Show a notification when a braille display is connected.

chrome/browser/chromeos/system/tray_accessibility_browsertest.cc

Index: chrome/browser/chromeos/system/tray_accessibility_browsertest.cc
diff --git a/chrome/browser/chromeos/system/tray_accessibility_browsertest.cc b/chrome/browser/chromeos/system/tray_accessibility_browsertest.cc
index e7f1ef4f48794c24238b80fa50470065b40b6054..c21660ba17e7e7d37251bee9403e8696e8481fd9 100644
--- a/chrome/browser/chromeos/system/tray_accessibility_browsertest.cc
+++ b/chrome/browser/chromeos/system/tray_accessibility_browsertest.cc
@@ -10,6 +10,7 @@
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
+#include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
@@ -19,6 +20,7 @@
 #include "chrome/browser/chromeos/login/startup_utils.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/login/user_manager_impl.h"
+#include "chrome/browser/extensions/api/braille_display_private/mock_braille_controller.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_switches.h"
@@ -34,8 +36,12 @@
 #include "content/public/test/test_utils.h"
 #include "policy/policy_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/views/controls/label.h"
 #include "ui/views/widget/widget.h"
 
+using extensions::api::braille_display_private::BrailleObserver;
+using extensions::api::braille_display_private::DisplayState;
+using extensions::api::braille_display_private::MockBrailleController;
 using testing::Return;
 using testing::_;
 using testing::WithParamInterface;
@@ -58,13 +64,14 @@ class TrayAccessibilityTest
   TrayAccessibilityTest() {}
   virtual ~TrayAccessibilityTest() {}
 
-  // The profile which should be used by tese tests.
+  // The profile which should be used by these tests.
   Profile* GetProfile() { return ProfileManager::GetActiveUserProfile(); }
 
   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
     EXPECT_CALL(provider_, IsInitializationComplete(_))
         .WillRepeatedly(Return(true));
     policy::BrowserPolicyConnector::SetPolicyProviderForTesting(&provider_);
+    AccessibilityManager::SetBrailleControllerForTest(&braille_controller_);
   }
 
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
@@ -84,6 +91,10 @@ class TrayAccessibilityTest
     InProcessBrowserTest::RunTestOnMainThreadLoop();
   }
 
+  virtual void CleanUpOnMainThread() OVERRIDE {
+    AccessibilityManager::SetBrailleControllerForTest(NULL);
+  }
+
   void SetShowAccessibilityOptionsInSystemTrayMenu(bool value) {
     if (GetParam() == PREF_SERVICE) {
       PrefService* prefs = GetProfile()->GetPrefs();
@@ -222,7 +233,26 @@ class TrayAccessibilityTest
     return tray()->detailed_menu_->virtual_keyboard_view_;
   }
 
+  bool NotificationShown() {
+    return (tray()->detailed_popup_ &&
+            !tray()->detailed_popup_->GetWidget()->IsClosed());
+  }
+
+  base::string16 GetNotificationText() {
+    if (NotificationShown())
+      return tray()->detailed_popup_->GetLabelForTest()->text();
+    else
+      return base::string16();
+  }
+
+  void SetBrailleConnected(bool connected) {
+    braille_controller_.SetAvailable(connected);
+    braille_controller_.GetObserver()->OnDisplayStateChanged(
+        *braille_controller_.GetDisplayState());
+  }
+
   policy::MockConfigurationPolicyProvider provider_;
+  MockBrailleController braille_controller_;
 };
 
 IN_PROC_BROWSER_TEST_P(TrayAccessibilityTest, LoginStatus) {
@@ -508,6 +538,43 @@ IN_PROC_BROWSER_TEST_P(TrayAccessibilityTest, ShowMenuWithShowOnLoginScreen) {
   EXPECT_TRUE(CanCreateMenuItem());
 }
 
+IN_PROC_BROWSER_TEST_P(TrayAccessibilityTest, ShowNotification) {
+  const base::string16 BRAILLE_CONNECTED =
+      base::ASCIIToUTF16("Braille display connected.");
+  const base::string16 CHROMEVOX_ENABLED = base::ASCIIToUTF16(
+      "ChromeVox (spoken feedback) is enabled.\nPress Ctrl+Alt+Z to disable.");
+  const base::string16 BRAILLE_CONNECTED_AND_CHROMEVOX_ENABLED(
+      BRAILLE_CONNECTED + base::ASCIIToUTF16(" ") + CHROMEVOX_ENABLED);
+
+  EXPECT_FALSE(AccessibilityManager::Get()->IsSpokenFeedbackEnabled());
+
+  // Enabling spoken feedback should show the notification.
+  AccessibilityManager::Get()->EnableSpokenFeedback(
+      true, ash::A11Y_NOTIFICATION_SHOW);
+  EXPECT_EQ(CHROMEVOX_ENABLED, GetNotificationText());
+
+  // Connecting a braille display when spoken feedback is already enabled
+  // should only show the message about the braille display.
+  SetBrailleConnected(true);
+  EXPECT_EQ(BRAILLE_CONNECTED, GetNotificationText());
+
+  // Neither disconnecting a braille display, nor disabling spoken feedback
+  // should show any notification.
+  SetBrailleConnected(false);
+  EXPECT_TRUE(AccessibilityManager::Get()->IsSpokenFeedbackEnabled());
+  EXPECT_FALSE(NotificationShown());
+  AccessibilityManager::Get()->EnableSpokenFeedback(
+      false, ash::A11Y_NOTIFICATION_SHOW);
+  EXPECT_FALSE(NotificationShown());
+  EXPECT_FALSE(AccessibilityManager::Get()->IsSpokenFeedbackEnabled());
+
+  // Connecting a braille display should enable spoken feedback and show
+  // both messages.
+  SetBrailleConnected(true);
+  EXPECT_TRUE(AccessibilityManager::Get()->IsSpokenFeedbackEnabled());
+  EXPECT_EQ(BRAILLE_CONNECTED_AND_CHROMEVOX_ENABLED, GetNotificationText());
+}
+
 IN_PROC_BROWSER_TEST_P(TrayAccessibilityTest, KeepMenuVisibilityOnLockScreen) {
   // Enables high contrast mode.
   AccessibilityManager::Get()->EnableHighContrast(true);