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ax_node_position_unittest.cc
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ax_node_position_unittest.cc
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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdint.h>
#include <algorithm>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/callback.h"
#include "base/strings/strcat.h"
#include "base/strings/utf_string_conversions.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/accessibility/ax_enums.mojom.h"
#include "ui/accessibility/ax_node.h"
#include "ui/accessibility/ax_node_data.h"
#include "ui/accessibility/ax_node_position.h"
#include "ui/accessibility/ax_range.h"
#include "ui/accessibility/ax_selection.h"
#include "ui/accessibility/ax_tree.h"
#include "ui/accessibility/ax_tree_data.h"
#include "ui/accessibility/ax_tree_id.h"
#include "ui/accessibility/ax_tree_update.h"
#include "ui/accessibility/test_ax_tree_manager.h"
namespace ui {
using TestPositionType = std::unique_ptr<AXPosition<AXNodePosition, AXNode>>;
using TestPositionRange = AXRange<AXPosition<AXNodePosition, AXNode>>;
namespace {
constexpr AXNodeID ROOT_ID = 1;
constexpr AXNodeID BUTTON_ID = 2;
constexpr AXNodeID CHECK_BOX_ID = 3;
constexpr AXNodeID TEXT_FIELD_ID = 4;
constexpr AXNodeID STATIC_TEXT1_ID = 5;
constexpr AXNodeID INLINE_BOX1_ID = 6;
constexpr AXNodeID LINE_BREAK_ID = 7;
constexpr AXNodeID STATIC_TEXT2_ID = 8;
constexpr AXNodeID INLINE_BOX2_ID = 9;
// A group of basic and extended characters.
constexpr const wchar_t* kGraphemeClusters[] = {
// The English word "hey" consisting of four ASCII characters.
L"h",
L"e",
L"y",
// A Hindi word (which means "Hindi") consisting of two Devanagari
// grapheme clusters.
L"\x0939\x093F",
L"\x0928\x094D\x0926\x0940",
// A Thai word (which means "feel") consisting of three Thai grapheme
// clusters.
L"\x0E23\x0E39\x0E49",
L"\x0E2A\x0E36",
L"\x0E01",
};
class AXPositionTest : public ::testing::Test, public TestAXTreeManager {
public:
AXPositionTest();
AXPositionTest(const AXPositionTest&) = delete;
AXPositionTest& operator=(const AXPositionTest&) = delete;
~AXPositionTest() override = default;
protected:
static const char* TEXT_VALUE;
void SetUp() override;
// Creates a document with three pages, adding any extra information to this
// basic document structure that has been provided as arguments.
std::unique_ptr<AXTree> CreateMultipageDocument(
AXNodeData& root_data,
AXNodeData& page_1_data,
AXNodeData& page_1_text_data,
AXNodeData& page_2_data,
AXNodeData& page_2_text_data,
AXNodeData& page_3_data,
AXNodeData& page_3_text_data) const;
// Creates a browser window with a forest of accessibility trees: A more
// complex Views tree, plus a tree for the whole webpage, containing one
// additional tree representing an out-of-process iframe. Returns a vector
// containing the three managers for the trees in an out argument. (Note that
// fatal assertions can only be propagated from a `void` method.)
void CreateBrowserWindow(AXNodeData& window,
AXNodeData& back_button,
AXNodeData& web_view,
AXNodeData& root_web_area,
AXNodeData& iframe_root,
AXNodeData& paragraph,
AXNodeData& address_bar,
std::vector<TestAXTreeManager>& out_managers) const;
// Creates a document with three static text objects each containing text in a
// different language.
std::unique_ptr<AXTree> CreateMultilingualDocument(
std::vector<int>* text_offsets) const;
void AssertTextLengthEquals(const AXTree* tree,
AXNodeID node_id,
int expected_text_length) const;
// Creates a new AXTree from a vector of nodes.
// Assumes the first node in the vector is the root.
std::unique_ptr<AXTree> CreateAXTree(
const std::vector<AXNodeData>& nodes,
const AXTreeID& parent_tree_id = AXTreeID()) const;
AXNodeData root_;
AXNodeData button_;
AXNodeData check_box_;
AXNodeData text_field_;
AXNodeData static_text1_;
AXNodeData line_break_;
AXNodeData static_text2_;
AXNodeData inline_box1_;
AXNodeData inline_box2_;
private:
ScopedAXEmbeddedObjectBehaviorSetter ax_embedded_object_behaviour_;
// Manages a minimalistic Views tree that is hosting the test webpage.
TestAXTreeManager views_tree_manager_;
};
// Used by AXPositionExpandToEnclosingTextBoundaryTestWithParam.
//
// Every test instance starts from a pre-determined position and calls the
// ExpandToEnclosingTextBoundary method with the arguments provided in this
// struct.
struct ExpandToEnclosingTextBoundaryTestParam {
// The text boundary to expand to.
ax::mojom::TextBoundary boundary;
// Determines how to expand to the enclosing range when the starting position
// is already at a text boundary.
AXRangeExpandBehavior expand_behavior;
// The text position that should be returned for the anchor of the range.
std::string expected_anchor_position;
// The text position that should be returned for the focus of the range.
std::string expected_focus_position;
};
// This is a fixture for a set of parameterized tests that test the
// |ExpandToEnclosingTextBoundary| method with all possible input arguments.
class AXPositionExpandToEnclosingTextBoundaryTestWithParam
: public AXPositionTest,
public ::testing::WithParamInterface<
ExpandToEnclosingTextBoundaryTestParam> {
public:
AXPositionExpandToEnclosingTextBoundaryTestWithParam() = default;
AXPositionExpandToEnclosingTextBoundaryTestWithParam(
const AXPositionExpandToEnclosingTextBoundaryTestWithParam&) = delete;
AXPositionExpandToEnclosingTextBoundaryTestWithParam& operator=(
const AXPositionExpandToEnclosingTextBoundaryTestWithParam&) = delete;
~AXPositionExpandToEnclosingTextBoundaryTestWithParam() override = default;
};
// Used by AXPositionCreatePositionAtTextBoundaryTestWithParam.
//
// Every test instance starts from a pre-determined position and calls the
// CreatePositionAtTextBoundary method with the arguments provided in this
// struct.
struct CreatePositionAtTextBoundaryTestParam {
// The text boundary to move to.
ax::mojom::TextBoundary boundary;
// The direction to move to.
ax::mojom::MoveDirection direction;
// What to do when the starting position is already at a text boundary, or
// when the movement operation will cause us to cross the starting object's
// boundary.
AXMovementOptions movement_options;
// The text position that should be returned, if the method was called on a
// text position instance.
std::string expected_text_position;
};
// This is a fixture for a set of parameterized tests that test the
// |CreatePositionAtTextBoundary| method with all possible input arguments.
class AXPositionCreatePositionAtTextBoundaryTestWithParam
: public AXPositionTest,
public ::testing::WithParamInterface<
CreatePositionAtTextBoundaryTestParam> {
public:
AXPositionCreatePositionAtTextBoundaryTestWithParam() = default;
AXPositionCreatePositionAtTextBoundaryTestWithParam(
const AXPositionCreatePositionAtTextBoundaryTestWithParam&) = delete;
AXPositionCreatePositionAtTextBoundaryTestWithParam& operator=(
const AXPositionCreatePositionAtTextBoundaryTestWithParam&) = delete;
~AXPositionCreatePositionAtTextBoundaryTestWithParam() override = default;
};
// Used by |AXPositionTextNavigationTestWithParam|.
//
// The test starts from a pre-determined position and repeats a text navigation
// operation, such as |CreateNextWordStartPosition|, until it runs out of
// expectations.
struct TextNavigationTestParam {
// Stores the method that should be called repeatedly by the test to create
// the next position.
base::RepeatingCallback<TestPositionType(const TestPositionType&)> TestMethod;
// The node at which the test should start.
AXNodeID start_node_id;
// The text offset at which the test should start.
int start_offset;
// A list of positions that should be returned from the method being tested,
// in stringified form.
std::vector<std::string> expectations;
};
// This is a fixture for a set of parameterized tests that ensure that text
// navigation operations, such as |CreateNextWordStartPosition|, work properly.
//
// Starting from a given position, test instances call a given text navigation
// method repeatedly and compare the return values to a set of expectations.
//
// TODO(nektar): Only text positions are tested for now.
class AXPositionTextNavigationTestWithParam
: public AXPositionTest,
public ::testing::WithParamInterface<TextNavigationTestParam> {
public:
AXPositionTextNavigationTestWithParam() = default;
AXPositionTextNavigationTestWithParam(
const AXPositionTextNavigationTestWithParam&) = delete;
AXPositionTextNavigationTestWithParam& operator=(
const AXPositionTextNavigationTestWithParam&) = delete;
~AXPositionTextNavigationTestWithParam() override = default;
};
// Most tests use kSuppressCharacter behavior.
AXPositionTest::AXPositionTest()
: ax_embedded_object_behaviour_(
AXEmbeddedObjectBehavior::kSuppressCharacter) {}
const char* AXPositionTest::TEXT_VALUE = "Line 1\nLine 2";
void AXPositionTest::SetUp() {
// First create a minimalistic Views tree that would host the test webpage.
// Window (BrowserRootView)
// ++NonClientView
// ++++WebView
AXNodeData window;
window.id = 1;
window.role = ax::mojom::Role::kWindow;
window.SetName("Test page - Google Chrome");
window.AddStringAttribute(ax::mojom::StringAttribute::kClassName,
"BrowserRootView");
AXNodeData non_client_view;
non_client_view.id = 2;
non_client_view.role = ax::mojom::Role::kClient;
non_client_view.SetName("Google Chrome");
non_client_view.AddStringAttribute(ax::mojom::StringAttribute::kClassName,
"NonClientView");
window.child_ids = {non_client_view.id};
AXNodeData web_view;
web_view.id = 3;
web_view.role = ax::mojom::Role::kWebView;
web_view.AddState(ax::mojom::State::kInvisible);
web_view.SetNameExplicitlyEmpty();
web_view.AddStringAttribute(ax::mojom::StringAttribute::kClassName,
"WebView");
non_client_view.child_ids = {web_view.id};
std::unique_ptr<AXTree> views_tree =
CreateAXTree({window, non_client_view, web_view});
// Now create the webpage tree.
// root_
// |
// +------------+-----------+
// | | |
// button_ check_box_ text_field_
// |
// +-----------+------------+
// | | |
// static_text1_ line_break_ static_text2_
// | |
// inline_box1_ inline_box2_
root_.id = ROOT_ID;
button_.id = BUTTON_ID;
check_box_.id = CHECK_BOX_ID;
text_field_.id = TEXT_FIELD_ID;
static_text1_.id = STATIC_TEXT1_ID;
inline_box1_.id = INLINE_BOX1_ID;
line_break_.id = LINE_BREAK_ID;
static_text2_.id = STATIC_TEXT2_ID;
inline_box2_.id = INLINE_BOX2_ID;
root_.role = ax::mojom::Role::kRootWebArea;
root_.AddBoolAttribute(ax::mojom::BoolAttribute::kIsLineBreakingObject, true);
button_.role = ax::mojom::Role::kButton;
button_.AddBoolAttribute(ax::mojom::BoolAttribute::kIsLineBreakingObject,
true);
button_.SetHasPopup(ax::mojom::HasPopup::kMenu);
button_.SetName("Button");
// Name is not visible in the tree's text representation, i.e. it may be
// coming from an aria-label.
button_.SetNameFrom(ax::mojom::NameFrom::kAttribute);
button_.relative_bounds.bounds = gfx::RectF(20, 20, 200, 30);
root_.child_ids.push_back(button_.id);
check_box_.role = ax::mojom::Role::kCheckBox;
check_box_.AddBoolAttribute(ax::mojom::BoolAttribute::kIsLineBreakingObject,
true);
check_box_.SetCheckedState(ax::mojom::CheckedState::kTrue);
check_box_.SetName("Check box");
// Name is not visible in the tree's text representation, i.e. it may be
// coming from an aria-label.
check_box_.SetNameFrom(ax::mojom::NameFrom::kAttribute);
check_box_.relative_bounds.bounds = gfx::RectF(20, 50, 200, 30);
root_.child_ids.push_back(check_box_.id);
text_field_.role = ax::mojom::Role::kTextField;
text_field_.AddBoolAttribute(ax::mojom::BoolAttribute::kIsLineBreakingObject,
true);
text_field_.AddState(ax::mojom::State::kEditable);
text_field_.SetValue(TEXT_VALUE);
text_field_.AddIntListAttribute(ax::mojom::IntListAttribute::kLineStarts,
std::vector<int32_t>{0, 7});
text_field_.child_ids.push_back(static_text1_.id);
text_field_.child_ids.push_back(line_break_.id);
text_field_.child_ids.push_back(static_text2_.id);
root_.child_ids.push_back(text_field_.id);
static_text1_.role = ax::mojom::Role::kStaticText;
static_text1_.AddState(ax::mojom::State::kEditable);
static_text1_.SetName("Line 1");
static_text1_.child_ids.push_back(inline_box1_.id);
static_text1_.AddIntAttribute(
ax::mojom::IntAttribute::kTextStyle,
static_cast<int32_t>(ax::mojom::TextStyle::kBold));
inline_box1_.role = ax::mojom::Role::kInlineTextBox;
inline_box1_.AddState(ax::mojom::State::kEditable);
inline_box1_.SetName("Line 1");
inline_box1_.AddIntListAttribute(ax::mojom::IntListAttribute::kSentenceStarts,
{0});
inline_box1_.AddIntListAttribute(ax::mojom::IntListAttribute::kSentenceEnds,
{6});
inline_box1_.AddIntListAttribute(ax::mojom::IntListAttribute::kWordStarts,
std::vector<int32_t>{0, 5});
inline_box1_.AddIntListAttribute(ax::mojom::IntListAttribute::kWordEnds,
std::vector<int32_t>{4, 6});
inline_box1_.AddIntAttribute(ax::mojom::IntAttribute::kNextOnLineId,
line_break_.id);
line_break_.role = ax::mojom::Role::kLineBreak;
line_break_.AddBoolAttribute(ax::mojom::BoolAttribute::kIsLineBreakingObject,
true);
line_break_.AddState(ax::mojom::State::kEditable);
line_break_.SetName("\n");
line_break_.AddIntAttribute(ax::mojom::IntAttribute::kPreviousOnLineId,
inline_box1_.id);
static_text2_.role = ax::mojom::Role::kStaticText;
static_text2_.AddState(ax::mojom::State::kEditable);
static_text2_.SetName("Line 2");
static_text2_.child_ids.push_back(inline_box2_.id);
static_text2_.AddFloatAttribute(ax::mojom::FloatAttribute::kFontSize, 1.0f);
inline_box2_.role = ax::mojom::Role::kInlineTextBox;
inline_box2_.AddState(ax::mojom::State::kEditable);
inline_box2_.SetName("Line 2");
inline_box2_.AddIntListAttribute(ax::mojom::IntListAttribute::kSentenceStarts,
{0});
inline_box2_.AddIntListAttribute(ax::mojom::IntListAttribute::kSentenceEnds,
{6});
inline_box2_.AddIntListAttribute(ax::mojom::IntListAttribute::kWordStarts,
std::vector<int32_t>{0, 5});
inline_box2_.AddIntListAttribute(ax::mojom::IntListAttribute::kWordEnds,
std::vector<int32_t>{4, 6});
AXTreeUpdate initial_state;
initial_state.root_id = 1;
initial_state.nodes = {root_, button_, check_box_,
text_field_, static_text1_, inline_box1_,
line_break_, static_text2_, inline_box2_};
initial_state.has_tree_data = true;
initial_state.tree_data.tree_id = AXTreeID::CreateNewAXTreeID();
initial_state.tree_data.parent_tree_id = views_tree->GetAXTreeID();
initial_state.tree_data.title = "Dialog title";
// "SetTree" is defined in "TestAXTreeManager" and it passes ownership of the
// created AXTree to the manager.
SetTree(std::make_unique<AXTree>(initial_state));
AXTreeUpdate views_tree_update;
web_view.AddChildTreeId(GetTreeID());
views_tree_update.nodes = {web_view};
ASSERT_TRUE(views_tree->Unserialize(views_tree_update));
views_tree_manager_ = TestAXTreeManager(std::move(views_tree));
}
std::unique_ptr<AXTree> AXPositionTest::CreateMultipageDocument(
AXNodeData& root_data,
AXNodeData& page_1_data,
AXNodeData& page_1_text_data,
AXNodeData& page_2_data,
AXNodeData& page_2_text_data,
AXNodeData& page_3_data,
AXNodeData& page_3_text_data) const {
root_data.id = 1;
root_data.role = ax::mojom::Role::kPdfRoot;
page_1_data.id = 2;
page_1_data.role = ax::mojom::Role::kRegion;
page_1_data.AddBoolAttribute(ax::mojom::BoolAttribute::kIsPageBreakingObject,
true);
page_1_text_data.id = 3;
page_1_text_data.role = ax::mojom::Role::kStaticText;
page_1_text_data.SetName("some text on page 1");
page_1_text_data.AddBoolAttribute(
ax::mojom::BoolAttribute::kIsLineBreakingObject, true);
page_1_data.child_ids = {3};
page_2_data.id = 4;
page_2_data.role = ax::mojom::Role::kRegion;
page_2_data.AddBoolAttribute(ax::mojom::BoolAttribute::kIsPageBreakingObject,
true);
page_2_text_data.id = 5;
page_2_text_data.role = ax::mojom::Role::kStaticText;
page_2_text_data.SetName("some text on page 2");
page_2_text_data.AddIntAttribute(
ax::mojom::IntAttribute::kTextStyle,
static_cast<int32_t>(ax::mojom::TextStyle::kBold));
page_2_data.child_ids = {5};
page_3_data.id = 6;
page_3_data.role = ax::mojom::Role::kRegion;
page_3_data.AddBoolAttribute(ax::mojom::BoolAttribute::kIsPageBreakingObject,
true);
page_3_text_data.id = 7;
page_3_text_data.role = ax::mojom::Role::kStaticText;
page_3_text_data.SetName("some more text on page 3");
page_3_data.child_ids = {7};
root_data.child_ids = {2, 4, 6};
return CreateAXTree({root_data, page_1_data, page_1_text_data, page_2_data,
page_2_text_data, page_3_data, page_3_text_data});
}
void AXPositionTest::CreateBrowserWindow(
AXNodeData& window,
AXNodeData& back_button,
AXNodeData& web_view,
AXNodeData& root_web_area,
AXNodeData& iframe_root,
AXNodeData& paragraph,
AXNodeData& address_bar,
std::vector<TestAXTreeManager>& out_managers) const {
// First tree: Views.
window.id = 1;
window.role = ax::mojom::Role::kWindow;
window.SetName("Test page - Google Chrome");
window.AddStringAttribute(ax::mojom::StringAttribute::kClassName,
"BrowserRootView");
AXNodeData non_client_view;
non_client_view.id = 2;
non_client_view.role = ax::mojom::Role::kClient;
non_client_view.SetName("Google Chrome");
non_client_view.AddStringAttribute(ax::mojom::StringAttribute::kClassName,
"NonClientView");
window.child_ids = {non_client_view.id};
AXNodeData browser_view;
browser_view.id = 3;
browser_view.role = ax::mojom::Role::kClient;
browser_view.AddStringAttribute(ax::mojom::StringAttribute::kClassName,
"BrowserView");
AXNodeData toolbar;
toolbar.id = 4;
toolbar.role = ax::mojom::Role::kPane;
toolbar.AddStringAttribute(ax::mojom::StringAttribute::kClassName,
"ToolbarView");
browser_view.child_ids = {toolbar.id};
back_button.id = 5;
back_button.role = ax::mojom::Role::kButton;
back_button.AddState(ax::mojom::State::kFocusable);
back_button.SetDefaultActionVerb(ax::mojom::DefaultActionVerb::kPress);
back_button.SetHasPopup(ax::mojom::HasPopup::kMenu);
back_button.SetName("Back");
back_button.SetNameFrom(ax::mojom::NameFrom::kContents);
back_button.SetDescription("Press to go back, context menu to see history");
back_button.AddStringAttribute(ax::mojom::StringAttribute::kClassName,
"ToolbarButton");
back_button.AddAction(ax::mojom::Action::kShowContextMenu);
toolbar.child_ids = {back_button.id};
web_view.id = 6;
web_view.role = ax::mojom::Role::kWebView;
web_view.AddState(ax::mojom::State::kInvisible);
web_view.SetNameExplicitlyEmpty();
web_view.AddStringAttribute(ax::mojom::StringAttribute::kClassName,
"WebView");
address_bar.id = 7;
address_bar.role = ax::mojom::Role::kTextField;
address_bar.SetName("Address and search bar");
address_bar.SetNameFrom(ax::mojom::NameFrom::kAttribute);
address_bar.SetValue("test.com");
address_bar.AddStringAttribute(ax::mojom::StringAttribute::kAutoComplete,
"both");
address_bar.AddStringAttribute(ax::mojom::StringAttribute::kClassName,
"OmniboxViewViews");
address_bar.AddAction(ax::mojom::Action::kShowContextMenu);
non_client_view.child_ids = {browser_view.id, web_view.id, address_bar.id};
// Second tree: webpage.
root_web_area.id = 1;
root_web_area.role = ax::mojom::Role::kRootWebArea;
root_web_area.AddState(ax::mojom::State::kFocusable);
root_web_area.SetName("Test page");
root_web_area.AddBoolAttribute(
ax::mojom::BoolAttribute::kIsLineBreakingObject, true);
AXNodeData iframe;
iframe.id = 2;
iframe.role = ax::mojom::Role::kIframe;
iframe.AddBoolAttribute(ax::mojom::BoolAttribute::kIsLineBreakingObject,
true);
paragraph.id = 3;
paragraph.role = ax::mojom::Role::kParagraph;
paragraph.SetName("After iframe");
paragraph.SetNameFrom(ax::mojom::NameFrom::kContents);
paragraph.AddBoolAttribute(ax::mojom::BoolAttribute::kIsLineBreakingObject,
true);
root_web_area.child_ids = {iframe.id, paragraph.id};
// Third tree: out-of-process iframe.
iframe_root.id = 1;
iframe_root.role = ax::mojom::Role::kRootWebArea;
iframe_root.AddState(ax::mojom::State::kFocusable);
iframe_root.SetName("Inside iframe");
iframe_root.SetNameFrom(ax::mojom::NameFrom::kContents);
iframe_root.AddBoolAttribute(ax::mojom::BoolAttribute::kIsLineBreakingObject,
true);
std::unique_ptr<AXTree> views_tree =
CreateAXTree({window, non_client_view, browser_view, toolbar, back_button,
web_view, address_bar});
std::unique_ptr<AXTree> webpage_tree = CreateAXTree(
{root_web_area, iframe, paragraph}, views_tree->GetAXTreeID());
std::unique_ptr<AXTree> iframe_tree =
CreateAXTree({iframe_root}, webpage_tree->GetAXTreeID());
AXTreeUpdate views_tree_update;
web_view.AddChildTreeId(webpage_tree->GetAXTreeID());
views_tree_update.nodes = {web_view};
ASSERT_TRUE(views_tree->Unserialize(views_tree_update));
AXTreeUpdate webpage_tree_update;
iframe.AddChildTreeId(iframe_tree->GetAXTreeID());
webpage_tree_update.nodes = {iframe};
ASSERT_TRUE(webpage_tree->Unserialize(webpage_tree_update));
out_managers.emplace_back(std::move(views_tree));
out_managers.emplace_back(std::move(webpage_tree));
out_managers.emplace_back(std::move(iframe_tree));
}
std::unique_ptr<AXTree> AXPositionTest::CreateMultilingualDocument(
std::vector<int>* text_offsets) const {
EXPECT_NE(nullptr, text_offsets);
text_offsets->push_back(0);
std::u16string english_text;
for (int i = 0; i < 3; ++i) {
std::u16string grapheme = base::WideToUTF16(kGraphemeClusters[i]);
EXPECT_EQ(1u, grapheme.length())
<< "All English characters should be one UTF16 code unit in length.";
text_offsets->push_back(text_offsets->back() +
static_cast<int>(grapheme.length()));
english_text.append(grapheme);
}
std::u16string hindi_text;
for (int i = 3; i < 5; ++i) {
std::u16string grapheme = base::WideToUTF16(kGraphemeClusters[i]);
EXPECT_LE(2u, grapheme.length()) << "All Hindi characters should be two "
"or more UTF16 code units in length.";
text_offsets->push_back(text_offsets->back() +
static_cast<int>(grapheme.length()));
hindi_text.append(grapheme);
}
std::u16string thai_text;
for (int i = 5; i < 8; ++i) {
std::u16string grapheme = base::WideToUTF16(kGraphemeClusters[i]);
EXPECT_LT(0u, grapheme.length())
<< "One of the Thai characters should be one UTF16 code unit, "
"whilst others should be two or more.";
text_offsets->push_back(text_offsets->back() +
static_cast<int>(grapheme.length()));
thai_text.append(grapheme);
}
AXNodeData root_data;
root_data.id = 1;
root_data.role = ax::mojom::Role::kRootWebArea;
AXNodeData text_data1;
text_data1.id = 2;
text_data1.role = ax::mojom::Role::kStaticText;
text_data1.SetName(english_text);
AXNodeData text_data2;
text_data2.id = 3;
text_data2.role = ax::mojom::Role::kStaticText;
text_data2.SetName(hindi_text);
AXNodeData text_data3;
text_data3.id = 4;
text_data3.role = ax::mojom::Role::kStaticText;
text_data3.SetName(thai_text);
root_data.child_ids = {text_data1.id, text_data2.id, text_data3.id};
return CreateAXTree({root_data, text_data1, text_data2, text_data3});
}
void AXPositionTest::AssertTextLengthEquals(const AXTree* tree,
AXNodeID node_id,
int expected_text_length) const {
TestPositionType text_position = AXNodePosition::CreateTextPosition(
tree->data().tree_id, node_id, 0 /* text_offset */,
ax::mojom::TextAffinity::kUpstream);
ASSERT_NE(nullptr, text_position);
ASSERT_TRUE(text_position->IsTextPosition());
ASSERT_EQ(expected_text_length, text_position->MaxTextOffset());
ASSERT_EQ(expected_text_length,
static_cast<int>(text_position->GetText().length()));
}
std::unique_ptr<AXTree> AXPositionTest::CreateAXTree(
const std::vector<AXNodeData>& nodes,
const AXTreeID& parent_tree_id) const {
EXPECT_FALSE(nodes.empty());
AXTreeUpdate update;
update.tree_data.tree_id = AXTreeID::CreateNewAXTreeID();
update.tree_data.parent_tree_id = parent_tree_id;
update.has_tree_data = true;
update.root_id = nodes[0].id;
update.nodes = nodes;
return std::make_unique<AXTree>(update);
}
} // namespace
// TODO(crbug.com/1370069): Re-enable this test
TEST_F(AXPositionTest, DISABLED_Clone) {
TestPositionType null_position = AXNodePosition::CreateNullPosition();
ASSERT_NE(nullptr, null_position);
TestPositionType copy_position = null_position->Clone();
ASSERT_NE(nullptr, copy_position);
EXPECT_TRUE(copy_position->IsNullPosition());
EXPECT_EQ(kInvalidAXNodeID, copy_position->anchor_id());
EXPECT_EQ(AXNodePosition::INVALID_INDEX, copy_position->child_index());
EXPECT_EQ(AXNodePosition::INVALID_OFFSET, copy_position->text_offset());
TestPositionType tree_position = AXNodePosition::CreateTreePosition(
*ax_tree(), root_.id, 0 /* child_index */);
ASSERT_NE(nullptr, tree_position);
copy_position = tree_position->Clone();
ASSERT_NE(nullptr, copy_position);
EXPECT_TRUE(copy_position->IsTreePosition());
EXPECT_EQ(root_.id, copy_position->anchor_id());
EXPECT_EQ(0, copy_position->child_index());
EXPECT_EQ(AXNodePosition::INVALID_OFFSET, copy_position->text_offset());
tree_position = AXNodePosition::CreateTreePosition(*ax_tree(), root_.id,
1 /* child_index */);
ASSERT_NE(nullptr, tree_position);
copy_position = tree_position->Clone();
ASSERT_NE(nullptr, copy_position);
EXPECT_TRUE(copy_position->IsTreePosition());
EXPECT_EQ(root_.id, copy_position->anchor_id());
EXPECT_EQ(1, copy_position->child_index());
EXPECT_EQ(AXNodePosition::INVALID_OFFSET, copy_position->text_offset());
// Expect to trigger a DCHECK for an invalid position, because the root is not
// a leaf. A non-leaf must use a child index >= 0 and <= AnchorChildOffset().
// A child index of BEFORE_TEXT can only be used with a leaf anchor.
EXPECT_DEATH_IF_SUPPORTED(
AXNodePosition::CreateTreePosition(*ax_tree(), root_.id,
AXNodePosition::BEFORE_TEXT),
"Creating invalid positions is disallowed.");
TestPositionType text_position = AXNodePosition::CreateTextPosition(
GetTreeID(), text_field_.id, 0 /* text_offset */,
ax::mojom::TextAffinity::kUpstream);
ASSERT_NE(nullptr, text_position);
ASSERT_TRUE(text_position->IsTextPosition());
copy_position = text_position->Clone();
ASSERT_NE(nullptr, copy_position);
EXPECT_TRUE(copy_position->IsTextPosition());
EXPECT_EQ(text_field_.id, copy_position->anchor_id());
EXPECT_EQ(0, copy_position->text_offset());
EXPECT_EQ(ax::mojom::TextAffinity::kUpstream, copy_position->affinity());
text_position = AXNodePosition::CreateTextPosition(
GetTreeID(), text_field_.id, 0 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_NE(nullptr, text_position);
ASSERT_TRUE(text_position->IsTextPosition());
copy_position = text_position->Clone();
ASSERT_NE(nullptr, copy_position);
EXPECT_TRUE(copy_position->IsTextPosition());
EXPECT_EQ(text_field_.id, copy_position->anchor_id());
EXPECT_EQ(0, copy_position->text_offset());
EXPECT_EQ(ax::mojom::TextAffinity::kDownstream, copy_position->affinity());
EXPECT_EQ(AXNodePosition::INVALID_INDEX, copy_position->child_index());
}
TEST_F(AXPositionTest, Serialize) {
TestPositionType null_position = AXNodePosition::CreateNullPosition();
ASSERT_NE(nullptr, null_position);
TestPositionType copy_position =
AXNodePosition::Unserialize(null_position->Serialize());
ASSERT_NE(nullptr, copy_position);
EXPECT_TRUE(copy_position->IsNullPosition());
TestPositionType tree_position = AXNodePosition::CreateTreePosition(
*ax_tree(), root_.id, 1 /* child_index */);
ASSERT_NE(nullptr, tree_position);
copy_position = AXNodePosition::Unserialize(tree_position->Serialize());
ASSERT_NE(nullptr, copy_position);
EXPECT_TRUE(copy_position->IsTreePosition());
EXPECT_EQ(root_.id, copy_position->anchor_id());
EXPECT_EQ(1, copy_position->child_index());
EXPECT_EQ(AXNodePosition::INVALID_OFFSET, copy_position->text_offset());
tree_position = AXNodePosition::CreateTreePosition(
*ax_tree(), inline_box2_.id, AXNodePosition::BEFORE_TEXT);
ASSERT_NE(nullptr, tree_position);
copy_position = AXNodePosition::Unserialize(tree_position->Serialize());
ASSERT_NE(nullptr, copy_position);
EXPECT_TRUE(copy_position->IsTreePosition());
EXPECT_EQ(inline_box2_.id, copy_position->anchor_id());
EXPECT_EQ(AXNodePosition::BEFORE_TEXT, copy_position->child_index());
EXPECT_EQ(AXNodePosition::INVALID_OFFSET, copy_position->text_offset());
TestPositionType text_position = AXNodePosition::CreateTextPosition(
GetTreeID(), text_field_.id, 0 /* text_offset */,
ax::mojom::TextAffinity::kUpstream);
ASSERT_NE(nullptr, text_position);
ASSERT_TRUE(text_position->IsTextPosition());
copy_position = AXNodePosition::Unserialize(text_position->Serialize());
ASSERT_NE(nullptr, copy_position);
EXPECT_TRUE(copy_position->IsTextPosition());
EXPECT_EQ(text_field_.id, copy_position->anchor_id());
EXPECT_EQ(0, copy_position->text_offset());
EXPECT_EQ(ax::mojom::TextAffinity::kUpstream, copy_position->affinity());
text_position = AXNodePosition::CreateTextPosition(
GetTreeID(), text_field_.id, 0 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_NE(nullptr, text_position);
ASSERT_TRUE(text_position->IsTextPosition());
copy_position = AXNodePosition::Unserialize(text_position->Serialize());
ASSERT_NE(nullptr, copy_position);
EXPECT_TRUE(copy_position->IsTextPosition());
EXPECT_EQ(text_field_.id, copy_position->anchor_id());
EXPECT_EQ(0, copy_position->text_offset());
EXPECT_EQ(ax::mojom::TextAffinity::kDownstream, copy_position->affinity());
EXPECT_EQ(AXNodePosition::INVALID_INDEX, copy_position->child_index());
}
TEST_F(AXPositionTest, ToString) {
AXNodeData root_data;
root_data.id = 1;
root_data.role = ax::mojom::Role::kRootWebArea;
AXNodeData static_text_data_1;
static_text_data_1.id = 2;
static_text_data_1.role = ax::mojom::Role::kStaticText;
static_text_data_1.SetName("some text");
AXNodeData static_text_data_2;
static_text_data_2.id = 3;
static_text_data_2.role = ax::mojom::Role::kStaticText;
static_text_data_2.SetName(u"\xfffc");
AXNodeData static_text_data_3;
static_text_data_3.id = 4;
static_text_data_3.role = ax::mojom::Role::kStaticText;
static_text_data_3.SetName("more text");
root_data.child_ids = {static_text_data_1.id, static_text_data_2.id,
static_text_data_3.id};
SetTree(CreateAXTree(
{root_data, static_text_data_1, static_text_data_2, static_text_data_3}));
TestPositionType text_position_1 = AXNodePosition::CreateTextPosition(
GetTreeID(), root_data.id, 0 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_1->IsTextPosition());
EXPECT_EQ(
"TextPosition anchor_id=1 text_offset=0 affinity=downstream "
"annotated_text=<s>ome text\xEF\xBF\xBCmore text",
text_position_1->ToString());
TestPositionType text_position_2 = AXNodePosition::CreateTextPosition(
GetTreeID(), root_data.id, 5 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_2->IsTextPosition());
EXPECT_EQ(
"TextPosition anchor_id=1 text_offset=5 affinity=downstream "
"annotated_text=some <t>ext\xEF\xBF\xBCmore text",
text_position_2->ToString());
TestPositionType text_position_3 = AXNodePosition::CreateTextPosition(
GetTreeID(), root_data.id, 9 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_3->IsTextPosition());
EXPECT_EQ(
"TextPosition anchor_id=1 text_offset=9 affinity=downstream "
"annotated_text=some text<\xEF\xBF\xBC>more text",
text_position_3->ToString());
TestPositionType text_position_4 = AXNodePosition::CreateTextPosition(
GetTreeID(), root_data.id, 10 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_4->IsTextPosition());
EXPECT_EQ(
"TextPosition anchor_id=1 text_offset=10 affinity=downstream "
"annotated_text=some text\xEF\xBF\xBC<m>ore text",
text_position_4->ToString());
TestPositionType text_position_5 = AXNodePosition::CreateTextPosition(
GetTreeID(), root_data.id, 19 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_5->IsTextPosition());
EXPECT_EQ(
"TextPosition anchor_id=1 text_offset=19 affinity=downstream "
"annotated_text=some text\xEF\xBF\xBCmore text<>",
text_position_5->ToString());
TestPositionType text_position_6 = AXNodePosition::CreateTextPosition(
GetTreeID(), static_text_data_2.id, 0 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_6->IsTextPosition());
EXPECT_EQ(
"TextPosition anchor_id=3 text_offset=0 affinity=downstream "
"annotated_text=<\xEF\xBF\xBC>",
text_position_6->ToString());
TestPositionType text_position_7 = AXNodePosition::CreateTextPosition(
GetTreeID(), static_text_data_2.id, 1 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_7->IsTextPosition());
EXPECT_EQ(
"TextPosition anchor_id=3 text_offset=1 affinity=downstream "
"annotated_text=\xEF\xBF\xBC<>",
text_position_7->ToString());
TestPositionType text_position_8 = AXNodePosition::CreateTextPosition(
GetTreeID(), static_text_data_3.id, 0 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_8->IsTextPosition());
EXPECT_EQ(
"TextPosition anchor_id=4 text_offset=0 affinity=downstream "
"annotated_text=<m>ore text",
text_position_8->ToString());
TestPositionType text_position_9 = AXNodePosition::CreateTextPosition(
GetTreeID(), static_text_data_3.id, 5 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_9->IsTextPosition());
EXPECT_EQ(
"TextPosition anchor_id=4 text_offset=5 affinity=downstream "
"annotated_text=more <t>ext",
text_position_9->ToString());
TestPositionType text_position_10 = AXNodePosition::CreateTextPosition(
GetTreeID(), static_text_data_3.id, 9 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_10->IsTextPosition());
EXPECT_EQ(
"TextPosition anchor_id=4 text_offset=9 affinity=downstream "
"annotated_text=more text<>",
text_position_10->ToString());
}
// TODO(crbug.com/1370069): Re-enable this test
TEST_F(AXPositionTest, DISABLED_IsIgnored) {
EXPECT_FALSE(AXNodePosition::CreateNullPosition()->IsIgnored());
// We now need to update the tree structure to test ignored tree and text
// positions.
//
// ++root_data
// ++++static_text_data_1 "One" ignored
// ++++++inline_box_data_1 "One" ignored
// ++++container_data ignored
// ++++++static_text_data_2 "Two"
// ++++++++inline_box_data_2 "Two"
AXNodeData root_data;
root_data.id = 1;
root_data.role = ax::mojom::Role::kRootWebArea;
AXNodeData static_text_data_1;
static_text_data_1.id = 2;
static_text_data_1.role = ax::mojom::Role::kStaticText;
static_text_data_1.SetName("One");
static_text_data_1.AddState(ax::mojom::State::kIgnored);
AXNodeData inline_box_data_1;
inline_box_data_1.id = 3;
inline_box_data_1.role = ax::mojom::Role::kInlineTextBox;
inline_box_data_1.SetName("One");
inline_box_data_1.AddState(ax::mojom::State::kIgnored);
AXNodeData container_data;
container_data.id = 4;
container_data.role = ax::mojom::Role::kGenericContainer;
container_data.AddState(ax::mojom::State::kIgnored);
AXNodeData static_text_data_2;
static_text_data_2.id = 5;
static_text_data_2.role = ax::mojom::Role::kStaticText;
static_text_data_2.SetName("Two");
AXNodeData inline_box_data_2;
inline_box_data_2.id = 6;
inline_box_data_2.role = ax::mojom::Role::kInlineTextBox;
inline_box_data_2.SetName("Two");
static_text_data_1.child_ids = {inline_box_data_1.id};
container_data.child_ids = {static_text_data_2.id};
static_text_data_2.child_ids = {inline_box_data_2.id};
root_data.child_ids = {static_text_data_1.id, container_data.id};
SetTree(
CreateAXTree({root_data, static_text_data_1, inline_box_data_1,
container_data, static_text_data_2, inline_box_data_2}));
//
// Text positions.
//
// A "before text" position on the root should not be ignored, despite the
// fact that the leaf equivalent position is, because AXPosition always
// adjusts to an unignored position if asked to find the leaf equivalent
// position. In other words, the text of ignored leaves is not propagated to
// the inner text of their ancestors.
// Create a text position before the letter "T" in "Two".
TestPositionType text_position_3 = AXNodePosition::CreateTextPosition(
GetTreeID(), root_data.id, 0 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_3->IsTextPosition());
// Since the leaf node containing the text that is pointed to is not ignored,
// but only a generic container that is in between this position and the leaf
// node, this position should not be ignored.
EXPECT_FALSE(text_position_3->IsIgnored());
// Create a text position before the letter "w" in "Two".
TestPositionType text_position_4 = AXNodePosition::CreateTextPosition(
GetTreeID(), root_data.id, 1 /* text_offset */,
ax::mojom::TextAffinity::kDownstream);
ASSERT_TRUE(text_position_4->IsTextPosition());