ui/accessibility/ax_tree_unittest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/memory/scoped_ptr.h"
   6 #include "base/strings/string_number_conversions.h"
   7 #include "testing/gtest/include/gtest/gtest.h"
   8 #include "ui/accessibility/ax_node.h"
   9 #include "ui/accessibility/ax_serializable_tree.h"
  10 #include "ui/accessibility/ax_tree.h"
  11 #include "ui/accessibility/ax_tree_serializer.h"
  12
  13 namespace ui {
  14
  15 TEST(AXTreeTest, SerializeSimpleAXTree) {
  16   AXNodeData root;
  17   root.id = 1;
  18   root.role = AX_ROLE_ROOT_WEB_AREA;
  19   root.state = (1 << AX_STATE_FOCUSABLE) | (1 << AX_STATE_FOCUSED);
  20   root.location = gfx::Rect(0, 0, 800, 600);
  21   root.child_ids.push_back(2);
  22   root.child_ids.push_back(3);
  23
  24   AXNodeData button;
  25   button.id = 2;
  26   button.role = AX_ROLE_BUTTON;
  27   button.state = 0;
  28   button.location = gfx::Rect(20, 20, 200, 30);
  29
  30   AXNodeData checkbox;
  31   checkbox.id = 3;
  32   checkbox.role = AX_ROLE_CHECK_BOX;
  33   checkbox.state = 0;
  34   checkbox.location = gfx::Rect(20, 50, 200, 30);
  35
  36   AXTreeUpdate initial_state;
  37   initial_state.nodes.push_back(root);
  38   initial_state.nodes.push_back(button);
  39   initial_state.nodes.push_back(checkbox);
  40   AXSerializableTree src_tree(initial_state);
  41
  42   scoped_ptr<AXTreeSource<AXNode> > tree_source(
  43       src_tree.CreateTreeSource());
  44   AXTreeSerializer<AXNode> serializer(tree_source.get());
  45   AXTreeUpdate update;
  46   serializer.SerializeChanges(src_tree.GetRoot(), &update);
  47
  48   AXTree dst_tree;
  49   ASSERT_TRUE(dst_tree.Unserialize(update));
  50
  51   AXNode* root_node = dst_tree.GetRoot();
  52   ASSERT_TRUE(root_node != NULL);
  53   EXPECT_EQ(root.id, root_node->id());
  54   EXPECT_EQ(root.role, root_node->data().role);
  55
  56   ASSERT_EQ(2, root_node->child_count());
  57
  58   AXNode* button_node = root_node->ChildAtIndex(0);
  59   EXPECT_EQ(button.id, button_node->id());
  60   EXPECT_EQ(button.role, button_node->data().role);
  61
  62   AXNode* checkbox_node = root_node->ChildAtIndex(1);
  63   EXPECT_EQ(checkbox.id, checkbox_node->id());
  64   EXPECT_EQ(checkbox.role, checkbox_node->data().role);
  65
  66   EXPECT_EQ(
  67       "id=1 ROOT_WEB_AREA FOCUSABLE FOCUSED (0, 0)-(800, 600) child_ids=2,3\n"
  68       "  id=2 BUTTON (20, 20)-(200, 30)\n"
  69       "  id=3 CHECKBOX (20, 50)-(200, 30)\n",
  70       dst_tree.ToString());
  71 }
  72
  73 TEST(AXTreeTest, DeleteUnknownSubtreeFails) {
  74   AXNodeData root;
  75   root.id = 1;
  76   root.role = AX_ROLE_ROOT_WEB_AREA;
  77
  78   AXTreeUpdate initial_state;
  79   initial_state.nodes.push_back(root);
  80   AXTree tree(initial_state);
  81
  82   // This should fail because we're asking it to delete
  83   // a subtree rooted at id=2, which doesn't exist.
  84   AXTreeUpdate update;
  85   update.node_id_to_clear = 2;
  86   update.nodes.resize(1);
  87   update.nodes[0].id = 1;
  88   update.nodes[0].id = AX_ROLE_ROOT_WEB_AREA;
  89   EXPECT_FALSE(tree.Unserialize(update));
  90   ASSERT_EQ("Bad node_id_to_clear: 2", tree.error());
  91 }
  92
  93 TEST(AXTreeTest, LeaveOrphanedDeletedSubtreeFails) {
  94   AXTreeUpdate initial_state;
  95   initial_state.nodes.resize(3);
  96   initial_state.nodes[0].id = 1;
  97   initial_state.nodes[0].role = AX_ROLE_ROOT_WEB_AREA;
  98   initial_state.nodes[0].child_ids.push_back(2);
  99   initial_state.nodes[0].child_ids.push_back(3);
 100   initial_state.nodes[1].id = 2;
 101   initial_state.nodes[2].id = 3;
 102   AXTree tree(initial_state);
 103
 104   // This should fail because we delete a subtree rooted at id=2
 105   // but never update it.
 106   AXTreeUpdate update;
 107   update.node_id_to_clear = 2;
 108   update.nodes.resize(1);
 109   update.nodes[0].id = 3;
 110   EXPECT_FALSE(tree.Unserialize(update));
 111   ASSERT_EQ("Nodes left pending by the update: 2", tree.error());
 112 }
 113
 114 TEST(AXTreeTest, LeaveOrphanedNewChildFails) {
 115   AXTreeUpdate initial_state;
 116   initial_state.nodes.resize(1);
 117   initial_state.nodes[0].id = 1;
 118   initial_state.nodes[0].role = AX_ROLE_ROOT_WEB_AREA;
 119   AXTree tree(initial_state);
 120
 121   // This should fail because we add a new child to the root node
 122   // but never update it.
 123   AXTreeUpdate update;
 124   update.nodes.resize(1);
 125   update.nodes[0].id = 1;
 126   update.nodes[0].role = AX_ROLE_ROOT_WEB_AREA;
 127   update.nodes[0].child_ids.push_back(2);
 128   EXPECT_FALSE(tree.Unserialize(update));
 129   ASSERT_EQ("Nodes left pending by the update: 2", tree.error());
 130 }
 131
 132 TEST(AXTreeTest, DuplicateChildIdFails) {
 133   AXTreeUpdate initial_state;
 134   initial_state.nodes.resize(1);
 135   initial_state.nodes[0].id = 1;
 136   initial_state.nodes[0].role = AX_ROLE_ROOT_WEB_AREA;
 137   AXTree tree(initial_state);
 138
 139   // This should fail because a child id appears twice.
 140   AXTreeUpdate update;
 141   update.nodes.resize(2);
 142   update.nodes[0].id = 1;
 143   update.nodes[0].role = AX_ROLE_ROOT_WEB_AREA;
 144   update.nodes[0].child_ids.push_back(2);
 145   update.nodes[0].child_ids.push_back(2);
 146   update.nodes[1].id = 2;
 147   EXPECT_FALSE(tree.Unserialize(update));
 148   ASSERT_EQ("Node 1 has duplicate child id 2", tree.error());
 149 }
 150
 151 TEST(AXTreeTest, InvalidReparentingFails) {
 152   AXTreeUpdate initial_state;
 153   initial_state.nodes.resize(3);
 154   initial_state.nodes[0].id = 1;
 155   initial_state.nodes[0].role = AX_ROLE_ROOT_WEB_AREA;
 156   initial_state.nodes[0].child_ids.push_back(2);
 157   initial_state.nodes[1].id = 2;
 158   initial_state.nodes[1].child_ids.push_back(3);
 159   initial_state.nodes[2].id = 3;
 160
 161   AXTree tree(initial_state);
 162
 163   // This should fail because node 3 is reparented from node 2 to node 1
 164   // without deleting node 1's subtree first.
 165   AXTreeUpdate update;
 166   update.nodes.resize(3);
 167   update.nodes[0].id = 1;
 168   update.nodes[0].role = AX_ROLE_ROOT_WEB_AREA;
 169   update.nodes[0].child_ids.push_back(3);
 170   update.nodes[0].child_ids.push_back(2);
 171   update.nodes[1].id = 2;
 172   update.nodes[2].id = 3;
 173   EXPECT_FALSE(tree.Unserialize(update));
 174   ASSERT_EQ("Node 3 reparented from 2 to 1", tree.error());
 175 }
 176
 177 }  // namespace ui