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content / renderer / accessibility / render_accessibility_impl_browsertest.cc [blame]
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/renderer/accessibility/render_accessibility_impl.h"
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/containers/adapters.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/scoped_feature_list.h"
#include "content/public/renderer/plugin_ax_tree_action_target_adapter.h"
#include "content/renderer/accessibility/ax_action_target_factory.h"
#include "content/renderer/accessibility/render_accessibility_impl_test.h"
#include "content/renderer/render_frame_impl.h"
#include "services/metrics/public/cpp/mojo_ukm_recorder.h"
#include "services/metrics/public/mojom/ukm_interface.mojom.h"
#include "third_party/blink/public/web/web_testing_support.h"
#include "third_party/blink/public/web/web_view.h"
#include "ui/accessibility/ax_action_target.h"
#include "ui/accessibility/ax_location_and_scroll_updates.h"
#include "ui/accessibility/ax_tree.h"
#include "ui/accessibility/null_ax_action_target.h"
#include "ui/native_theme/native_theme_features.h"
namespace content {
using blink::WebAXObject;
using blink::WebDocument;
TEST_F(RenderAccessibilityImplTest, SendFullAccessibilityTreeOnReload) {
// The job of RenderAccessibilityImpl is to serialize the
// accessibility tree built by WebKit and send it to the browser.
// When the accessibility tree changes, it tries to send only
// the nodes that actually changed or were reparented. This test
// ensures that the messages sent are correct in cases when a page
// reloads, and that internal state is properly garbage-collected.
constexpr char html[] = R"HTML(
<body>
<div role="group" id="A">
<div role="group" id="A1"></div>
<div role="group" id="A2"></div>
</div>
</body>
)HTML";
LoadHTMLAndRefreshAccessibilityTree(html);
EXPECT_EQ(6, CountAccessibilityNodesSentToBrowser());
// If we post another event but the tree doesn't change,
// we should only send 1 node to the browser.
ClearHandledUpdates();
WebDocument document = GetMainFrame()->GetDocument();
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
GetRenderAccessibilityImpl()->MarkWebAXObjectDirty(root_obj);
SendPendingAccessibilityEvents();
EXPECT_EQ(1, CountAccessibilityNodesSentToBrowser());
{
// Make sure it's the root object that was updated.
ui::AXTreeUpdate update = GetLastAccUpdate();
EXPECT_EQ(root_obj.AxID(), update.nodes[0].id);
}
// If we reload the page and send a event, we should send
// all 5 nodes to the browser. Also double-check that we didn't
// leak any of the old BrowserTreeNodes.
LoadHTML(html);
document = GetMainFrame()->GetDocument();
root_obj = WebAXObject::FromWebDocument(document);
ClearHandledUpdates();
SendPendingAccessibilityEvents();
EXPECT_EQ(6, CountAccessibilityNodesSentToBrowser());
// Even if the first event is sent on an element other than
// the root, the whole tree should be updated because we know
// the browser doesn't have the root element.
// When the entire page is reloaded like this, all of the nodes are sent.
LoadHTML(html);
document = GetMainFrame()->GetDocument();
root_obj = WebAXObject::FromWebDocument(document);
SendPendingAccessibilityEvents();
EXPECT_EQ(6, CountAccessibilityNodesSentToBrowser());
ClearHandledUpdates();
// Now fire a single event and ensure that only one update is sent.
const WebAXObject& first_child = root_obj.ChildAt(0);
GetRenderAccessibilityImpl()->HandleAXEvent(
ui::AXEvent(first_child.AxID(), ax::mojom::Event::kFocus));
SendPendingAccessibilityEvents();
EXPECT_EQ(1, CountAccessibilityNodesSentToBrowser());
}
TEST_F(RenderAccessibilityImplTest, HideAccessibilityObject) {
// Test RenderAccessibilityImpl and make sure it sends the
// proper event to the browser when an object in the tree
// is hidden, but its children are not.
LoadHTMLAndRefreshAccessibilityTree(R"HTML(
<body>
<div role="group" id="A">
<div role="group" id="B" lang="en-US">
<div role="group" id="C" style="visibility: visible" lang="fr-CA">
</div>
</div>
</div>
</body>
)HTML");
EXPECT_EQ(6, CountAccessibilityNodesSentToBrowser());
WebDocument document = GetMainFrame()->GetDocument();
// Getting the root object will also force layout.
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
WebAXObject html = root_obj.ChildAt(0);
WebAXObject body = html.ChildAt(0);
WebAXObject node_a = body.ChildAt(0);
WebAXObject node_b = node_a.ChildAt(0);
WebAXObject node_c = node_b.ChildAt(0);
// Send a childrenChanged on "A".
ClearHandledUpdates();
GetRenderAccessibilityImpl()->MarkWebAXObjectDirty(node_a);
// Hide node "B" ("C" stays visible).
ExecuteJavaScriptForTests(
"document.getElementById('B').style.visibility = 'hidden';");
SendPendingAccessibilityEvents();
ui::AXTreeUpdate update = GetLastAccUpdate();
ASSERT_EQ(2U, update.nodes.size());
// Since ignored nodes are included in the ax tree with State::kIgnored set,
// "C" is NOT reparented, only the changed nodes are re-serialized.
// "A" updates because it handled dirty object
// "B" updates because its State::kIgnored has changed
EXPECT_EQ(0, update.node_id_to_clear);
EXPECT_EQ(node_a.AxID(), update.nodes[0].id);
EXPECT_EQ(node_b.AxID(), update.nodes[1].id);
EXPECT_EQ(2, CountAccessibilityNodesSentToBrowser());
}
TEST_F(RenderAccessibilityImplTest, ShowAccessibilityObject) {
// Test RenderAccessibilityImpl and make sure it sends the
// proper event to the browser when an object in the tree
// is shown, causing its own already-visible children to be
// reparented to it.
LoadHTMLAndRefreshAccessibilityTree(R"HTML(
<body>
<div role="group" id="A" aria-describedby="B">
<div role="group" id="B" style="visibility: hidden" lang="en-US">
<div role="group" id="C" style="visibility: visible" lang="fr-CA">
</div>
</div>
</div>
</body>
)HTML");
EXPECT_EQ(6, CountAccessibilityNodesSentToBrowser());
WebDocument document = GetMainFrame()->GetDocument();
// Getting the root object also forces a layout.
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
WebAXObject html = root_obj.ChildAt(0);
WebAXObject body = html.ChildAt(0);
WebAXObject node_a = body.ChildAt(0);
WebAXObject node_b = node_a.ChildAt(0);
WebAXObject node_c = node_b.ChildAt(0);
// Send a childrenChanged on "A" and show node "B",
GetRenderAccessibilityImpl()->MarkWebAXObjectDirty(node_a);
ExecuteJavaScriptForTests(
"document.getElementById('B').style.visibility = 'visible';");
ClearHandledUpdates();
SendPendingAccessibilityEvents();
ui::AXTreeUpdate update = GetLastAccUpdate();
// Since ignored nodes are included in the ax tree with State::kIgnored set,
// "C" is NOT reparented, only the changed nodes are re-serialized.
// "A" updates because it handled the dirty
// "B" updates because its State::kIgnored has changed
ASSERT_EQ(2U, update.nodes.size());
EXPECT_EQ(0, update.node_id_to_clear);
EXPECT_EQ(node_a.AxID(), update.nodes[0].id);
EXPECT_EQ(node_b.AxID(), update.nodes[1].id);
EXPECT_EQ(2, CountAccessibilityNodesSentToBrowser());
}
// Tests if the bounds of the fixed positioned node is updated after scrolling.
TEST_F(RenderAccessibilityImplTest, TestBoundsForFixedNodeAfterScroll) {
constexpr char html[] = R"HTML(
<div id="positioned" style="position:fixed; top:10px; font-size:40px;"
role="group" aria-label="first">title</div>
<div style="padding-top: 50px; font-size:40px;">
<h2>Heading #1</h2>
<h2>Heading #2</h2>
<h2>Heading #3</h2>
<h2>Heading #4</h2>
<h2>Heading #5</h2>
<h2>Heading #6</h2>
<h2>Heading #7</h2>
<h2>Heading #8</h2>
</div>
)HTML";
LoadHTMLAndRefreshAccessibilityTree(html);
int scroll_offset_y = 50;
ui::AXNodeID expected_id = ui::kInvalidAXNodeID;
ui::AXRelativeBounds expected_bounds;
// Prepare the expected information from the tree.
const std::vector<ui::AXTreeUpdate>& updates = GetHandledAccUpdates();
for (const auto& update : base::Reversed(updates)) {
for (const ui::AXNodeData& node : update.nodes) {
if (node.GetStringAttribute(ax::mojom::StringAttribute::kName) ==
"first") {
expected_id = node.id;
expected_bounds = node.relative_bounds;
expected_bounds.bounds.set_y(expected_bounds.bounds.y() +
scroll_offset_y);
break;
}
}
if (expected_id != ui::kInvalidAXNodeID)
break;
}
ClearHandledUpdates();
// Simulate scrolling down using JS.
std::string js("window.scrollTo(0, " + base::NumberToString(scroll_offset_y) +
");");
ExecuteJavaScriptForTests(js.c_str());
GetRenderAccessibilityImpl()->GetAXContext()->UpdateAXForAllDocuments();
WebDocument document = GetMainFrame()->GetDocument();
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
GetRenderAccessibilityImpl()->HandleAXEvent(
ui::AXEvent(root_obj.AxID(), ax::mojom::Event::kScrollPositionChanged));
SendPendingAccessibilityEvents();
EXPECT_EQ(1, CountAccessibilityNodesSentToBrowser());
// Make sure it's the root object that was updated for scrolling.
ui::AXTreeUpdate update = GetLastAccUpdate();
EXPECT_EQ(root_obj.AxID(), update.nodes[0].id);
// Make sure that a location change is sent for the fixed-positioned node.
std::vector<ui::AXLocationChange>& changes = GetLocationChanges();
EXPECT_EQ(changes.size(), 1u);
EXPECT_EQ(changes[0].id, expected_id);
EXPECT_EQ(changes[0].new_location, expected_bounds);
}
// Tests if the bounds are updated when it has multiple fixed nodes.
TEST_F(RenderAccessibilityImplTest, TestBoundsForMultipleFixedNodeAfterScroll) {
constexpr char html[] = R"HTML(
<div id="positioned" style="position:fixed; top:10px; font-size:40px;"
role="group" aria-label="first">title1</div>
<div id="positioned" style="position:fixed; top:50px; font-size:40px;"
role="group" aria-label="second">title2</div>
<div style="padding-top: 50px; font-size:40px;">
<h2>Heading #1</h2>
<h2>Heading #2</h2>
<h2>Heading #3</h2>
<h2>Heading #4</h2>
<h2>Heading #5</h2>
<h2>Heading #6</h2>
<h2>Heading #7</h2>
<h2>Heading #8</h2>
</div>)HTML";
LoadHTMLAndRefreshAccessibilityTree(html);
int scroll_offset_y = 50;
std::map<ui::AXNodeID, ui::AXRelativeBounds> expected;
// Prepare the expected information from the tree.
const std::vector<ui::AXTreeUpdate>& updates = GetHandledAccUpdates();
for (const ui::AXTreeUpdate& update : updates) {
for (const ui::AXNodeData& node : update.nodes) {
const std::string& name =
node.GetStringAttribute(ax::mojom::StringAttribute::kName);
if (name == "first" || name == "second") {
ui::AXRelativeBounds ax_bounds = node.relative_bounds;
ax_bounds.bounds.set_y(ax_bounds.bounds.y() + scroll_offset_y);
expected[node.id] = ax_bounds;
}
}
}
ClearHandledUpdates();
// Simulate scrolling down using JS.
std::string js("window.scrollTo(0, " + base::NumberToString(scroll_offset_y) +
");");
ExecuteJavaScriptForTests(js.c_str());
WebDocument document = GetMainFrame()->GetDocument();
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
GetRenderAccessibilityImpl()->GetAXContext()->UpdateAXForAllDocuments();
GetRenderAccessibilityImpl()->HandleAXEvent(
ui::AXEvent(root_obj.AxID(), ax::mojom::Event::kScrollPositionChanged));
SendPendingAccessibilityEvents();
EXPECT_EQ(1, CountAccessibilityNodesSentToBrowser());
// Make sure it's the root object that was updated for scrolling.
ui::AXTreeUpdate update = GetLastAccUpdate();
EXPECT_EQ(root_obj.AxID(), update.nodes[0].id);
// Make sure that a location change is sent for the fixed-positioned node.
std::vector<ui::AXLocationChange>& changes = GetLocationChanges();
EXPECT_EQ(changes.size(), 2u);
for (auto& change : changes) {
auto search = expected.find(change.id);
EXPECT_NE(search, expected.end());
EXPECT_EQ(search->second, change.new_location);
}
}
TEST_F(RenderAccessibilityImplTest, TestFocusConsistency) {
// Using aria-describedby ensures rhe ignored button is included in the tree.
constexpr char html[] = R"HTML(
<body>
<a id="link" tabindex=0>link</a>
<button id="button" style="visibility:hidden" tabindex=0
aria-describedby="button">button</button>
<script>
link.addEventListener("click", () => {
button.style.visibility = "visible";
button.focus();
});
</script>
</body>
)HTML";
LoadHTMLAndRefreshAccessibilityTree(html);
WebDocument document = GetMainFrame()->GetDocument();
// Getting the root object also forces a layout.
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
WebAXObject html_elem = root_obj.ChildAt(0);
WebAXObject body = html_elem.ChildAt(0);
WebAXObject link = body.ChildAt(0);
WebAXObject button = body.ChildAt(1);
// Set focus to the <a>, this will queue up an initial set of deferred
// accessibility events to be queued up on AXObjectCacheImpl.
ui::AXActionData action;
action.target_node_id = link.AxID();
action.action = ax::mojom::Action::kFocus;
GetRenderAccessibilityImpl()->PerformAction(action);
// Now perform the default action on the link, which will bounce focus to
// the button element.
action.target_node_id = link.AxID();
action.action = ax::mojom::Action::kDoDefault;
GetRenderAccessibilityImpl()->PerformAction(action);
// The events and updates from the previous operation would normally be
// processed in the next frame, but the initial focus operation caused a
// ScheduleSendPendingAccessibilityEvents.
SendPendingAccessibilityEvents();
// The pattern up DOM/style updates above result in multiple AXTreeUpdates
// sent over mojo. Search the updates to ensure that the button
const std::vector<ui::AXTreeUpdate>& updates = GetHandledAccUpdates();
ui::AXNodeID focused_node = ui::kInvalidAXNodeID;
bool found_button_update = false;
for (const auto& update : updates) {
if (update.has_tree_data)
focused_node = update.tree_data.focus_id;
for (const auto& node_data : update.nodes) {
if (node_data.id == button.AxID() &&
!node_data.HasState(ax::mojom::State::kIgnored))
found_button_update = true;
}
}
EXPECT_EQ(focused_node, button.AxID());
EXPECT_TRUE(found_button_update);
}
// Web popups don't exist on Android, so this test doesn't have to be run on
// this platform.
#if !BUILDFLAG(IS_ANDROID)
TEST_F(RenderAccessibilityImplTest, TestHitTestPopupDoesNotCrash) {
constexpr char html[] = R"HTML(
<body>
<select>
<option>1</option>
<option>2</option>
<option>3</option>
<option id="option_test">4</option>
</select>
<script>
// Trigger endless layout updates in the popup so the cache is
// processing deferred events.
var option_test = document.getElementById("option_test");
function update() {
option_test.innerHTML = Math.random();
}
window.setInterval(update, 100);
</script>
</body>
)HTML";
LoadHTMLAndRefreshAccessibilityTree(html);
WebDocument document = GetMainFrame()->GetDocument();
// Getting the root object also forces a layout.
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
WebAXObject html_elem = root_obj.ChildAt(0);
WebAXObject body = html_elem.ChildAt(0);
WebAXObject select = body.ChildAt(0);
// Open the popup.
ui::AXActionData action;
action.target_node_id = select.AxID();
action.action = ax::mojom::Action::kDoDefault;
GetRenderAccessibilityImpl()->PerformAction(action);
blink::WebPagePopup* popup = frame()->GetWebView()->GetPagePopup();
DCHECK_NE(popup, nullptr);
// Hit test the popup and ignore the result. This test is ensuring that hit
// testing can occur while processing deferred events, which means the cache
// needs to be frozen.
GetRenderAccessibilityImpl()->HitTest(
select.GetBoundsInFrameCoordinates().CenterPoint(),
ax::mojom::Event::kHover, /*request_id*/ 0,
base::BindOnce(
[](mojo::StructPtr<blink::mojom::HitTestResponse>) { return; }));
SendPendingAccessibilityEvents();
}
#endif // #if !BUILDFLAG(IS_ANDROID)
TEST_F(RenderAccessibilityImplTest, TestExpandCollapseTreeItem) {
constexpr char html[] = R"HTML(
<body>
<div>
<ol role="tree">
<li role="treeitem" aria-expanded="false" id="1">
</li>
</ol>
</div>
</body>
)HTML";
LoadHTMLAndRefreshAccessibilityTree(html);
WebDocument document = GetMainFrame()->GetDocument();
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
WebAXObject html_elem = root_obj.ChildAt(0);
WebAXObject body = html_elem.ChildAt(0);
WebAXObject div = body.ChildAt(0);
WebAXObject ol = div.ChildAt(0);
WebAXObject tree_item = ol.ChildAt(0);
std::string js(
"document.getElementById('1').addEventListener('keydown', (event) => { "
"let item = "
"document.getElementById('1'); if (event.key === 'ArrowRight') { "
"item.setAttribute('aria-expanded','true');} else if (event.key === "
"'ArrowLeft') { item.setAttribute('aria-expanded','false'); }}, true);");
ExecuteJavaScriptForTests(js.c_str());
// Expanding.
ui::AXActionData action;
action.target_node_id = tree_item.AxID();
action.action = ax::mojom::Action::kExpand;
GetRenderAccessibilityImpl()->PerformAction(action);
SendPendingAccessibilityEvents();
const std::vector<ui::AXTreeUpdate>& updates = GetHandledAccUpdates();
bool found_expanded_update = false;
for (const auto& update : updates) {
for (const auto& node_data : update.nodes) {
if (node_data.id == tree_item.AxID() &&
node_data.HasState(ax::mojom::State::kExpanded)) {
found_expanded_update = true;
}
}
}
EXPECT_TRUE(found_expanded_update);
// Expanding when expanded
action.target_node_id = tree_item.AxID();
action.action = ax::mojom::Action::kExpand;
GetRenderAccessibilityImpl()->PerformAction(action);
SendPendingAccessibilityEvents();
const std::vector<ui::AXTreeUpdate>& updates_2 = GetHandledAccUpdates();
found_expanded_update = false;
for (const auto& update : updates_2) {
for (const auto& node_data : update.nodes) {
if (node_data.id == tree_item.AxID() &&
node_data.HasState(ax::mojom::State::kExpanded)) {
found_expanded_update = true;
}
}
}
// Since item was already expanded, it should remain as such.
EXPECT_TRUE(found_expanded_update);
// Collapse when expanded.
action.target_node_id = tree_item.AxID();
action.action = ax::mojom::Action::kCollapse;
GetRenderAccessibilityImpl()->PerformAction(action);
SendPendingAccessibilityEvents();
const std::vector<ui::AXTreeUpdate>& updates_3 = GetHandledAccUpdates();
bool found_collapsed_update = false;
for (const auto& update : updates_3) {
for (const auto& node_data : update.nodes) {
if (node_data.id == tree_item.AxID() &&
node_data.HasState(ax::mojom::State::kCollapsed)) {
found_collapsed_update = true;
}
}
}
// Element should have collapsed.
EXPECT_TRUE(found_collapsed_update);
// Collapse when collapsed.
action.target_node_id = tree_item.AxID();
action.action = ax::mojom::Action::kCollapse;
GetRenderAccessibilityImpl()->PerformAction(action);
SendPendingAccessibilityEvents();
const std::vector<ui::AXTreeUpdate>& updates_4 = GetHandledAccUpdates();
found_collapsed_update = false;
for (const auto& update : updates_4) {
for (const auto& node_data : update.nodes) {
if (node_data.id == tree_item.AxID() &&
node_data.HasState(ax::mojom::State::kCollapsed)) {
found_collapsed_update = true;
}
}
}
// Element should still be collapsed.
EXPECT_TRUE(found_collapsed_update);
}
class MockPluginAccessibilityTreeSource
: public ui::
AXTreeSource<const ui::AXNode*, ui::AXTreeData*, ui::AXNodeData>,
public content::PluginAXTreeActionTargetAdapter {
public:
MockPluginAccessibilityTreeSource(ui::AXNodeID root_node_id) {
ax_tree_ = std::make_unique<ui::AXTree>();
root_node_ =
std::make_unique<ui::AXNode>(ax_tree_.get(), nullptr, root_node_id, 0);
}
MockPluginAccessibilityTreeSource(const MockPluginAccessibilityTreeSource&) =
delete;
MockPluginAccessibilityTreeSource& operator=(
const MockPluginAccessibilityTreeSource&) = delete;
~MockPluginAccessibilityTreeSource() override {}
bool GetTreeData(ui::AXTreeData* data) const override { return true; }
ui::AXNode* GetRoot() const override { return root_node_.get(); }
ui::AXNode* GetFromId(ui::AXNodeID id) const override {
return (root_node_->data().id == id) ? root_node_.get() : nullptr;
}
int32_t GetId(const ui::AXNode* node) const override {
return root_node_->data().id;
}
void CacheChildrenIfNeeded(const ui::AXNode*) override {}
size_t GetChildCount(const ui::AXNode* node) const override {
return node->children().size();
}
const ui::AXNode* ChildAt(const ui::AXNode* node,
size_t index) const override {
return node->children()[index];
}
void ClearChildCache(const ui::AXNode*) override {}
ui::AXNode* GetParent(const ui::AXNode* node) const override {
return nullptr;
}
bool IsEqual(const ui::AXNode* node1,
const ui::AXNode* node2) const override {
return (node1 == node2);
}
const ui::AXNode* GetNull() const override { return nullptr; }
void SerializeNode(const ui::AXNode* node,
ui::AXNodeData* out_data) const override {
DCHECK(node);
*out_data = node->data();
}
void HandleAction(const ui::AXActionData& action_data) {}
void ResetAccActionStatus() {}
bool IsIgnored(const ui::AXNode* node) const override { return false; }
std::unique_ptr<ui::AXActionTarget> CreateActionTarget(
ui::AXNodeID id) override {
action_target_called_ = true;
return std::make_unique<ui::NullAXActionTarget>();
}
bool GetActionTargetCalled() { return action_target_called_; }
void ResetActionTargetCalled() { action_target_called_ = false; }
private:
std::unique_ptr<ui::AXTree> ax_tree_;
std::unique_ptr<ui::AXNode> root_node_;
bool action_target_called_ = false;
};
TEST_F(RenderAccessibilityImplTest, TestAXActionTargetFromNodeId) {
// Validate that we create the correct type of AXActionTarget for a given
// node id.
constexpr char html[] = R"HTML(
<body>
</body>
)HTML";
LoadHTMLAndRefreshAccessibilityTree(html);
WebDocument document = GetMainFrame()->GetDocument();
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
WebAXObject body = root_obj.ChildAt(0);
// An AxID for an HTML node should produce a Blink action target.
std::unique_ptr<ui::AXActionTarget> body_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, nullptr,
body.AxID());
EXPECT_EQ(ui::AXActionTarget::Type::kBlink, body_action_target->GetType());
// An AxID for a Plugin node should produce a Plugin action target.
ui::AXNodeID root_node_id = 100;
MockPluginAccessibilityTreeSource pdf_acc_tree(root_node_id);
// GetRenderAccessibilityImpl()->SetPluginTreeSource(&pdf_acc_tree);
// An AxId from Pdf, should call PdfAccessibilityTree::CreateActionTarget.
std::unique_ptr<ui::AXActionTarget> pdf_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, &pdf_acc_tree,
root_node_id);
EXPECT_TRUE(pdf_acc_tree.GetActionTargetCalled());
pdf_acc_tree.ResetActionTargetCalled();
// An invalid AxID should produce a null action target.
std::unique_ptr<ui::AXActionTarget> null_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, &pdf_acc_tree,
-1);
EXPECT_EQ(ui::AXActionTarget::Type::kNull, null_action_target->GetType());
}
TEST_F(RenderAccessibilityImplTest, SendPendingAccessibilityEventsPostLoad) {
LoadHTMLAndRefreshAccessibilityTree(R"HTML(
<body>
<input id="text" value="Hello, World">
</body>
)HTML");
// No logs initially.
base::HistogramTester histogram_tester;
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents2", 0);
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents.PostLoad2", 0);
// A load started event pauses logging.
WebDocument document = GetMainFrame()->GetDocument();
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
GetRenderAccessibilityImpl()->DidCommitProvisionalLoad(
ui::PAGE_TRANSITION_LINK);
GetRenderAccessibilityImpl()->HandleAXEvent(
ui::AXEvent(root_obj.AxID(), ax::mojom::Event::kLoadStart));
SendPendingAccessibilityEvents();
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents2", 1);
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents.PostLoad2", 0);
// Do not log in the serialization immediately following load completion.
GetRenderAccessibilityImpl()->HandleAXEvent(
ui::AXEvent(root_obj.AxID(), ax::mojom::Event::kLoadComplete));
SendPendingAccessibilityEvents();
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents2", 2);
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents.PostLoad2", 0);
// Now we start logging.
GetRenderAccessibilityImpl()->MarkWebAXObjectDirty(root_obj);
SendPendingAccessibilityEvents();
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents2", 3);
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents.PostLoad2", 1);
GetRenderAccessibilityImpl()->MarkWebAXObjectDirty(root_obj);
SendPendingAccessibilityEvents();
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents2", 4);
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents.PostLoad2", 2);
}
class BlinkAXActionTargetTest : public RenderAccessibilityImplTest {
protected:
void SetUp() override {
// Disable overlay scrollbars to avoid DCHECK on ChromeOS.
feature_list_.InitAndDisableFeature(features::kOverlayScrollbar);
RenderAccessibilityImplTest::SetUp();
}
private:
base::test::ScopedFeatureList feature_list_;
};
TEST_F(BlinkAXActionTargetTest, TestSetRangeValue) {
constexpr char html[] = R"HTML(
<body>
<input type=range min=1 value=2 max=3 step=1>
</body>
)HTML";
LoadHTMLAndRefreshAccessibilityTree(html);
WebDocument document = GetMainFrame()->GetDocument();
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
WebAXObject html_elem = root_obj.ChildAt(0);
WebAXObject body = html_elem.ChildAt(0);
WebAXObject input_range = body.ChildAt(0);
float value = 0.0f;
EXPECT_TRUE(input_range.ValueForRange(&value));
EXPECT_EQ(2.0f, value);
std::unique_ptr<ui::AXActionTarget> input_range_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, nullptr,
input_range.AxID());
EXPECT_EQ(ui::AXActionTarget::Type::kBlink,
input_range_action_target->GetType());
std::string value_to_set("1.0");
{
ui::AXActionData action_data;
action_data.action = ax::mojom::Action::kSetValue;
action_data.value = value_to_set;
EXPECT_TRUE(input_range.PerformAction(action_data));
}
EXPECT_TRUE(input_range.ValueForRange(&value));
EXPECT_EQ(1.0f, value);
SendPendingAccessibilityEvents();
EXPECT_EQ(1, CountAccessibilityNodesSentToBrowser());
{
// Make sure it's the input range object that was updated.
ui::AXTreeUpdate update = GetLastAccUpdate();
EXPECT_EQ(input_range.AxID(), update.nodes[0].id);
}
}
TEST_F(BlinkAXActionTargetTest, TestMethods) {
// Exercise the methods on BlinkAXActionTarget to ensure they have the
// expected effects.
constexpr char html[] = R"HTML(
<body>
<input type=checkbox>
<input type=range min=1 value=2 max=3 step=1>
<input type=text>
<select size=2>
<option>One</option>
<option>Two</option>
</select>
<div style='width:100px; height: 100px; overflow:scroll'>
<div style='width:1000px; height:900px'></div>
<div style='width:1000px; height:100px'></div>
</div>
<div>Text Node One</div>
<div>Text Node Two</div>
</body>
)HTML";
LoadHTMLAndRefreshAccessibilityTree(html);
WebDocument document = GetMainFrame()->GetDocument();
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
WebAXObject html_elem = root_obj.ChildAt(0);
WebAXObject body = html_elem.ChildAt(0);
WebAXObject input_checkbox = body.ChildAt(0);
WebAXObject input_range = body.ChildAt(1);
WebAXObject input_text = body.ChildAt(2);
WebAXObject option = body.ChildAt(3).ChildAt(0).ChildAt(0);
WebAXObject scroller = body.ChildAt(4);
WebAXObject scroller_child = body.ChildAt(4).ChildAt(1);
WebAXObject text_one = body.ChildAt(5).ChildAt(0);
WebAXObject text_two = body.ChildAt(6).ChildAt(0);
std::unique_ptr<ui::AXActionTarget> input_checkbox_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, nullptr,
input_checkbox.AxID());
EXPECT_EQ(ui::AXActionTarget::Type::kBlink,
input_checkbox_action_target->GetType());
std::unique_ptr<ui::AXActionTarget> input_range_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, nullptr,
input_range.AxID());
EXPECT_EQ(ui::AXActionTarget::Type::kBlink,
input_range_action_target->GetType());
std::unique_ptr<ui::AXActionTarget> input_text_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, nullptr,
input_text.AxID());
EXPECT_EQ(ui::AXActionTarget::Type::kBlink,
input_text_action_target->GetType());
std::unique_ptr<ui::AXActionTarget> option_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, nullptr,
option.AxID());
EXPECT_EQ(ui::AXActionTarget::Type::kBlink, option_action_target->GetType());
std::unique_ptr<ui::AXActionTarget> scroller_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, nullptr,
scroller.AxID());
EXPECT_EQ(ui::AXActionTarget::Type::kBlink,
scroller_action_target->GetType());
std::unique_ptr<ui::AXActionTarget> scroller_child_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, nullptr,
scroller_child.AxID());
EXPECT_EQ(ui::AXActionTarget::Type::kBlink,
scroller_child_action_target->GetType());
std::unique_ptr<ui::AXActionTarget> text_one_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, nullptr,
text_one.AxID());
EXPECT_EQ(ui::AXActionTarget::Type::kBlink,
text_one_action_target->GetType());
std::unique_ptr<ui::AXActionTarget> text_two_action_target =
AXActionTargetFactory::CreateFromNodeIdOrRole(document, nullptr,
text_two.AxID());
EXPECT_EQ(ui::AXActionTarget::Type::kBlink,
text_two_action_target->GetType());
EXPECT_EQ(ax::mojom::CheckedState::kFalse, input_checkbox.CheckedState());
{
ui::AXActionData action_data;
action_data.action = ax::mojom::Action::kDoDefault;
EXPECT_TRUE(input_checkbox_action_target->PerformAction(action_data));
}
EXPECT_EQ(ax::mojom::CheckedState::kTrue, input_checkbox.CheckedState());
float value = 0.0f;
EXPECT_TRUE(input_range.ValueForRange(&value));
EXPECT_EQ(2.0f, value);
{
ui::AXActionData action_data;
action_data.action = ax::mojom::Action::kDecrement;
EXPECT_TRUE(input_range_action_target->PerformAction(action_data));
}
EXPECT_TRUE(input_range.ValueForRange(&value));
EXPECT_EQ(1.0f, value);
{
ui::AXActionData action_data;
action_data.action = ax::mojom::Action::kIncrement;
EXPECT_TRUE(input_range_action_target->PerformAction(action_data));
}
EXPECT_TRUE(input_range.ValueForRange(&value));
EXPECT_EQ(2.0f, value);
EXPECT_FALSE(input_range.IsFocused());
{
ui::AXActionData action_data;
action_data.action = ax::mojom::Action::kFocus;
EXPECT_TRUE(input_range_action_target->PerformAction(action_data));
}
EXPECT_TRUE(input_range.IsFocused());
{
// Blurring an element requires layout to be clean.
GetRenderAccessibilityImpl()->GetAXContext()->UpdateAXForAllDocuments();
ui::AXActionData action_data;
action_data.action = ax::mojom::Action::kBlur;
EXPECT_TRUE(input_range_action_target->PerformAction(action_data));
}
EXPECT_FALSE(input_range.IsFocused());
// Increment/decrement actions produce synthesized keydown and keyup events,
// and the keyup event is delayed 100ms to look more natural. We need to wait
// for them to happen to finish the test cleanly in the TearDown phase.
task_environment_.FastForwardBy(base::Seconds(1));
GetRenderAccessibilityImpl()->GetAXContext()->UpdateAXForAllDocuments();
gfx::RectF expected_bounds;
blink::WebAXObject offset_container;
gfx::Transform container_transform;
input_checkbox.GetRelativeBounds(offset_container, expected_bounds,
container_transform);
gfx::Rect actual_bounds = input_checkbox_action_target->GetRelativeBounds();
EXPECT_EQ(static_cast<int>(expected_bounds.x()), actual_bounds.x());
EXPECT_EQ(static_cast<int>(expected_bounds.y()), actual_bounds.y());
EXPECT_EQ(static_cast<int>(expected_bounds.width()), actual_bounds.width());
EXPECT_EQ(static_cast<int>(expected_bounds.height()), actual_bounds.height());
gfx::Point offset_to_set(500, 500);
scroller_action_target->SetScrollOffset(gfx::Point(500, 500));
EXPECT_EQ(offset_to_set, scroller_action_target->GetScrollOffset());
EXPECT_EQ(gfx::Point(0, 0), scroller_action_target->MinimumScrollOffset());
EXPECT_GE(scroller_action_target->MaximumScrollOffset().y(), 900);
std::string value_to_set("test-value");
{
ui::AXActionData action_data;
action_data.action = ax::mojom::Action::kSetValue;
action_data.value = value_to_set;
EXPECT_TRUE(input_text_action_target->PerformAction(action_data));
}
EXPECT_EQ(value_to_set, input_text.GetValueForControl().Utf8());
// Setting selection requires layout to be clean.
GetRenderAccessibilityImpl()->GetAXContext()->UpdateAXForAllDocuments();
EXPECT_TRUE(text_one_action_target->SetSelection(
text_one_action_target.get(), 3, text_two_action_target.get(), 4));
bool is_selection_backward;
blink::WebAXObject anchor_object;
int anchor_offset;
ax::mojom::TextAffinity anchor_affinity;
blink::WebAXObject focus_object;
int focus_offset;
ax::mojom::TextAffinity focus_affinity;
root_obj.Selection(is_selection_backward, anchor_object, anchor_offset,
anchor_affinity, focus_object, focus_offset,
focus_affinity);
EXPECT_EQ(text_one, anchor_object);
EXPECT_EQ(3, anchor_offset);
EXPECT_EQ(text_two, focus_object);
EXPECT_EQ(4, focus_offset);
scroller_action_target->SetScrollOffset(gfx::Point(0, 0));
EXPECT_EQ(gfx::Point(0, 0), scroller_action_target->GetScrollOffset());
EXPECT_TRUE(scroller_child_action_target->ScrollToMakeVisible());
EXPECT_GE(scroller_action_target->GetScrollOffset().y(), 900);
scroller_action_target->SetScrollOffset(gfx::Point(0, 0));
EXPECT_EQ(gfx::Point(0, 0), scroller_action_target->GetScrollOffset());
EXPECT_TRUE(scroller_child_action_target->ScrollToMakeVisibleWithSubFocus(
gfx::Rect(0, 0, 50, 50), ax::mojom::ScrollAlignment::kScrollAlignmentLeft,
ax::mojom::ScrollAlignment::kScrollAlignmentTop,
ax::mojom::ScrollBehavior::kDoNotScrollIfVisible));
EXPECT_GE(scroller_action_target->GetScrollOffset().y(), 900);
scroller_action_target->SetScrollOffset(gfx::Point(0, 0));
EXPECT_EQ(gfx::Point(0, 0), scroller_action_target->GetScrollOffset());
{
ui::AXActionData action_data;
action_data.action = ax::mojom::Action::kScrollToPoint;
action_data.target_point = gfx::Point(0, 0);
EXPECT_TRUE(scroller_child_action_target->PerformAction(action_data));
}
EXPECT_GE(scroller_action_target->GetScrollOffset().y(), 900);
}
// URL-keyed metrics recorder implementation that just counts the number
// of times it's been called.
class MockUkmRecorder : public ukm::MojoUkmRecorder {
public:
MockUkmRecorder(ukm::mojom::UkmRecorderFactory& factory)
: MojoUkmRecorder(factory) {}
void AddEntry(ukm::mojom::UkmEntryPtr entry) override { calls_++; }
int calls() const { return calls_; }
private:
int calls_ = 0;
};
// Tests for URL-keyed metrics.
class RenderAccessibilityImplUKMTest : public RenderAccessibilityImplTest {
public:
void SetUp() override {
RenderAccessibilityImplTest::SetUp();
mojo::Remote<ukm::mojom::UkmRecorderFactory> factory;
std::ignore = factory.BindNewPipeAndPassReceiver();
GetRenderAccessibilityImpl()->ukm_recorder_ =
std::make_unique<MockUkmRecorder>(*factory);
}
void TearDown() override { RenderAccessibilityImplTest::TearDown(); }
MockUkmRecorder* ukm_recorder() {
return static_cast<MockUkmRecorder*>(
GetRenderAccessibilityImpl()->ukm_recorder_.get());
}
void SetTimeDelayForNextSerialize(base::TimeDelta delta) {
task_environment_.FastForwardBy(delta);
GetRenderAccessibilityImpl()->slowest_serialization_time_ = delta;
}
};
TEST_F(RenderAccessibilityImplUKMTest, TestFireUKMs) {
LoadHTMLAndRefreshAccessibilityTree(R"HTML(
<body>
<input id="text" value="Hello, World">
</body>
)HTML");
// No URL-keyed metrics should be fired initially.
EXPECT_EQ(0, ukm_recorder()->calls());
base::HistogramTester histogram_tester;
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents2", 0);
// No URL-keyed metrics should be fired after we send one event.
WebDocument document = GetMainFrame()->GetDocument();
WebAXObject root_obj = WebAXObject::FromWebDocument(document);
GetRenderAccessibilityImpl()->MarkWebAXObjectDirty(root_obj);
SendPendingAccessibilityEvents();
EXPECT_EQ(0, ukm_recorder()->calls());
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents2", 1);
// No URL-keyed metrics should be fired even after an event that takes
// 300 ms, but we should now have something to send.
// This must be >= kMinSerializationTimeToSendInMS
GetRenderAccessibilityImpl()->MarkWebAXObjectDirty(root_obj);
SendPendingAccessibilityEvents();
SetTimeDelayForNextSerialize(base::Milliseconds(300));
EXPECT_EQ(0, ukm_recorder()->calls());
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents2", 2);
// After 1000 seconds have passed, the next time we send an event we should
// send URL-keyed metrics.
task_environment_.FastForwardBy(base::Seconds(1000));
GetRenderAccessibilityImpl()->MarkWebAXObjectDirty(root_obj);
SendPendingAccessibilityEvents();
EXPECT_EQ(1, ukm_recorder()->calls());
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents2", 3);
// Send another event that takes a long (simulated) time to serialize.
// This must be >= kMinSerializationTimeToSend
SetTimeDelayForNextSerialize(base::Milliseconds(200));
GetRenderAccessibilityImpl()->MarkWebAXObjectDirty(root_obj);
SendPendingAccessibilityEvents();
histogram_tester.ExpectTotalCount(
"Accessibility.Performance.SendPendingAccessibilityEvents2", 4);
// We shouldn't have a new call to the UKM recorder yet, not enough
// time has elapsed.
EXPECT_EQ(1, ukm_recorder()->calls());
// Navigate to a new page.
GetRenderAccessibilityImpl()->DidCommitProvisionalLoad(
ui::PAGE_TRANSITION_LINK);
// Now we should have yet another UKM recorded because of the page
// transition.
EXPECT_EQ(2, ukm_recorder()->calls());
}
} // namespace content