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 "content/public/test/test_browser_thread_bundle.h"
  17 #include "testing/gtest/include/gtest/gtest.h"
  18 #include "ui/base/win/atl_module.h"
  19
  20 namespace content {
  21 namespace {
  22
  23
  24 // CountedBrowserAccessibility ------------------------------------------------
  25
  26 // Subclass of BrowserAccessibilityWin that counts the number of instances.
  27 class CountedBrowserAccessibility : public BrowserAccessibilityWin {
  28  public:
  29   CountedBrowserAccessibility();
  30   ~CountedBrowserAccessibility() override;
  31
  32   static void reset() { num_instances_ = 0; }
  33   static int num_instances() { return num_instances_; }
  34
  35  private:
  36   static int num_instances_;
  37
  38   DISALLOW_COPY_AND_ASSIGN(CountedBrowserAccessibility);
  39 };
  40
  41 // static
  42 int CountedBrowserAccessibility::num_instances_ = 0;
  43
  44 CountedBrowserAccessibility::CountedBrowserAccessibility() {
  45   ++num_instances_;
  46 }
  47
  48 CountedBrowserAccessibility::~CountedBrowserAccessibility() {
  49   --num_instances_;
  50 }
  51
  52
  53 // CountedBrowserAccessibilityFactory -----------------------------------------
  54
  55 // Factory that creates a CountedBrowserAccessibility.
  56 class CountedBrowserAccessibilityFactory : public BrowserAccessibilityFactory {
  57  public:
  58   CountedBrowserAccessibilityFactory();
  59
  60  private:
  61   ~CountedBrowserAccessibilityFactory() override;
  62
  63   BrowserAccessibility* Create() override;
  64
  65   DISALLOW_COPY_AND_ASSIGN(CountedBrowserAccessibilityFactory);
  66 };
  67
  68 CountedBrowserAccessibilityFactory::CountedBrowserAccessibilityFactory() {
  69 }
  70
  71 CountedBrowserAccessibilityFactory::~CountedBrowserAccessibilityFactory() {
  72 }
  73
  74 BrowserAccessibility* CountedBrowserAccessibilityFactory::Create() {
  75   CComObject<CountedBrowserAccessibility>* instance;
  76   HRESULT hr = CComObject<CountedBrowserAccessibility>::CreateInstance(
  77       &instance);
  78   DCHECK(SUCCEEDED(hr));
  79   instance->AddRef();
  80   return instance;
  81 }
  82
  83 }  // namespace
  84
  85
  86 // BrowserAccessibilityTest ---------------------------------------------------
  87
  88 class BrowserAccessibilityTest : public testing::Test {
  89  public:
  90   BrowserAccessibilityTest();
  91   ~BrowserAccessibilityTest() override;
  92
  93  private:
  94   void SetUp() override;
  95
  96   content::TestBrowserThreadBundle thread_bundle_;
  97
  98   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityTest);
  99 };
 100
 101 BrowserAccessibilityTest::BrowserAccessibilityTest() {
 102 }
 103
 104 BrowserAccessibilityTest::~BrowserAccessibilityTest() {
 105 }
 106
 107 void BrowserAccessibilityTest::SetUp() {
 108   ui::win::CreateATLModuleIfNeeded();
 109 }
 110
 111
 112 // Actual tests ---------------------------------------------------------------
 113
 114 // Test that BrowserAccessibilityManager correctly releases the tree of
 115 // BrowserAccessibility instances upon delete.
 116 TEST_F(BrowserAccessibilityTest, TestNoLeaks) {
 117   // Create ui::AXNodeData objects for a simple document tree,
 118   // representing the accessibility information used to initialize
 119   // BrowserAccessibilityManager.
 120   ui::AXNodeData button;
 121   button.id = 2;
 122   button.SetName("Button");
 123   button.role = ui::AX_ROLE_BUTTON;
 124   button.state = 0;
 125
 126   ui::AXNodeData checkbox;
 127   checkbox.id = 3;
 128   checkbox.SetName("Checkbox");
 129   checkbox.role = ui::AX_ROLE_CHECK_BOX;
 130   checkbox.state = 0;
 131
 132   ui::AXNodeData root;
 133   root.id = 1;
 134   root.SetName("Document");
 135   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 136   root.state = 0;
 137   root.child_ids.push_back(2);
 138   root.child_ids.push_back(3);
 139
 140   // Construct a BrowserAccessibilityManager with this
 141   // ui::AXNodeData tree and a factory for an instance-counting
 142   // BrowserAccessibility, and ensure that exactly 3 instances were
 143   // created. Note that the manager takes ownership of the factory.
 144   CountedBrowserAccessibility::reset();
 145   scoped_ptr<BrowserAccessibilityManager> manager(
 146       BrowserAccessibilityManager::Create(
 147           MakeAXTreeUpdate(root, button, checkbox),
 148           NULL, new CountedBrowserAccessibilityFactory()));
 149   ASSERT_EQ(3, CountedBrowserAccessibility::num_instances());
 150
 151   // Delete the manager and test that all 3 instances are deleted.
 152   manager.reset();
 153   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 154
 155   // Construct a manager again, and this time use the IAccessible interface
 156   // to get new references to two of the three nodes in the tree.
 157   manager.reset(BrowserAccessibilityManager::Create(
 158       MakeAXTreeUpdate(root, button, checkbox),
 159       NULL, new CountedBrowserAccessibilityFactory()));
 160   ASSERT_EQ(3, CountedBrowserAccessibility::num_instances());
 161   IAccessible* root_accessible =
 162       manager->GetRoot()->ToBrowserAccessibilityWin();
 163   IDispatch* root_iaccessible = NULL;
 164   IDispatch* child1_iaccessible = NULL;
 165   base::win::ScopedVariant childid_self(CHILDID_SELF);
 166   HRESULT hr = root_accessible->get_accChild(childid_self, &root_iaccessible);
 167   ASSERT_EQ(S_OK, hr);
 168   base::win::ScopedVariant one(1);
 169   hr = root_accessible->get_accChild(one, &child1_iaccessible);
 170   ASSERT_EQ(S_OK, hr);
 171
 172   // Now delete the manager, and only one of the three nodes in the tree
 173   // should be released.
 174   manager.reset();
 175   ASSERT_EQ(2, CountedBrowserAccessibility::num_instances());
 176
 177   // Release each of our references and make sure that each one results in
 178   // the instance being deleted as its reference count hits zero.
 179   root_iaccessible->Release();
 180   ASSERT_EQ(1, CountedBrowserAccessibility::num_instances());
 181   child1_iaccessible->Release();
 182   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 183 }
 184
 185 TEST_F(BrowserAccessibilityTest, TestChildrenChange) {
 186   // Create ui::AXNodeData objects for a simple document tree,
 187   // representing the accessibility information used to initialize
 188   // BrowserAccessibilityManager.
 189   ui::AXNodeData text;
 190   text.id = 2;
 191   text.role = ui::AX_ROLE_STATIC_TEXT;
 192   text.SetName("old text");
 193   text.state = 0;
 194
 195   ui::AXNodeData root;
 196   root.id = 1;
 197   root.SetName("Document");
 198   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 199   root.state = 0;
 200   root.child_ids.push_back(2);
 201
 202   // Construct a BrowserAccessibilityManager with this
 203   // ui::AXNodeData tree and a factory for an instance-counting
 204   // BrowserAccessibility.
 205   CountedBrowserAccessibility::reset();
 206   scoped_ptr<BrowserAccessibilityManager> manager(
 207       BrowserAccessibilityManager::Create(
 208           MakeAXTreeUpdate(root, text),
 209           NULL, new CountedBrowserAccessibilityFactory()));
 210
 211   // Query for the text IAccessible and verify that it returns "old text" as its
 212   // value.
 213   base::win::ScopedVariant one(1);
 214   base::win::ScopedComPtr<IDispatch> text_dispatch;
 215   HRESULT hr = manager->GetRoot()->ToBrowserAccessibilityWin()->get_accChild(
 216       one, text_dispatch.Receive());
 217   ASSERT_EQ(S_OK, hr);
 218
 219   base::win::ScopedComPtr<IAccessible> text_accessible;
 220   hr = text_dispatch.QueryInterface(text_accessible.Receive());
 221   ASSERT_EQ(S_OK, hr);
 222
 223   base::win::ScopedVariant childid_self(CHILDID_SELF);
 224   base::win::ScopedBstr name;
 225   hr = text_accessible->get_accName(childid_self, name.Receive());
 226   ASSERT_EQ(S_OK, hr);
 227   EXPECT_EQ(L"old text", base::string16(name));
 228   name.Reset();
 229
 230   text_dispatch.Release();
 231   text_accessible.Release();
 232
 233   // Notify the BrowserAccessibilityManager that the text child has changed.
 234   ui::AXNodeData text2;
 235   text2.id = 2;
 236   text2.role = ui::AX_ROLE_STATIC_TEXT;
 237   text2.SetName("new text");
 238   text2.SetName("old text");
 239   AccessibilityHostMsg_EventParams param;
 240   param.event_type = ui::AX_EVENT_CHILDREN_CHANGED;
 241   param.update.nodes.push_back(text2);
 242   param.id = text2.id;
 243   std::vector<AccessibilityHostMsg_EventParams> events;
 244   events.push_back(param);
 245   manager->OnAccessibilityEvents(events);
 246
 247   // Query for the text IAccessible and verify that it now returns "new text"
 248   // as its value.
 249   hr = manager->GetRoot()->ToBrowserAccessibilityWin()->get_accChild(
 250       one, text_dispatch.Receive());
 251   ASSERT_EQ(S_OK, hr);
 252
 253   hr = text_dispatch.QueryInterface(text_accessible.Receive());
 254   ASSERT_EQ(S_OK, hr);
 255
 256   hr = text_accessible->get_accName(childid_self, name.Receive());
 257   ASSERT_EQ(S_OK, hr);
 258   EXPECT_EQ(L"new text", base::string16(name));
 259
 260   text_dispatch.Release();
 261   text_accessible.Release();
 262
 263   // Delete the manager and test that all BrowserAccessibility instances are
 264   // deleted.
 265   manager.reset();
 266   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 267 }
 268
 269 TEST_F(BrowserAccessibilityTest, TestChildrenChangeNoLeaks) {
 270   // Create ui::AXNodeData objects for a simple document tree,
 271   // representing the accessibility information used to initialize
 272   // BrowserAccessibilityManager.
 273   ui::AXNodeData div;
 274   div.id = 2;
 275   div.role = ui::AX_ROLE_GROUP;
 276   div.state = 0;
 277
 278   ui::AXNodeData text3;
 279   text3.id = 3;
 280   text3.role = ui::AX_ROLE_STATIC_TEXT;
 281   text3.state = 0;
 282
 283   ui::AXNodeData text4;
 284   text4.id = 4;
 285   text4.role = ui::AX_ROLE_STATIC_TEXT;
 286   text4.state = 0;
 287
 288   div.child_ids.push_back(3);
 289   div.child_ids.push_back(4);
 290
 291   ui::AXNodeData root;
 292   root.id = 1;
 293   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 294   root.state = 0;
 295   root.child_ids.push_back(2);
 296
 297   // Construct a BrowserAccessibilityManager with this
 298   // ui::AXNodeData tree and a factory for an instance-counting
 299   // BrowserAccessibility and ensure that exactly 4 instances were
 300   // created. Note that the manager takes ownership of the factory.
 301   CountedBrowserAccessibility::reset();
 302   scoped_ptr<BrowserAccessibilityManager> manager(
 303       BrowserAccessibilityManager::Create(
 304           MakeAXTreeUpdate(root, div, text3, text4),
 305           NULL, new CountedBrowserAccessibilityFactory()));
 306   ASSERT_EQ(4, CountedBrowserAccessibility::num_instances());
 307
 308   // Notify the BrowserAccessibilityManager that the div node and its children
 309   // were removed and ensure that only one BrowserAccessibility instance exists.
 310   root.child_ids.clear();
 311   AccessibilityHostMsg_EventParams param;
 312   param.event_type = ui::AX_EVENT_CHILDREN_CHANGED;
 313   param.update.nodes.push_back(root);
 314   param.id = root.id;
 315   std::vector<AccessibilityHostMsg_EventParams> events;
 316   events.push_back(param);
 317   manager->OnAccessibilityEvents(events);
 318   ASSERT_EQ(1, CountedBrowserAccessibility::num_instances());
 319
 320   // Delete the manager and test that all BrowserAccessibility instances are
 321   // deleted.
 322   manager.reset();
 323   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 324 }
 325
 326 TEST_F(BrowserAccessibilityTest, TestTextBoundaries) {
 327   std::string line1 = "One two three.";
 328   std::string line2 = "Four five six.";
 329   std::string text_value = line1 + '\n' + line2;
 330
 331   ui::AXNodeData root;
 332   root.id = 1;
 333   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 334   root.child_ids.push_back(2);
 335
 336   ui::AXNodeData text_field;
 337   text_field.id = 2;
 338   text_field.role = ui::AX_ROLE_TEXT_FIELD;
 339   text_field.AddStringAttribute(ui::AX_ATTR_VALUE, text_value);
 340   std::vector<int32> line_start_offsets;
 341   line_start_offsets.push_back(15);
 342   text_field.AddIntListAttribute(
 343       ui::AX_ATTR_LINE_BREAKS, line_start_offsets);
 344   text_field.child_ids.push_back(3);
 345   text_field.child_ids.push_back(5);
 346   text_field.child_ids.push_back(6);
 347
 348   ui::AXNodeData static_text1;
 349   static_text1.id = 3;
 350   static_text1.role = ui::AX_ROLE_STATIC_TEXT;
 351   static_text1.AddStringAttribute(ui::AX_ATTR_VALUE, line1);
 352   static_text1.child_ids.push_back(4);
 353
 354   ui::AXNodeData inline_box1;
 355   inline_box1.id = 4;
 356   inline_box1.role = ui::AX_ROLE_INLINE_TEXT_BOX;
 357   inline_box1.AddStringAttribute(ui::AX_ATTR_VALUE, line1);
 358   std::vector<int32> word_start_offsets1;
 359   word_start_offsets1.push_back(0);
 360   word_start_offsets1.push_back(4);
 361   word_start_offsets1.push_back(8);
 362   inline_box1.AddIntListAttribute(
 363       ui::AX_ATTR_WORD_STARTS, word_start_offsets1);
 364
 365   ui::AXNodeData line_break;
 366   line_break.id = 5;
 367   line_break.role = ui::AX_ROLE_LINE_BREAK;
 368   line_break.AddStringAttribute(ui::AX_ATTR_VALUE, "\n");
 369
 370   ui::AXNodeData static_text2;
 371   static_text2.id = 6;
 372   static_text2.role = ui::AX_ROLE_STATIC_TEXT;
 373   static_text2.AddStringAttribute(ui::AX_ATTR_VALUE, line2);
 374   static_text2.child_ids.push_back(7);
 375
 376   ui::AXNodeData inline_box2;
 377   inline_box2.id = 7;
 378   inline_box2.role = ui::AX_ROLE_INLINE_TEXT_BOX;
 379   inline_box2.AddStringAttribute(ui::AX_ATTR_VALUE, line2);
 380   std::vector<int32> word_start_offsets2;
 381   word_start_offsets2.push_back(0);
 382   word_start_offsets2.push_back(5);
 383   word_start_offsets2.push_back(10);
 384   inline_box2.AddIntListAttribute(
 385       ui::AX_ATTR_WORD_STARTS, word_start_offsets2);
 386
 387   CountedBrowserAccessibility::reset();
 388   scoped_ptr<BrowserAccessibilityManager> manager(
 389       BrowserAccessibilityManager::Create(
 390           MakeAXTreeUpdate(root, text_field, static_text1, inline_box1,
 391           line_break, static_text2, inline_box2),
 392           nullptr, new CountedBrowserAccessibilityFactory()));
 393   ASSERT_EQ(7, CountedBrowserAccessibility::num_instances());
 394
 395   BrowserAccessibilityWin* root_obj =
 396       manager->GetRoot()->ToBrowserAccessibilityWin();
 397   ASSERT_NE(nullptr, root_obj);
 398   ASSERT_EQ(1, root_obj->PlatformChildCount());
 399
 400   BrowserAccessibilityWin* text_field_obj =
 401       root_obj->PlatformGetChild(0)->ToBrowserAccessibilityWin();
 402   ASSERT_NE(nullptr, text_field_obj);
 403
 404   long text_len;
 405   EXPECT_EQ(S_OK, text_field_obj->get_nCharacters(&text_len));
 406
 407   base::win::ScopedBstr text;
 408   EXPECT_EQ(S_OK, text_field_obj->get_text(0, text_len, text.Receive()));
 409   EXPECT_EQ(text_value, base::UTF16ToUTF8(base::string16(text)));
 410   text.Reset();
 411
 412   EXPECT_EQ(S_OK, text_field_obj->get_text(0, 4, text.Receive()));
 413   EXPECT_STREQ(L"One ", text);
 414   text.Reset();
 415
 416   long start;
 417   long end;
 418   EXPECT_EQ(S_OK, text_field_obj->get_textAtOffset(
 419       1, IA2_TEXT_BOUNDARY_CHAR, &start, &end, text.Receive()));
 420   EXPECT_EQ(1, start);
 421   EXPECT_EQ(2, end);
 422   EXPECT_STREQ(L"n", text);
 423   text.Reset();
 424
 425   EXPECT_EQ(S_FALSE, text_field_obj->get_textAtOffset(
 426       text_len, IA2_TEXT_BOUNDARY_CHAR, &start, &end, text.Receive()));
 427   EXPECT_EQ(0, start);
 428   EXPECT_EQ(0, end);
 429   EXPECT_EQ(nullptr, text);
 430   text.Reset();
 431
 432   EXPECT_EQ(S_FALSE, text_field_obj->get_textAtOffset(
 433       text_len, IA2_TEXT_BOUNDARY_WORD, &start, &end, text.Receive()));
 434   EXPECT_EQ(0, start);
 435   EXPECT_EQ(0, end);
 436   EXPECT_EQ(nullptr, text);
 437   text.Reset();
 438
 439   EXPECT_EQ(S_OK, text_field_obj->get_textAtOffset(
 440       1, IA2_TEXT_BOUNDARY_WORD, &start, &end, text.Receive()));
 441   EXPECT_EQ(0, start);
 442   EXPECT_EQ(4, end);
 443   EXPECT_STREQ(L"One ", text);
 444   text.Reset();
 445
 446   EXPECT_EQ(S_OK, text_field_obj->get_textAtOffset(
 447       6, IA2_TEXT_BOUNDARY_WORD, &start, &end, text.Receive()));
 448   EXPECT_EQ(4, start);
 449   EXPECT_EQ(8, end);
 450   EXPECT_STREQ(L"two ", text);
 451   text.Reset();
 452
 453   EXPECT_EQ(S_OK, text_field_obj->get_textAtOffset(
 454       text_len - 1, IA2_TEXT_BOUNDARY_WORD, &start, &end, text.Receive()));
 455   EXPECT_EQ(25, start);
 456   EXPECT_EQ(29, end);
 457   EXPECT_STREQ(L"six.", text);
 458   text.Reset();
 459
 460   EXPECT_EQ(S_OK, text_field_obj->get_textAtOffset(
 461       1, IA2_TEXT_BOUNDARY_LINE, &start, &end, text.Receive()));
 462   EXPECT_EQ(0, start);
 463   EXPECT_EQ(15, end);
 464   EXPECT_STREQ(L"One two three.\n", text);
 465   text.Reset();
 466
 467   EXPECT_EQ(S_OK, text_field_obj->get_textAtOffset(
 468       text_len, IA2_TEXT_BOUNDARY_LINE, &start, &end, text.Receive()));
 469   EXPECT_EQ(15, start);
 470   EXPECT_EQ(text_len, end);
 471   EXPECT_STREQ(L"Four five six.", text);
 472   text.Reset();
 473
 474   EXPECT_EQ(S_OK, text_field_obj->get_text(
 475       0, IA2_TEXT_OFFSET_LENGTH, text.Receive()));
 476   EXPECT_EQ(text_value, base::UTF16ToUTF8(base::string16(text)));
 477
 478   // Delete the manager and test that all BrowserAccessibility instances are
 479   // deleted.
 480   manager.reset();
 481   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 482 }
 483
 484 TEST_F(BrowserAccessibilityTest, TestSimpleHypertext) {
 485   const std::string text1_name = "One two three.";
 486   const std::string text2_name = " Four five six.";
 487
 488   ui::AXNodeData text1;
 489   text1.id = 11;
 490   text1.role = ui::AX_ROLE_STATIC_TEXT;
 491   text1.state = 1 << ui::AX_STATE_READ_ONLY;
 492   text1.SetName(text1_name);
 493
 494   ui::AXNodeData text2;
 495   text2.id = 12;
 496   text2.role = ui::AX_ROLE_STATIC_TEXT;
 497   text2.state = 1 << ui::AX_STATE_READ_ONLY;
 498   text2.SetName(text2_name);
 499
 500   ui::AXNodeData root;
 501   root.id = 1;
 502   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 503   root.state = 1 << ui::AX_STATE_READ_ONLY;
 504   root.child_ids.push_back(11);
 505   root.child_ids.push_back(12);
 506
 507   CountedBrowserAccessibility::reset();
 508   scoped_ptr<BrowserAccessibilityManager> manager(
 509       BrowserAccessibilityManager::Create(
 510           MakeAXTreeUpdate(root, text1, text2),
 511           NULL, new CountedBrowserAccessibilityFactory()));
 512   ASSERT_EQ(3, CountedBrowserAccessibility::num_instances());
 513
 514   BrowserAccessibilityWin* root_obj =
 515       manager->GetRoot()->ToBrowserAccessibilityWin();
 516
 517   long text_len;
 518   ASSERT_EQ(S_OK, root_obj->get_nCharacters(&text_len));
 519
 520   base::win::ScopedBstr text;
 521   ASSERT_EQ(S_OK, root_obj->get_text(0, text_len, text.Receive()));
 522   EXPECT_EQ(text1_name + text2_name, base::UTF16ToUTF8(base::string16(text)));
 523
 524   long hyperlink_count;
 525   ASSERT_EQ(S_OK, root_obj->get_nHyperlinks(&hyperlink_count));
 526   EXPECT_EQ(0, hyperlink_count);
 527
 528   base::win::ScopedComPtr<IAccessibleHyperlink> hyperlink;
 529   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(-1, hyperlink.Receive()));
 530   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(0, hyperlink.Receive()));
 531   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(28, hyperlink.Receive()));
 532   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(29, hyperlink.Receive()));
 533
 534   long hyperlink_index;
 535   EXPECT_EQ(E_FAIL, root_obj->get_hyperlinkIndex(0, &hyperlink_index));
 536   EXPECT_EQ(-1, hyperlink_index);
 537   EXPECT_EQ(E_FAIL, root_obj->get_hyperlinkIndex(28, &hyperlink_index));
 538   EXPECT_EQ(-1, hyperlink_index);
 539   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlinkIndex(-1, &hyperlink_index));
 540   EXPECT_EQ(-1, hyperlink_index);
 541   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlinkIndex(29, &hyperlink_index));
 542   EXPECT_EQ(-1, hyperlink_index);
 543
 544   // Delete the manager and test that all BrowserAccessibility instances are
 545   // deleted.
 546   manager.reset();
 547   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 548 }
 549
 550 TEST_F(BrowserAccessibilityTest, TestComplexHypertext) {
 551   const std::string text1_name = "One two three.";
 552   const std::string text2_name = " Four five six.";
 553   const std::string button1_text_name = "red";
 554   const std::string link1_text_name = "blue";
 555
 556   ui::AXNodeData text1;
 557   text1.id = 11;
 558   text1.role = ui::AX_ROLE_STATIC_TEXT;
 559   text1.state = 1 << ui::AX_STATE_READ_ONLY;
 560   text1.SetName(text1_name);
 561
 562   ui::AXNodeData text2;
 563   text2.id = 12;
 564   text2.role = ui::AX_ROLE_STATIC_TEXT;
 565   text2.state = 1 << ui::AX_STATE_READ_ONLY;
 566   text2.SetName(text2_name);
 567
 568   ui::AXNodeData button1, button1_text;
 569   button1.id = 13;
 570   button1_text.id = 15;
 571   button1_text.SetName(button1_text_name);
 572   button1.role = ui::AX_ROLE_BUTTON;
 573   button1_text.role = ui::AX_ROLE_STATIC_TEXT;
 574   button1.state = 1 << ui::AX_STATE_READ_ONLY;
 575   button1_text.state = 1 << ui::AX_STATE_READ_ONLY;
 576   button1.child_ids.push_back(15);
 577
 578   ui::AXNodeData link1, link1_text;
 579   link1.id = 14;
 580   link1_text.id = 16;
 581   link1_text.SetName(link1_text_name);
 582   link1.role = ui::AX_ROLE_LINK;
 583   link1_text.role = ui::AX_ROLE_STATIC_TEXT;
 584   link1.state = 1 << ui::AX_STATE_READ_ONLY;
 585   link1_text.state = 1 << ui::AX_STATE_READ_ONLY;
 586   link1.child_ids.push_back(16);
 587
 588   ui::AXNodeData root;
 589   root.id = 1;
 590   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 591   root.state = 1 << ui::AX_STATE_READ_ONLY;
 592   root.child_ids.push_back(11);
 593   root.child_ids.push_back(13);
 594   root.child_ids.push_back(12);
 595   root.child_ids.push_back(14);
 596
 597   CountedBrowserAccessibility::reset();
 598   scoped_ptr<BrowserAccessibilityManager> manager(
 599       BrowserAccessibilityManager::Create(
 600           MakeAXTreeUpdate(root,
 601                            text1, button1, button1_text,
 602                            text2, link1, link1_text),
 603           NULL, new CountedBrowserAccessibilityFactory()));
 604   ASSERT_EQ(7, CountedBrowserAccessibility::num_instances());
 605
 606   BrowserAccessibilityWin* root_obj =
 607       manager->GetRoot()->ToBrowserAccessibilityWin();
 608
 609   long text_len;
 610   ASSERT_EQ(S_OK, root_obj->get_nCharacters(&text_len));
 611
 612   base::win::ScopedBstr text;
 613   ASSERT_EQ(S_OK, root_obj->get_text(0, text_len, text.Receive()));
 614   const std::string embed = base::UTF16ToUTF8(
 615       base::string16(1, BrowserAccessibilityWin::kEmbeddedCharacter));
 616   EXPECT_EQ(text1_name + embed + text2_name + embed,
 617             base::UTF16ToUTF8(base::string16(text)));
 618   text.Reset();
 619
 620   long hyperlink_count;
 621   ASSERT_EQ(S_OK, root_obj->get_nHyperlinks(&hyperlink_count));
 622   EXPECT_EQ(2, hyperlink_count);
 623
 624   base::win::ScopedComPtr<IAccessibleHyperlink> hyperlink;
 625   base::win::ScopedComPtr<IAccessibleText> hypertext;
 626   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(-1, hyperlink.Receive()));
 627   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(2, hyperlink.Receive()));
 628   EXPECT_EQ(E_INVALIDARG, root_obj->get_hyperlink(28, hyperlink.Receive()));
 629
 630   EXPECT_EQ(S_OK, root_obj->get_hyperlink(0, hyperlink.Receive()));
 631   EXPECT_EQ(S_OK,
 632             hyperlink.QueryInterface<IAccessibleText>(hypertext.Receive()));
 633   EXPECT_EQ(S_OK, hypertext->get_text(0, 3, text.Receive()));
 634   EXPECT_STREQ(button1_text_name.c_str(),
 635                base::UTF16ToUTF8(base::string16(text)).c_str());
 636   text.Reset();
 637   hyperlink.Release();
 638   hypertext.Release();
 639
 640   EXPECT_EQ(S_OK, root_obj->get_hyperlink(1, hyperlink.Receive()));
 641   EXPECT_EQ(S_OK,
 642             hyperlink.QueryInterface<IAccessibleText>(hypertext.Receive()));
 643   EXPECT_EQ(S_OK, hypertext->get_text(0, 4, text.Receive()));
 644   EXPECT_STREQ(link1_text_name.c_str(),
 645                base::UTF16ToUTF8(base::string16(text)).c_str());
 646   text.Reset();
 647   hyperlink.Release();
 648   hypertext.Release();
 649
 650   long hyperlink_index;
 651   EXPECT_EQ(E_FAIL, root_obj->get_hyperlinkIndex(0, &hyperlink_index));
 652   EXPECT_EQ(-1, hyperlink_index);
 653   EXPECT_EQ(E_FAIL, root_obj->get_hyperlinkIndex(28, &hyperlink_index));
 654   EXPECT_EQ(-1, hyperlink_index);
 655   EXPECT_EQ(S_OK, root_obj->get_hyperlinkIndex(14, &hyperlink_index));
 656   EXPECT_EQ(0, hyperlink_index);
 657   EXPECT_EQ(S_OK, root_obj->get_hyperlinkIndex(30, &hyperlink_index));
 658   EXPECT_EQ(1, hyperlink_index);
 659
 660   // Delete the manager and test that all BrowserAccessibility instances are
 661   // deleted.
 662   manager.reset();
 663   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 664 }
 665
 666 TEST_F(BrowserAccessibilityTest, TestCreateEmptyDocument) {
 667   // Try creating an empty document with busy state. Readonly is
 668   // set automatically.
 669   CountedBrowserAccessibility::reset();
 670   const int32 busy_state = 1 << ui::AX_STATE_BUSY;
 671   const int32 readonly_state = 1 << ui::AX_STATE_READ_ONLY;
 672   const int32 enabled_state = 1 << ui::AX_STATE_ENABLED;
 673   scoped_ptr<BrowserAccessibilityManager> manager(
 674       new BrowserAccessibilityManagerWin(
 675           BrowserAccessibilityManagerWin::GetEmptyDocument(),
 676           NULL,
 677           new CountedBrowserAccessibilityFactory()));
 678
 679   // Verify the root is as we expect by default.
 680   BrowserAccessibility* root = manager->GetRoot();
 681   EXPECT_EQ(0, root->GetId());
 682   EXPECT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, root->GetRole());
 683   EXPECT_EQ(busy_state | readonly_state | enabled_state, root->GetState());
 684
 685   // Tree with a child textfield.
 686   ui::AXNodeData tree1_1;
 687   tree1_1.id = 1;
 688   tree1_1.role = ui::AX_ROLE_ROOT_WEB_AREA;
 689   tree1_1.child_ids.push_back(2);
 690
 691   ui::AXNodeData tree1_2;
 692   tree1_2.id = 2;
 693   tree1_2.role = ui::AX_ROLE_TEXT_FIELD;
 694
 695   // Process a load complete.
 696   std::vector<AccessibilityHostMsg_EventParams> params;
 697   params.push_back(AccessibilityHostMsg_EventParams());
 698   AccessibilityHostMsg_EventParams* msg = &params[0];
 699   msg->event_type = ui::AX_EVENT_LOAD_COMPLETE;
 700   msg->update.nodes.push_back(tree1_1);
 701   msg->update.nodes.push_back(tree1_2);
 702   msg->id = tree1_1.id;
 703   manager->OnAccessibilityEvents(params);
 704
 705   // Save for later comparison.
 706   BrowserAccessibility* acc1_2 = manager->GetFromID(2);
 707
 708   // Verify the root has changed.
 709   EXPECT_NE(root, manager->GetRoot());
 710
 711   // And the proper child remains.
 712   EXPECT_EQ(ui::AX_ROLE_TEXT_FIELD, acc1_2->GetRole());
 713   EXPECT_EQ(2, acc1_2->GetId());
 714
 715   // Tree with a child button.
 716   ui::AXNodeData tree2_1;
 717   tree2_1.id = 1;
 718   tree2_1.role = ui::AX_ROLE_ROOT_WEB_AREA;
 719   tree2_1.child_ids.push_back(3);
 720
 721   ui::AXNodeData tree2_2;
 722   tree2_2.id = 3;
 723   tree2_2.role = ui::AX_ROLE_BUTTON;
 724
 725   msg->update.nodes.clear();
 726   msg->update.nodes.push_back(tree2_1);
 727   msg->update.nodes.push_back(tree2_2);
 728   msg->id = tree2_1.id;
 729
 730   // Fire another load complete.
 731   manager->OnAccessibilityEvents(params);
 732
 733   BrowserAccessibility* acc2_2 = manager->GetFromID(3);
 734
 735   // Verify the root has changed.
 736   EXPECT_NE(root, manager->GetRoot());
 737
 738   // And the new child exists.
 739   EXPECT_EQ(ui::AX_ROLE_BUTTON, acc2_2->GetRole());
 740   EXPECT_EQ(3, acc2_2->GetId());
 741
 742   // Ensure we properly cleaned up.
 743   manager.reset();
 744   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 745 }
 746
 747 // This is a regression test for a bug where the initial empty document
 748 // loaded by a BrowserAccessibilityManagerWin couldn't be looked up by
 749 // its UniqueIDWin, because the AX Tree was loaded in
 750 // BrowserAccessibilityManager code before BrowserAccessibilityManagerWin
 751 // was initialized.
 752 TEST_F(BrowserAccessibilityTest, EmptyDocHasUniqueIdWin) {
 753   scoped_ptr<BrowserAccessibilityManagerWin> manager(
 754       new BrowserAccessibilityManagerWin(
 755           BrowserAccessibilityManagerWin::GetEmptyDocument(),
 756           NULL,
 757           new CountedBrowserAccessibilityFactory()));
 758
 759   // Verify the root is as we expect by default.
 760   BrowserAccessibility* root = manager->GetRoot();
 761   EXPECT_EQ(0, root->GetId());
 762   EXPECT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, root->GetRole());
 763   EXPECT_EQ(1 << ui::AX_STATE_BUSY |
 764             1 << ui::AX_STATE_READ_ONLY |
 765             1 << ui::AX_STATE_ENABLED,
 766             root->GetState());
 767
 768   LONG unique_id_win = root->ToBrowserAccessibilityWin()->unique_id_win();
 769   ASSERT_EQ(root, manager->GetFromUniqueIdWin(unique_id_win));
 770 }
 771
 772 TEST_F(BrowserAccessibilityTest, TestIA2Attributes) {
 773   ui::AXNodeData checkbox;
 774   checkbox.id = 2;
 775   checkbox.SetName("Checkbox");
 776   checkbox.role = ui::AX_ROLE_CHECK_BOX;
 777   checkbox.state = 1 << ui::AX_STATE_CHECKED;
 778
 779   ui::AXNodeData root;
 780   root.id = 1;
 781   root.SetName("Document");
 782   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 783   root.state = (1 << ui::AX_STATE_READ_ONLY) | (1 << ui::AX_STATE_FOCUSABLE);
 784   root.child_ids.push_back(2);
 785
 786   CountedBrowserAccessibility::reset();
 787   scoped_ptr<BrowserAccessibilityManager> manager(
 788       BrowserAccessibilityManager::Create(
 789           MakeAXTreeUpdate(root, checkbox),
 790           nullptr, new CountedBrowserAccessibilityFactory()));
 791   ASSERT_EQ(2, CountedBrowserAccessibility::num_instances());
 792
 793   ASSERT_NE(nullptr, manager->GetRoot());
 794   BrowserAccessibilityWin* root_accessible =
 795       manager->GetRoot()->ToBrowserAccessibilityWin();
 796       ASSERT_NE(nullptr, root_accessible);
 797   ASSERT_EQ(1, root_accessible->PlatformChildCount());
 798   BrowserAccessibilityWin* checkbox_accessible =
 799       root_accessible->PlatformGetChild(0)->ToBrowserAccessibilityWin();
 800   ASSERT_NE(nullptr, checkbox_accessible);
 801
 802   base::win::ScopedBstr attributes;
 803   HRESULT hr = checkbox_accessible->get_attributes(attributes.Receive());
 804   EXPECT_EQ(S_OK, hr);
 805   EXPECT_NE(nullptr, static_cast<BSTR>(attributes));
 806   std::wstring attributes_str(attributes, attributes.Length());
 807   EXPECT_EQ(L"checkable:true;", attributes_str);
 808
 809   manager.reset();
 810   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 811 }
 812
 813 /**
 814  * Ensures that ui::AX_ATTR_TEXT_SEL_START/END attributes are correctly used to
 815  * determine caret position and text selection in various types of editable
 816  * elements.
 817  */
 818 TEST_F(BrowserAccessibilityTest, TestCaretAndTextSelection) {
 819   ui::AXNodeData root;
 820   root.id = 1;
 821   root.role = ui::AX_ROLE_ROOT_WEB_AREA;
 822   root.state = (1 << ui::AX_STATE_READ_ONLY) | (1 << ui::AX_STATE_FOCUSABLE);
 823
 824   ui::AXNodeData combo_box;
 825   combo_box.id = 2;
 826   combo_box.role = ui::AX_ROLE_COMBO_BOX;
 827   combo_box.state = (1 << ui::AX_STATE_FOCUSABLE) | (1 << ui::AX_STATE_FOCUSED);
 828   combo_box.SetValue("Test1");
 829   // Place the caret between 't' and 'e'.
 830   combo_box.AddIntAttribute(ui::AX_ATTR_TEXT_SEL_START, 1);
 831   combo_box.AddIntAttribute(ui::AX_ATTR_TEXT_SEL_END, 1);
 832
 833   ui::AXNodeData text_field;
 834   text_field.id = 3;
 835   text_field.role = ui::AX_ROLE_TEXT_FIELD;
 836   text_field.state = 1 << ui::AX_STATE_FOCUSABLE;
 837   text_field.SetValue("Test2");
 838   // Select the letter 'e'.
 839   text_field.AddIntAttribute(ui::AX_ATTR_TEXT_SEL_START, 1);
 840   text_field.AddIntAttribute(ui::AX_ATTR_TEXT_SEL_END, 2);
 841
 842   root.child_ids.push_back(2);
 843   root.child_ids.push_back(3);
 844
 845   CountedBrowserAccessibility::reset();
 846   scoped_ptr<BrowserAccessibilityManager> manager(
 847       BrowserAccessibilityManager::Create(
 848           MakeAXTreeUpdate(root, combo_box, text_field),
 849           nullptr, new CountedBrowserAccessibilityFactory()));
 850   ASSERT_EQ(3, CountedBrowserAccessibility::num_instances());
 851
 852   ASSERT_NE(nullptr, manager->GetRoot());
 853   BrowserAccessibilityWin* root_accessible =
 854       manager->GetRoot()->ToBrowserAccessibilityWin();
 855       ASSERT_NE(nullptr, root_accessible);
 856   ASSERT_EQ(2, root_accessible->PlatformChildCount());
 857
 858   BrowserAccessibilityWin* combo_box_accessible =
 859       root_accessible->PlatformGetChild(0)->ToBrowserAccessibilityWin();
 860   ASSERT_NE(nullptr, combo_box_accessible);
 861   manager->SetFocus(combo_box_accessible, false /* notify */);
 862   ASSERT_EQ(combo_box_accessible,
 863       manager->GetFocus(root_accessible)->ToBrowserAccessibilityWin());
 864   BrowserAccessibilityWin* text_field_accessible =
 865       root_accessible->PlatformGetChild(1)->ToBrowserAccessibilityWin();
 866   ASSERT_NE(nullptr, text_field_accessible);
 867
 868   // -2 is never a valid offset.
 869   LONG caret_offset = -2;
 870   LONG n_selections = -2;
 871   LONG selection_start = -2;
 872   LONG selection_end = -2;
 873
 874   // Test get_caretOffset.
 875   HRESULT hr = combo_box_accessible->get_caretOffset(&caret_offset);;
 876   EXPECT_EQ(S_OK, hr);
 877   EXPECT_EQ(1L, caret_offset);
 878   // caret_offset should be -1 when the object is not focused.
 879   hr = text_field_accessible->get_caretOffset(&caret_offset);;
 880   EXPECT_EQ(S_FALSE, hr);
 881   EXPECT_EQ(-1L, caret_offset);
 882
 883   // Move the focus to the text field.
 884   combo_box.state &= ~(1 << ui::AX_STATE_FOCUSED);
 885   text_field.state |= 1 << ui::AX_STATE_FOCUSED;
 886   manager->SetFocus(text_field_accessible, false /* notify */);
 887   ASSERT_EQ(text_field_accessible,
 888       manager->GetFocus(root_accessible)->ToBrowserAccessibilityWin());
 889
 890   // The caret should be at the start of the selection.
 891   hr = text_field_accessible->get_caretOffset(&caret_offset);;
 892   EXPECT_EQ(S_OK, hr);
 893   EXPECT_EQ(1L, caret_offset);
 894
 895   // Test get_nSelections.
 896   hr = combo_box_accessible->get_nSelections(&n_selections);;
 897   EXPECT_EQ(S_OK, hr);
 898   EXPECT_EQ(0L, n_selections);
 899   hr = text_field_accessible->get_nSelections(&n_selections);;
 900   EXPECT_EQ(S_OK, hr);
 901   EXPECT_EQ(1L, n_selections);
 902
 903   // Test get_selection.
 904   hr = combo_box_accessible->get_selection(
 905       0L /* selection_index */, &selection_start, &selection_end);;
 906   EXPECT_EQ(E_INVALIDARG, hr); // No selections available.
 907   // Invalid in_args should not modify out_args.
 908   EXPECT_EQ(-2L, selection_start);
 909   EXPECT_EQ(-2L, selection_end);
 910   hr = text_field_accessible->get_selection(
 911       0L /* selection_index */, &selection_start, &selection_end);;
 912   EXPECT_EQ(S_OK, hr);
 913   EXPECT_EQ(1L, selection_start);
 914   EXPECT_EQ(2L, selection_end);
 915
 916   manager.reset();
 917   ASSERT_EQ(0, CountedBrowserAccessibility::num_instances());
 918 }
 919
 920 }  // namespace content