src/content/browser/accessibility/accessibility_win_browsertest.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 <vector>
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "base/strings/utf_string_conversions.h"
   9 #include "base/win/scoped_bstr.h"
  10 #include "base/win/scoped_comptr.h"
  11 #include "base/win/scoped_variant.h"
  12 #include "content/browser/accessibility/accessibility_tree_formatter_utils_win.h"
  13 #include "content/browser/renderer_host/render_view_host_impl.h"
  14 #include "content/public/browser/notification_service.h"
  15 #include "content/public/browser/notification_types.h"
  16 #include "content/public/browser/render_view_host.h"
  17 #include "content/public/browser/render_widget_host_view.h"
  18 #include "content/public/browser/web_contents.h"
  19 #include "content/public/common/url_constants.h"
  20 #include "content/shell/browser/shell.h"
  21 #include "content/test/accessibility_browser_test_utils.h"
  22 #include "content/test/content_browser_test.h"
  23 #include "content/test/content_browser_test_utils.h"
  24 #include "third_party/iaccessible2/ia2_api_all.h"
  25 #include "third_party/isimpledom/ISimpleDOMNode.h"
  26
  27 // TODO(dmazzoni): Disabled accessibility tests on Win64. crbug.com/179717
  28 #if defined(ARCH_CPU_X86_64)
  29 #define MAYBE(x) DISABLED_##x
  30 #else
  31 #define MAYBE(x) x
  32 #endif
  33
  34 namespace content {
  35
  36 namespace {
  37
  38
  39 // Helpers --------------------------------------------------------------------
  40
  41 base::win::ScopedComPtr<IAccessible> GetAccessibleFromResultVariant(
  42     IAccessible* parent,
  43     VARIANT* var) {
  44   base::win::ScopedComPtr<IAccessible> ptr;
  45   switch (V_VT(var)) {
  46     case VT_DISPATCH: {
  47       IDispatch* dispatch = V_DISPATCH(var);
  48       if (dispatch)
  49         ptr.QueryFrom(dispatch);
  50       break;
  51     }
  52
  53     case VT_I4: {
  54       base::win::ScopedComPtr<IDispatch> dispatch;
  55       HRESULT hr = parent->get_accChild(*var, dispatch.Receive());
  56       EXPECT_TRUE(SUCCEEDED(hr));
  57       if (dispatch)
  58         dispatch.QueryInterface(ptr.Receive());
  59       break;
  60     }
  61   }
  62   return ptr;
  63 }
  64
  65 HRESULT QueryIAccessible2(IAccessible* accessible, IAccessible2** accessible2) {
  66   // TODO(ctguil): For some reason querying the IAccessible2 interface from
  67   // IAccessible fails.
  68   base::win::ScopedComPtr<IServiceProvider> service_provider;
  69   HRESULT hr = accessible->QueryInterface(service_provider.Receive());
  70   return SUCCEEDED(hr) ?
  71       service_provider->QueryService(IID_IAccessible2, accessible2) : hr;
  72 }
  73
  74 // Recursively search through all of the descendants reachable from an
  75 // IAccessible node and return true if we find one with the given role
  76 // and name.
  77 void RecursiveFindNodeInAccessibilityTree(IAccessible* node,
  78                                           int32 expected_role,
  79                                           const std::wstring& expected_name,
  80                                           int32 depth,
  81                                           bool* found) {
  82   base::win::ScopedBstr name_bstr;
  83   base::win::ScopedVariant childid_self(CHILDID_SELF);
  84   node->get_accName(childid_self, name_bstr.Receive());
  85   std::wstring name(name_bstr, name_bstr.Length());
  86   base::win::ScopedVariant role;
  87   node->get_accRole(childid_self, role.Receive());
  88   ASSERT_EQ(VT_I4, role.type());
  89
  90   // Print the accessibility tree as we go, because if this test fails
  91   // on the bots, this is really helpful in figuring out why.
  92   for (int i = 0; i < depth; i++)
  93     printf("  ");
  94   printf("role=%d name=%s\n", V_I4(&role), WideToUTF8(name).c_str());
  95
  96   if (expected_role == V_I4(&role) && expected_name == name) {
  97     *found = true;
  98     return;
  99   }
 100
 101   LONG child_count = 0;
 102   HRESULT hr = node->get_accChildCount(&child_count);
 103   ASSERT_EQ(S_OK, hr);
 104
 105   scoped_ptr<VARIANT[]> child_array(new VARIANT[child_count]);
 106   LONG obtained_count = 0;
 107   hr = AccessibleChildren(
 108       node, 0, child_count, child_array.get(), &obtained_count);
 109   ASSERT_EQ(S_OK, hr);
 110   ASSERT_EQ(child_count, obtained_count);
 111
 112   for (int index = 0; index < obtained_count; index++) {
 113     base::win::ScopedComPtr<IAccessible> child_accessible(
 114         GetAccessibleFromResultVariant(node, &child_array.get()[index]));
 115     if (child_accessible) {
 116       RecursiveFindNodeInAccessibilityTree(
 117           child_accessible.get(), expected_role, expected_name, depth + 1,
 118           found);
 119       if (*found)
 120         return;
 121     }
 122   }
 123 }
 124
 125
 126 // AccessibilityWinBrowserTest ------------------------------------------------
 127
 128 class AccessibilityWinBrowserTest : public ContentBrowserTest {
 129  public:
 130   AccessibilityWinBrowserTest();
 131   virtual ~AccessibilityWinBrowserTest();
 132
 133  protected:
 134   void LoadInitialAccessibilityTreeFromHtml(const std::string& html);
 135   IAccessible* GetRendererAccessible();
 136   void ExecuteScript(const std::wstring& script);
 137
 138  private:
 139   DISALLOW_COPY_AND_ASSIGN(AccessibilityWinBrowserTest);
 140 };
 141
 142 AccessibilityWinBrowserTest::AccessibilityWinBrowserTest() {
 143 }
 144
 145 AccessibilityWinBrowserTest::~AccessibilityWinBrowserTest() {
 146 }
 147
 148 void AccessibilityWinBrowserTest::LoadInitialAccessibilityTreeFromHtml(
 149     const std::string& html) {
 150   AccessibilityNotificationWaiter waiter(
 151       shell(), AccessibilityModeComplete,
 152       WebKit::WebAXEventLoadComplete);
 153   GURL html_data_url("data:text/html," + html);
 154   NavigateToURL(shell(), html_data_url);
 155   waiter.WaitForNotification();
 156 }
 157
 158 // Retrieve the MSAA client accessibility object for the Render Widget Host View
 159 // of the selected tab.
 160 IAccessible* AccessibilityWinBrowserTest::GetRendererAccessible() {
 161   HWND hwnd_render_widget_host_view =
 162       shell()->web_contents()->GetRenderWidgetHostView()->GetNativeView();
 163
 164   // Invoke windows screen reader detection by sending the WM_GETOBJECT message
 165   // with kIdCustom as the LPARAM.
 166   const int32 kIdCustom = 1;
 167   SendMessage(
 168       hwnd_render_widget_host_view, WM_GETOBJECT, OBJID_CLIENT, kIdCustom);
 169
 170   IAccessible* accessible;
 171   HRESULT hr = AccessibleObjectFromWindow(
 172       hwnd_render_widget_host_view, OBJID_CLIENT,
 173       IID_IAccessible, reinterpret_cast<void**>(&accessible));
 174
 175   EXPECT_EQ(S_OK, hr);
 176   EXPECT_NE(accessible, reinterpret_cast<IAccessible*>(NULL));
 177
 178   return accessible;
 179 }
 180
 181 void AccessibilityWinBrowserTest::ExecuteScript(const std::wstring& script) {
 182   shell()->web_contents()->GetRenderViewHost()->ExecuteJavascriptInWebFrame(
 183       std::wstring(), script);
 184 }
 185
 186
 187 // AccessibleChecker ----------------------------------------------------------
 188
 189 class AccessibleChecker {
 190  public:
 191   // This constructor can be used if the IA2 role will be the same as the MSAA
 192   // role.
 193   AccessibleChecker(const std::wstring& expected_name,
 194                     int32 expected_role,
 195                     const std::wstring& expected_value);
 196   AccessibleChecker(const std::wstring& expected_name,
 197                     int32 expected_role,
 198                     int32 expected_ia2_role,
 199                     const std::wstring& expected_value);
 200   AccessibleChecker(const std::wstring& expected_name,
 201                     const std::wstring& expected_role,
 202                     int32 expected_ia2_role,
 203                     const std::wstring& expected_value);
 204
 205   // Append an AccessibleChecker that verifies accessibility information for
 206   // a child IAccessible. Order is important.
 207   void AppendExpectedChild(AccessibleChecker* expected_child);
 208
 209   // Check that the name and role of the given IAccessible instance and its
 210   // descendants match the expected names and roles that this object was
 211   // initialized with.
 212   void CheckAccessible(IAccessible* accessible);
 213
 214   // Set the expected value for this AccessibleChecker.
 215   void SetExpectedValue(const std::wstring& expected_value);
 216
 217   // Set the expected state for this AccessibleChecker.
 218   void SetExpectedState(LONG expected_state);
 219
 220  private:
 221   typedef std::vector<AccessibleChecker*> AccessibleCheckerVector;
 222
 223   void CheckAccessibleName(IAccessible* accessible);
 224   void CheckAccessibleRole(IAccessible* accessible);
 225   void CheckIA2Role(IAccessible* accessible);
 226   void CheckAccessibleValue(IAccessible* accessible);
 227   void CheckAccessibleState(IAccessible* accessible);
 228   void CheckAccessibleChildren(IAccessible* accessible);
 229   string16 RoleVariantToString(const base::win::ScopedVariant& role);
 230
 231   // Expected accessible name. Checked against IAccessible::get_accName.
 232   std::wstring name_;
 233
 234   // Expected accessible role. Checked against IAccessible::get_accRole.
 235   base::win::ScopedVariant role_;
 236
 237   // Expected IAccessible2 role. Checked against IAccessible2::role.
 238   int32 ia2_role_;
 239
 240   // Expected accessible value. Checked against IAccessible::get_accValue.
 241   std::wstring value_;
 242
 243   // Expected accessible state. Checked against IAccessible::get_accState.
 244   LONG state_;
 245
 246   // Expected accessible children. Checked using IAccessible::get_accChildCount
 247   // and ::AccessibleChildren.
 248   AccessibleCheckerVector children_;
 249 };
 250
 251 AccessibleChecker::AccessibleChecker(const std::wstring& expected_name,
 252                                      int32 expected_role,
 253                                      const std::wstring& expected_value)
 254     : name_(expected_name),
 255       role_(expected_role),
 256       ia2_role_(expected_role),
 257       value_(expected_value),
 258       state_(-1) {
 259 }
 260
 261 AccessibleChecker::AccessibleChecker(const std::wstring& expected_name,
 262                                      int32 expected_role,
 263                                      int32 expected_ia2_role,
 264                                      const std::wstring& expected_value)
 265     : name_(expected_name),
 266       role_(expected_role),
 267       ia2_role_(expected_ia2_role),
 268       value_(expected_value),
 269       state_(-1) {
 270 }
 271
 272 AccessibleChecker::AccessibleChecker(const std::wstring& expected_name,
 273                                      const std::wstring& expected_role,
 274                                      int32 expected_ia2_role,
 275                                      const std::wstring& expected_value)
 276     : name_(expected_name),
 277       role_(expected_role.c_str()),
 278       ia2_role_(expected_ia2_role),
 279       value_(expected_value),
 280       state_(-1) {
 281 }
 282
 283 void AccessibleChecker::AppendExpectedChild(
 284     AccessibleChecker* expected_child) {
 285   children_.push_back(expected_child);
 286 }
 287
 288 void AccessibleChecker::CheckAccessible(IAccessible* accessible) {
 289   SCOPED_TRACE("while checking " + UTF16ToUTF8(RoleVariantToString(role_)));
 290   CheckAccessibleName(accessible);
 291   CheckAccessibleRole(accessible);
 292   CheckIA2Role(accessible);
 293   CheckAccessibleValue(accessible);
 294   CheckAccessibleState(accessible);
 295   CheckAccessibleChildren(accessible);
 296 }
 297
 298 void AccessibleChecker::SetExpectedValue(const std::wstring& expected_value) {
 299   value_ = expected_value;
 300 }
 301
 302 void AccessibleChecker::SetExpectedState(LONG expected_state) {
 303   state_ = expected_state;
 304 }
 305
 306 void AccessibleChecker::CheckAccessibleName(IAccessible* accessible) {
 307   base::win::ScopedBstr name;
 308   base::win::ScopedVariant childid_self(CHILDID_SELF);
 309   HRESULT hr = accessible->get_accName(childid_self, name.Receive());
 310
 311   if (name_.empty()) {
 312     // If the object doesn't have name S_FALSE should be returned.
 313     EXPECT_EQ(S_FALSE, hr);
 314   } else {
 315     // Test that the correct string was returned.
 316     EXPECT_EQ(S_OK, hr);
 317     EXPECT_EQ(name_, std::wstring(name, name.Length()));
 318   }
 319 }
 320
 321 void AccessibleChecker::CheckAccessibleRole(IAccessible* accessible) {
 322   base::win::ScopedVariant role;
 323   base::win::ScopedVariant childid_self(CHILDID_SELF);
 324   HRESULT hr = accessible->get_accRole(childid_self, role.Receive());
 325   ASSERT_EQ(S_OK, hr);
 326   EXPECT_EQ(0, role_.Compare(role))
 327       << "Expected role: " << RoleVariantToString(role_)
 328       << "\nGot role: " << RoleVariantToString(role);
 329 }
 330
 331 void AccessibleChecker::CheckIA2Role(IAccessible* accessible) {
 332   base::win::ScopedComPtr<IAccessible2> accessible2;
 333   HRESULT hr = QueryIAccessible2(accessible, accessible2.Receive());
 334   ASSERT_EQ(S_OK, hr);
 335   long ia2_role = 0;
 336   hr = accessible2->role(&ia2_role);
 337   ASSERT_EQ(S_OK, hr);
 338   EXPECT_EQ(ia2_role_, ia2_role)
 339     << "Expected ia2 role: " << IAccessible2RoleToString(ia2_role_)
 340     << "\nGot ia2 role: " << IAccessible2RoleToString(ia2_role);
 341 }
 342
 343 void AccessibleChecker::CheckAccessibleValue(IAccessible* accessible) {
 344   // Don't check the value if if's a DOCUMENT role, because the value
 345   // is supposed to be the url (and we don't keep track of that in the
 346   // test expectations).
 347   base::win::ScopedVariant role;
 348   base::win::ScopedVariant childid_self(CHILDID_SELF);
 349   HRESULT hr = accessible->get_accRole(childid_self, role.Receive());
 350   ASSERT_EQ(S_OK, hr);
 351   if (role.type() == VT_I4 && V_I4(&role) == ROLE_SYSTEM_DOCUMENT)
 352     return;
 353
 354   // Get the value.
 355   base::win::ScopedBstr value;
 356   hr = accessible->get_accValue(childid_self, value.Receive());
 357   EXPECT_EQ(S_OK, hr);
 358
 359   // Test that the correct string was returned.
 360   EXPECT_EQ(value_, std::wstring(value, value.Length()));
 361 }
 362
 363 void AccessibleChecker::CheckAccessibleState(IAccessible* accessible) {
 364   if (state_ < 0)
 365     return;
 366
 367   base::win::ScopedVariant state;
 368   base::win::ScopedVariant childid_self(CHILDID_SELF);
 369   HRESULT hr = accessible->get_accState(childid_self, state.Receive());
 370   EXPECT_EQ(S_OK, hr);
 371   ASSERT_EQ(VT_I4, state.type());
 372   LONG obj_state = V_I4(&state);
 373   // Avoid flakiness. The "offscreen" state depends on whether the browser
 374   // window is frontmost or not, and "hottracked" depends on whether the
 375   // mouse cursor happens to be over the element.
 376   obj_state &= ~(STATE_SYSTEM_OFFSCREEN | STATE_SYSTEM_HOTTRACKED);
 377   EXPECT_EQ(state_, obj_state)
 378     << "Expected state: " << IAccessibleStateToString(state_)
 379     << "\nGot state: " << IAccessibleStateToString(obj_state);
 380 }
 381
 382 void AccessibleChecker::CheckAccessibleChildren(IAccessible* parent) {
 383   LONG child_count = 0;
 384   HRESULT hr = parent->get_accChildCount(&child_count);
 385   EXPECT_EQ(S_OK, hr);
 386   ASSERT_EQ(child_count, children_.size());
 387
 388   scoped_ptr<VARIANT[]> child_array(new VARIANT[child_count]);
 389   LONG obtained_count = 0;
 390   hr = AccessibleChildren(parent, 0, child_count,
 391                           child_array.get(), &obtained_count);
 392   ASSERT_EQ(S_OK, hr);
 393   ASSERT_EQ(child_count, obtained_count);
 394
 395   VARIANT* child = child_array.get();
 396   for (AccessibleCheckerVector::iterator child_checker = children_.begin();
 397        child_checker != children_.end();
 398        ++child_checker, ++child) {
 399     base::win::ScopedComPtr<IAccessible> child_accessible(
 400         GetAccessibleFromResultVariant(parent, child));
 401     ASSERT_TRUE(child_accessible.get());
 402     (*child_checker)->CheckAccessible(child_accessible);
 403   }
 404 }
 405
 406 string16 AccessibleChecker::RoleVariantToString(
 407     const base::win::ScopedVariant& role) {
 408   if (role.type() == VT_I4)
 409     return IAccessibleRoleToString(V_I4(&role));
 410   if (role.type() == VT_BSTR)
 411     return string16(V_BSTR(&role), SysStringLen(V_BSTR(&role)));
 412   return string16();
 413 }
 414
 415 }  // namespace
 416
 417
 418 // Tests ----------------------------------------------------------------------
 419
 420 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest,
 421                        MAYBE(TestBusyAccessibilityTree)) {
 422   NavigateToURL(shell(), GURL(kAboutBlankURL));
 423
 424   // The initial accessible returned should have state STATE_SYSTEM_BUSY while
 425   // the accessibility tree is being requested from the renderer.
 426   AccessibleChecker document1_checker(std::wstring(), ROLE_SYSTEM_DOCUMENT,
 427                                       std::wstring());
 428   document1_checker.SetExpectedState(
 429       STATE_SYSTEM_READONLY | STATE_SYSTEM_FOCUSABLE | STATE_SYSTEM_FOCUSED |
 430       STATE_SYSTEM_BUSY);
 431   document1_checker.CheckAccessible(GetRendererAccessible());
 432 }
 433
 434 // Flaky, http://crbug.com/167320 .
 435 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest,
 436                        DISABLED_TestRendererAccessibilityTree) {
 437   LoadInitialAccessibilityTreeFromHtml(
 438       "<html><head><title>Accessibility Win Test</title></head>"
 439       "<body><input type='button' value='push' /><input type='checkbox' />"
 440       "</body></html>");
 441
 442   // Check the browser's copy of the renderer accessibility tree.
 443   AccessibleChecker button_checker(L"push", ROLE_SYSTEM_PUSHBUTTON,
 444                                    std::wstring());
 445   AccessibleChecker checkbox_checker(std::wstring(), ROLE_SYSTEM_CHECKBUTTON,
 446                                      std::wstring());
 447   AccessibleChecker body_checker(std::wstring(), L"body", IA2_ROLE_SECTION,
 448                                  std::wstring());
 449   AccessibleChecker document2_checker(L"Accessibility Win Test",
 450                                       ROLE_SYSTEM_DOCUMENT, std::wstring());
 451   body_checker.AppendExpectedChild(&button_checker);
 452   body_checker.AppendExpectedChild(&checkbox_checker);
 453   document2_checker.AppendExpectedChild(&body_checker);
 454   document2_checker.CheckAccessible(GetRendererAccessible());
 455
 456   // Check that document accessible has a parent accessible.
 457   base::win::ScopedComPtr<IAccessible> document_accessible(
 458       GetRendererAccessible());
 459   ASSERT_NE(document_accessible.get(), reinterpret_cast<IAccessible*>(NULL));
 460   base::win::ScopedComPtr<IDispatch> parent_dispatch;
 461   HRESULT hr = document_accessible->get_accParent(parent_dispatch.Receive());
 462   EXPECT_EQ(S_OK, hr);
 463   EXPECT_NE(parent_dispatch, reinterpret_cast<IDispatch*>(NULL));
 464
 465   // Navigate to another page.
 466   NavigateToURL(shell(), GURL(kAboutBlankURL));
 467
 468   // Verify that the IAccessible reference still points to a valid object and
 469   // that calls to its methods fail since the tree is no longer valid after
 470   // the page navagation.
 471   base::win::ScopedBstr name;
 472   base::win::ScopedVariant childid_self(CHILDID_SELF);
 473   hr = document_accessible->get_accName(childid_self, name.Receive());
 474   ASSERT_EQ(E_FAIL, hr);
 475 }
 476
 477 // Periodically failing.  See crbug.com/145537
 478 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest,
 479                        DISABLED_TestNotificationActiveDescendantChanged) {
 480   LoadInitialAccessibilityTreeFromHtml(
 481       "<ul tabindex='-1' role='radiogroup' aria-label='ul'>"
 482       "<li id='li'>li</li></ul>");
 483
 484   // Check the browser's copy of the renderer accessibility tree.
 485   AccessibleChecker list_marker_checker(L"\x2022", ROLE_SYSTEM_TEXT,
 486                                         std::wstring());
 487   AccessibleChecker static_text_checker(L"li", ROLE_SYSTEM_TEXT,
 488                                         std::wstring());
 489   AccessibleChecker list_item_checker(std::wstring(), ROLE_SYSTEM_LISTITEM,
 490                                       std::wstring());
 491   list_item_checker.SetExpectedState(STATE_SYSTEM_READONLY);
 492   AccessibleChecker radio_group_checker(L"ul", ROLE_SYSTEM_GROUPING,
 493                                         IA2_ROLE_SECTION, std::wstring());
 494   radio_group_checker.SetExpectedState(STATE_SYSTEM_FOCUSABLE);
 495   AccessibleChecker document_checker(std::wstring(), ROLE_SYSTEM_DOCUMENT,
 496                                      std::wstring());
 497   list_item_checker.AppendExpectedChild(&list_marker_checker);
 498   list_item_checker.AppendExpectedChild(&static_text_checker);
 499   radio_group_checker.AppendExpectedChild(&list_item_checker);
 500   document_checker.AppendExpectedChild(&radio_group_checker);
 501   document_checker.CheckAccessible(GetRendererAccessible());
 502
 503   // Set focus to the radio group.
 504   scoped_ptr<AccessibilityNotificationWaiter> waiter(
 505       new AccessibilityNotificationWaiter(
 506           shell(), AccessibilityModeComplete,
 507           WebKit::WebAXEventFocus));
 508   ExecuteScript(L"document.body.children[0].focus()");
 509   waiter->WaitForNotification();
 510
 511   // Check that the accessibility tree of the browser has been updated.
 512   radio_group_checker.SetExpectedState(
 513       STATE_SYSTEM_FOCUSABLE | STATE_SYSTEM_FOCUSED);
 514   document_checker.CheckAccessible(GetRendererAccessible());
 515
 516   // Set the active descendant of the radio group
 517   waiter.reset(new AccessibilityNotificationWaiter(
 518       shell(), AccessibilityModeComplete,
 519       WebKit::WebAXEventFocus));
 520   ExecuteScript(
 521       L"document.body.children[0].setAttribute('aria-activedescendant', 'li')");
 522   waiter->WaitForNotification();
 523
 524   // Check that the accessibility tree of the browser has been updated.
 525   list_item_checker.SetExpectedState(
 526       STATE_SYSTEM_READONLY | STATE_SYSTEM_FOCUSED);
 527   radio_group_checker.SetExpectedState(STATE_SYSTEM_FOCUSABLE);
 528   document_checker.CheckAccessible(GetRendererAccessible());
 529 }
 530
 531 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest,
 532                        MAYBE(TestNotificationCheckedStateChanged)) {
 533   LoadInitialAccessibilityTreeFromHtml(
 534       "<body><input type='checkbox' /></body>");
 535
 536   // Check the browser's copy of the renderer accessibility tree.
 537   AccessibleChecker checkbox_checker(std::wstring(), ROLE_SYSTEM_CHECKBUTTON,
 538                                      std::wstring());
 539   checkbox_checker.SetExpectedState(STATE_SYSTEM_FOCUSABLE);
 540   AccessibleChecker body_checker(std::wstring(), L"body", IA2_ROLE_SECTION,
 541                                  std::wstring());
 542   AccessibleChecker document_checker(std::wstring(), ROLE_SYSTEM_DOCUMENT,
 543                                      std::wstring());
 544   body_checker.AppendExpectedChild(&checkbox_checker);
 545   document_checker.AppendExpectedChild(&body_checker);
 546   document_checker.CheckAccessible(GetRendererAccessible());
 547
 548   // Check the checkbox.
 549   scoped_ptr<AccessibilityNotificationWaiter> waiter(
 550       new AccessibilityNotificationWaiter(
 551           shell(), AccessibilityModeComplete,
 552           WebKit::WebAXEventCheckedStateChanged));
 553   ExecuteScript(L"document.body.children[0].checked=true");
 554   waiter->WaitForNotification();
 555
 556   // Check that the accessibility tree of the browser has been updated.
 557   checkbox_checker.SetExpectedState(
 558       STATE_SYSTEM_CHECKED | STATE_SYSTEM_FOCUSABLE);
 559   document_checker.CheckAccessible(GetRendererAccessible());
 560 }
 561
 562 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest,
 563                        MAYBE(TestNotificationChildrenChanged)) {
 564   // The role attribute causes the node to be in the accessibility tree.
 565   LoadInitialAccessibilityTreeFromHtml("<body role=group></body>");
 566
 567   // Check the browser's copy of the renderer accessibility tree.
 568   AccessibleChecker group_checker(std::wstring(), ROLE_SYSTEM_GROUPING,
 569                                   std::wstring());
 570   AccessibleChecker document_checker(std::wstring(), ROLE_SYSTEM_DOCUMENT,
 571                                      std::wstring());
 572   document_checker.AppendExpectedChild(&group_checker);
 573   document_checker.CheckAccessible(GetRendererAccessible());
 574
 575   // Change the children of the document body.
 576   scoped_ptr<AccessibilityNotificationWaiter> waiter(
 577       new AccessibilityNotificationWaiter(
 578           shell(),
 579           AccessibilityModeComplete,
 580           WebKit::WebAXEventChildrenChanged));
 581   ExecuteScript(L"document.body.innerHTML='<b>new text</b>'");
 582   waiter->WaitForNotification();
 583
 584   // Check that the accessibility tree of the browser has been updated.
 585   AccessibleChecker text_checker(L"new text", ROLE_SYSTEM_TEXT, std::wstring());
 586   group_checker.AppendExpectedChild(&text_checker);
 587   document_checker.CheckAccessible(GetRendererAccessible());
 588 }
 589
 590 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest,
 591                        MAYBE(TestNotificationChildrenChanged2)) {
 592   // The role attribute causes the node to be in the accessibility tree.
 593   LoadInitialAccessibilityTreeFromHtml(
 594       "<div role=group style='visibility: hidden'>text</div>");
 595
 596   // Check the accessible tree of the browser.
 597   AccessibleChecker document_checker(std::wstring(), ROLE_SYSTEM_DOCUMENT,
 598                                      std::wstring());
 599   document_checker.CheckAccessible(GetRendererAccessible());
 600
 601   // Change the children of the document body.
 602   scoped_ptr<AccessibilityNotificationWaiter> waiter(
 603       new AccessibilityNotificationWaiter(
 604           shell(), AccessibilityModeComplete,
 605           WebKit::WebAXEventChildrenChanged));
 606   ExecuteScript(L"document.body.children[0].style.visibility='visible'");
 607   waiter->WaitForNotification();
 608
 609   // Check that the accessibility tree of the browser has been updated.
 610   AccessibleChecker static_text_checker(L"text", ROLE_SYSTEM_TEXT,
 611                                         std::wstring());
 612   AccessibleChecker group_checker(std::wstring(), ROLE_SYSTEM_GROUPING,
 613                                   std::wstring());
 614   document_checker.AppendExpectedChild(&group_checker);
 615   group_checker.AppendExpectedChild(&static_text_checker);
 616   document_checker.CheckAccessible(GetRendererAccessible());
 617 }
 618
 619 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest,
 620                        MAYBE(TestNotificationFocusChanged)) {
 621   // The role attribute causes the node to be in the accessibility tree.
 622   LoadInitialAccessibilityTreeFromHtml("<div role=group tabindex='-1'></div>");
 623
 624   // Check the browser's copy of the renderer accessibility tree.
 625   SCOPED_TRACE("Check initial tree");
 626   AccessibleChecker group_checker(std::wstring(), ROLE_SYSTEM_GROUPING,
 627                                   std::wstring());
 628   group_checker.SetExpectedState(STATE_SYSTEM_FOCUSABLE);
 629   AccessibleChecker document_checker(std::wstring(), ROLE_SYSTEM_DOCUMENT,
 630                                      std::wstring());
 631   document_checker.AppendExpectedChild(&group_checker);
 632   document_checker.CheckAccessible(GetRendererAccessible());
 633
 634   // Focus the div in the document
 635   scoped_ptr<AccessibilityNotificationWaiter> waiter(
 636       new AccessibilityNotificationWaiter(
 637           shell(), AccessibilityModeComplete,
 638           WebKit::WebAXEventFocus));
 639   ExecuteScript(L"document.body.children[0].focus()");
 640   waiter->WaitForNotification();
 641
 642   // Check that the accessibility tree of the browser has been updated.
 643   SCOPED_TRACE("Check updated tree after focusing div");
 644   group_checker.SetExpectedState(
 645       STATE_SYSTEM_FOCUSABLE | STATE_SYSTEM_FOCUSED);
 646   document_checker.CheckAccessible(GetRendererAccessible());
 647
 648   // Focus the document accessible. This will un-focus the current node.
 649   waiter.reset(
 650       new AccessibilityNotificationWaiter(
 651           shell(), AccessibilityModeComplete,
 652           WebKit::WebAXEventBlur));
 653   base::win::ScopedComPtr<IAccessible> document_accessible(
 654       GetRendererAccessible());
 655   ASSERT_NE(document_accessible.get(), reinterpret_cast<IAccessible*>(NULL));
 656   base::win::ScopedVariant childid_self(CHILDID_SELF);
 657   HRESULT hr = document_accessible->accSelect(SELFLAG_TAKEFOCUS, childid_self);
 658   ASSERT_EQ(S_OK, hr);
 659   waiter->WaitForNotification();
 660
 661   // Check that the accessibility tree of the browser has been updated.
 662   SCOPED_TRACE("Check updated tree after focusing document again");
 663   group_checker.SetExpectedState(STATE_SYSTEM_FOCUSABLE);
 664   document_checker.CheckAccessible(GetRendererAccessible());
 665 }
 666
 667 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest,
 668                        MAYBE(TestNotificationValueChanged)) {
 669   LoadInitialAccessibilityTreeFromHtml(
 670       "<body><input type='text' value='old value'/></body>");
 671
 672   // Check the browser's copy of the renderer accessibility tree.
 673   AccessibleChecker text_field_checker(std::wstring(), ROLE_SYSTEM_TEXT,
 674                                        L"old value");
 675   text_field_checker.SetExpectedState(STATE_SYSTEM_FOCUSABLE);
 676   AccessibleChecker body_checker(std::wstring(), L"body", IA2_ROLE_SECTION,
 677                                  std::wstring());
 678   AccessibleChecker document_checker(std::wstring(), ROLE_SYSTEM_DOCUMENT,
 679                                      std::wstring());
 680   body_checker.AppendExpectedChild(&text_field_checker);
 681   document_checker.AppendExpectedChild(&body_checker);
 682   document_checker.CheckAccessible(GetRendererAccessible());
 683
 684   // Set the value of the text control
 685   scoped_ptr<AccessibilityNotificationWaiter> waiter(
 686       new AccessibilityNotificationWaiter(
 687           shell(), AccessibilityModeComplete,
 688           WebKit::WebAXEventValueChanged));
 689   ExecuteScript(L"document.body.children[0].value='new value'");
 690   waiter->WaitForNotification();
 691
 692   // Check that the accessibility tree of the browser has been updated.
 693   text_field_checker.SetExpectedValue(L"new value");
 694   document_checker.CheckAccessible(GetRendererAccessible());
 695 }
 696
 697 // This test verifies that the web content's accessibility tree is a
 698 // descendant of the main browser window's accessibility tree, so that
 699 // tools like AccExplorer32 or AccProbe can be used to examine Chrome's
 700 // accessibility support.
 701 //
 702 // If you made a change and this test now fails, check that the NativeViewHost
 703 // that wraps the tab contents returns the IAccessible implementation
 704 // provided by RenderWidgetHostViewWin in GetNativeViewAccessible().
 705 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest,
 706                        MAYBE(ContainsRendererAccessibilityTree)) {
 707   LoadInitialAccessibilityTreeFromHtml(
 708       "<html><head><title>MyDocument</title></head>"
 709       "<body>Content</body></html>");
 710
 711   // Get the accessibility object for the browser window.
 712   HWND browser_hwnd = shell()->window();
 713   base::win::ScopedComPtr<IAccessible> browser_accessible;
 714   HRESULT hr = AccessibleObjectFromWindow(
 715       browser_hwnd,
 716       OBJID_WINDOW,
 717       IID_IAccessible,
 718       reinterpret_cast<void**>(browser_accessible.Receive()));
 719   ASSERT_EQ(S_OK, hr);
 720
 721   bool found = false;
 722   RecursiveFindNodeInAccessibilityTree(
 723       browser_accessible.get(), ROLE_SYSTEM_DOCUMENT, L"MyDocument", 0, &found);
 724   ASSERT_EQ(found, true);
 725 }
 726
 727 // Disabled because of http://crbug.com/144390.
 728 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest,
 729                        DISABLED_TestToggleButtonRoleAndStates) {
 730   AccessibleChecker* button_checker;
 731   std::string button_html("data:text/html,");
 732   AccessibleChecker document_checker(std::wstring(), ROLE_SYSTEM_DOCUMENT,
 733                                      std::wstring());
 734   AccessibleChecker body_checker(std::wstring(), L"body", IA2_ROLE_SECTION,
 735                                  std::wstring());
 736   document_checker.AppendExpectedChild(&body_checker);
 737
 738 // Temporary macro
 739 #define ADD_BUTTON(html, ia2_role, state) \
 740     button_html += html; \
 741     button_checker = new AccessibleChecker(L"x", ROLE_SYSTEM_PUSHBUTTON, \
 742       ia2_role, std::wstring()); \
 743     button_checker->SetExpectedState(state); \
 744     body_checker.AppendExpectedChild(button_checker)
 745
 746   // If aria-pressed is 'undefined', empty or not present, use PUSHBUTTON
 747   // Otherwise use TOGGLE_BUTTON, even if the value is invalid.
 748   // The spec does this in an attempt future-proof in case new values are added.
 749   ADD_BUTTON("<span role='button' aria-pressed='false'>x</span>",
 750       IA2_ROLE_TOGGLE_BUTTON, 0);
 751   ADD_BUTTON("<span role='button' aria-pressed='true'>x</span>",
 752       IA2_ROLE_TOGGLE_BUTTON, STATE_SYSTEM_PRESSED);
 753   ADD_BUTTON("<span role='button' aria-pressed='mixed'>x</span>",
 754       IA2_ROLE_TOGGLE_BUTTON, STATE_SYSTEM_MIXED);
 755   ADD_BUTTON("<span role='button' aria-pressed='xyz'>x</span>",
 756     IA2_ROLE_TOGGLE_BUTTON, 0);
 757   ADD_BUTTON("<span role='button' aria-pressed=''>x</span>",
 758       ROLE_SYSTEM_PUSHBUTTON, 0);
 759   ADD_BUTTON("<span role='button' aria-pressed>x</span>",
 760       ROLE_SYSTEM_PUSHBUTTON, 0);
 761   ADD_BUTTON("<span role='button' aria-pressed='undefined'>x</span>",
 762       ROLE_SYSTEM_PUSHBUTTON, 0);
 763   ADD_BUTTON("<span role='button'>x</span>", ROLE_SYSTEM_PUSHBUTTON, 0);
 764   ADD_BUTTON("<input type='button' aria-pressed='true' value='x'/>",
 765       IA2_ROLE_TOGGLE_BUTTON, STATE_SYSTEM_FOCUSABLE | STATE_SYSTEM_PRESSED);
 766   ADD_BUTTON("<input type='button' aria-pressed='false' value='x'/>",
 767       IA2_ROLE_TOGGLE_BUTTON, STATE_SYSTEM_FOCUSABLE);
 768   ADD_BUTTON("<input type='button' aria-pressed='mixed' value='x'>",
 769       IA2_ROLE_TOGGLE_BUTTON, STATE_SYSTEM_FOCUSABLE | STATE_SYSTEM_MIXED);
 770   ADD_BUTTON("<input type='button' aria-pressed='xyz' value='x'/>",
 771       IA2_ROLE_TOGGLE_BUTTON, STATE_SYSTEM_FOCUSABLE);
 772   ADD_BUTTON("<input type='button' aria-pressed='' value='x'/>",
 773       ROLE_SYSTEM_PUSHBUTTON, STATE_SYSTEM_FOCUSABLE);
 774   ADD_BUTTON("<input type='button' aria-pressed value='x'>",
 775       ROLE_SYSTEM_PUSHBUTTON, STATE_SYSTEM_FOCUSABLE);
 776   ADD_BUTTON("<input type='button' aria-pressed='undefined' value='x'>",
 777       ROLE_SYSTEM_PUSHBUTTON, STATE_SYSTEM_FOCUSABLE);
 778   ADD_BUTTON("<input type='button' value='x'>",
 779       ROLE_SYSTEM_PUSHBUTTON, STATE_SYSTEM_FOCUSABLE);
 780   ADD_BUTTON("<button aria-pressed='true'>x</button>",
 781       IA2_ROLE_TOGGLE_BUTTON, STATE_SYSTEM_FOCUSABLE | STATE_SYSTEM_PRESSED);
 782   ADD_BUTTON("<button aria-pressed='false'>x</button>",
 783       IA2_ROLE_TOGGLE_BUTTON, STATE_SYSTEM_FOCUSABLE);
 784   ADD_BUTTON("<button aria-pressed='mixed'>x</button>", IA2_ROLE_TOGGLE_BUTTON,
 785       STATE_SYSTEM_FOCUSABLE | STATE_SYSTEM_MIXED);
 786   ADD_BUTTON("<button aria-pressed='xyz'>x</button>", IA2_ROLE_TOGGLE_BUTTON,
 787       STATE_SYSTEM_FOCUSABLE);
 788   ADD_BUTTON("<button aria-pressed=''>x</button>",
 789       ROLE_SYSTEM_PUSHBUTTON, STATE_SYSTEM_FOCUSABLE);
 790   ADD_BUTTON("<button aria-pressed>x</button>",
 791       ROLE_SYSTEM_PUSHBUTTON, STATE_SYSTEM_FOCUSABLE);
 792   ADD_BUTTON("<button aria-pressed='undefined'>x</button>",
 793       ROLE_SYSTEM_PUSHBUTTON, STATE_SYSTEM_FOCUSABLE);
 794   ADD_BUTTON("<button>x</button>", ROLE_SYSTEM_PUSHBUTTON,
 795       STATE_SYSTEM_FOCUSABLE);
 796 #undef ADD_BUTTON    // Temporary macro
 797
 798   LoadInitialAccessibilityTreeFromHtml(button_html);
 799   document_checker.CheckAccessible(GetRendererAccessible());
 800 }
 801
 802 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest,
 803                        MAYBE(SupportsISimpleDOM)) {
 804   LoadInitialAccessibilityTreeFromHtml(
 805       "<body><input type='checkbox' /></body>");
 806
 807   // Get the IAccessible object for the document.
 808   base::win::ScopedComPtr<IAccessible> document_accessible(
 809       GetRendererAccessible());
 810   ASSERT_NE(document_accessible.get(), reinterpret_cast<IAccessible*>(NULL));
 811
 812   // Get the ISimpleDOM object for the document.
 813   base::win::ScopedComPtr<IServiceProvider> service_provider;
 814   HRESULT hr = static_cast<IAccessible*>(document_accessible)->QueryInterface(
 815       service_provider.Receive());
 816   ASSERT_EQ(S_OK, hr);
 817   const GUID refguid = {0x0c539790, 0x12e4, 0x11cf,
 818                         0xb6, 0x61, 0x00, 0xaa, 0x00, 0x4c, 0xd6, 0xd8};
 819   base::win::ScopedComPtr<ISimpleDOMNode> document_isimpledomnode;
 820   hr = static_cast<IServiceProvider *>(service_provider)->QueryService(
 821       refguid, IID_ISimpleDOMNode,
 822       reinterpret_cast<void**>(document_isimpledomnode.Receive()));
 823   ASSERT_EQ(S_OK, hr);
 824
 825   base::win::ScopedBstr node_name;
 826   short name_space_id;  // NOLINT
 827   base::win::ScopedBstr node_value;
 828   unsigned int num_children;
 829   unsigned int unique_id;
 830   unsigned short node_type;  // NOLINT
 831   hr = document_isimpledomnode->get_nodeInfo(
 832       node_name.Receive(), &name_space_id, node_value.Receive(), &num_children,
 833       &unique_id, &node_type);
 834   ASSERT_EQ(S_OK, hr);
 835   EXPECT_EQ(NODETYPE_DOCUMENT, node_type);
 836   EXPECT_EQ(1, num_children);
 837   node_name.Reset();
 838   node_value.Reset();
 839
 840   base::win::ScopedComPtr<ISimpleDOMNode> body_isimpledomnode;
 841   hr = document_isimpledomnode->get_firstChild(
 842       body_isimpledomnode.Receive());
 843   ASSERT_EQ(S_OK, hr);
 844   hr = body_isimpledomnode->get_nodeInfo(
 845       node_name.Receive(), &name_space_id, node_value.Receive(), &num_children,
 846       &unique_id, &node_type);
 847   ASSERT_EQ(S_OK, hr);
 848   EXPECT_EQ(L"body", std::wstring(node_name, node_name.Length()));
 849   EXPECT_EQ(NODETYPE_ELEMENT, node_type);
 850   EXPECT_EQ(1, num_children);
 851   node_name.Reset();
 852   node_value.Reset();
 853
 854   base::win::ScopedComPtr<ISimpleDOMNode> checkbox_isimpledomnode;
 855   hr = body_isimpledomnode->get_firstChild(
 856       checkbox_isimpledomnode.Receive());
 857   ASSERT_EQ(S_OK, hr);
 858   hr = checkbox_isimpledomnode->get_nodeInfo(
 859       node_name.Receive(), &name_space_id, node_value.Receive(), &num_children,
 860       &unique_id, &node_type);
 861   ASSERT_EQ(S_OK, hr);
 862   EXPECT_EQ(L"input", std::wstring(node_name, node_name.Length()));
 863   EXPECT_EQ(NODETYPE_ELEMENT, node_type);
 864   EXPECT_EQ(0, num_children);
 865 }
 866
 867 IN_PROC_BROWSER_TEST_F(AccessibilityWinBrowserTest, MAYBE(TestRoleGroup)) {
 868   LoadInitialAccessibilityTreeFromHtml(
 869       "<fieldset></fieldset><div role=group></div>");
 870
 871   // Check the browser's copy of the renderer accessibility tree.
 872   AccessibleChecker grouping1_checker(std::wstring(), ROLE_SYSTEM_GROUPING,
 873                                       std::wstring());
 874   AccessibleChecker grouping2_checker(std::wstring(), ROLE_SYSTEM_GROUPING,
 875                                       std::wstring());
 876   AccessibleChecker document_checker(std::wstring(), ROLE_SYSTEM_DOCUMENT,
 877                                      std::wstring());
 878   document_checker.AppendExpectedChild(&grouping1_checker);
 879   document_checker.AppendExpectedChild(&grouping2_checker);
 880   document_checker.CheckAccessible(GetRendererAccessible());
 881 }
 882
 883 }  // namespace content