Hook up TABLET_MODE switch to maximize_mode_controller

ash/wm/maximize_mode/maximize_mode_controller_unittest.cc

 // Copyright 2014 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/maximize_mode/maximize_mode_controller.h"
 
 #include <math.h>
 #include <utility>
 #include <vector>
 
@@ skipping 123 matching lines @@
     DCHECK(degrees <= 360.0f);
 
     float radians = degrees * kDegreesToRadians;
     gfx::Vector3dF base_vector(0.0f, -kMeanGravity, 0.0f);
     gfx::Vector3dF lid_vector(0.0f,
                               kMeanGravity * cos(radians),
                               kMeanGravity * sin(radians));
     TriggerBaseAndLidUpdate(base_vector, lid_vector);
   }
 
+  void HoldDeviceVertical() {
+    gfx::Vector3dF base_vector(9.8f, 0.0f, 0.0f);
+    gfx::Vector3dF lid_vector(9.8f, 0.0f, 0.0f);
+    TriggerBaseAndLidUpdate(base_vector, lid_vector);
+  }
+
   void OpenLid() {
     maximize_mode_controller()->LidEventReceived(true /* open */,
         maximize_mode_controller()->tick_clock_->NowTicks());
   }
 
   void CloseLid() {
     maximize_mode_controller()->LidEventReceived(false /* open */,
         maximize_mode_controller()->tick_clock_->NowTicks());
   }
 
   bool WasLidOpenedRecently() {
     return maximize_mode_controller()->WasLidOpenedRecently();
   }
 
+  void SetTabletMode(bool on) {
+    maximize_mode_controller()->TabletModeEventReceived(
+        on, maximize_mode_controller()->tick_clock_->NowTicks());
+  }
+
   bool AreEventsBlocked() {
     return !!maximize_mode_controller()->event_blocker_.get();
   }
 
   base::UserActionTester* user_action_tester() { return &user_action_tester_; }
 
  private:
   base::SimpleTestTickClock* test_tick_clock_;
 
   // Tracks user action counts.
@@ skipping 91 matching lines @@
 
   // 1 second after lid open.
   AdvanceTickClock(base::TimeDelta::FromSeconds(1));
   EXPECT_TRUE(WasLidOpenedRecently());
 
   // 3 seconds after lid open.
   AdvanceTickClock(base::TimeDelta::FromSeconds(2));
   EXPECT_FALSE(WasLidOpenedRecently());
 }
 
+TEST_F(MaximizeModeControllerTest, TabletModeTransition) {
+  OpenLidToAngle(90.0f);
+  EXPECT_FALSE(IsMaximizeModeStarted());
+
+  // Unstable reading. This should not trigger maximize mode.
+  HoldDeviceVertical();
+  EXPECT_FALSE(IsMaximizeModeStarted());
+
+  // When tablet mode switch is on it should force maximize mode even if the
+  // reading is not stable.
+  SetTabletMode(true);
+  EXPECT_TRUE(IsMaximizeModeStarted());
+
+  // After tablet mode switch is off it should stay in maximize mode if the
+  // reading is not stable.
+  SetTabletMode(false);
+  EXPECT_TRUE(IsMaximizeModeStarted());
+
+  // Should leave maximize mode when the lid angle is small enough.
+  OpenLidToAngle(90.0f);
+  EXPECT_FALSE(IsMaximizeModeStarted());
+
+  OpenLidToAngle(300.0f);
+  EXPECT_TRUE(IsMaximizeModeStarted());
+}
+
 // Verify the maximize mode enter/exit thresholds for stable angles.
 TEST_F(MaximizeModeControllerTest, StableHingeAnglesWithLidOpened) {
   ASSERT_FALSE(IsMaximizeModeStarted());
   ASSERT_FALSE(WasLidOpenedRecently());
 
   OpenLidToAngle(180.0f);
   EXPECT_FALSE(IsMaximizeModeStarted());
 
   OpenLidToAngle(315.0f);
   EXPECT_TRUE(IsMaximizeModeStarted());
@@ skipping 213 matching lines @@
 // accelerometer updates which would normally cause it to exit do not.
 TEST_F(MaximizeModeControllerSwitchesTest, IgnoreHingeAngles) {
   maximize_mode_controller()->EnableMaximizeModeWindowManager(true);
 
   // Would normally trigger an exit from maximize mode.
   OpenLidToAngle(90.0f);
   EXPECT_TRUE(IsMaximizeModeStarted());
 }
 
 }  // namespace ash