chromeos: Ignore power button presses when screen is off.

ash/wm/power_button_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/wm/power_button_controller.h"
 
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time.h"
@@ skipping 521 matching lines @@
   controller_->OnPowerButtonEvent(true, base::TimeTicks::Now());
   EXPECT_EQ(Shell::GetRootWindow()->bounds().ToString(),
             test_api_->GetBackgroundLayerBounds().ToString());
 
   const gfx::Size kNewSize(400, 300);
   Shell::GetRootWindow()->SetHostSize(kNewSize);
   EXPECT_EQ(gfx::Rect(kNewSize).ToString(),
             test_api_->GetBackgroundLayerBounds().ToString());
 }
 
+// Test that we ignore power button presses when the screen is turned off.
+TEST_F(PowerButtonControllerTest, IgnorePowerButtonIfScreenIsOff) {
+  controller_->OnLoginStateChanged(user::LOGGED_IN_USER);
+
+  // When the screen brightness is at 0%, we shouldn't do anything in response
+  // to power button presses.
+  controller_->OnScreenBrightnessChanged(0.0);
+  controller_->OnPowerButtonEvent(true, base::TimeTicks::Now());
+  EXPECT_FALSE(test_api_->lock_timer_is_running());
+
+  // After increasing the brightness to 10%, we should start the timer like
+  // usual.
+  controller_->OnScreenBrightnessChanged(10.0);
+  controller_->OnPowerButtonEvent(true, base::TimeTicks::Now());
+  EXPECT_TRUE(test_api_->lock_timer_is_running());
+}
+
 }  // namespace test
 }  // namespace ash