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// Copyright (c) 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/frame_host/render_frame_host_impl.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/common/accessibility_messages.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/content_browser_test.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/shell/browser/shell.h"
#include "content/test/accessibility_browser_test_utils.h"
#include "ui/accessibility/ax_node.h"
#include "ui/accessibility/ax_tree.h"
namespace content {
class AccessibilityIpcErrorBrowserTest : public ContentBrowserTest {
public:
AccessibilityIpcErrorBrowserTest() {}
protected:
// Convenience method to get the value of a particular AXNode
// attribute as a UTF-8 string.
std::string GetAttr(const ui::AXNode* node,
const ui::AXStringAttribute attr) {
const ui::AXNodeData& data = node->data();
for (size_t i = 0; i < data.string_attributes.size(); ++i) {
if (data.string_attributes[i].first == attr)
return data.string_attributes[i].second;
}
return std::string();
}
DISALLOW_COPY_AND_ASSIGN(AccessibilityIpcErrorBrowserTest);
};
IN_PROC_BROWSER_TEST_F(AccessibilityIpcErrorBrowserTest,
ResetBrowserAccessibilityManager) {
// Create a data url and load it.
const char url_str[] =
"data:text/html,"
"<div aria-live='polite'>"
" <p id='p1'>Paragraph One</p>"
" <p id='p2'>Paragraph Two</p>"
"</div>"
"<button id='button'>Button</button>";
GURL url(url_str);
NavigateToURL(shell(), url);
// Simulate a condition where the RFH can't create a
// BrowserAccessibilityManager - like if there's no view.
RenderFrameHostImpl* frame = static_cast<RenderFrameHostImpl*>(
shell()->web_contents()->GetMainFrame());
frame->set_no_create_browser_accessibility_manager_for_testing(true);
ASSERT_EQ(nullptr, frame->GetOrCreateBrowserAccessibilityManager());
{
// Enable accessibility (passing AccessibilityModeComplete to
// AccessibilityNotificationWaiter does this automatically) and wait for
// the first event.
AccessibilityNotificationWaiter waiter(
shell(), AccessibilityModeComplete, ui::AX_EVENT_LAYOUT_COMPLETE);
waiter.WaitForNotification();
}
// Make sure we still didn't create a BrowserAccessibilityManager.
// This means that at least one accessibility IPC was lost.
ASSERT_EQ(nullptr, frame->GetOrCreateBrowserAccessibilityManager());
// Now create a BrowserAccessibilityManager, simulating what would happen
// if the RFH's view is created now - but then disallow recreating the
// BrowserAccessibilityManager so that we can test that this one gets
// destroyed.
frame->set_no_create_browser_accessibility_manager_for_testing(false);
ASSERT_TRUE(frame->GetOrCreateBrowserAccessibilityManager() != nullptr);
frame->set_no_create_browser_accessibility_manager_for_testing(true);
{
// Hide one of the elements on the page, and wait for an accessibility
// notification triggered by the hide.
AccessibilityNotificationWaiter waiter(
shell(), AccessibilityModeComplete, ui::AX_EVENT_LIVE_REGION_CHANGED);
ASSERT_TRUE(ExecuteScript(
shell()->web_contents(),
"document.getElementById('p1').style.display = 'none';"));
waiter.WaitForNotification();
}
// Show that accessibility was reset because the frame doesn't have a
// BrowserAccessibilityManager anymore.
ASSERT_EQ(nullptr, frame->browser_accessibility_manager());
// Finally, allow creating a new accessibility manager and
// ensure that we didn't kill the renderer; we can still send it messages.
frame->set_no_create_browser_accessibility_manager_for_testing(false);
const ui::AXTree* tree = nullptr;
{
AccessibilityNotificationWaiter waiter(
shell(), AccessibilityModeComplete, ui::AX_EVENT_FOCUS);
ASSERT_TRUE(ExecuteScript(
shell()->web_contents(),
"document.getElementById('button').focus();"));
waiter.WaitForNotification();
tree = &waiter.GetAXTree();
}
// Get the accessibility tree, ensure it reflects the final state of the
// document.
const ui::AXNode* root = tree->GetRoot();
// Use this for debugging if the test fails.
VLOG(1) << tree->ToString();
EXPECT_EQ(ui::AX_ROLE_ROOT_WEB_AREA, root->data().role);
ASSERT_EQ(2, root->child_count());
const ui::AXNode* live_region = root->ChildAtIndex(0);
ASSERT_EQ(1, live_region->child_count());
EXPECT_EQ(ui::AX_ROLE_DIV, live_region->data().role);
const ui::AXNode* para = live_region->ChildAtIndex(0);
EXPECT_EQ(ui::AX_ROLE_PARAGRAPH, para->data().role);
const ui::AXNode* button_container = root->ChildAtIndex(1);
EXPECT_EQ(ui::AX_ROLE_GROUP, button_container->data().role);
ASSERT_EQ(1, button_container->child_count());
const ui::AXNode* button = button_container->ChildAtIndex(0);
EXPECT_EQ(ui::AX_ROLE_BUTTON, button->data().role);
EXPECT_TRUE(button->data().state >> ui::AX_STATE_FOCUSED & 1);
}
IN_PROC_BROWSER_TEST_F(AccessibilityIpcErrorBrowserTest,
MultipleBadAccessibilityIPCsKillsRenderer) {
// Create a data url and load it.
const char url_str[] =
"data:text/html,"
"<button id='button'>Button</button>";
GURL url(url_str);
NavigateToURL(shell(), url);
RenderFrameHostImpl* frame = static_cast<RenderFrameHostImpl*>(
shell()->web_contents()->GetMainFrame());
{
// Enable accessibility (passing AccessibilityModeComplete to
// AccessibilityNotificationWaiter does this automatically) and wait for
// the first event.
AccessibilityNotificationWaiter waiter(
shell(), AccessibilityModeComplete, ui::AX_EVENT_LAYOUT_COMPLETE);
waiter.WaitForNotification();
}
// Construct a bad accessibility message that BrowserAccessibilityManager
// will reject.
std::vector<AccessibilityHostMsg_EventParams> bad_accessibility_event_list;
bad_accessibility_event_list.push_back(AccessibilityHostMsg_EventParams());
bad_accessibility_event_list[0].update.node_id_to_clear = -2;
// We should be able to reset accessibility |max_iterations-1| times
// (see render_frame_host_impl.cc - kMaxAccessibilityResets),
// but the subsequent time the renderer should be killed.
int max_iterations = RenderFrameHostImpl::kMaxAccessibilityResets;
for (int iteration = 0; iteration < max_iterations; iteration++) {
// Send the browser accessibility the bad message.
BrowserAccessibilityManager* manager =
frame->GetOrCreateBrowserAccessibilityManager();
manager->OnAccessibilityEvents(bad_accessibility_event_list);
// Now the frame should have deleted the BrowserAccessibilityManager.
ASSERT_EQ(nullptr, frame->browser_accessibility_manager());
if (iteration == max_iterations - 1)
break;
AccessibilityNotificationWaiter waiter(
shell(), AccessibilityModeComplete, ui::AX_EVENT_LAYOUT_COMPLETE);
waiter.WaitForNotification();
}
// Wait for the renderer to be killed.
if (frame->IsRenderFrameLive()) {
RenderProcessHostWatcher render_process_watcher(
frame->GetProcess(), RenderProcessHostWatcher::WATCH_FOR_PROCESS_EXIT);
render_process_watcher.Wait();
}
ASSERT_FALSE(frame->IsRenderFrameLive());
}
} // namespace content
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