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/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 // Times out on Android, not clear if it's an actual bug or just slow.
  50 #if defined(OS_ANDROID)
  51 #define MAYBE_CrossSiteIframeAccessibility DISABLED_CrossSiteIframeAccessibility
  52 #else
  53 #define MAYBE_CrossSiteIframeAccessibility CrossSiteIframeAccessibility
  54 #endif
  55 IN_PROC_BROWSER_TEST_F(SitePerProcessAccessibilityBrowserTest,
  56                        MAYBE_CrossSiteIframeAccessibility) {
  57   // Enable full accessibility for all current and future WebContents.
  58   BrowserAccessibilityState::GetInstance()->EnableAccessibility();
  59
  60   host_resolver()->AddRule("*", "127.0.0.1");
  61   ASSERT_TRUE(test_server()->Start());
  62   GURL main_url(test_server()->GetURL("files/site_per_process_main.html"));
  63   NavigateToURL(shell(), main_url);
  64
  65   // It is safe to obtain the root frame tree node here, as it doesn't change.
  66   FrameTreeNode* root =
  67       static_cast<WebContentsImpl*>(shell()->web_contents())->
  68           GetFrameTree()->root();
  69
  70   // Load same-site page into iframe.
  71   FrameTreeNode* child = root->child_at(0);
  72   GURL http_url(test_server()->GetURL("files/title1.html"));
  73   NavigateFrameToURL(child, http_url);
  74
  75   // Load cross-site page into iframe.
  76   RenderFrameHostImpl* child_rfh =
  77       child->render_manager()->current_frame_host();
  78   RenderFrameDeletedObserver deleted_observer(child_rfh);
  79   GURL::Replacements replace_host;
  80   GURL cross_site_url(test_server()->GetURL("files/title2.html"));
  81   replace_host.SetHostStr("foo.com");
  82   cross_site_url = cross_site_url.ReplaceComponents(replace_host);
  83   NavigateFrameToURL(root->child_at(0), cross_site_url);
  84
  85   // Ensure that we have created a new process for the subframe.
  86   ASSERT_EQ(2U, root->child_count());
  87   SiteInstance* site_instance = child->current_frame_host()->GetSiteInstance();
  88   EXPECT_NE(shell()->web_contents()->GetSiteInstance(), site_instance);
  89
  90   // Wait until the iframe completes the swap.
  91   deleted_observer.WaitUntilDeleted();
  92
  93   RenderFrameHostImpl* main_frame = static_cast<RenderFrameHostImpl*>(
  94       shell()->web_contents()->GetMainFrame());
  95   BrowserAccessibilityManager* main_frame_manager =
  96       main_frame->browser_accessibility_manager();
  97   VLOG(1) << "Main frame accessibility tree:\n"
  98           << main_frame_manager->SnapshotAXTreeForTesting().ToString();
  99   EXPECT_TRUE(AccessibilityTreeIsLoaded(main_frame_manager));
 100
 101   // Next, wait for the accessibility tree from the cross-process iframe
 102   // to load. Since accessibility was enabled at the time this frame was
 103   // created, we need to check to see if it's already loaded first, and
 104   // only create an AccessibilityNotificationWaiter if it's not.
 105   RenderFrameHostImpl* child_frame = static_cast<RenderFrameHostImpl*>(
 106       child->current_frame_host());
 107   BrowserAccessibilityManager* child_frame_manager =
 108       child_frame->browser_accessibility_manager();
 109   if (!AccessibilityTreeIsLoaded(child_frame_manager)) {
 110     VLOG(1) << "Child frame accessibility tree is not loaded, waiting...";
 111     AccessibilityNotificationWaiter child_frame_accessibility_waiter(
 112         child_frame, ui::AX_EVENT_LOAD_COMPLETE);
 113     child_frame_accessibility_waiter.WaitForNotification();
 114   }
 115   EXPECT_TRUE(AccessibilityTreeIsLoaded(child_frame_manager));
 116   VLOG(1) << "Child frame accessibility tree:\n"
 117           << child_frame_manager->SnapshotAXTreeForTesting().ToString();
 118
 119   // Assert that we can walk from the main frame down into the child frame
 120   // directly, getting correct roles and data along the way.
 121   BrowserAccessibility* ax_root = main_frame_manager->GetRoot();
 122   EXPECT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, ax_root->GetRole());
 123   ASSERT_EQ(1U, ax_root->PlatformChildCount());
 124
 125   BrowserAccessibility* ax_group = ax_root->PlatformGetChild(0);
 126   EXPECT_EQ(ui::AX_ROLE_GROUP, ax_group->GetRole());
 127   ASSERT_EQ(2U, ax_group->PlatformChildCount());
 128
 129   BrowserAccessibility* ax_iframe = ax_group->PlatformGetChild(0);
 130   EXPECT_EQ(ui::AX_ROLE_IFRAME, ax_iframe->GetRole());
 131   ASSERT_EQ(1U, ax_iframe->PlatformChildCount());
 132
 133   BrowserAccessibility* ax_child_frame_root = ax_iframe->PlatformGetChild(0);
 134   EXPECT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, ax_child_frame_root->GetRole());
 135   ASSERT_EQ(1U, ax_child_frame_root->PlatformChildCount());
 136   EXPECT_EQ("Title Of Awesomeness",
 137             ax_child_frame_root->GetStringAttribute(ui::AX_ATTR_NAME));
 138
 139   BrowserAccessibility* ax_child_frame_group =
 140       ax_child_frame_root->PlatformGetChild(0);
 141   EXPECT_EQ(ui::AX_ROLE_GROUP, ax_child_frame_group->GetRole());
 142   ASSERT_EQ(1U, ax_child_frame_group->PlatformChildCount());
 143
 144   BrowserAccessibility* ax_child_frame_static_text =
 145       ax_child_frame_group->PlatformGetChild(0);
 146   EXPECT_EQ(ui::AX_ROLE_STATIC_TEXT, ax_child_frame_static_text->GetRole());
 147   ASSERT_EQ(0U, ax_child_frame_static_text->PlatformChildCount());
 148
 149   // Last, check that the parent of the child frame root is correct.
 150   EXPECT_EQ(ax_child_frame_root->GetParent(), ax_iframe);
 151 }
 152
 153 }  // namespace content