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      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 
     32 namespace content {
     33 
     34 class SitePerProcessAccessibilityBrowserTest
     35     : public SitePerProcessBrowserTest {
     36  public:
     37   SitePerProcessAccessibilityBrowserTest() {}
     38 };
     39 
     40 // TODO(nasko): try enabling this test on more platforms once
     41 // SitePerProcessBrowserTest.CrossSiteIframe is enabled everywhere.
     42 // http://crbug.com/399775
     43 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
     44 #define MAYBE_CrossSiteIframeAccessibility CrossSiteIframeAccessibility
     45 #else
     46 #define MAYBE_CrossSiteIframeAccessibility DISABLED_CrossSiteIframeAccessibility
     47 #endif
     48 IN_PROC_BROWSER_TEST_F(SitePerProcessAccessibilityBrowserTest,
     49                        MAYBE_CrossSiteIframeAccessibility) {
     50   // Enable full accessibility for all current and future WebContents.
     51   BrowserAccessibilityState::GetInstance()->EnableAccessibility();
     52 
     53   AccessibilityNotificationWaiter main_frame_accessibility_waiter(
     54       shell(), AccessibilityModeComplete,
     55       ui::AX_EVENT_LOAD_COMPLETE);
     56 
     57   host_resolver()->AddRule("*", "127.0.0.1");
     58   ASSERT_TRUE(test_server()->Start());
     59   GURL main_url(test_server()->GetURL("files/site_per_process_main.html"));
     60   NavigateToURL(shell(), main_url);
     61 
     62   // It is safe to obtain the root frame tree node here, as it doesn't change.
     63   FrameTreeNode* root =
     64       static_cast<WebContentsImpl*>(shell()->web_contents())->
     65           GetFrameTree()->root();
     66 
     67   // Load same-site page into iframe.
     68   FrameTreeNode* child = root->child_at(0);
     69   GURL http_url(test_server()->GetURL("files/title1.html"));
     70   NavigateFrameToURL(child, http_url);
     71 
     72   // These must stay in scope with replace_host.
     73   GURL::Replacements replace_host;
     74   std::string foo_com("foo.com");
     75 
     76   // Load cross-site page into iframe.
     77   GURL cross_site_url(test_server()->GetURL("files/title2.html"));
     78   replace_host.SetHostStr(foo_com);
     79   cross_site_url = cross_site_url.ReplaceComponents(replace_host);
     80   NavigateFrameToURL(root->child_at(0), cross_site_url);
     81 
     82   // Ensure that we have created a new process for the subframe.
     83   ASSERT_EQ(1U, root->child_count());
     84   SiteInstance* site_instance = child->current_frame_host()->GetSiteInstance();
     85   EXPECT_NE(shell()->web_contents()->GetSiteInstance(), site_instance);
     86 
     87   // Wait until the accessibility tree from both the main frame and
     88   // cross-process iframe load.
     89   RenderFrameHostImpl* child_frame = static_cast<RenderFrameHostImpl*>(
     90       child->current_frame_host());
     91   AccessibilityNotificationWaiter child_frame_accessibility_waiter(
     92       child_frame, ui::AX_EVENT_NONE);
     93   main_frame_accessibility_waiter.WaitForNotification();
     94   child_frame_accessibility_waiter.WaitForNotification();
     95 
     96   RenderFrameHostImpl* main_frame = static_cast<RenderFrameHostImpl*>(
     97       shell()->web_contents()->GetMainFrame());
     98   BrowserAccessibilityManager* main_frame_manager =
     99       main_frame->browser_accessibility_manager();
    100   VLOG(1) << "Main frame accessibility tree:\n"
    101           << main_frame_manager->SnapshotAXTreeForTesting().ToString();
    102 
    103   BrowserAccessibilityManager* child_frame_manager =
    104       child_frame->browser_accessibility_manager();
    105   VLOG(1) << "Child frame accessibility tree:\n"
    106           << child_frame_manager->SnapshotAXTreeForTesting().ToString();
    107 
    108   // Assert that we can walk from the main frame down into the child frame
    109   // directly, getting correct roles and data along the way.
    110   BrowserAccessibility* ax_root = main_frame_manager->GetRoot();
    111   ASSERT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, ax_root->GetRole());
    112   ASSERT_EQ(1U, ax_root->PlatformChildCount());
    113 
    114   BrowserAccessibility* ax_group = ax_root->PlatformGetChild(0);
    115   ASSERT_EQ(ui::AX_ROLE_GROUP, ax_group->GetRole());
    116   ASSERT_EQ(1U, ax_group->PlatformChildCount());
    117 
    118   BrowserAccessibility* ax_iframe = ax_group->PlatformGetChild(0);
    119   ASSERT_EQ(ui::AX_ROLE_IFRAME, ax_iframe->GetRole());
    120   ASSERT_EQ(1U, ax_iframe->PlatformChildCount());
    121 
    122   BrowserAccessibility* ax_scroll_area = ax_iframe->PlatformGetChild(0);
    123   ASSERT_EQ(ui::AX_ROLE_SCROLL_AREA, ax_scroll_area->GetRole());
    124   ASSERT_EQ(1U, ax_scroll_area->PlatformChildCount());
    125 
    126   BrowserAccessibility* ax_child_frame_root =
    127       ax_scroll_area->PlatformGetChild(0);
    128   ASSERT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, ax_child_frame_root->GetRole());
    129   ASSERT_EQ(1U, ax_child_frame_root->PlatformChildCount());
    130   ASSERT_EQ("Title Of Awesomeness", ax_child_frame_root->name());
    131 
    132   BrowserAccessibility* ax_child_frame_group =
    133       ax_child_frame_root->PlatformGetChild(0);
    134   ASSERT_EQ(ui::AX_ROLE_GROUP, ax_child_frame_group->GetRole());
    135   ASSERT_EQ(1U, ax_child_frame_group->PlatformChildCount());
    136 
    137   BrowserAccessibility* ax_child_frame_static_text =
    138       ax_child_frame_group->PlatformGetChild(0);
    139   ASSERT_EQ(ui::AX_ROLE_STATIC_TEXT, ax_child_frame_static_text->GetRole());
    140   ASSERT_EQ(0U, ax_child_frame_static_text->PlatformChildCount());
    141 
    142   // Last, check that the parent of the child frame root is correct.
    143   ASSERT_EQ(ax_child_frame_root->GetParent(), ax_scroll_area);
    144 }
    145 
    146 }  // namespace content
    147