content/browser/accessibility/browser_accessibility_manager_unittest.cc

   1 // Copyright (c) 2012 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/strings/string16.h"
   6 #include "base/strings/utf_string_conversions.h"
   7 #include "content/browser/accessibility/browser_accessibility.h"
   8 #include "content/browser/accessibility/browser_accessibility_manager.h"
   9 #if defined(OS_WIN)
  10 #include "content/browser/accessibility/browser_accessibility_win.h"
  11 #endif
  12 #include "content/common/accessibility_messages.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14
  15 namespace content {
  16 namespace {
  17
  18 // Subclass of BrowserAccessibility that counts the number of instances.
  19 class CountedBrowserAccessibility : public BrowserAccessibility {
  20  public:
  21   CountedBrowserAccessibility() {
  22     global_obj_count_++;
  23     native_ref_count_ = 1;
  24   }
  25   virtual ~CountedBrowserAccessibility() {
  26     global_obj_count_--;
  27   }
  28
  29   virtual void NativeAddReference() OVERRIDE {
  30     native_ref_count_++;
  31   }
  32
  33   virtual void NativeReleaseReference() OVERRIDE {
  34     native_ref_count_--;
  35     if (native_ref_count_ == 0)
  36       delete this;
  37   }
  38
  39   int native_ref_count_;
  40   static int global_obj_count_;
  41
  42 #if defined(OS_WIN)
  43   // Adds some padding to prevent a heap-buffer-overflow when an instance of
  44   // this class is casted into a BrowserAccessibilityWin pointer.
  45   // http://crbug.com/235508
  46   // TODO(dmazzoni): Fix this properly.
  47   static const size_t kDataSize = sizeof(int) + sizeof(BrowserAccessibility);
  48   uint8 padding_[sizeof(BrowserAccessibilityWin) - kDataSize];
  49 #endif
  50 };
  51
  52 int CountedBrowserAccessibility::global_obj_count_ = 0;
  53
  54 // Factory that creates a CountedBrowserAccessibility.
  55 class CountedBrowserAccessibilityFactory
  56     : public BrowserAccessibilityFactory {
  57  public:
  58   virtual ~CountedBrowserAccessibilityFactory() {}
  59   virtual BrowserAccessibility* Create() OVERRIDE {
  60     return new CountedBrowserAccessibility();
  61   }
  62 };
  63
  64 class TestBrowserAccessibilityDelegate
  65     : public BrowserAccessibilityDelegate {
  66  public:
  67   TestBrowserAccessibilityDelegate()
  68       : got_fatal_error_(false) {}
  69
  70   virtual void SetAccessibilityFocus(int acc_obj_id) OVERRIDE {}
  71   virtual void AccessibilityDoDefaultAction(int acc_obj_id) OVERRIDE {}
  72   virtual void AccessibilityScrollToMakeVisible(
  73       int acc_obj_id, gfx::Rect subfocus) OVERRIDE {}
  74   virtual void AccessibilityScrollToPoint(
  75       int acc_obj_id, gfx::Point point) OVERRIDE {}
  76   virtual void AccessibilitySetTextSelection(
  77       int acc_obj_id, int start_offset, int end_offset) OVERRIDE {}
  78   virtual bool HasFocus() const OVERRIDE {
  79     return false;
  80   }
  81   virtual gfx::Rect GetViewBounds() const OVERRIDE {
  82     return gfx::Rect();
  83   }
  84   virtual gfx::Point GetLastTouchEventLocation() const OVERRIDE {
  85     return gfx::Point();
  86   }
  87   virtual void FatalAccessibilityTreeError() OVERRIDE {
  88     got_fatal_error_ = true;
  89   }
  90
  91   bool got_fatal_error() const { return got_fatal_error_; }
  92   void reset_got_fatal_error() { got_fatal_error_ = false; }
  93
  94 private:
  95   bool got_fatal_error_;
  96 };
  97
  98 }  // anonymous namespace
  99
 100 TEST(BrowserAccessibilityManagerTest, TestNoLeaks) {
 101   // Create ui::AXNodeData objects for a simple document tree,
 102   // representing the accessibility information used to initialize
 103   // BrowserAccessibilityManager.
 104   ui::AXNodeData button;
 105   button.id = 2;
 106   button.SetName("Button");
 107   button.role = ui::AX_ROLE_BUTTON;
 108   button.state = 0;
 109
 110   ui::AXNodeData checkbox;
 111   checkbox.id = 3;
 112   checkbox.SetName("Checkbox");
 113   checkbox.role = ui::AX_ROLE_CHECK_BOX;
 114   checkbox.state = 0;
 115
 116   ui::AXNodeData root;
 117   root.id = 1;
 118   root.SetName("Document");
 119   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 120   root.state = 0;
 121   root.child_ids.push_back(2);
 122   root.child_ids.push_back(3);
 123
 124   // Construct a BrowserAccessibilityManager with this
 125   // ui::AXNodeData tree and a factory for an instance-counting
 126   // BrowserAccessibility, and ensure that exactly 3 instances were
 127   // created. Note that the manager takes ownership of the factory.
 128   CountedBrowserAccessibility::global_obj_count_ = 0;
 129   BrowserAccessibilityManager* manager =
 130       BrowserAccessibilityManager::Create(
 131           root,
 132           NULL,
 133           new CountedBrowserAccessibilityFactory());
 134   manager->UpdateNodesForTesting(button, checkbox);
 135
 136   ASSERT_EQ(3, CountedBrowserAccessibility::global_obj_count_);
 137
 138   // Delete the manager and test that all 3 instances are deleted.
 139   delete manager;
 140   ASSERT_EQ(0, CountedBrowserAccessibility::global_obj_count_);
 141
 142   // Construct a manager again, and this time save references to two of
 143   // the three nodes in the tree.
 144   manager =
 145       BrowserAccessibilityManager::Create(
 146           root,
 147           NULL,
 148           new CountedBrowserAccessibilityFactory());
 149   manager->UpdateNodesForTesting(button, checkbox);
 150   ASSERT_EQ(3, CountedBrowserAccessibility::global_obj_count_);
 151
 152   CountedBrowserAccessibility* root_accessible =
 153       static_cast<CountedBrowserAccessibility*>(manager->GetRoot());
 154   root_accessible->NativeAddReference();
 155   CountedBrowserAccessibility* child1_accessible =
 156       static_cast<CountedBrowserAccessibility*>(
 157           root_accessible->PlatformGetChild(1));
 158   child1_accessible->NativeAddReference();
 159
 160   // Now delete the manager, and only one of the three nodes in the tree
 161   // should be released.
 162   delete manager;
 163   ASSERT_EQ(2, CountedBrowserAccessibility::global_obj_count_);
 164
 165   // Release each of our references and make sure that each one results in
 166   // the instance being deleted as its reference count hits zero.
 167   root_accessible->NativeReleaseReference();
 168   ASSERT_EQ(1, CountedBrowserAccessibility::global_obj_count_);
 169   child1_accessible->NativeReleaseReference();
 170   ASSERT_EQ(0, CountedBrowserAccessibility::global_obj_count_);
 171 }
 172
 173 TEST(BrowserAccessibilityManagerTest, TestReuseBrowserAccessibilityObjects) {
 174   // Make sure that changes to a subtree reuse as many objects as possible.
 175
 176   // Tree 1:
 177   //
 178   // root
 179   //   child1
 180   //   child2
 181   //   child3
 182
 183   ui::AXNodeData tree1_child1;
 184   tree1_child1.id = 2;
 185   tree1_child1.SetName("Child1");
 186   tree1_child1.role = ui::AX_ROLE_BUTTON;
 187   tree1_child1.state = 0;
 188
 189   ui::AXNodeData tree1_child2;
 190   tree1_child2.id = 3;
 191   tree1_child2.SetName("Child2");
 192   tree1_child2.role = ui::AX_ROLE_BUTTON;
 193   tree1_child2.state = 0;
 194
 195   ui::AXNodeData tree1_child3;
 196   tree1_child3.id = 4;
 197   tree1_child3.SetName("Child3");
 198   tree1_child3.role = ui::AX_ROLE_BUTTON;
 199   tree1_child3.state = 0;
 200
 201   ui::AXNodeData tree1_root;
 202   tree1_root.id = 1;
 203   tree1_root.SetName("Document");
 204   tree1_root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 205   tree1_root.state = 0;
 206   tree1_root.child_ids.push_back(2);
 207   tree1_root.child_ids.push_back(3);
 208   tree1_root.child_ids.push_back(4);
 209
 210   // Tree 2:
 211   //
 212   // root
 213   //   child0  <-- inserted
 214   //   child1
 215   //   child2
 216   //           <-- child3 deleted
 217
 218   ui::AXNodeData tree2_child0;
 219   tree2_child0.id = 5;
 220   tree2_child0.SetName("Child0");
 221   tree2_child0.role = ui::AX_ROLE_BUTTON;
 222   tree2_child0.state = 0;
 223
 224   ui::AXNodeData tree2_root;
 225   tree2_root.id = 1;
 226   tree2_root.SetName("DocumentChanged");
 227   tree2_root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 228   tree2_root.state = 0;
 229   tree2_root.child_ids.push_back(5);
 230   tree2_root.child_ids.push_back(2);
 231   tree2_root.child_ids.push_back(3);
 232
 233   // Construct a BrowserAccessibilityManager with tree1.
 234   CountedBrowserAccessibility::global_obj_count_ = 0;
 235   BrowserAccessibilityManager* manager =
 236       BrowserAccessibilityManager::Create(
 237           tree1_root,
 238           NULL,
 239           new CountedBrowserAccessibilityFactory());
 240   manager->UpdateNodesForTesting(tree1_child1, tree1_child2, tree1_child3);
 241   ASSERT_EQ(4, CountedBrowserAccessibility::global_obj_count_);
 242
 243   // Save references to all of the objects.
 244   CountedBrowserAccessibility* root_accessible =
 245       static_cast<CountedBrowserAccessibility*>(manager->GetRoot());
 246   root_accessible->NativeAddReference();
 247   CountedBrowserAccessibility* child1_accessible =
 248       static_cast<CountedBrowserAccessibility*>(
 249           root_accessible->PlatformGetChild(0));
 250   child1_accessible->NativeAddReference();
 251   CountedBrowserAccessibility* child2_accessible =
 252       static_cast<CountedBrowserAccessibility*>(
 253           root_accessible->PlatformGetChild(1));
 254   child2_accessible->NativeAddReference();
 255   CountedBrowserAccessibility* child3_accessible =
 256       static_cast<CountedBrowserAccessibility*>(
 257           root_accessible->PlatformGetChild(2));
 258   child3_accessible->NativeAddReference();
 259
 260   // Check the index in parent.
 261   EXPECT_EQ(0, child1_accessible->index_in_parent());
 262   EXPECT_EQ(1, child2_accessible->index_in_parent());
 263   EXPECT_EQ(2, child3_accessible->index_in_parent());
 264
 265   // Process a notification containing the changed subtree.
 266   std::vector<AccessibilityHostMsg_EventParams> params;
 267   params.push_back(AccessibilityHostMsg_EventParams());
 268   AccessibilityHostMsg_EventParams* msg = &params[0];
 269   msg->event_type = ui::AX_EVENT_CHILDREN_CHANGED;
 270   msg->nodes.push_back(tree2_root);
 271   msg->nodes.push_back(tree2_child0);
 272   msg->id = tree2_root.id;
 273   manager->OnAccessibilityEvents(params);
 274
 275   // There should be 5 objects now: the 4 from the new tree, plus the
 276   // reference to child3 we kept.
 277   EXPECT_EQ(5, CountedBrowserAccessibility::global_obj_count_);
 278
 279   // Check that our references to the root, child1, and child2 are still valid,
 280   // but that the reference to child3 is now invalid.
 281   EXPECT_TRUE(root_accessible->instance_active());
 282   EXPECT_TRUE(child1_accessible->instance_active());
 283   EXPECT_TRUE(child2_accessible->instance_active());
 284   EXPECT_FALSE(child3_accessible->instance_active());
 285
 286   // Check that the index in parent has been updated.
 287   EXPECT_EQ(1, child1_accessible->index_in_parent());
 288   EXPECT_EQ(2, child2_accessible->index_in_parent());
 289
 290   // Release our references. The object count should only decrease by 1
 291   // for child3.
 292   root_accessible->NativeReleaseReference();
 293   child1_accessible->NativeReleaseReference();
 294   child2_accessible->NativeReleaseReference();
 295   child3_accessible->NativeReleaseReference();
 296
 297   EXPECT_EQ(4, CountedBrowserAccessibility::global_obj_count_);
 298
 299   // Delete the manager and make sure all memory is cleaned up.
 300   delete manager;
 301   ASSERT_EQ(0, CountedBrowserAccessibility::global_obj_count_);
 302 }
 303
 304 TEST(BrowserAccessibilityManagerTest, TestReuseBrowserAccessibilityObjects2) {
 305   // Similar to the test above, but with a more complicated tree.
 306
 307   // Tree 1:
 308   //
 309   // root
 310   //   container
 311   //     child1
 312   //       grandchild1
 313   //     child2
 314   //       grandchild2
 315   //     child3
 316   //       grandchild3
 317
 318   ui::AXNodeData tree1_grandchild1;
 319   tree1_grandchild1.id = 4;
 320   tree1_grandchild1.SetName("GrandChild1");
 321   tree1_grandchild1.role = ui::AX_ROLE_BUTTON;
 322   tree1_grandchild1.state = 0;
 323
 324   ui::AXNodeData tree1_child1;
 325   tree1_child1.id = 3;
 326   tree1_child1.SetName("Child1");
 327   tree1_child1.role = ui::AX_ROLE_BUTTON;
 328   tree1_child1.state = 0;
 329   tree1_child1.child_ids.push_back(4);
 330
 331   ui::AXNodeData tree1_grandchild2;
 332   tree1_grandchild2.id = 6;
 333   tree1_grandchild2.SetName("GrandChild1");
 334   tree1_grandchild2.role = ui::AX_ROLE_BUTTON;
 335   tree1_grandchild2.state = 0;
 336
 337   ui::AXNodeData tree1_child2;
 338   tree1_child2.id = 5;
 339   tree1_child2.SetName("Child2");
 340   tree1_child2.role = ui::AX_ROLE_BUTTON;
 341   tree1_child2.state = 0;
 342   tree1_child2.child_ids.push_back(6);
 343
 344   ui::AXNodeData tree1_grandchild3;
 345   tree1_grandchild3.id = 8;
 346   tree1_grandchild3.SetName("GrandChild3");
 347   tree1_grandchild3.role = ui::AX_ROLE_BUTTON;
 348   tree1_grandchild3.state = 0;
 349
 350   ui::AXNodeData tree1_child3;
 351   tree1_child3.id = 7;
 352   tree1_child3.SetName("Child3");
 353   tree1_child3.role = ui::AX_ROLE_BUTTON;
 354   tree1_child3.state = 0;
 355   tree1_child3.child_ids.push_back(8);
 356
 357   ui::AXNodeData tree1_container;
 358   tree1_container.id = 2;
 359   tree1_container.SetName("Container");
 360   tree1_container.role = ui::AX_ROLE_GROUP;
 361   tree1_container.state = 0;
 362   tree1_container.child_ids.push_back(3);
 363   tree1_container.child_ids.push_back(5);
 364   tree1_container.child_ids.push_back(7);
 365
 366   ui::AXNodeData tree1_root;
 367   tree1_root.id = 1;
 368   tree1_root.SetName("Document");
 369   tree1_root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 370   tree1_root.state = 0;
 371   tree1_root.child_ids.push_back(2);
 372
 373   // Tree 2:
 374   //
 375   // root
 376   //   container
 377   //     child0         <-- inserted
 378   //       grandchild0  <--
 379   //     child1
 380   //       grandchild1
 381   //     child2
 382   //       grandchild2
 383   //                    <-- child3 (and grandchild3) deleted
 384
 385   ui::AXNodeData tree2_grandchild0;
 386   tree2_grandchild0.id = 9;
 387   tree2_grandchild0.SetName("GrandChild0");
 388   tree2_grandchild0.role = ui::AX_ROLE_BUTTON;
 389   tree2_grandchild0.state = 0;
 390
 391   ui::AXNodeData tree2_child0;
 392   tree2_child0.id = 10;
 393   tree2_child0.SetName("Child0");
 394   tree2_child0.role = ui::AX_ROLE_BUTTON;
 395   tree2_child0.state = 0;
 396   tree2_child0.child_ids.push_back(9);
 397
 398   ui::AXNodeData tree2_container;
 399   tree2_container.id = 2;
 400   tree2_container.SetName("Container");
 401   tree2_container.role = ui::AX_ROLE_GROUP;
 402   tree2_container.state = 0;
 403   tree2_container.child_ids.push_back(10);
 404   tree2_container.child_ids.push_back(3);
 405   tree2_container.child_ids.push_back(5);
 406
 407   // Construct a BrowserAccessibilityManager with tree1.
 408   CountedBrowserAccessibility::global_obj_count_ = 0;
 409   BrowserAccessibilityManager* manager =
 410       BrowserAccessibilityManager::Create(
 411           tree1_root,
 412           NULL,
 413           new CountedBrowserAccessibilityFactory());
 414   manager->UpdateNodesForTesting(tree1_container,
 415                                  tree1_child1, tree1_grandchild1,
 416                                  tree1_child2, tree1_grandchild2,
 417                                  tree1_child3, tree1_grandchild3);
 418   ASSERT_EQ(8, CountedBrowserAccessibility::global_obj_count_);
 419
 420   // Save references to some objects.
 421   CountedBrowserAccessibility* root_accessible =
 422       static_cast<CountedBrowserAccessibility*>(manager->GetRoot());
 423   root_accessible->NativeAddReference();
 424   CountedBrowserAccessibility* container_accessible =
 425       static_cast<CountedBrowserAccessibility*>(
 426           root_accessible->PlatformGetChild(0));
 427   container_accessible->NativeAddReference();
 428   CountedBrowserAccessibility* child2_accessible =
 429       static_cast<CountedBrowserAccessibility*>(
 430           container_accessible->PlatformGetChild(1));
 431   child2_accessible->NativeAddReference();
 432   CountedBrowserAccessibility* child3_accessible =
 433       static_cast<CountedBrowserAccessibility*>(
 434           container_accessible->PlatformGetChild(2));
 435   child3_accessible->NativeAddReference();
 436
 437   // Check the index in parent.
 438   EXPECT_EQ(1, child2_accessible->index_in_parent());
 439   EXPECT_EQ(2, child3_accessible->index_in_parent());
 440
 441   // Process a notification containing the changed subtree rooted at
 442   // the container.
 443   std::vector<AccessibilityHostMsg_EventParams> params;
 444   params.push_back(AccessibilityHostMsg_EventParams());
 445   AccessibilityHostMsg_EventParams* msg = &params[0];
 446   msg->event_type = ui::AX_EVENT_CHILDREN_CHANGED;
 447   msg->nodes.push_back(tree2_container);
 448   msg->nodes.push_back(tree2_child0);
 449   msg->nodes.push_back(tree2_grandchild0);
 450   msg->id = tree2_container.id;
 451   manager->OnAccessibilityEvents(params);
 452
 453   // There should be 9 objects now: the 8 from the new tree, plus the
 454   // reference to child3 we kept.
 455   EXPECT_EQ(9, CountedBrowserAccessibility::global_obj_count_);
 456
 457   // Check that our references to the root and container and child2 are
 458   // still valid, but that the reference to child3 is now invalid.
 459   EXPECT_TRUE(root_accessible->instance_active());
 460   EXPECT_TRUE(container_accessible->instance_active());
 461   EXPECT_TRUE(child2_accessible->instance_active());
 462   EXPECT_FALSE(child3_accessible->instance_active());
 463
 464   // Ensure that we retain the parent of the detached subtree.
 465   EXPECT_EQ(root_accessible, container_accessible->parent());
 466   EXPECT_EQ(0, container_accessible->index_in_parent());
 467
 468   // Check that the index in parent has been updated.
 469   EXPECT_EQ(2, child2_accessible->index_in_parent());
 470
 471   // Release our references. The object count should only decrease by 1
 472   // for child3.
 473   root_accessible->NativeReleaseReference();
 474   container_accessible->NativeReleaseReference();
 475   child2_accessible->NativeReleaseReference();
 476   child3_accessible->NativeReleaseReference();
 477
 478   EXPECT_EQ(8, CountedBrowserAccessibility::global_obj_count_);
 479
 480   // Delete the manager and make sure all memory is cleaned up.
 481   delete manager;
 482   ASSERT_EQ(0, CountedBrowserAccessibility::global_obj_count_);
 483 }
 484
 485 TEST(BrowserAccessibilityManagerTest, TestMoveChildUp) {
 486   // Tree 1:
 487   //
 488   // 1
 489   //   2
 490   //   3
 491   //     4
 492
 493   ui::AXNodeData tree1_4;
 494   tree1_4.id = 4;
 495   tree1_4.state = 0;
 496
 497   ui::AXNodeData tree1_3;
 498   tree1_3.id = 3;
 499   tree1_3.state = 0;
 500   tree1_3.child_ids.push_back(4);
 501
 502   ui::AXNodeData tree1_2;
 503   tree1_2.id = 2;
 504   tree1_2.state = 0;
 505
 506   ui::AXNodeData tree1_1;
 507   tree1_1.id = 1;
 508   tree1_1.role = ui::AX_ROLE_ROOT_WEB_AREA;
 509   tree1_1.state = 0;
 510   tree1_1.child_ids.push_back(2);
 511   tree1_1.child_ids.push_back(3);
 512
 513   // Tree 2:
 514   //
 515   // 1
 516   //   4    <-- moves up a level and gains child
 517   //     6  <-- new
 518   //   5    <-- new
 519
 520   ui::AXNodeData tree2_6;
 521   tree2_6.id = 6;
 522   tree2_6.state = 0;
 523
 524   ui::AXNodeData tree2_5;
 525   tree2_5.id = 5;
 526   tree2_5.state = 0;
 527
 528   ui::AXNodeData tree2_4;
 529   tree2_4.id = 4;
 530   tree2_4.state = 0;
 531   tree2_4.child_ids.push_back(6);
 532
 533   ui::AXNodeData tree2_1;
 534   tree2_1.id = 1;
 535   tree2_1.state = 0;
 536   tree2_1.child_ids.push_back(4);
 537   tree2_1.child_ids.push_back(5);
 538
 539   // Construct a BrowserAccessibilityManager with tree1.
 540   CountedBrowserAccessibility::global_obj_count_ = 0;
 541   BrowserAccessibilityManager* manager =
 542       BrowserAccessibilityManager::Create(
 543           tree1_1,
 544           NULL,
 545           new CountedBrowserAccessibilityFactory());
 546   manager->UpdateNodesForTesting(tree1_2, tree1_3, tree1_4);
 547   ASSERT_EQ(4, CountedBrowserAccessibility::global_obj_count_);
 548
 549   // Process a notification containing the changed subtree.
 550   std::vector<AccessibilityHostMsg_EventParams> params;
 551   params.push_back(AccessibilityHostMsg_EventParams());
 552   AccessibilityHostMsg_EventParams* msg = &params[0];
 553   msg->event_type = ui::AX_EVENT_CHILDREN_CHANGED;
 554   msg->nodes.push_back(tree2_1);
 555   msg->nodes.push_back(tree2_4);
 556   msg->nodes.push_back(tree2_5);
 557   msg->nodes.push_back(tree2_6);
 558   msg->id = tree2_1.id;
 559   manager->OnAccessibilityEvents(params);
 560
 561   // There should be 4 objects now.
 562   EXPECT_EQ(4, CountedBrowserAccessibility::global_obj_count_);
 563
 564   // Delete the manager and make sure all memory is cleaned up.
 565   delete manager;
 566   ASSERT_EQ(0, CountedBrowserAccessibility::global_obj_count_);
 567 }
 568
 569 // Crashes on Windows. http://crbug.com/304130
 570 #if defined(OS_WIN)
 571 #define MAYBE_TestFatalError DISABLED_TestFatalError
 572 #else
 573 #define MAYBE_TestFatalError TestFatalError
 574 #endif
 575 TEST(BrowserAccessibilityManagerTest, MAYBE_TestFatalError) {
 576   // Test that BrowserAccessibilityManager raises a fatal error
 577   // (which will crash the renderer) if the same id is used in
 578   // two places in the tree.
 579
 580   ui::AXNodeData root;
 581   root.id = 1;
 582   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 583   root.child_ids.push_back(2);
 584   root.child_ids.push_back(2);
 585
 586   CountedBrowserAccessibilityFactory* factory =
 587       new CountedBrowserAccessibilityFactory();
 588   scoped_ptr<TestBrowserAccessibilityDelegate> delegate(
 589       new TestBrowserAccessibilityDelegate());
 590   scoped_ptr<BrowserAccessibilityManager> manager;
 591   ASSERT_FALSE(delegate->got_fatal_error());
 592   manager.reset(BrowserAccessibilityManager::Create(
 593       root,
 594       delegate.get(),
 595       factory));
 596   ASSERT_TRUE(delegate->got_fatal_error());
 597
 598   ui::AXNodeData root2;
 599   root2.id = 1;
 600   root2.role = ui::AX_ROLE_ROOT_WEB_AREA;
 601   root2.child_ids.push_back(2);
 602   root2.child_ids.push_back(3);
 603
 604   ui::AXNodeData child1;
 605   child1.id = 2;
 606   child1.child_ids.push_back(4);
 607   child1.child_ids.push_back(5);
 608
 609   ui::AXNodeData child2;
 610   child2.id = 3;
 611   child2.child_ids.push_back(6);
 612   child2.child_ids.push_back(5);  // Duplicate
 613
 614   delegate->reset_got_fatal_error();
 615   factory = new CountedBrowserAccessibilityFactory();
 616   manager.reset(BrowserAccessibilityManager::Create(
 617       root2,
 618       delegate.get(),
 619       factory));
 620   ASSERT_FALSE(delegate->got_fatal_error());
 621   manager->UpdateNodesForTesting(child1, child2);
 622   ASSERT_TRUE(delegate->got_fatal_error());
 623 }
 624
 625 TEST(BrowserAccessibilityManagerTest, BoundsForRange) {
 626   ui::AXNodeData root;
 627   root.id = 1;
 628   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 629
 630   ui::AXNodeData static_text;
 631   static_text.id = 2;
 632   static_text.SetValue("Hello, world.");
 633   static_text.role = ui::AX_ROLE_STATIC_TEXT;
 634   static_text.location = gfx::Rect(100, 100, 29, 18);
 635   root.child_ids.push_back(2);
 636
 637   ui::AXNodeData inline_text1;
 638   inline_text1.id = 3;
 639   inline_text1.SetValue("Hello, ");
 640   inline_text1.role = ui::AX_ROLE_INLINE_TEXT_BOX;
 641   inline_text1.location = gfx::Rect(100, 100, 29, 9);
 642   inline_text1.AddIntAttribute(ui::AX_ATTR_TEXT_DIRECTION,
 643                                ui::AX_TEXT_DIRECTION_LR);
 644   std::vector<int32> character_offsets1;
 645   character_offsets1.push_back(6);   // 0
 646   character_offsets1.push_back(11);  // 1
 647   character_offsets1.push_back(16);  // 2
 648   character_offsets1.push_back(21);  // 3
 649   character_offsets1.push_back(26);  // 4
 650   character_offsets1.push_back(29);  // 5
 651   character_offsets1.push_back(29);  // 6 (note that the space has no width)
 652   inline_text1.AddIntListAttribute(
 653       ui::AX_ATTR_CHARACTER_OFFSETS, character_offsets1);
 654   static_text.child_ids.push_back(3);
 655
 656   ui::AXNodeData inline_text2;
 657   inline_text2.id = 4;
 658   inline_text2.SetValue("world.");
 659   inline_text2.role = ui::AX_ROLE_INLINE_TEXT_BOX;
 660   inline_text2.location = gfx::Rect(100, 109, 28, 9);
 661   inline_text2.AddIntAttribute(ui::AX_ATTR_TEXT_DIRECTION,
 662                                ui::AX_TEXT_DIRECTION_LR);
 663   std::vector<int32> character_offsets2;
 664   character_offsets2.push_back(5);
 665   character_offsets2.push_back(10);
 666   character_offsets2.push_back(15);
 667   character_offsets2.push_back(20);
 668   character_offsets2.push_back(25);
 669   character_offsets2.push_back(28);
 670   inline_text2.AddIntListAttribute(
 671       ui::AX_ATTR_CHARACTER_OFFSETS, character_offsets2);
 672   static_text.child_ids.push_back(4);
 673
 674   scoped_ptr<BrowserAccessibilityManager> manager(
 675       BrowserAccessibilityManager::Create(
 676           root,
 677           NULL,
 678           new CountedBrowserAccessibilityFactory()));
 679   manager->UpdateNodesForTesting(static_text, inline_text1, inline_text2);
 680
 681   BrowserAccessibility* root_accessible = manager->GetRoot();
 682   BrowserAccessibility* static_text_accessible =
 683       root_accessible->PlatformGetChild(0);
 684
 685   EXPECT_EQ(gfx::Rect(100, 100, 6, 9).ToString(),
 686             static_text_accessible->GetLocalBoundsForRange(0, 1).ToString());
 687
 688   EXPECT_EQ(gfx::Rect(100, 100, 26, 9).ToString(),
 689             static_text_accessible->GetLocalBoundsForRange(0, 5).ToString());
 690
 691   EXPECT_EQ(gfx::Rect(100, 109, 5, 9).ToString(),
 692             static_text_accessible->GetLocalBoundsForRange(7, 1).ToString());
 693
 694   EXPECT_EQ(gfx::Rect(100, 109, 25, 9).ToString(),
 695             static_text_accessible->GetLocalBoundsForRange(7, 5).ToString());
 696
 697   EXPECT_EQ(gfx::Rect(100, 100, 29, 18).ToString(),
 698             static_text_accessible->GetLocalBoundsForRange(5, 3).ToString());
 699
 700   EXPECT_EQ(gfx::Rect(100, 100, 29, 18).ToString(),
 701             static_text_accessible->GetLocalBoundsForRange(0, 13).ToString());
 702
 703   // Test range that's beyond the text.
 704   EXPECT_EQ(gfx::Rect(100, 100, 29, 18).ToString(),
 705             static_text_accessible->GetLocalBoundsForRange(-1, 999).ToString());
 706
 707   // Test that we can call bounds for range on the parent element, too,
 708   // and it still works.
 709   EXPECT_EQ(gfx::Rect(100, 100, 29, 18).ToString(),
 710             root_accessible->GetLocalBoundsForRange(0, 13).ToString());
 711 }
 712
 713 TEST(BrowserAccessibilityManagerTest, BoundsForRangeBiDi) {
 714   // In this example, we assume that the string "123abc" is rendered with
 715   // "123" going left-to-right and "abc" going right-to-left. In other
 716   // words, on-screen it would look like "123cba". This is possible to
 717   // acheive if the source string had unicode control characters
 718   // to switch directions. This test doesn't worry about how, though - it just
 719   // tests that if something like that were to occur, GetLocalBoundsForRange
 720   // returns the correct bounds for different ranges.
 721
 722   ui::AXNodeData root;
 723   root.id = 1;
 724   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 725
 726   ui::AXNodeData static_text;
 727   static_text.id = 2;
 728   static_text.SetValue("123abc");
 729   static_text.role = ui::AX_ROLE_STATIC_TEXT;
 730   static_text.location = gfx::Rect(100, 100, 60, 20);
 731   root.child_ids.push_back(2);
 732
 733   ui::AXNodeData inline_text1;
 734   inline_text1.id = 3;
 735   inline_text1.SetValue("123");
 736   inline_text1.role = ui::AX_ROLE_INLINE_TEXT_BOX;
 737   inline_text1.location = gfx::Rect(100, 100, 30, 20);
 738   inline_text1.AddIntAttribute(ui::AX_ATTR_TEXT_DIRECTION,
 739                                ui::AX_TEXT_DIRECTION_LR);
 740   std::vector<int32> character_offsets1;
 741   character_offsets1.push_back(10);  // 0
 742   character_offsets1.push_back(20);  // 1
 743   character_offsets1.push_back(30);  // 2
 744   inline_text1.AddIntListAttribute(
 745       ui::AX_ATTR_CHARACTER_OFFSETS, character_offsets1);
 746   static_text.child_ids.push_back(3);
 747
 748   ui::AXNodeData inline_text2;
 749   inline_text2.id = 4;
 750   inline_text2.SetValue("abc");
 751   inline_text2.role = ui::AX_ROLE_INLINE_TEXT_BOX;
 752   inline_text2.location = gfx::Rect(130, 100, 30, 20);
 753   inline_text2.AddIntAttribute(ui::AX_ATTR_TEXT_DIRECTION,
 754                                ui::AX_TEXT_DIRECTION_RL);
 755   std::vector<int32> character_offsets2;
 756   character_offsets2.push_back(10);
 757   character_offsets2.push_back(20);
 758   character_offsets2.push_back(30);
 759   inline_text2.AddIntListAttribute(
 760       ui::AX_ATTR_CHARACTER_OFFSETS, character_offsets2);
 761   static_text.child_ids.push_back(4);
 762
 763   scoped_ptr<BrowserAccessibilityManager> manager(
 764       BrowserAccessibilityManager::Create(
 765           root,
 766           NULL,
 767           new CountedBrowserAccessibilityFactory()));
 768   manager->UpdateNodesForTesting(static_text, inline_text1, inline_text2);
 769
 770   BrowserAccessibility* root_accessible = manager->GetRoot();
 771   BrowserAccessibility* static_text_accessible =
 772       root_accessible->PlatformGetChild(0);
 773
 774   EXPECT_EQ(gfx::Rect(100, 100, 60, 20).ToString(),
 775             static_text_accessible->GetLocalBoundsForRange(0, 6).ToString());
 776
 777   EXPECT_EQ(gfx::Rect(100, 100, 10, 20).ToString(),
 778             static_text_accessible->GetLocalBoundsForRange(0, 1).ToString());
 779
 780   EXPECT_EQ(gfx::Rect(100, 100, 30, 20).ToString(),
 781             static_text_accessible->GetLocalBoundsForRange(0, 3).ToString());
 782
 783   EXPECT_EQ(gfx::Rect(150, 100, 10, 20).ToString(),
 784             static_text_accessible->GetLocalBoundsForRange(3, 1).ToString());
 785
 786   EXPECT_EQ(gfx::Rect(130, 100, 30, 20).ToString(),
 787             static_text_accessible->GetLocalBoundsForRange(3, 3).ToString());
 788
 789   // This range is only two characters, but because of the direction switch
 790   // the bounds are as wide as four characters.
 791   EXPECT_EQ(gfx::Rect(120, 100, 40, 20).ToString(),
 792             static_text_accessible->GetLocalBoundsForRange(2, 2).ToString());
 793 }
 794
 795 #if defined(OS_WIN)
 796 #define MAYBE_BoundsForRangeOnParentElement \
 797   DISABLED_BoundsForRangeOnParentElement
 798 #else
 799 #define MAYBE_BoundsForRangeOnParentElement BoundsForRangeOnParentElement
 800 #endif
 801 TEST(BrowserAccessibilityManagerTest, MAYBE_BoundsForRangeOnParentElement) {
 802   ui::AXNodeData root;
 803   root.id = 1;
 804   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 805   root.child_ids.push_back(2);
 806
 807   ui::AXNodeData div;
 808   div.id = 2;
 809   div.role = ui::AX_ROLE_DIV;
 810   div.location = gfx::Rect(100, 100, 100, 20);
 811   div.child_ids.push_back(3);
 812   div.child_ids.push_back(4);
 813   div.child_ids.push_back(5);
 814
 815   ui::AXNodeData static_text1;
 816   static_text1.id = 3;
 817   static_text1.SetValue("AB");
 818   static_text1.role = ui::AX_ROLE_STATIC_TEXT;
 819   static_text1.location = gfx::Rect(100, 100, 40, 20);
 820   static_text1.child_ids.push_back(6);
 821
 822   ui::AXNodeData img;
 823   img.id = 4;
 824   img.role = ui::AX_ROLE_IMAGE;
 825   img.location = gfx::Rect(140, 100, 20, 20);
 826
 827   ui::AXNodeData static_text2;
 828   static_text2.id = 5;
 829   static_text2.SetValue("CD");
 830   static_text2.role = ui::AX_ROLE_STATIC_TEXT;
 831   static_text2.location = gfx::Rect(160, 100, 40, 20);
 832   static_text2.child_ids.push_back(7);
 833
 834   ui::AXNodeData inline_text1;
 835   inline_text1.id = 6;
 836   inline_text1.SetValue("AB");
 837   inline_text1.role = ui::AX_ROLE_INLINE_TEXT_BOX;
 838   inline_text1.location = gfx::Rect(100, 100, 40, 20);
 839   inline_text1.AddIntAttribute(ui::AX_ATTR_TEXT_DIRECTION,
 840                                ui::AX_TEXT_DIRECTION_LR);
 841   std::vector<int32> character_offsets1;
 842   character_offsets1.push_back(20);  // 0
 843   character_offsets1.push_back(40);  // 1
 844   inline_text1.AddIntListAttribute(
 845       ui::AX_ATTR_CHARACTER_OFFSETS, character_offsets1);
 846
 847   ui::AXNodeData inline_text2;
 848   inline_text2.id = 7;
 849   inline_text2.SetValue("CD");
 850   inline_text2.role = ui::AX_ROLE_INLINE_TEXT_BOX;
 851   inline_text2.location = gfx::Rect(160, 100, 40, 20);
 852   inline_text2.AddIntAttribute(ui::AX_ATTR_TEXT_DIRECTION,
 853                                ui::AX_TEXT_DIRECTION_LR);
 854   std::vector<int32> character_offsets2;
 855   character_offsets2.push_back(20);  // 0
 856   character_offsets2.push_back(40);  // 1
 857   inline_text2.AddIntListAttribute(
 858       ui::AX_ATTR_CHARACTER_OFFSETS, character_offsets2);
 859
 860   scoped_ptr<BrowserAccessibilityManager> manager(
 861       BrowserAccessibilityManager::Create(
 862           root,
 863           NULL,
 864           new CountedBrowserAccessibilityFactory()));
 865   manager->UpdateNodesForTesting(
 866       div, static_text1, img, static_text2, inline_text1, inline_text2);
 867
 868   BrowserAccessibility* root_accessible = manager->GetRoot();
 869
 870   EXPECT_EQ(gfx::Rect(100, 100, 20, 20).ToString(),
 871             root_accessible->GetLocalBoundsForRange(0, 1).ToString());
 872
 873   EXPECT_EQ(gfx::Rect(100, 100, 40, 20).ToString(),
 874             root_accessible->GetLocalBoundsForRange(0, 2).ToString());
 875
 876   EXPECT_EQ(gfx::Rect(100, 100, 80, 20).ToString(),
 877             root_accessible->GetLocalBoundsForRange(0, 3).ToString());
 878
 879   EXPECT_EQ(gfx::Rect(120, 100, 60, 20).ToString(),
 880             root_accessible->GetLocalBoundsForRange(1, 2).ToString());
 881
 882   EXPECT_EQ(gfx::Rect(120, 100, 80, 20).ToString(),
 883             root_accessible->GetLocalBoundsForRange(1, 3).ToString());
 884
 885   EXPECT_EQ(gfx::Rect(100, 100, 100, 20).ToString(),
 886             root_accessible->GetLocalBoundsForRange(0, 4).ToString());
 887 }
 888
 889 TEST(BrowserAccessibilityManagerTest, NextPreviousInTreeOrder) {
 890   ui::AXNodeData root;
 891   root.id = 1;
 892   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 893
 894   ui::AXNodeData node2;
 895   node2.id = 2;
 896   root.child_ids.push_back(2);
 897
 898   ui::AXNodeData node3;
 899   node3.id = 3;
 900   root.child_ids.push_back(3);
 901
 902   ui::AXNodeData node4;
 903   node4.id = 4;
 904   node3.child_ids.push_back(4);
 905
 906   ui::AXNodeData node5;
 907   node5.id = 5;
 908   root.child_ids.push_back(5);
 909
 910   scoped_ptr<BrowserAccessibilityManager> manager(
 911       BrowserAccessibilityManager::Create(
 912           root,
 913           NULL,
 914           new CountedBrowserAccessibilityFactory()));
 915   manager->UpdateNodesForTesting(node2, node3, node4, node5);
 916
 917   BrowserAccessibility* root_accessible = manager->GetRoot();
 918   BrowserAccessibility* node2_accessible = root_accessible->PlatformGetChild(0);
 919   BrowserAccessibility* node3_accessible = root_accessible->PlatformGetChild(1);
 920   BrowserAccessibility* node4_accessible =
 921       node3_accessible->PlatformGetChild(0);
 922   BrowserAccessibility* node5_accessible = root_accessible->PlatformGetChild(2);
 923
 924   ASSERT_EQ(NULL, manager->NextInTreeOrder(NULL));
 925   ASSERT_EQ(node2_accessible, manager->NextInTreeOrder(root_accessible));
 926   ASSERT_EQ(node3_accessible, manager->NextInTreeOrder(node2_accessible));
 927   ASSERT_EQ(node4_accessible, manager->NextInTreeOrder(node3_accessible));
 928   ASSERT_EQ(node5_accessible, manager->NextInTreeOrder(node4_accessible));
 929   ASSERT_EQ(NULL, manager->NextInTreeOrder(node5_accessible));
 930
 931   ASSERT_EQ(NULL, manager->PreviousInTreeOrder(NULL));
 932   ASSERT_EQ(node4_accessible, manager->PreviousInTreeOrder(node5_accessible));
 933   ASSERT_EQ(node3_accessible, manager->PreviousInTreeOrder(node4_accessible));
 934   ASSERT_EQ(node2_accessible, manager->PreviousInTreeOrder(node3_accessible));
 935   ASSERT_EQ(root_accessible, manager->PreviousInTreeOrder(node2_accessible));
 936 }
 937
 938 }  // namespace content