content/browser/accessibility/site_per_process_accessibility_browsertest.cc

   1 // Copyright (c) 2014 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/command_line.h"
   6 #include "base/strings/stringprintf.h"
   7 #include "base/strings/utf_string_conversions.h"
   8 #include "content/browser/accessibility/browser_accessibility.h"
   9 #include "content/browser/accessibility/browser_accessibility_manager.h"
  10 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
  11 #include "content/browser/frame_host/cross_process_frame_connector.h"
  12 #include "content/browser/frame_host/frame_tree.h"
  13 #include "content/browser/frame_host/render_frame_proxy_host.h"
  14 #include "content/browser/frame_host/render_widget_host_view_child_frame.h"
  15 #include "content/browser/renderer_host/render_view_host_impl.h"
  16 #include "content/browser/site_per_process_browsertest.h"
  17 #include "content/browser/web_contents/web_contents_impl.h"
  18 #include "content/public/browser/notification_observer.h"
  19 #include "content/public/browser/notification_service.h"
  20 #include "content/public/browser/notification_types.h"
  21 #include "content/public/browser/web_contents_observer.h"
  22 #include "content/public/common/content_switches.h"
  23 #include "content/public/test/browser_test_utils.h"
  24 #include "content/public/test/content_browser_test.h"
  25 #include "content/public/test/content_browser_test_utils.h"
  26 #include "content/public/test/test_utils.h"
  27 #include "content/shell/browser/shell.h"
  28 #include "content/test/accessibility_browser_test_utils.h"
  29 #include "content/test/content_browser_test_utils_internal.h"
  30 #include "net/dns/mock_host_resolver.h"
  31 #include "url/gurl.h"
  32 #include "url/url_constants.h"
  33
  34 namespace content {
  35
  36 class SitePerProcessAccessibilityBrowserTest
  37     : public SitePerProcessBrowserTest {
  38  public:
  39   SitePerProcessAccessibilityBrowserTest() {}
  40 };
  41
  42 // Utility function to determine if an accessibility tree has finished loading
  43 // or if the tree represents a page that hasn't finished loading yet.
  44 bool AccessibilityTreeIsLoaded(BrowserAccessibilityManager* manager) {
  45   BrowserAccessibility* root = manager->GetRoot();
  46   return (root->GetFloatAttribute(ui::AX_ATTR_DOC_LOADING_PROGRESS) == 1.0 &&
  47           root->GetStringAttribute(ui::AX_ATTR_DOC_URL) != url::kAboutBlankURL);
  48 }
  49
  50 // Times out on Android, not clear if it's an actual bug or just slow.
  51 #if defined(OS_ANDROID)
  52 #define MAYBE_CrossSiteIframeAccessibility DISABLED_CrossSiteIframeAccessibility
  53 #else
  54 #define MAYBE_CrossSiteIframeAccessibility CrossSiteIframeAccessibility
  55 #endif
  56 IN_PROC_BROWSER_TEST_F(SitePerProcessAccessibilityBrowserTest,
  57                        MAYBE_CrossSiteIframeAccessibility) {
  58   // Enable full accessibility for all current and future WebContents.
  59   BrowserAccessibilityState::GetInstance()->EnableAccessibility();
  60
  61   AccessibilityNotificationWaiter main_frame_accessibility_waiter(
  62       shell(), AccessibilityModeComplete,
  63       ui::AX_EVENT_LOAD_COMPLETE);
  64
  65   host_resolver()->AddRule("*", "127.0.0.1");
  66   ASSERT_TRUE(test_server()->Start());
  67   GURL main_url(test_server()->GetURL("files/site_per_process_main.html"));
  68   NavigateToURL(shell(), main_url);
  69
  70   // It is safe to obtain the root frame tree node here, as it doesn't change.
  71   FrameTreeNode* root =
  72       static_cast<WebContentsImpl*>(shell()->web_contents())->
  73           GetFrameTree()->root();
  74
  75   // Load same-site page into iframe.
  76   FrameTreeNode* child = root->child_at(0);
  77   GURL http_url(test_server()->GetURL("files/title1.html"));
  78   NavigateFrameToURL(child, http_url);
  79
  80   // Load cross-site page into iframe.
  81   GURL::Replacements replace_host;
  82   GURL cross_site_url(test_server()->GetURL("files/title2.html"));
  83   replace_host.SetHostStr("foo.com");
  84   cross_site_url = cross_site_url.ReplaceComponents(replace_host);
  85   NavigateFrameToURL(root->child_at(0), cross_site_url);
  86
  87   // Ensure that we have created a new process for the subframe.
  88   ASSERT_EQ(2U, root->child_count());
  89   SiteInstance* site_instance = child->current_frame_host()->GetSiteInstance();
  90   EXPECT_NE(shell()->web_contents()->GetSiteInstance(), site_instance);
  91
  92   // Wait for the accessibility tree from the main frame to load.
  93   // Because we created the AccessibilityNotificationWaiter before accessibility
  94   // was enabled, we're guaranteed to get a LOAD_COMPLETE event.
  95   main_frame_accessibility_waiter.WaitForNotification();
  96
  97   RenderFrameHostImpl* main_frame = static_cast<RenderFrameHostImpl*>(
  98       shell()->web_contents()->GetMainFrame());
  99   BrowserAccessibilityManager* main_frame_manager =
 100       main_frame->browser_accessibility_manager();
 101   VLOG(1) << "Main frame accessibility tree:\n"
 102           << main_frame_manager->SnapshotAXTreeForTesting().ToString();
 103   EXPECT_TRUE(AccessibilityTreeIsLoaded(main_frame_manager));
 104
 105   // Next, wait for the accessibility tree from the cross-process iframe
 106   // to load. Since accessibility was enabled at the time this frame was
 107   // created, we need to check to see if it's already loaded first, and
 108   // only create an AccessibilityNotificationWaiter if it's not.
 109   RenderFrameHostImpl* child_frame = static_cast<RenderFrameHostImpl*>(
 110       child->current_frame_host());
 111   BrowserAccessibilityManager* child_frame_manager =
 112       child_frame->browser_accessibility_manager();
 113   if (!AccessibilityTreeIsLoaded(child_frame_manager)) {
 114     VLOG(1) << "Child frame accessibility tree is not loaded, waiting...";
 115     AccessibilityNotificationWaiter child_frame_accessibility_waiter(
 116         child_frame, ui::AX_EVENT_LOAD_COMPLETE);
 117     child_frame_accessibility_waiter.WaitForNotification();
 118   }
 119   EXPECT_TRUE(AccessibilityTreeIsLoaded(child_frame_manager));
 120   VLOG(1) << "Child frame accessibility tree:\n"
 121           << child_frame_manager->SnapshotAXTreeForTesting().ToString();
 122
 123   // Assert that we can walk from the main frame down into the child frame
 124   // directly, getting correct roles and data along the way.
 125   BrowserAccessibility* ax_root = main_frame_manager->GetRoot();
 126   EXPECT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, ax_root->GetRole());
 127   ASSERT_EQ(1U, ax_root->PlatformChildCount());
 128
 129   BrowserAccessibility* ax_group = ax_root->PlatformGetChild(0);
 130   EXPECT_EQ(ui::AX_ROLE_GROUP, ax_group->GetRole());
 131   ASSERT_EQ(2U, ax_group->PlatformChildCount());
 132
 133   BrowserAccessibility* ax_iframe = ax_group->PlatformGetChild(0);
 134   EXPECT_EQ(ui::AX_ROLE_IFRAME, ax_iframe->GetRole());
 135   ASSERT_EQ(1U, ax_iframe->PlatformChildCount());
 136
 137   BrowserAccessibility* ax_scroll_area = ax_iframe->PlatformGetChild(0);
 138   EXPECT_EQ(ui::AX_ROLE_SCROLL_AREA, ax_scroll_area->GetRole());
 139   ASSERT_EQ(1U, ax_scroll_area->PlatformChildCount());
 140
 141   BrowserAccessibility* ax_child_frame_root =
 142       ax_scroll_area->PlatformGetChild(0);
 143   EXPECT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, ax_child_frame_root->GetRole());
 144   ASSERT_EQ(1U, ax_child_frame_root->PlatformChildCount());
 145   EXPECT_EQ("Title Of Awesomeness",
 146             ax_child_frame_root->GetStringAttribute(ui::AX_ATTR_NAME));
 147
 148   BrowserAccessibility* ax_child_frame_group =
 149       ax_child_frame_root->PlatformGetChild(0);
 150   EXPECT_EQ(ui::AX_ROLE_GROUP, ax_child_frame_group->GetRole());
 151   ASSERT_EQ(1U, ax_child_frame_group->PlatformChildCount());
 152
 153   BrowserAccessibility* ax_child_frame_static_text =
 154       ax_child_frame_group->PlatformGetChild(0);
 155   EXPECT_EQ(ui::AX_ROLE_STATIC_TEXT, ax_child_frame_static_text->GetRole());
 156   ASSERT_EQ(0U, ax_child_frame_static_text->PlatformChildCount());
 157
 158   // Last, check that the parent of the child frame root is correct.
 159   EXPECT_EQ(ax_child_frame_root->GetParent(), ax_scroll_area);
 160 }
 161
 162 }  // namespace content