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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stddef.h>
#include <optional>
#include "build/build_config.h"
#include "content/browser/renderer_host/render_frame_host_impl.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/public/test/accessibility_notification_waiter.h"
#include "content/public/test/browser_test.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/public/test/scoped_accessibility_mode_override.h"
#include "content/shell/browser/shell.h"
#include "ui/accessibility/ax_common.h"
#include "ui/accessibility/ax_node.h"
#include "ui/accessibility/ax_tree.h"
#include "ui/accessibility/ax_updates_and_events.h"
namespace content {
class AccessibilityIpcErrorBrowserTest : public ContentBrowserTest {
public:
AccessibilityIpcErrorBrowserTest() {}
AccessibilityIpcErrorBrowserTest(const AccessibilityIpcErrorBrowserTest&) =
delete;
AccessibilityIpcErrorBrowserTest& operator=(
const AccessibilityIpcErrorBrowserTest&) = delete;
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 ax::mojom::StringAttribute attr) {
for (const auto& attribute_pair : node->GetStringAttributes()) {
if (attribute_pair.first == attr) {
return attribute_pair.second;
}
}
return std::string();
}
};
// Failed on Android x86 in crbug.com/1123641.
// Do not test on AX_FAIL_FAST_BUILDS, where the BAD IPC will simply assert.
#if (BUILDFLAG(IS_ANDROID) && defined(ARCH_CPU_X86)) || AX_FAIL_FAST_BUILD()
#define MAYBE_UnrecoverableAccessibilityErrorDisallowReenabling \
DISABLED_UnrecoverableAccessibilityErrorDisallowReenabling
#else
#define MAYBE_UnrecoverableAccessibilityErrorDisallowReenabling \
UnrecoverableAccessibilityErrorDisallowReenabling
#endif
IN_PROC_BROWSER_TEST_F(
AccessibilityIpcErrorBrowserTest,
MAYBE_UnrecoverableAccessibilityErrorDisallowReenabling) {
// 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);
EXPECT_TRUE(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()->GetPrimaryMainFrame());
frame->set_no_create_browser_accessibility_manager_for_testing(true);
ASSERT_EQ(nullptr, frame->GetOrCreateBrowserAccessibilityManager());
// Enable accessibility and wait for the first event.
std::optional<ScopedAccessibilityModeOverride> basic_mode;
{
AccessibilityNotificationWaiter waiter(shell()->web_contents(),
ax::mojom::Event::kLoadComplete);
basic_mode.emplace(ui::kAXModeBasic);
ASSERT_TRUE(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());
// Verify the current mode.
EXPECT_EQ(ui::kAXModeBasic, shell()->web_contents()->GetAccessibilityMode());
// 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()->web_contents());
ASSERT_TRUE(ExecJs(
shell(), "document.getElementById('p1').style.display = 'none';"));
ASSERT_TRUE(waiter.WaitForNotification());
}
// Show that accessibility was reset because the frame doesn't have a
// BrowserAccessibilityManager anymore.
ASSERT_EQ(nullptr, frame->browser_accessibility_manager());
// Accessibility suffered a fatal error so we intentionally disallow
// re-enablement.
content::WebContentsImpl* impl =
static_cast<content::WebContentsImpl*>(shell()->web_contents());
EXPECT_TRUE(impl->GetAccessibilityMode().is_mode_off());
ScopedAccessibilityModeOverride override(impl, ui::kAXModeComplete);
EXPECT_TRUE(impl->GetAccessibilityMode().is_mode_off());
}
} // namespace content
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