1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "build/build_config.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_commands.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/common/pref_names.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "chrome/test/base/ui_test_utils.h"
#include "components/prefs/pref_service.h"
#include "content/public/browser/browser_accessibility_state.h"
#include "content/public/test/accessibility_notification_waiter.h"
#include "content/public/test/browser_test.h"
#if BUILDFLAG(IS_CHROMEOS)
#include "chrome/browser/ash/accessibility/accessibility_manager.h"
#include "chrome/browser/ash/accessibility/chromevox_test_utils.h"
#include "chrome/browser/ash/accessibility/speech_monitor.h"
#include "extensions/browser/browsertest_util.h"
#include "extensions/common/constants.h"
#else
#include <optional>
#include "content/public/test/scoped_accessibility_mode_override.h"
#endif // BUILDFLAG(IS_CHROMEOS)
#if !BUILDFLAG(IS_ANDROID)
#include "chrome/browser/accessibility/accessibility_labels_service.h"
#include "chrome/browser/accessibility/accessibility_labels_service_factory.h"
#endif
class AccessibilityLabelsBrowserTest : public InProcessBrowserTest {
public:
AccessibilityLabelsBrowserTest() = default;
AccessibilityLabelsBrowserTest(const AccessibilityLabelsBrowserTest&) =
delete;
AccessibilityLabelsBrowserTest& operator=(
const AccessibilityLabelsBrowserTest&) = delete;
// InProcessBrowserTest overrides:
void TearDownOnMainThread() override { EnableScreenReader(false); }
void EnableScreenReader(bool enabled) {
#if BUILDFLAG(IS_CHROMEOS)
if (!enabled) {
ash::AccessibilityManager::Get()->EnableSpokenFeedback(false);
return;
}
chromevox_test_utils_ = std::make_unique<ash::ChromeVoxTestUtils>();
chromevox_test_utils_->EnableChromeVox();
// Note: we can safely call `Replay` here since none of these tests make
// speech assertions.
chromevox_test_utils_->sm()->Replay();
#else
// Spoof a screen reader.
if (!enabled) {
screen_reader_override_.reset();
} else if (!screen_reader_override_) {
screen_reader_override_.emplace(ui::AXMode::kWebContents |
ui::AXMode::kExtendedProperties);
}
#endif // BUILDFLAG(IS_CHROMEOS)
}
private:
#if BUILDFLAG(IS_CHROMEOS)
std::unique_ptr<ash::ChromeVoxTestUtils> chromevox_test_utils_;
#else
std::optional<content::ScopedAccessibilityModeOverride>
screen_reader_override_;
#endif
};
// Changing the kAccessibilityImageLabelsEnabled pref should affect the
// accessibility mode of a new WebContents for this profile.
IN_PROC_BROWSER_TEST_F(AccessibilityLabelsBrowserTest, NewWebContents) {
EnableScreenReader(true);
ui::AXMode ax_mode =
content::BrowserAccessibilityState::GetInstance()->GetAccessibilityMode();
EXPECT_FALSE(ax_mode.has_mode(ui::AXMode::kLabelImages));
chrome::NewTab(browser());
content::WebContents* web_contents =
browser()->tab_strip_model()->GetActiveWebContents();
ax_mode = web_contents->GetAccessibilityMode();
EXPECT_FALSE(ax_mode.has_mode(ui::AXMode::kLabelImages));
browser()->profile()->GetPrefs()->SetBoolean(
prefs::kAccessibilityImageLabelsEnabled, true);
chrome::NewTab(browser());
web_contents = browser()->tab_strip_model()->GetActiveWebContents();
// Wait for ChromeVox to attach to the new tab if needed.
if (!web_contents->GetAccessibilityMode().has_mode(
ui::AXMode::kExtendedProperties)) {
content::AccessibilityNotificationWaiter waiter(web_contents);
ASSERT_TRUE(waiter.WaitForNotification());
}
ax_mode = web_contents->GetAccessibilityMode();
EXPECT_TRUE(ax_mode.has_mode(ui::AXMode::kLabelImages));
browser()->profile()->GetPrefs()->SetBoolean(
prefs::kAccessibilityImageLabelsEnabled, false);
chrome::NewTab(browser());
web_contents = browser()->tab_strip_model()->GetActiveWebContents();
// Wait for ChromeVox to attach to the new tab if needed.
if (!web_contents->GetAccessibilityMode().has_mode(
ui::AXMode::kExtendedProperties)) {
content::AccessibilityNotificationWaiter waiter(web_contents);
ASSERT_TRUE(waiter.WaitForNotification());
}
ax_mode = web_contents->GetAccessibilityMode();
EXPECT_FALSE(ax_mode.has_mode(ui::AXMode::kLabelImages));
}
// Changing the kAccessibilityImageLabelsEnabled pref should affect the
// accessibility mode of existing WebContents in this profile.
IN_PROC_BROWSER_TEST_F(AccessibilityLabelsBrowserTest, ExistingWebContents) {
EnableScreenReader(true);
content::WebContents* web_contents =
browser()->tab_strip_model()->GetActiveWebContents();
ui::AXMode ax_mode = web_contents->GetAccessibilityMode();
EXPECT_FALSE(ax_mode.has_mode(ui::AXMode::kLabelImages));
browser()->profile()->GetPrefs()->SetBoolean(
prefs::kAccessibilityImageLabelsEnabled, true);
ax_mode = web_contents->GetAccessibilityMode();
EXPECT_TRUE(ax_mode.has_mode(ui::AXMode::kLabelImages));
browser()->profile()->GetPrefs()->SetBoolean(
prefs::kAccessibilityImageLabelsEnabled, false);
ax_mode = web_contents->GetAccessibilityMode();
EXPECT_FALSE(ax_mode.has_mode(ui::AXMode::kLabelImages));
}
#if !BUILDFLAG(IS_ANDROID)
IN_PROC_BROWSER_TEST_F(AccessibilityLabelsBrowserTest, EnableOnce) {
EnableScreenReader(true);
content::WebContents* web_contents =
browser()->tab_strip_model()->GetActiveWebContents();
ui::AXMode ax_mode = web_contents->GetAccessibilityMode();
EXPECT_FALSE(ax_mode.has_mode(ui::AXMode::kLabelImages));
Profile* const profile =
Profile::FromBrowserContext(web_contents->GetBrowserContext());
auto* const labels_service =
AccessibilityLabelsServiceFactory::GetForProfile(profile);
labels_service->EnableLabelsServiceOnce(web_contents);
// EnableOnce does not change the mode flags for the WebContents, so it's not
// trivial to verify that the change took place.
}
#endif
IN_PROC_BROWSER_TEST_F(AccessibilityLabelsBrowserTest,
NotEnabledWithoutScreenReader) {
EnableScreenReader(false);
content::WebContents* web_contents =
browser()->tab_strip_model()->GetActiveWebContents();
ui::AXMode ax_mode = web_contents->GetAccessibilityMode();
EXPECT_FALSE(ax_mode.has_mode(ui::AXMode::kLabelImages));
browser()->profile()->GetPrefs()->SetBoolean(
prefs::kAccessibilityImageLabelsEnabled, true);
ax_mode = web_contents->GetAccessibilityMode();
EXPECT_FALSE(ax_mode.has_mode(ui::AXMode::kLabelImages));
// Reset state.
browser()->profile()->GetPrefs()->SetBoolean(
prefs::kAccessibilityImageLabelsEnabled, false);
}
// Turning on the preference while a screenreader is present should enable the
// feature for existing tabs.
IN_PROC_BROWSER_TEST_F(AccessibilityLabelsBrowserTest,
PRE_EnabledByPreference) {
EnableScreenReader(true);
// The preference is not yet set, so the feature is off.
auto* const web_contents =
browser()->tab_strip_model()->GetActiveWebContents();
EXPECT_FALSE(
web_contents->GetAccessibilityMode().has_mode(ui::AXMode::kLabelImages));
browser()->profile()->GetPrefs()->SetBoolean(
prefs::kAccessibilityImageLabelsEnabled, true);
// Now the feature is on.
EXPECT_TRUE(
web_contents->GetAccessibilityMode().has_mode(ui::AXMode::kLabelImages));
}
// When the preference is present at startup, the feature should become enabled
// when a screenreader is discovered.
IN_PROC_BROWSER_TEST_F(AccessibilityLabelsBrowserTest, EnabledByPreference) {
// The preference was set for the profile by PRE_EnabledByPreference.
ASSERT_TRUE(browser()->profile()->GetPrefs()->GetBoolean(
prefs::kAccessibilityImageLabelsEnabled));
auto* const web_contents =
browser()->tab_strip_model()->GetActiveWebContents();
// If the test is run without --force-renderer-accessibility, then no screen
// reader should have been detected yet, and the feature should be off.
if (!content::BrowserAccessibilityState::GetInstance()
->GetAccessibilityMode()
.has_mode(ui::AXMode::kExtendedProperties)) {
EXPECT_FALSE(web_contents->GetAccessibilityMode().has_mode(
ui::AXMode::kLabelImages));
EnableScreenReader(true);
}
// Now the feature is on.
EXPECT_TRUE(
web_contents->GetAccessibilityMode().has_mode(ui::AXMode::kLabelImages));
}
|
