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 "content/browser/accessibility/browser_accessibility.h"
   8 #include "content/browser/accessibility/browser_accessibility_manager.h"
   9 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
  10 #include "content/browser/frame_host/cross_process_frame_connector.h"
  11 #include "content/browser/frame_host/frame_tree.h"
  12 #include "content/browser/frame_host/render_frame_proxy_host.h"
  13 #include "content/browser/frame_host/render_widget_host_view_child_frame.h"
  14 #include "content/browser/renderer_host/render_view_host_impl.h"
  15 #include "content/browser/site_per_process_browsertest.h"
  16 #include "content/browser/web_contents/web_contents_impl.h"
  17 #include "content/public/browser/notification_observer.h"
  18 #include "content/public/browser/notification_service.h"
  19 #include "content/public/browser/notification_types.h"
  20 #include "content/public/browser/web_contents_observer.h"
  21 #include "content/public/common/content_switches.h"
  22 #include "content/public/test/browser_test_utils.h"
  23 #include "content/public/test/content_browser_test.h"
  24 #include "content/public/test/content_browser_test_utils.h"
  25 #include "content/public/test/test_utils.h"
  26 #include "content/shell/browser/shell.h"
  27 #include "content/test/accessibility_browser_test_utils.h"
  28 #include "content/test/content_browser_test_utils_internal.h"
  29 #include "net/dns/mock_host_resolver.h"
  30 #include "url/gurl.h"
  31 #include "url/url_constants.h"
  32
  33 namespace content {
  34
  35 class SitePerProcessAccessibilityBrowserTest
  36     : public SitePerProcessBrowserTest {
  37  public:
  38   SitePerProcessAccessibilityBrowserTest() {}
  39 };
  40
  41 // Utility function to determine if an accessibility tree has finished loading
  42 // or if the tree represents a page that hasn't finished loading yet.
  43 bool AccessibilityTreeIsLoaded(BrowserAccessibilityManager* manager) {
  44   BrowserAccessibility* root = manager->GetRoot();
  45   return (root->GetFloatAttribute(ui::AX_ATTR_DOC_LOADING_PROGRESS) == 1.0 &&
  46           root->GetStringAttribute(ui::AX_ATTR_DOC_URL) != url::kAboutBlankURL);
  47 }
  48
  49 // TODO(nasko): try enabling this test on more platforms once
  50 // SitePerProcessBrowserTest.CrossSiteIframe is enabled everywhere.
  51 // http://crbug.com/399775
  52 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
  53 #define MAYBE_CrossSiteIframeAccessibility CrossSiteIframeAccessibility
  54 #else
  55 #define MAYBE_CrossSiteIframeAccessibility DISABLED_CrossSiteIframeAccessibility
  56 #endif
  57 IN_PROC_BROWSER_TEST_F(SitePerProcessAccessibilityBrowserTest,
  58                        MAYBE_CrossSiteIframeAccessibility) {
  59   // Enable full accessibility for all current and future WebContents.
  60   BrowserAccessibilityState::GetInstance()->EnableAccessibility();
  61
  62   AccessibilityNotificationWaiter main_frame_accessibility_waiter(
  63       shell(), AccessibilityModeComplete,
  64       ui::AX_EVENT_LOAD_COMPLETE);
  65
  66   host_resolver()->AddRule("*", "127.0.0.1");
  67   ASSERT_TRUE(test_server()->Start());
  68   GURL main_url(test_server()->GetURL("files/site_per_process_main.html"));
  69   NavigateToURL(shell(), main_url);
  70
  71   // It is safe to obtain the root frame tree node here, as it doesn't change.
  72   FrameTreeNode* root =
  73       static_cast<WebContentsImpl*>(shell()->web_contents())->
  74           GetFrameTree()->root();
  75
  76   // Load same-site page into iframe.
  77   FrameTreeNode* child = root->child_at(0);
  78   GURL http_url(test_server()->GetURL("files/title1.html"));
  79   NavigateFrameToURL(child, http_url);
  80
  81   // These must stay in scope with replace_host.
  82   GURL::Replacements replace_host;
  83   std::string foo_com("foo.com");
  84
  85   // Load cross-site page into iframe.
  86   GURL cross_site_url(test_server()->GetURL("files/title2.html"));
  87   replace_host.SetHostStr(foo_com);
  88   cross_site_url = cross_site_url.ReplaceComponents(replace_host);
  89   NavigateFrameToURL(root->child_at(0), cross_site_url);
  90
  91   // Ensure that we have created a new process for the subframe.
  92   ASSERT_EQ(2U, root->child_count());
  93   SiteInstance* site_instance = child->current_frame_host()->GetSiteInstance();
  94   EXPECT_NE(shell()->web_contents()->GetSiteInstance(), site_instance);
  95
  96   // Wait for the accessibility tree from the main frame to load.
  97   // Because we created the AccessibilityNotificationWaiter before accessibility
  98   // was enabled, we're guaranteed to get a LOAD_COMPLETE event.
  99   main_frame_accessibility_waiter.WaitForNotification();
 100
 101   RenderFrameHostImpl* main_frame = static_cast<RenderFrameHostImpl*>(
 102       shell()->web_contents()->GetMainFrame());
 103   BrowserAccessibilityManager* main_frame_manager =
 104       main_frame->browser_accessibility_manager();
 105   VLOG(1) << "Main frame accessibility tree:\n"
 106           << main_frame_manager->SnapshotAXTreeForTesting().ToString();
 107   EXPECT_TRUE(AccessibilityTreeIsLoaded(main_frame_manager));
 108
 109   // Next, wait for the accessibility tree from the cross-process iframe
 110   // to load. Since accessibility was enabled at the time this frame was
 111   // created, we need to check to see if it's already loaded first, and
 112   // only create an AccessibilityNotificationWaiter if it's not.
 113   RenderFrameHostImpl* child_frame = static_cast<RenderFrameHostImpl*>(
 114       child->current_frame_host());
 115   BrowserAccessibilityManager* child_frame_manager =
 116       child_frame->browser_accessibility_manager();
 117   if (!AccessibilityTreeIsLoaded(child_frame_manager)) {
 118     VLOG(1) << "Child frame accessibility tree is not loaded, waiting...";
 119     AccessibilityNotificationWaiter child_frame_accessibility_waiter(
 120         child_frame, ui::AX_EVENT_LOAD_COMPLETE);
 121     child_frame_accessibility_waiter.WaitForNotification();
 122   }
 123   EXPECT_TRUE(AccessibilityTreeIsLoaded(child_frame_manager));
 124   VLOG(1) << "Child frame accessibility tree:\n"
 125           << child_frame_manager->SnapshotAXTreeForTesting().ToString();
 126
 127   // Assert that we can walk from the main frame down into the child frame
 128   // directly, getting correct roles and data along the way.
 129   BrowserAccessibility* ax_root = main_frame_manager->GetRoot();
 130   EXPECT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, ax_root->GetRole());
 131   ASSERT_EQ(1U, ax_root->PlatformChildCount());
 132
 133   BrowserAccessibility* ax_group = ax_root->PlatformGetChild(0);
 134   EXPECT_EQ(ui::AX_ROLE_GROUP, ax_group->GetRole());
 135   ASSERT_EQ(2U, ax_group->PlatformChildCount());
 136
 137   BrowserAccessibility* ax_iframe = ax_group->PlatformGetChild(0);
 138   EXPECT_EQ(ui::AX_ROLE_IFRAME, ax_iframe->GetRole());
 139   ASSERT_EQ(1U, ax_iframe->PlatformChildCount());
 140
 141   BrowserAccessibility* ax_scroll_area = ax_iframe->PlatformGetChild(0);
 142   EXPECT_EQ(ui::AX_ROLE_SCROLL_AREA, ax_scroll_area->GetRole());
 143   ASSERT_EQ(1U, ax_scroll_area->PlatformChildCount());
 144
 145   BrowserAccessibility* ax_child_frame_root =
 146       ax_scroll_area->PlatformGetChild(0);
 147   EXPECT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, ax_child_frame_root->GetRole());
 148   ASSERT_EQ(1U, ax_child_frame_root->PlatformChildCount());
 149   EXPECT_EQ("Title Of Awesomeness", ax_child_frame_root->name());
 150
 151   BrowserAccessibility* ax_child_frame_group =
 152       ax_child_frame_root->PlatformGetChild(0);
 153   EXPECT_EQ(ui::AX_ROLE_GROUP, ax_child_frame_group->GetRole());
 154   ASSERT_EQ(1U, ax_child_frame_group->PlatformChildCount());
 155
 156   BrowserAccessibility* ax_child_frame_static_text =
 157       ax_child_frame_group->PlatformGetChild(0);
 158   EXPECT_EQ(ui::AX_ROLE_STATIC_TEXT, ax_child_frame_static_text->GetRole());
 159   ASSERT_EQ(0U, ax_child_frame_static_text->PlatformChildCount());
 160
 161   // Last, check that the parent of the child frame root is correct.
 162   EXPECT_EQ(ax_child_frame_root->GetParent(), ax_scroll_area);
 163 }
 164
 165 }  // namespace content