Add an accessibility alert for incorrect use of some accelerators.

ash/accelerators/accelerator_controller_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/accelerators/accelerator_table.h"
 #include "ash/accessibility_delegate.h"
 #include "ash/ash_switches.h"
 #include "ash/caps_lock_delegate.h"
 #include "ash/display/display_manager.h"
@@ skipping 1312 matching lines @@
     EXPECT_EQ(1, delegate->handle_volume_down_count());
     EXPECT_EQ(volume_down, delegate->last_accelerator());
     EXPECT_EQ(0, delegate->handle_volume_up_count());
     EXPECT_TRUE(ProcessWithContext(volume_up));
     EXPECT_EQ(1, delegate->handle_volume_up_count());
     EXPECT_EQ(volume_up, delegate->last_accelerator());
   }
 }
 #endif
 
+TEST_F(AcceleratorControllerTest, DisallowedWithNoWindow) {
+  const ui::Accelerator dummy;
+  AccessibilityDelegate* delegate =
+      ash::Shell::GetInstance()->accessibility_delegate();
+
+  for (size_t i = 0; i < kActionsNeedingWindowLength; ++i) {
+    delegate->TriggerAccessibilityAlert(A11Y_ALERT_NONE);
+    EXPECT_TRUE(
+        GetController()->PerformAction(kActionsNeedingWindow[i], dummy));
+    EXPECT_EQ(delegate->GetLastAccessibilityAlert(), A11Y_ALERT_WINDOW_NEEDED);
+  }
+
+  // Make sure we don't alert if we do have a window.
+  scoped_ptr<aura::Window> window(
+      CreateTestWindowInShellWithBounds(gfx::Rect(5, 5, 20, 20)));
+  wm::ActivateWindow(window.get());
+  for (size_t i = 0; i < kActionsNeedingWindowLength; ++i) {
+    delegate->TriggerAccessibilityAlert(A11Y_ALERT_NONE);
+    GetController()->PerformAction(kActionsNeedingWindow[i], dummy);
+    EXPECT_EQ(delegate->GetLastAccessibilityAlert(), A11Y_ALERT_NONE);
+  }
+
+  // Don't alert if we have a minimized window either.
+  GetController()->PerformAction(WINDOW_MINIMIZE, dummy);
+  for (size_t i = 0; i < kActionsNeedingWindowLength; ++i) {
+    delegate->TriggerAccessibilityAlert(A11Y_ALERT_NONE);
+    GetController()->PerformAction(kActionsNeedingWindow[i], dummy);
+    EXPECT_EQ(delegate->GetLastAccessibilityAlert(), A11Y_ALERT_NONE);
+  }
+}
+
 }  // namespace ash