src/content/browser/accessibility/browser_accessibility_win_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/memory/scoped_ptr.h"
   6 #include "base/strings/utf_string_conversions.h"
   7 #include "base/win/scoped_bstr.h"
   8 #include "base/win/scoped_comptr.h"
   9 #include "base/win/scoped_variant.h"
  10 #include "content/browser/accessibility/browser_accessibility_manager.h"
  11 #include "content/browser/accessibility/browser_accessibility_manager_win.h"
  12 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
  13 #include "content/browser/accessibility/browser_accessibility_win.h"
  14 #include "content/browser/renderer_host/legacy_render_widget_host_win.h"
  15 #include "content/common/accessibility_messages.h"
  16 #include "testing/gtest/include/gtest/gtest.h"
  17 #include "ui/base/win/atl_module.h"
  18
  19 namespace content {
  20 namespace {
  21
  22
  23 // CountedBrowserAccessibility ------------------------------------------------
  24
  25 // Subclass of BrowserAccessibilityWin that counts the number of instances.
  26 class CountedBrowserAccessibility : public BrowserAccessibilityWin {
  27  public:
  28   CountedBrowserAccessibility();
  29   virtual ~CountedBrowserAccessibility();
  30
  31   static void reset() { num_instances_ = 0; }
  32   static int num_instances() { return num_instances_; }
  33
  34  private:
  35   static int num_instances_;
  36
  37   DISALLOW_COPY_AND_ASSIGN(CountedBrowserAccessibility);
  38 };
  39
  40 // static
  41 int CountedBrowserAccessibility::num_instances_ = 0;
  42
  43 CountedBrowserAccessibility::CountedBrowserAccessibility() {
  44   ++num_instances_;
  45 }
  46
  47 CountedBrowserAccessibility::~CountedBrowserAccessibility() {
  48   --num_instances_;
  49 }
  50
  51
  52 // CountedBrowserAccessibilityFactory -----------------------------------------
  53
  54 // Factory that creates a CountedBrowserAccessibility.
  55 class CountedBrowserAccessibilityFactory : public BrowserAccessibilityFactory {
  56  public:
  57   CountedBrowserAccessibilityFactory();
  58
  59  private:
  60   virtual ~CountedBrowserAccessibilityFactory();
  61
  62   virtual BrowserAccessibility* Create() OVERRIDE;
  63
  64   DISALLOW_COPY_AND_ASSIGN(CountedBrowserAccessibilityFactory);
  65 };
  66
  67 CountedBrowserAccessibilityFactory::CountedBrowserAccessibilityFactory() {
  68 }
  69
  70 CountedBrowserAccessibilityFactory::~CountedBrowserAccessibilityFactory() {
  71 }
  72
  73 BrowserAccessibility* CountedBrowserAccessibilityFactory::Create() {
  74   CComObject<CountedBrowserAccessibility>* instance;
  75   HRESULT hr = CComObject<CountedBrowserAccessibility>::CreateInstance(
  76       &instance);
  77   DCHECK(SUCCEEDED(hr));
  78   instance->AddRef();
  79   return instance;
  80 }
  81
  82 }  // namespace
  83
  84
  85 // BrowserAccessibilityTest ---------------------------------------------------
  86
  87 class BrowserAccessibilityTest : public testing::Test {
  88  public:
  89   BrowserAccessibilityTest();
  90   virtual ~BrowserAccessibilityTest();
  91
  92  private:
  93   virtual void SetUp() OVERRIDE;
  94
  95   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityTest);
  96 };
  97
  98 BrowserAccessibilityTest::BrowserAccessibilityTest() {
  99 }
 100
 101 BrowserAccessibilityTest::~BrowserAccessibilityTest() {
 102 }
 103
 104 void BrowserAccessibilityTest::SetUp() {
 105   ui::win::CreateATLModuleIfNeeded();
 106 }
 107
 108
 109 // Actual tests ---------------------------------------------------------------
 110
 111 // Test that BrowserAccessibilityManager correctly releases the tree of
 112 // BrowserAccessibility instances upon delete.
 113 TEST_F(BrowserAccessibilityTest, TestNoLeaks) {
 114   // Create ui::AXNodeData objects for a simple document tree,
 115   // representing the accessibility information used to initialize
 116   // BrowserAccessibilityManager.
 117   ui::AXNodeData button;
 118   button.id = 2;
 119   button.SetName("Button");
 120   button.role = ui::AX_ROLE_BUTTON;
 121   button.state = 0;
 122
 123   ui::AXNodeData checkbox;
 124   checkbox.id = 3;
 125   checkbox.SetName("Checkbox");
 126   checkbox.role = ui::AX_ROLE_CHECK_BOX;
 127   checkbox.state = 0;
 128
 129   ui::AXNodeData root;
 130   root.id = 1;
 131   root.SetName("Document");
 132   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 133   root.state = 0;
 134   root.child_ids.push_back(2);
 135   root.child_ids.push_back(3);
 136
 137   // Construct a BrowserAccessibilityManager with this
 138   // ui::AXNodeData tree and a factory for an instance-counting
 139   // BrowserAccessibility, and ensure that exactly 3 instances were
 140   // created. Note that the manager takes ownership of the factory.
 141   CountedBrowserAccessibility::reset();
 142   scoped_ptr<BrowserAccessibilityManager> manager(
 143       BrowserAccessibilityManager::Create(
 144           root, NULL, new CountedBrowserAccessibilityFactory()));
 145   manager->UpdateNodesForTesting(button, checkbox);
 146   ASSERT_EQ(3, CountedBrowserAccessibility::num_instances());
 147
 148   // Delete the manager and test that all 3 instances are deleted.
 149   manager.reset();
 150   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 151
 152   // Construct a manager again, and this time use the IAccessible interface
 153   // to get new references to two of the three nodes in the tree.
 154   manager.reset(BrowserAccessibilityManager::Create(
 155       root, NULL, new CountedBrowserAccessibilityFactory()));
 156   manager->UpdateNodesForTesting(button, checkbox);
 157   ASSERT_EQ(3, CountedBrowserAccessibility::num_instances());
 158   IAccessible* root_accessible =
 159       manager->GetRoot()->ToBrowserAccessibilityWin();
 160   IDispatch* root_iaccessible = NULL;
 161   IDispatch* child1_iaccessible = NULL;
 162   base::win::ScopedVariant childid_self(CHILDID_SELF);
 163   HRESULT hr = root_accessible->get_accChild(childid_self, &root_iaccessible);
 164   ASSERT_EQ(S_OK, hr);
 165   base::win::ScopedVariant one(1);
 166   hr = root_accessible->get_accChild(one, &child1_iaccessible);
 167   ASSERT_EQ(S_OK, hr);
 168
 169   // Now delete the manager, and only one of the three nodes in the tree
 170   // should be released.
 171   manager.reset();
 172   ASSERT_EQ(2, CountedBrowserAccessibility::num_instances());
 173
 174   // Release each of our references and make sure that each one results in
 175   // the instance being deleted as its reference count hits zero.
 176   root_iaccessible->Release();
 177   ASSERT_EQ(1, CountedBrowserAccessibility::num_instances());
 178   child1_iaccessible->Release();
 179   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 180 }
 181
 182 TEST_F(BrowserAccessibilityTest, TestChildrenChange) {
 183   // Create ui::AXNodeData objects for a simple document tree,
 184   // representing the accessibility information used to initialize
 185   // BrowserAccessibilityManager.
 186   ui::AXNodeData text;
 187   text.id = 2;
 188   text.role = ui::AX_ROLE_STATIC_TEXT;
 189   text.SetName("old text");
 190   text.state = 0;
 191
 192   ui::AXNodeData root;
 193   root.id = 1;
 194   root.SetName("Document");
 195   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 196   root.state = 0;
 197   root.child_ids.push_back(2);
 198
 199   // Construct a BrowserAccessibilityManager with this
 200   // ui::AXNodeData tree and a factory for an instance-counting
 201   // BrowserAccessibility.
 202   CountedBrowserAccessibility::reset();
 203   scoped_ptr<BrowserAccessibilityManager> manager(
 204       BrowserAccessibilityManager::Create(
 205           root, NULL, new CountedBrowserAccessibilityFactory()));
 206   manager->UpdateNodesForTesting(text);
 207
 208   // Query for the text IAccessible and verify that it returns "old text" as its
 209   // value.
 210   base::win::ScopedVariant one(1);
 211   base::win::ScopedComPtr<IDispatch> text_dispatch;
 212   HRESULT hr = manager->GetRoot()->ToBrowserAccessibilityWin()->get_accChild(
 213       one, text_dispatch.Receive());
 214   ASSERT_EQ(S_OK, hr);
 215
 216   base::win::ScopedComPtr<IAccessible> text_accessible;
 217   hr = text_dispatch.QueryInterface(text_accessible.Receive());
 218   ASSERT_EQ(S_OK, hr);
 219
 220   base::win::ScopedVariant childid_self(CHILDID_SELF);
 221   base::win::ScopedBstr name;
 222   hr = text_accessible->get_accName(childid_self, name.Receive());
 223   ASSERT_EQ(S_OK, hr);
 224   EXPECT_EQ(L"old text", base::string16(name));
 225   name.Reset();
 226
 227   text_dispatch.Release();
 228   text_accessible.Release();
 229
 230   // Notify the BrowserAccessibilityManager that the text child has changed.
 231   ui::AXNodeData text2;
 232   text2.id = 2;
 233   text2.role = ui::AX_ROLE_STATIC_TEXT;
 234   text2.SetName("new text");
 235   text2.SetName("old text");
 236   AccessibilityHostMsg_EventParams param;
 237   param.event_type = ui::AX_EVENT_CHILDREN_CHANGED;
 238   param.nodes.push_back(text2);
 239   param.id = text2.id;
 240   std::vector<AccessibilityHostMsg_EventParams> events;
 241   events.push_back(param);
 242   manager->OnAccessibilityEvents(events);
 243
 244   // Query for the text IAccessible and verify that it now returns "new text"
 245   // as its value.
 246   hr = manager->GetRoot()->ToBrowserAccessibilityWin()->get_accChild(
 247       one, text_dispatch.Receive());
 248   ASSERT_EQ(S_OK, hr);
 249
 250   hr = text_dispatch.QueryInterface(text_accessible.Receive());
 251   ASSERT_EQ(S_OK, hr);
 252
 253   hr = text_accessible->get_accName(childid_self, name.Receive());
 254   ASSERT_EQ(S_OK, hr);
 255   EXPECT_EQ(L"new text", base::string16(name));
 256
 257   text_dispatch.Release();
 258   text_accessible.Release();
 259
 260   // Delete the manager and test that all BrowserAccessibility instances are
 261   // deleted.
 262   manager.reset();
 263   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 264 }
 265
 266 TEST_F(BrowserAccessibilityTest, TestChildrenChangeNoLeaks) {
 267   // Create ui::AXNodeData objects for a simple document tree,
 268   // representing the accessibility information used to initialize
 269   // BrowserAccessibilityManager.
 270   ui::AXNodeData div;
 271   div.id = 2;
 272   div.role = ui::AX_ROLE_GROUP;
 273   div.state = 0;
 274
 275   ui::AXNodeData text3;
 276   text3.id = 3;
 277   text3.role = ui::AX_ROLE_STATIC_TEXT;
 278   text3.state = 0;
 279
 280   ui::AXNodeData text4;
 281   text4.id = 4;
 282   text4.role = ui::AX_ROLE_STATIC_TEXT;
 283   text4.state = 0;
 284
 285   div.child_ids.push_back(3);
 286   div.child_ids.push_back(4);
 287
 288   ui::AXNodeData root;
 289   root.id = 1;
 290   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 291   root.state = 0;
 292   root.child_ids.push_back(2);
 293
 294   // Construct a BrowserAccessibilityManager with this
 295   // ui::AXNodeData tree and a factory for an instance-counting
 296   // BrowserAccessibility and ensure that exactly 4 instances were
 297   // created. Note that the manager takes ownership of the factory.
 298   CountedBrowserAccessibility::reset();
 299   scoped_ptr<BrowserAccessibilityManager> manager(
 300       BrowserAccessibilityManager::Create(
 301           root, NULL, new CountedBrowserAccessibilityFactory()));
 302   manager->UpdateNodesForTesting(div, text3, text4);
 303   ASSERT_EQ(4, CountedBrowserAccessibility::num_instances());
 304
 305   // Notify the BrowserAccessibilityManager that the div node and its children
 306   // were removed and ensure that only one BrowserAccessibility instance exists.
 307   root.child_ids.clear();
 308   AccessibilityHostMsg_EventParams param;
 309   param.event_type = ui::AX_EVENT_CHILDREN_CHANGED;
 310   param.nodes.push_back(root);
 311   param.id = root.id;
 312   std::vector<AccessibilityHostMsg_EventParams> events;
 313   events.push_back(param);
 314   manager->OnAccessibilityEvents(events);
 315   ASSERT_EQ(1, CountedBrowserAccessibility::num_instances());
 316
 317   // Delete the manager and test that all BrowserAccessibility instances are
 318   // deleted.
 319   manager.reset();
 320   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 321 }
 322
 323 TEST_F(BrowserAccessibilityTest, TestTextBoundaries) {
 324   std::string text1_value = "One two three.\nFour five six.";
 325
 326   ui::AXNodeData text1;
 327   text1.id = 11;
 328   text1.role = ui::AX_ROLE_TEXT_FIELD;
 329   text1.state = 0;
 330   text1.AddStringAttribute(ui::AX_ATTR_VALUE, text1_value);
 331   std::vector<int32> line_breaks;
 332   line_breaks.push_back(15);
 333   text1.AddIntListAttribute(
 334       ui::AX_ATTR_LINE_BREAKS, line_breaks);
 335
 336   ui::AXNodeData root;
 337   root.id = 1;
 338   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 339   root.state = 0;
 340   root.child_ids.push_back(11);
 341
 342   CountedBrowserAccessibility::reset();
 343   scoped_ptr<BrowserAccessibilityManager> manager(
 344       BrowserAccessibilityManager::Create(
 345           root, NULL, new CountedBrowserAccessibilityFactory()));
 346   manager->UpdateNodesForTesting(text1);
 347   ASSERT_EQ(2, CountedBrowserAccessibility::num_instances());
 348
 349   BrowserAccessibilityWin* root_obj =
 350       manager->GetRoot()->ToBrowserAccessibilityWin();
 351   BrowserAccessibilityWin* text1_obj =
 352       root_obj->PlatformGetChild(0)->ToBrowserAccessibilityWin();
 353
 354   long text1_len;
 355   ASSERT_EQ(S_OK, text1_obj->get_nCharacters(&text1_len));
 356
 357   base::win::ScopedBstr text;
 358   ASSERT_EQ(S_OK, text1_obj->get_text(0, text1_len, text.Receive()));
 359   ASSERT_EQ(text1_value, base::UTF16ToUTF8(base::string16(text)));
 360   text.Reset();
 361
 362   ASSERT_EQ(S_OK, text1_obj->get_text(0, 4, text.Receive()));
 363   ASSERT_STREQ(L"One ", text);
 364   text.Reset();
 365
 366   long start;
 367   long end;
 368   ASSERT_EQ(S_OK, text1_obj->get_textAtOffset(
 369       1, IA2_TEXT_BOUNDARY_CHAR, &start, &end, text.Receive()));
 370   ASSERT_EQ(1, start);
 371   ASSERT_EQ(2, end);
 372   ASSERT_STREQ(L"n", text);
 373   text.Reset();
 374
 375   ASSERT_EQ(S_FALSE, text1_obj->get_textAtOffset(
 376       text1_len, IA2_TEXT_BOUNDARY_CHAR, &start, &end, text.Receive()));
 377   ASSERT_EQ(text1_len, start);
 378   ASSERT_EQ(text1_len, end);
 379   text.Reset();
 380
 381   ASSERT_EQ(S_OK, text1_obj->get_textAtOffset(
 382       1, IA2_TEXT_BOUNDARY_WORD, &start, &end, text.Receive()));
 383   ASSERT_EQ(0, start);
 384   ASSERT_EQ(3, end);
 385   ASSERT_STREQ(L"One", text);
 386   text.Reset();
 387
 388   ASSERT_EQ(S_OK, text1_obj->get_textAtOffset(
 389       6, IA2_TEXT_BOUNDARY_WORD, &start, &end, text.Receive()));
 390   ASSERT_EQ(4, start);
 391   ASSERT_EQ(7, end);
 392   ASSERT_STREQ(L"two", text);
 393   text.Reset();
 394
 395   ASSERT_EQ(S_OK, text1_obj->get_textAtOffset(
 396       text1_len, IA2_TEXT_BOUNDARY_WORD, &start, &end, text.Receive()));
 397   ASSERT_EQ(25, start);
 398   ASSERT_EQ(29, end);
 399   ASSERT_STREQ(L"six.", text);
 400   text.Reset();
 401
 402   ASSERT_EQ(S_OK, text1_obj->get_textAtOffset(
 403       1, IA2_TEXT_BOUNDARY_LINE, &start, &end, text.Receive()));
 404   ASSERT_EQ(0, start);
 405   ASSERT_EQ(15, end);
 406   ASSERT_STREQ(L"One two three.\n", text);
 407   text.Reset();
 408
 409   ASSERT_EQ(S_OK,
 410             text1_obj->get_text(0, IA2_TEXT_OFFSET_LENGTH, text.Receive()));
 411   ASSERT_STREQ(L"One two three.\nFour five six.", text);
 412
 413   // Delete the manager and test that all BrowserAccessibility instances are
 414   // deleted.
 415   manager.reset();
 416   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 417 }
 418
 419 TEST_F(BrowserAccessibilityTest, TestSimpleHypertext) {
 420   const std::string text1_name = "One two three.";
 421   const std::string text2_name = " Four five six.";
 422
 423   ui::AXNodeData text1;
 424   text1.id = 11;
 425   text1.role = ui::AX_ROLE_STATIC_TEXT;
 426   text1.state = 1 << ui::AX_STATE_READ_ONLY;
 427   text1.SetName(text1_name);
 428
 429   ui::AXNodeData text2;
 430   text2.id = 12;
 431   text2.role = ui::AX_ROLE_STATIC_TEXT;
 432   text2.state = 1 << ui::AX_STATE_READ_ONLY;
 433   text2.SetName(text2_name);
 434
 435   ui::AXNodeData root;
 436   root.id = 1;
 437   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 438   root.state = 1 << ui::AX_STATE_READ_ONLY;
 439   root.child_ids.push_back(11);
 440   root.child_ids.push_back(12);
 441
 442   CountedBrowserAccessibility::reset();
 443   scoped_ptr<BrowserAccessibilityManager> manager(
 444       BrowserAccessibilityManager::Create(
 445           root, NULL, new CountedBrowserAccessibilityFactory()));
 446   manager->UpdateNodesForTesting(root, text1, text2);
 447   ASSERT_EQ(3, CountedBrowserAccessibility::num_instances());
 448
 449   BrowserAccessibilityWin* root_obj =
 450       manager->GetRoot()->ToBrowserAccessibilityWin();
 451
 452   long text_len;
 453   ASSERT_EQ(S_OK, root_obj->get_nCharacters(&text_len));
 454
 455   base::win::ScopedBstr text;
 456   ASSERT_EQ(S_OK, root_obj->get_text(0, text_len, text.Receive()));
 457   EXPECT_EQ(text1_name + text2_name, base::UTF16ToUTF8(base::string16(text)));
 458
 459   long hyperlink_count;
 460   ASSERT_EQ(S_OK, root_obj->get_nHyperlinks(&hyperlink_count));
 461   EXPECT_EQ(0, hyperlink_count);
 462
 463   base::win::ScopedComPtr<IAccessibleHyperlink> hyperlink;
 464   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(-1, hyperlink.Receive()));
 465   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(0, hyperlink.Receive()));
 466   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(28, hyperlink.Receive()));
 467   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(29, hyperlink.Receive()));
 468
 469   long hyperlink_index;
 470   EXPECT_EQ(E_FAIL, root_obj->get_hyperlinkIndex(0, &hyperlink_index));
 471   EXPECT_EQ(-1, hyperlink_index);
 472   EXPECT_EQ(E_FAIL, root_obj->get_hyperlinkIndex(28, &hyperlink_index));
 473   EXPECT_EQ(-1, hyperlink_index);
 474   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlinkIndex(-1, &hyperlink_index));
 475   EXPECT_EQ(-1, hyperlink_index);
 476   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlinkIndex(29, &hyperlink_index));
 477   EXPECT_EQ(-1, hyperlink_index);
 478
 479   // Delete the manager and test that all BrowserAccessibility instances are
 480   // deleted.
 481   manager.reset();
 482   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 483 }
 484
 485 TEST_F(BrowserAccessibilityTest, TestComplexHypertext) {
 486   const std::string text1_name = "One two three.";
 487   const std::string text2_name = " Four five six.";
 488   const std::string button1_text_name = "red";
 489   const std::string link1_text_name = "blue";
 490
 491   ui::AXNodeData text1;
 492   text1.id = 11;
 493   text1.role = ui::AX_ROLE_STATIC_TEXT;
 494   text1.state = 1 << ui::AX_STATE_READ_ONLY;
 495   text1.SetName(text1_name);
 496
 497   ui::AXNodeData text2;
 498   text2.id = 12;
 499   text2.role = ui::AX_ROLE_STATIC_TEXT;
 500   text2.state = 1 << ui::AX_STATE_READ_ONLY;
 501   text2.SetName(text2_name);
 502
 503   ui::AXNodeData button1, button1_text;
 504   button1.id = 13;
 505   button1_text.id = 15;
 506   button1_text.SetName(button1_text_name);
 507   button1.role = ui::AX_ROLE_BUTTON;
 508   button1_text.role = ui::AX_ROLE_STATIC_TEXT;
 509   button1.state = 1 << ui::AX_STATE_READ_ONLY;
 510   button1_text.state = 1 << ui::AX_STATE_READ_ONLY;
 511   button1.child_ids.push_back(15);
 512
 513   ui::AXNodeData link1, link1_text;
 514   link1.id = 14;
 515   link1_text.id = 16;
 516   link1_text.SetName(link1_text_name);
 517   link1.role = ui::AX_ROLE_LINK;
 518   link1_text.role = ui::AX_ROLE_STATIC_TEXT;
 519   link1.state = 1 << ui::AX_STATE_READ_ONLY;
 520   link1_text.state = 1 << ui::AX_STATE_READ_ONLY;
 521   link1.child_ids.push_back(16);
 522
 523   ui::AXNodeData root;
 524   root.id = 1;
 525   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 526   root.state = 1 << ui::AX_STATE_READ_ONLY;
 527   root.child_ids.push_back(11);
 528   root.child_ids.push_back(13);
 529   root.child_ids.push_back(12);
 530   root.child_ids.push_back(14);
 531
 532   CountedBrowserAccessibility::reset();
 533   scoped_ptr<BrowserAccessibilityManager> manager(
 534       BrowserAccessibilityManager::Create(
 535           root, NULL, new CountedBrowserAccessibilityFactory()));
 536   manager->UpdateNodesForTesting(root,
 537                                  text1, button1, button1_text,
 538                                  text2, link1, link1_text);
 539
 540   ASSERT_EQ(7, CountedBrowserAccessibility::num_instances());
 541
 542   BrowserAccessibilityWin* root_obj =
 543       manager->GetRoot()->ToBrowserAccessibilityWin();
 544
 545   long text_len;
 546   ASSERT_EQ(S_OK, root_obj->get_nCharacters(&text_len));
 547
 548   base::win::ScopedBstr text;
 549   ASSERT_EQ(S_OK, root_obj->get_text(0, text_len, text.Receive()));
 550   const std::string embed = base::UTF16ToUTF8(
 551       BrowserAccessibilityWin::kEmbeddedCharacter);
 552   EXPECT_EQ(text1_name + embed + text2_name + embed,
 553             base::UTF16ToUTF8(base::string16(text)));
 554   text.Reset();
 555
 556   long hyperlink_count;
 557   ASSERT_EQ(S_OK, root_obj->get_nHyperlinks(&hyperlink_count));
 558   EXPECT_EQ(2, hyperlink_count);
 559
 560   base::win::ScopedComPtr<IAccessibleHyperlink> hyperlink;
 561   base::win::ScopedComPtr<IAccessibleText> hypertext;
 562   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(-1, hyperlink.Receive()));
 563   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(2, hyperlink.Receive()));
 564   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(28, hyperlink.Receive()));
 565
 566   EXPECT_EQ(S_OK, root_obj->get_hyperlink(0, hyperlink.Receive()));
 567   EXPECT_EQ(S_OK,
 568             hyperlink.QueryInterface<IAccessibleText>(hypertext.Receive()));
 569   EXPECT_EQ(S_OK, hypertext->get_text(0, 3, text.Receive()));
 570   EXPECT_STREQ(button1_text_name.c_str(),
 571                base::UTF16ToUTF8(base::string16(text)).c_str());
 572   text.Reset();
 573   hyperlink.Release();
 574   hypertext.Release();
 575
 576   EXPECT_EQ(S_OK, root_obj->get_hyperlink(1, hyperlink.Receive()));
 577   EXPECT_EQ(S_OK,
 578             hyperlink.QueryInterface<IAccessibleText>(hypertext.Receive()));
 579   EXPECT_EQ(S_OK, hypertext->get_text(0, 4, text.Receive()));
 580   EXPECT_STREQ(link1_text_name.c_str(),
 581                base::UTF16ToUTF8(base::string16(text)).c_str());
 582   text.Reset();
 583   hyperlink.Release();
 584   hypertext.Release();
 585
 586   long hyperlink_index;
 587   EXPECT_EQ(E_FAIL, root_obj->get_hyperlinkIndex(0, &hyperlink_index));
 588   EXPECT_EQ(-1, hyperlink_index);
 589   EXPECT_EQ(E_FAIL, root_obj->get_hyperlinkIndex(28, &hyperlink_index));
 590   EXPECT_EQ(-1, hyperlink_index);
 591   EXPECT_EQ(S_OK, root_obj->get_hyperlinkIndex(14, &hyperlink_index));
 592   EXPECT_EQ(0, hyperlink_index);
 593   EXPECT_EQ(S_OK, root_obj->get_hyperlinkIndex(30, &hyperlink_index));
 594   EXPECT_EQ(1, hyperlink_index);
 595
 596   // Delete the manager and test that all BrowserAccessibility instances are
 597   // deleted.
 598   manager.reset();
 599   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 600 }
 601
 602 TEST_F(BrowserAccessibilityTest, TestCreateEmptyDocument) {
 603   // Try creating an empty document with busy state. Readonly is
 604   // set automatically.
 605   CountedBrowserAccessibility::reset();
 606   const int32 busy_state = 1 << ui::AX_STATE_BUSY;
 607   const int32 readonly_state = 1 << ui::AX_STATE_READ_ONLY;
 608   const int32 enabled_state = 1 << blink::WebAXStateEnabled;
 609   scoped_ptr<content::LegacyRenderWidgetHostHWND> accessible_hwnd(
 610       content::LegacyRenderWidgetHostHWND::Create(GetDesktopWindow()));
 611   scoped_ptr<BrowserAccessibilityManager> manager(
 612       new BrowserAccessibilityManagerWin(
 613           accessible_hwnd.get(),
 614           NULL,
 615           BrowserAccessibilityManagerWin::GetEmptyDocument(),
 616           NULL,
 617           new CountedBrowserAccessibilityFactory()));
 618
 619   // Verify the root is as we expect by default.
 620   BrowserAccessibility* root = manager->GetRoot();
 621   EXPECT_EQ(0, root->renderer_id());
 622   EXPECT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, root->role());
 623   EXPECT_EQ(busy_state | readonly_state | enabled_state, root->state());
 624
 625   // Tree with a child textfield.
 626   ui::AXNodeData tree1_1;
 627   tree1_1.id = 1;
 628   tree1_1.role = ui::AX_ROLE_ROOT_WEB_AREA;
 629   tree1_1.child_ids.push_back(2);
 630
 631   ui::AXNodeData tree1_2;
 632   tree1_2.id = 2;
 633   tree1_2.role = ui::AX_ROLE_TEXT_FIELD;
 634
 635   // Process a load complete.
 636   std::vector<AccessibilityHostMsg_EventParams> params;
 637   params.push_back(AccessibilityHostMsg_EventParams());
 638   AccessibilityHostMsg_EventParams* msg = &params[0];
 639   msg->event_type = ui::AX_EVENT_LOAD_COMPLETE;
 640   msg->nodes.push_back(tree1_1);
 641   msg->nodes.push_back(tree1_2);
 642   msg->id = tree1_1.id;
 643   manager->OnAccessibilityEvents(params);
 644
 645   // Save for later comparison.
 646   BrowserAccessibility* acc1_2 = manager->GetFromRendererID(2);
 647
 648   // Verify the root has changed.
 649   EXPECT_NE(root, manager->GetRoot());
 650
 651   // And the proper child remains.
 652   EXPECT_EQ(ui::AX_ROLE_TEXT_FIELD, acc1_2->role());
 653   EXPECT_EQ(2, acc1_2->renderer_id());
 654
 655   // Tree with a child button.
 656   ui::AXNodeData tree2_1;
 657   tree2_1.id = 1;
 658   tree2_1.role = ui::AX_ROLE_ROOT_WEB_AREA;
 659   tree2_1.child_ids.push_back(3);
 660
 661   ui::AXNodeData tree2_2;
 662   tree2_2.id = 3;
 663   tree2_2.role = ui::AX_ROLE_BUTTON;
 664
 665   msg->nodes.clear();
 666   msg->nodes.push_back(tree2_1);
 667   msg->nodes.push_back(tree2_2);
 668   msg->id = tree2_1.id;
 669
 670   // Fire another load complete.
 671   manager->OnAccessibilityEvents(params);
 672
 673   BrowserAccessibility* acc2_2 = manager->GetFromRendererID(3);
 674
 675   // Verify the root has changed.
 676   EXPECT_NE(root, manager->GetRoot());
 677
 678   // And the new child exists.
 679   EXPECT_EQ(ui::AX_ROLE_BUTTON, acc2_2->role());
 680   EXPECT_EQ(3, acc2_2->renderer_id());
 681
 682   // Ensure we properly cleaned up.
 683   manager.reset();
 684   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 685 }
 686
 687 TEST(BrowserAccessibilityManagerWinTest, TestAccessibleHWND) {
 688   HWND desktop_hwnd = GetDesktopWindow();
 689   base::win::ScopedComPtr<IAccessible> desktop_hwnd_iaccessible;
 690   ASSERT_EQ(S_OK, AccessibleObjectFromWindow(
 691       desktop_hwnd, OBJID_CLIENT,
 692       IID_IAccessible,
 693       reinterpret_cast<void**>(desktop_hwnd_iaccessible.Receive())));
 694
 695   scoped_ptr<content::LegacyRenderWidgetHostHWND> accessible_hwnd(
 696       content::LegacyRenderWidgetHostHWND::Create(GetDesktopWindow()));
 697
 698   scoped_ptr<BrowserAccessibilityManagerWin> manager(
 699       new BrowserAccessibilityManagerWin(
 700           accessible_hwnd.get(),
 701           desktop_hwnd_iaccessible,
 702           BrowserAccessibilityManagerWin::GetEmptyDocument(),
 703           NULL));
 704   ASSERT_EQ(desktop_hwnd, manager->parent_hwnd());
 705
 706   // Enabling screen reader support and calling MaybeCallNotifyWinEvent
 707   // should trigger creating the AccessibleHWND, and we should now get a
 708   // new parent_hwnd with the right window class to fool older screen
 709   // readers.
 710   BrowserAccessibilityStateImpl::GetInstance()->OnScreenReaderDetected();
 711   manager->MaybeCallNotifyWinEvent(0, 0);
 712   HWND new_parent_hwnd = manager->parent_hwnd();
 713   ASSERT_NE(desktop_hwnd, new_parent_hwnd);
 714   WCHAR hwnd_class_name[256];
 715   ASSERT_NE(0, GetClassName(new_parent_hwnd, hwnd_class_name, 256));
 716   ASSERT_STREQ(L"Chrome_RenderWidgetHostHWND", hwnd_class_name);
 717
 718   // Destroy the hwnd explicitly; that should trigger clearing parent_hwnd().
 719   DestroyWindow(new_parent_hwnd);
 720   ASSERT_EQ(NULL, manager->parent_hwnd());
 721
 722   // Now create it again.
 723   accessible_hwnd = content::LegacyRenderWidgetHostHWND::Create(
 724       GetDesktopWindow());
 725   manager.reset(
 726       new BrowserAccessibilityManagerWin(
 727           accessible_hwnd.get(),
 728           desktop_hwnd_iaccessible,
 729           BrowserAccessibilityManagerWin::GetEmptyDocument(),
 730           NULL));
 731   manager->MaybeCallNotifyWinEvent(0, 0);
 732   new_parent_hwnd = manager->parent_hwnd();
 733   ASSERT_FALSE(NULL == new_parent_hwnd);
 734
 735   // This time, destroy the manager first, make sure the AccessibleHWND doesn't
 736   // crash on destruction (to be caught by SyzyASAN or other tools).
 737   manager.reset(NULL);
 738 }
 739
 740 }  // namespace content