARD, {value: 'same line'}],
     [LINE, BOUND, FORWARD, {value: 'same line'}],
     [LINE, BOUND, BACKWARD, {value: 'start '}],
     [LINE, BOUND, BACKWARD, {value: 'start '}],
 
     // Line (DIRECTIONAL).
     [LINE, DIRECTIONAL, FORWARD, {value: 'end'}],
     [LINE, DIRECTIONAL, FORWARD, {value: 'end'}],
     [LINE, DIRECTIONAL, BACKWARD, {value: 'same line'}],
-    [LINE, DIRECTIONAL, BACKWARD, {value: undefined}],
-    [LINE, BOUND, BACKWARD, {value: undefined}],
-    [LINE, DIRECTIONAL, FORWARD, {value: 'start '}]]);
+    // Bump against an edge.
+    [LINE, DIRECTIONAL, BACKWARD, {value: 'same line'}],
+    [LINE, BOUND, BACKWARD, {value: 'start '}]]);
 });
 
 TEST_F('CursorsTest', 'CharacterRange', function() {
   this.runCursorMovesOnDocument(this.simpleDoc, [
       [CHARACTER, FORWARD,
           {value: 'start ', index: 1}, {value: 'start ', index: 2}],
       [CHARACTER, FORWARD,
           {value: 'start ', index: 2}, {value: 'start ', index: 3}],
       [CHARACTER, FORWARD,
           {value: 'start ', index: 3}, {value: 'start ', index: 4}],
@@ skipping 51 matching lines @@
   this.runCursorMovesOnDocument(this.simpleDoc, [
         [LINE, FORWARD, {value: 'end', index: 0}, {value: 'end', index: 3}],
       [LINE, FORWARD, {value: 'end', index: 0}, {value: 'end', index: 3}],
       [LINE, FORWARD, {value: 'end', index: 0}, {value: 'end', index: 3}],
       [LINE, FORWARD, {value: 'end', index: 0}, {value: 'end', index: 3}],
 
       [LINE, BACKWARD,
           {value: 'start ', index: 0}, {value: 'same line', index: 9}],
 
       [LINE, BACKWARD,
-          {value: undefined, index: 0}, {value: undefined, index: 0}],
+          {value: 'start ', index: 0}, {value: 'same line', index: 9}]
   ], this.RANGE);
 });
-      
+
 TEST_F('CursorsTest', 'DontSplitOnNodeNavigation', function() {
   this.runWithLoadedTree(this.multiInlineDoc, function(root) {
     var para = root.firstChild;
     assertEquals('paragraph', para.role);
     var cursor = new cursors.Cursor(para.firstChild, 0);
     cursor = cursor.move(DOM_NODE, DIRECTIONAL, FORWARD);
     assertEquals('staticText', cursor.node.role);
     assertEquals('end', cursor.node.name);
 
     cursor = cursor.move(DOM_NODE, DIRECTIONAL, BACKWARD);
@@ skipping 79 matching lines @@
     assertEquals('inlineTextBox', secondLine.role);
     assertEquals('diff ', secondLine.name);
 
     var secondLineCursor = new cursors.Cursor(secondLine, -1);
     assertEquals(-1, secondLineCursor.selectionIndex_);
     secondLineCursor = new cursors.Cursor(secondLine, 0);
     secondLineCursor.index = 0;
     assertEquals(6, secondLineCursor.selectionIndex_);
   });
 });