services/tests/servicestests/src/com/android/server/wm/WindowTestsBase.java - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2016 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.server.wm;

 import static android.app.AppOpsManager.OP_NONE;
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.view.Display.DEFAULT_DISPLAY;
 import static android.view.DisplayAdjustments.DEFAULT_DISPLAY_ADJUSTMENTS;
 import static android.view.View.VISIBLE;
 import static android.view.WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW;
 import static android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
 import static android.view.WindowManager.LayoutParams.LAST_APPLICATION_WINDOW;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_ATTACHED_DIALOG;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA_OVERLAY;
 import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
 import static android.view.WindowManager.LayoutParams.TYPE_DOCK_DIVIDER;
 import static android.view.WindowManager.LayoutParams.TYPE_INPUT_METHOD;
 import static android.view.WindowManager.LayoutParams.TYPE_INPUT_METHOD_DIALOG;
 import static android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR;
 import static android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR;
 import static android.view.WindowManager.LayoutParams.TYPE_WALLPAPER;

 import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;

 import static org.mockito.Mockito.mock;

 import android.content.Context;
 import android.content.res.Configuration;
 import android.graphics.Rect;
 import android.hardware.display.DisplayManagerGlobal;
 import android.testing.DexmakerShareClassLoaderRule;
 import android.util.Log;
 import android.view.Display;
 import android.view.DisplayInfo;
 import android.view.IWindow;
 import android.view.WindowManager;

 import com.android.server.AttributeCache;

 import org.junit.After;
 import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Rule;

 import java.util.HashSet;
 import java.util.LinkedList;

 /**
  * Common base class for window manager unit test classes.
  *
  * Make sure any requests to WM hold the WM lock if needed b/73966377
  */
 class WindowTestsBase {
     private static final String TAG = WindowTestsBase.class.getSimpleName();

     WindowManagerService mWm;
     private final IWindow mIWindow = new TestIWindow();
     private Session mMockSession;
     // The default display is removed in {@link #setUp} and then we iterate over all displays to
     // make sure we don't collide with any existing display. If we run into no other display, the
     // added display should be treated as default. This cannot be the default display
     private static int sNextDisplayId = DEFAULT_DISPLAY + 1;
     static int sNextStackId = 1000;

     /** Non-default display. */
     DisplayContent mDisplayContent;
     DisplayInfo mDisplayInfo = new DisplayInfo();
     WindowState mWallpaperWindow;
     WindowState mImeWindow;
     WindowState mImeDialogWindow;
     WindowState mStatusBarWindow;
     WindowState mDockedDividerWindow;
     WindowState mNavBarWindow;
     WindowState mAppWindow;
     WindowState mChildAppWindowAbove;
     WindowState mChildAppWindowBelow;
     HashSet<WindowState> mCommonWindows;
     WallpaperController mWallpaperController;

     @Rule
     public final DexmakerShareClassLoaderRule mDexmakerShareClassLoaderRule =
             new DexmakerShareClassLoaderRule();

     @Rule
     public final WindowManagerServiceRule mWmRule = new WindowManagerServiceRule();

     static WindowState.PowerManagerWrapper sPowerManagerWrapper;  // TODO(roosa): make non-static.

     @BeforeClass
     public static void setUpOnceBase() {
         AttributeCache.init(getInstrumentation().getTargetContext());
         sPowerManagerWrapper = mock(WindowState.PowerManagerWrapper.class);
     }

     @Before
     public void setUpBase() {
         // If @Before throws an exception, the error isn't logged. This will make sure any failures
         // in the set up are clear. This can be removed when b/37850063 is fixed.
         try {
             mMockSession = mock(Session.class);

             final Context context = getInstrumentation().getTargetContext();

             mWm = mWmRule.getWindowManagerService();
             beforeCreateDisplay();

             mWallpaperController = new WallpaperController(mWm);

             context.getDisplay().getDisplayInfo(mDisplayInfo);
             mDisplayContent = createNewDisplay();
             mWm.mDisplayEnabled = true;
             mWm.mDisplayReady = true;

             // Set-up some common windows.
             mCommonWindows = new HashSet<>();
             synchronized (mWm.mGlobalLock) {
                 mWallpaperWindow = createCommonWindow(null, TYPE_WALLPAPER, "wallpaperWindow");
                 mImeWindow = createCommonWindow(null, TYPE_INPUT_METHOD, "mImeWindow");
                 mDisplayContent.mInputMethodWindow = mImeWindow;
                 mImeDialogWindow = createCommonWindow(null, TYPE_INPUT_METHOD_DIALOG,
                         "mImeDialogWindow");
                 mStatusBarWindow = createCommonWindow(null, TYPE_STATUS_BAR, "mStatusBarWindow");
                 mNavBarWindow = createCommonWindow(null, TYPE_NAVIGATION_BAR, "mNavBarWindow");
                 mDockedDividerWindow = createCommonWindow(null, TYPE_DOCK_DIVIDER,
                         "mDockedDividerWindow");
                 mAppWindow = createCommonWindow(null, TYPE_BASE_APPLICATION, "mAppWindow");
                 mChildAppWindowAbove = createCommonWindow(mAppWindow,
                         TYPE_APPLICATION_ATTACHED_DIALOG,
                         "mChildAppWindowAbove");
                 mChildAppWindowBelow = createCommonWindow(mAppWindow,
                         TYPE_APPLICATION_MEDIA_OVERLAY,
                         "mChildAppWindowBelow");
             }
             // Adding a display will cause freezing the display. Make sure to wait until it's
             // unfrozen to not run into race conditions with the tests.
             waitUntilHandlersIdle();
         } catch (Exception e) {
             Log.e(TAG, "Failed to set up test", e);
             throw e;
         }
     }

     void beforeCreateDisplay() {
         // Called before display is created.
     }

     @After
     public void tearDownBase() {
         // If @After throws an exception, the error isn't logged. This will make sure any failures
         // in the tear down are clear. This can be removed when b/37850063 is fixed.
         try {
             // Test may schedule to perform surface placement or other messages. Wait until a
             // stable state to clean up for consistency.
             waitUntilHandlersIdle();

             final LinkedList<WindowState> nonCommonWindows = new LinkedList<>();

             synchronized (mWm.mGlobalLock) {
                 mWm.mRoot.forAllWindows(w -> {
                     if (!mCommonWindows.contains(w)) {
                         nonCommonWindows.addLast(w);
                     }
                 }, true /* traverseTopToBottom */);

                 while (!nonCommonWindows.isEmpty()) {
                     nonCommonWindows.pollLast().removeImmediately();
                 }

                 for (int i = mWm.mRoot.mChildren.size() - 1; i >= 0; --i) {
                     final DisplayContent displayContent = mWm.mRoot.mChildren.get(i);
                     if (!displayContent.isDefaultDisplay) {
                         displayContent.removeImmediately();
                     }
                 }
                 // Remove app transition & window freeze timeout callbacks to prevent unnecessary
                 // actions after test.
                 mWm.getDefaultDisplayContentLocked().mAppTransition
                         .removeAppTransitionTimeoutCallbacks();
                 mWm.mH.removeMessages(WindowManagerService.H.WINDOW_FREEZE_TIMEOUT);
                 mWm.mInputMethodTarget = null;
             }

             // Wait until everything is really cleaned up.
             waitUntilHandlersIdle();
         } catch (Exception e) {
             Log.e(TAG, "Failed to tear down test", e);
             throw e;
         }
     }

     private WindowState createCommonWindow(WindowState parent, int type, String name) {
         synchronized (mWm.mGlobalLock) {
             final WindowState win = createWindow(parent, type, name);
             mCommonWindows.add(win);
             // Prevent common windows from been IMe targets
             win.mAttrs.flags |= FLAG_NOT_FOCUSABLE;
             return win;
         }
     }

     /**
      * Waits until the main handler for WM has processed all messages.
      */
     void waitUntilHandlersIdle() {
         mWmRule.waitUntilWindowManagerHandlersIdle();
     }

     private WindowToken createWindowToken(
             DisplayContent dc, int windowingMode, int activityType, int type) {
         synchronized (mWm.mGlobalLock) {
             if (type < FIRST_APPLICATION_WINDOW || type > LAST_APPLICATION_WINDOW) {
                 return WindowTestUtils.createTestWindowToken(type, dc);
             }

             return createAppWindowToken(dc, windowingMode, activityType);
         }
     }

     AppWindowToken createAppWindowToken(DisplayContent dc, int windowingMode, int activityType) {
         return createTestAppWindowToken(dc, windowingMode, activityType);
     }

     WindowTestUtils.TestAppWindowToken createTestAppWindowToken(DisplayContent dc, int
             windowingMode, int activityType) {
         final TaskStack stack = createStackControllerOnStackOnDisplay(windowingMode, activityType,
                 dc).mContainer;
         final Task task = createTaskInStack(stack, 0 /* userId */);
         final WindowTestUtils.TestAppWindowToken appWindowToken =
                 WindowTestUtils.createTestAppWindowToken(dc);
         task.addChild(appWindowToken, 0);
         return appWindowToken;
     }

     WindowState createWindow(WindowState parent, int type, String name) {
         synchronized (mWm.mGlobalLock) {
             return (parent == null)
                     ? createWindow(parent, type, mDisplayContent, name)
                     : createWindow(parent, type, parent.mToken, name);
         }
     }

     WindowState createWindowOnStack(WindowState parent, int windowingMode, int activityType,
             int type, DisplayContent dc, String name) {
         synchronized (mWm.mGlobalLock) {
             final WindowToken token = createWindowToken(dc, windowingMode, activityType, type);
             return createWindow(parent, type, token, name);
         }
     }

     WindowState createAppWindow(Task task, int type, String name) {
         synchronized (mWm.mGlobalLock) {
             final AppWindowToken token = WindowTestUtils.createTestAppWindowToken(mDisplayContent);
             task.addChild(token, 0);
             return createWindow(null, type, token, name);
         }
     }

     WindowState createWindow(WindowState parent, int type, DisplayContent dc, String name) {
         synchronized (mWm.mGlobalLock) {
             final WindowToken token = createWindowToken(
                     dc, WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, type);
             return createWindow(parent, type, token, name);
         }
     }

     WindowState createWindow(WindowState parent, int type, DisplayContent dc, String name,
             boolean ownerCanAddInternalSystemWindow) {
         synchronized (mWm.mGlobalLock) {
             final WindowToken token = createWindowToken(
                     dc, WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, type);
             return createWindow(parent, type, token, name, 0 /* ownerId */,
                     ownerCanAddInternalSystemWindow);
         }
     }

     WindowState createWindow(WindowState parent, int type, WindowToken token, String name) {
         synchronized (mWm.mGlobalLock) {
             return createWindow(parent, type, token, name, 0 /* ownerId */,
                     false /* ownerCanAddInternalSystemWindow */);
         }
     }

     WindowState createWindow(WindowState parent, int type, WindowToken token, String name,
             int ownerId, boolean ownerCanAddInternalSystemWindow) {
         return createWindow(parent, type, token, name, ownerId, ownerCanAddInternalSystemWindow,
                 mWm, mMockSession, mIWindow);
     }

     static WindowState createWindow(WindowState parent, int type, WindowToken token,
             String name, int ownerId, boolean ownerCanAddInternalSystemWindow,
             WindowManagerService service, Session session, IWindow iWindow) {
         synchronized (service.mGlobalLock) {
             final WindowManager.LayoutParams attrs = new WindowManager.LayoutParams(type);
             attrs.setTitle(name);

             final WindowState w = new WindowState(service, session, iWindow, token, parent,
                     OP_NONE,
                     0, attrs, VISIBLE, ownerId, ownerCanAddInternalSystemWindow,
                     sPowerManagerWrapper);
             // TODO: Probably better to make this call in the WindowState ctor to avoid errors with
             // adding it to the token...
             token.addWindow(w);
             return w;
         }
     }

     /** Creates a {@link TaskStack} and adds it to the specified {@link DisplayContent}. */
     TaskStack createTaskStackOnDisplay(DisplayContent dc) {
         synchronized (mWm.mGlobalLock) {
             return createStackControllerOnDisplay(dc).mContainer;
         }
     }

     StackWindowController createStackControllerOnDisplay(DisplayContent dc) {
         synchronized (mWm.mGlobalLock) {
             return createStackControllerOnStackOnDisplay(
                     WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, dc);
         }
     }

     StackWindowController createStackControllerOnStackOnDisplay(
             int windowingMode, int activityType, DisplayContent dc) {
         synchronized (mWm.mGlobalLock) {
             final Configuration overrideConfig = new Configuration();
             overrideConfig.windowConfiguration.setWindowingMode(windowingMode);
             overrideConfig.windowConfiguration.setActivityType(activityType);
             final int stackId = ++sNextStackId;
             final StackWindowController controller = new StackWindowController(stackId, null,
                     dc.getDisplayId(), true /* onTop */, new Rect(), mWm);
             controller.onOverrideConfigurationChanged(overrideConfig);
             return controller;
         }
     }

     /** Creates a {@link Task} and adds it to the specified {@link TaskStack}. */
     Task createTaskInStack(TaskStack stack, int userId) {
         return WindowTestUtils.createTaskInStack(mWm, stack, userId);
     }

     /** Creates a {@link DisplayContent} and adds it to the system. */
     DisplayContent createNewDisplay() {
         return createNewDisplay(mDisplayInfo);
     }

     /** Creates a {@link DisplayContent} and adds it to the system. */
     DisplayContent createNewDisplay(DisplayInfo displayInfo) {
         final int displayId = sNextDisplayId++;
         final Display display = new Display(DisplayManagerGlobal.getInstance(), displayId,
                 displayInfo, DEFAULT_DISPLAY_ADJUSTMENTS);
         synchronized (mWm.mGlobalLock) {
             return new DisplayContent(display, mWm, mWallpaperController,
                     mock(DisplayWindowController.class));
         }
     }

     /**
      * Creates a {@link DisplayContent} with given display state and adds it to the system.
      *
      * Unlike {@link #createNewDisplay()} that uses a mock {@link DisplayWindowController} to
      * initialize {@link DisplayContent}, this method used real controller object when the test
      * need to verify its related flows.
      *
      * @param displayState For initializing the state of the display. See
      *                     {@link Display#getState()}.
      */
     DisplayContent createNewDisplayWithController(int displayState) {
         // Leverage main display info & initialize it with display state for given displayId.
         DisplayInfo displayInfo = new DisplayInfo();
         displayInfo.copyFrom(mDisplayInfo);
         displayInfo.state = displayState;
         final int displayId = sNextDisplayId++;
         final Display display = new Display(DisplayManagerGlobal.getInstance(), displayId,
                 displayInfo, DEFAULT_DISPLAY_ADJUSTMENTS);
         final DisplayWindowController dcw = new DisplayWindowController(display, mWm);
         synchronized (mWm.mGlobalLock) {
             // Display creation is driven by DisplayWindowController via ActivityStackSupervisor.
             // We skip those steps here.
             return mWm.mRoot.createDisplayContent(display, dcw);
         }
     }

     /** Creates a {@link com.android.server.wm.WindowTestUtils.TestWindowState} */
     WindowTestUtils.TestWindowState createWindowState(WindowManager.LayoutParams attrs,
             WindowToken token) {
         synchronized (mWm.mGlobalLock) {
             return new WindowTestUtils.TestWindowState(mWm, mMockSession, mIWindow, attrs, token);
         }
     }
 }
	/*
	* Copyright (C) 2016 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.server.wm;

	import static android.app.AppOpsManager.OP_NONE;
	import static android.app.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
	import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
	import static android.view.Display.DEFAULT_DISPLAY;
	import static android.view.DisplayAdjustments.DEFAULT_DISPLAY_ADJUSTMENTS;
	import static android.view.View.VISIBLE;
	import static android.view.WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW;
	import static android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
	import static android.view.WindowManager.LayoutParams.LAST_APPLICATION_WINDOW;
	import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_ATTACHED_DIALOG;
	import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA_OVERLAY;
	import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
	import static android.view.WindowManager.LayoutParams.TYPE_DOCK_DIVIDER;
	import static android.view.WindowManager.LayoutParams.TYPE_INPUT_METHOD;
	import static android.view.WindowManager.LayoutParams.TYPE_INPUT_METHOD_DIALOG;
	import static android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR;
	import static android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR;
	import static android.view.WindowManager.LayoutParams.TYPE_WALLPAPER;

	import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;

	import static org.mockito.Mockito.mock;

	import android.content.Context;
	import android.content.res.Configuration;
	import android.graphics.Rect;
	import android.hardware.display.DisplayManagerGlobal;
	import android.testing.DexmakerShareClassLoaderRule;
	import android.util.Log;
	import android.view.Display;
	import android.view.DisplayInfo;
	import android.view.IWindow;
	import android.view.WindowManager;

	import com.android.server.AttributeCache;

	import org.junit.After;
	import org.junit.Before;
	import org.junit.BeforeClass;
	import org.junit.Rule;

	import java.util.HashSet;
	import java.util.LinkedList;

	/**
	* Common base class for window manager unit test classes.
	*
	* Make sure any requests to WM hold the WM lock if needed b/73966377
	*/
	class WindowTestsBase {
	private static final String TAG = WindowTestsBase.class.getSimpleName();

	WindowManagerService mWm;
	private final IWindow mIWindow = new TestIWindow();
	private Session mMockSession;
	// The default display is removed in {@link #setUp} and then we iterate over all displays to
	// make sure we don't collide with any existing display. If we run into no other display, the
	// added display should be treated as default. This cannot be the default display
	private static int sNextDisplayId = DEFAULT_DISPLAY + 1;
	static int sNextStackId = 1000;

	/** Non-default display. */
	DisplayContent mDisplayContent;
	DisplayInfo mDisplayInfo = new DisplayInfo();
	WindowState mWallpaperWindow;
	WindowState mImeWindow;
	WindowState mImeDialogWindow;
	WindowState mStatusBarWindow;
	WindowState mDockedDividerWindow;
	WindowState mNavBarWindow;
	WindowState mAppWindow;
	WindowState mChildAppWindowAbove;
	WindowState mChildAppWindowBelow;
	HashSet<WindowState> mCommonWindows;
	WallpaperController mWallpaperController;

	@Rule
	public final DexmakerShareClassLoaderRule mDexmakerShareClassLoaderRule =
	new DexmakerShareClassLoaderRule();

	@Rule
	public final WindowManagerServiceRule mWmRule = new WindowManagerServiceRule();

	static WindowState.PowerManagerWrapper sPowerManagerWrapper; // TODO(roosa): make non-static.

	@BeforeClass
	public static void setUpOnceBase() {
	AttributeCache.init(getInstrumentation().getTargetContext());
	sPowerManagerWrapper = mock(WindowState.PowerManagerWrapper.class);
	}

	@Before
	public void setUpBase() {
	// If @Before throws an exception, the error isn't logged. This will make sure any failures
	// in the set up are clear. This can be removed when b/37850063 is fixed.
	try {
	mMockSession = mock(Session.class);

	final Context context = getInstrumentation().getTargetContext();

	mWm = mWmRule.getWindowManagerService();
	beforeCreateDisplay();

	mWallpaperController = new WallpaperController(mWm);

	context.getDisplay().getDisplayInfo(mDisplayInfo);
	mDisplayContent = createNewDisplay();
	mWm.mDisplayEnabled = true;
	mWm.mDisplayReady = true;

	// Set-up some common windows.
	mCommonWindows = new HashSet<>();
	synchronized (mWm.mGlobalLock) {
	mWallpaperWindow = createCommonWindow(null, TYPE_WALLPAPER, "wallpaperWindow");
	mImeWindow = createCommonWindow(null, TYPE_INPUT_METHOD, "mImeWindow");
	mDisplayContent.mInputMethodWindow = mImeWindow;
	mImeDialogWindow = createCommonWindow(null, TYPE_INPUT_METHOD_DIALOG,
	"mImeDialogWindow");
	mStatusBarWindow = createCommonWindow(null, TYPE_STATUS_BAR, "mStatusBarWindow");
	mNavBarWindow = createCommonWindow(null, TYPE_NAVIGATION_BAR, "mNavBarWindow");
	mDockedDividerWindow = createCommonWindow(null, TYPE_DOCK_DIVIDER,
	"mDockedDividerWindow");
	mAppWindow = createCommonWindow(null, TYPE_BASE_APPLICATION, "mAppWindow");
	mChildAppWindowAbove = createCommonWindow(mAppWindow,
	TYPE_APPLICATION_ATTACHED_DIALOG,
	"mChildAppWindowAbove");
	mChildAppWindowBelow = createCommonWindow(mAppWindow,
	TYPE_APPLICATION_MEDIA_OVERLAY,
	"mChildAppWindowBelow");
	}
	// Adding a display will cause freezing the display. Make sure to wait until it's
	// unfrozen to not run into race conditions with the tests.
	waitUntilHandlersIdle();
	} catch (Exception e) {
	Log.e(TAG, "Failed to set up test", e);
	throw e;
	}
	}

	void beforeCreateDisplay() {
	// Called before display is created.
	}

	@After
	public void tearDownBase() {
	// If @After throws an exception, the error isn't logged. This will make sure any failures
	// in the tear down are clear. This can be removed when b/37850063 is fixed.
	try {
	// Test may schedule to perform surface placement or other messages. Wait until a
	// stable state to clean up for consistency.
	waitUntilHandlersIdle();

	final LinkedList<WindowState> nonCommonWindows = new LinkedList<>();

	synchronized (mWm.mGlobalLock) {
	mWm.mRoot.forAllWindows(w -> {
	if (!mCommonWindows.contains(w)) {
	nonCommonWindows.addLast(w);
	}
	}, true /* traverseTopToBottom */);

	while (!nonCommonWindows.isEmpty()) {
	nonCommonWindows.pollLast().removeImmediately();
	}

	for (int i = mWm.mRoot.mChildren.size() - 1; i >= 0; --i) {
	final DisplayContent displayContent = mWm.mRoot.mChildren.get(i);
	if (!displayContent.isDefaultDisplay) {
	displayContent.removeImmediately();
	}
	}
	// Remove app transition & window freeze timeout callbacks to prevent unnecessary
	// actions after test.
	mWm.getDefaultDisplayContentLocked().mAppTransition
	.removeAppTransitionTimeoutCallbacks();
	mWm.mH.removeMessages(WindowManagerService.H.WINDOW_FREEZE_TIMEOUT);
	mWm.mInputMethodTarget = null;
	}

	// Wait until everything is really cleaned up.
	waitUntilHandlersIdle();
	} catch (Exception e) {
	Log.e(TAG, "Failed to tear down test", e);
	throw e;
	}
	}

	private WindowState createCommonWindow(WindowState parent, int type, String name) {
	synchronized (mWm.mGlobalLock) {
	final WindowState win = createWindow(parent, type, name);
	mCommonWindows.add(win);
	// Prevent common windows from been IMe targets
	win.mAttrs.flags \|= FLAG_NOT_FOCUSABLE;
	return win;
	}
	}

	/**
	* Waits until the main handler for WM has processed all messages.
	*/
	void waitUntilHandlersIdle() {
	mWmRule.waitUntilWindowManagerHandlersIdle();
	}

	private WindowToken createWindowToken(
	DisplayContent dc, int windowingMode, int activityType, int type) {
	synchronized (mWm.mGlobalLock) {
	if (type < FIRST_APPLICATION_WINDOW \|\| type > LAST_APPLICATION_WINDOW) {
	return WindowTestUtils.createTestWindowToken(type, dc);
	}

	return createAppWindowToken(dc, windowingMode, activityType);
	}
	}

	AppWindowToken createAppWindowToken(DisplayContent dc, int windowingMode, int activityType) {
	return createTestAppWindowToken(dc, windowingMode, activityType);
	}

	WindowTestUtils.TestAppWindowToken createTestAppWindowToken(DisplayContent dc, int
	windowingMode, int activityType) {
	final TaskStack stack = createStackControllerOnStackOnDisplay(windowingMode, activityType,
	dc).mContainer;
	final Task task = createTaskInStack(stack, 0 /* userId */);
	final WindowTestUtils.TestAppWindowToken appWindowToken =
	WindowTestUtils.createTestAppWindowToken(dc);
	task.addChild(appWindowToken, 0);
	return appWindowToken;
	}

	WindowState createWindow(WindowState parent, int type, String name) {
	synchronized (mWm.mGlobalLock) {
	return (parent == null)
	? createWindow(parent, type, mDisplayContent, name)
	: createWindow(parent, type, parent.mToken, name);
	}
	}

	WindowState createWindowOnStack(WindowState parent, int windowingMode, int activityType,
	int type, DisplayContent dc, String name) {
	synchronized (mWm.mGlobalLock) {
	final WindowToken token = createWindowToken(dc, windowingMode, activityType, type);
	return createWindow(parent, type, token, name);
	}
	}

	WindowState createAppWindow(Task task, int type, String name) {
	synchronized (mWm.mGlobalLock) {
	final AppWindowToken token = WindowTestUtils.createTestAppWindowToken(mDisplayContent);
	task.addChild(token, 0);
	return createWindow(null, type, token, name);
	}
	}

	WindowState createWindow(WindowState parent, int type, DisplayContent dc, String name) {
	synchronized (mWm.mGlobalLock) {
	final WindowToken token = createWindowToken(
	dc, WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, type);
	return createWindow(parent, type, token, name);
	}
	}

	WindowState createWindow(WindowState parent, int type, DisplayContent dc, String name,
	boolean ownerCanAddInternalSystemWindow) {
	synchronized (mWm.mGlobalLock) {
	final WindowToken token = createWindowToken(
	dc, WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, type);
	return createWindow(parent, type, token, name, 0 /* ownerId */,
	ownerCanAddInternalSystemWindow);
	}
	}

	WindowState createWindow(WindowState parent, int type, WindowToken token, String name) {
	synchronized (mWm.mGlobalLock) {
	return createWindow(parent, type, token, name, 0 /* ownerId */,
	false /* ownerCanAddInternalSystemWindow */);
	}
	}

	WindowState createWindow(WindowState parent, int type, WindowToken token, String name,
	int ownerId, boolean ownerCanAddInternalSystemWindow) {
	return createWindow(parent, type, token, name, ownerId, ownerCanAddInternalSystemWindow,
	mWm, mMockSession, mIWindow);
	}

	static WindowState createWindow(WindowState parent, int type, WindowToken token,
	String name, int ownerId, boolean ownerCanAddInternalSystemWindow,
	WindowManagerService service, Session session, IWindow iWindow) {
	synchronized (service.mGlobalLock) {
	final WindowManager.LayoutParams attrs = new WindowManager.LayoutParams(type);
	attrs.setTitle(name);

	final WindowState w = new WindowState(service, session, iWindow, token, parent,
	OP_NONE,
	0, attrs, VISIBLE, ownerId, ownerCanAddInternalSystemWindow,
	sPowerManagerWrapper);
	// TODO: Probably better to make this call in the WindowState ctor to avoid errors with
	// adding it to the token...
	token.addWindow(w);
	return w;
	}
	}

	/** Creates a {@link TaskStack} and adds it to the specified {@link DisplayContent}. */
	TaskStack createTaskStackOnDisplay(DisplayContent dc) {
	synchronized (mWm.mGlobalLock) {
	return createStackControllerOnDisplay(dc).mContainer;
	}
	}

	StackWindowController createStackControllerOnDisplay(DisplayContent dc) {
	synchronized (mWm.mGlobalLock) {
	return createStackControllerOnStackOnDisplay(
	WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, dc);
	}
	}

	StackWindowController createStackControllerOnStackOnDisplay(
	int windowingMode, int activityType, DisplayContent dc) {
	synchronized (mWm.mGlobalLock) {
	final Configuration overrideConfig = new Configuration();
	overrideConfig.windowConfiguration.setWindowingMode(windowingMode);
	overrideConfig.windowConfiguration.setActivityType(activityType);
	final int stackId = ++sNextStackId;
	final StackWindowController controller = new StackWindowController(stackId, null,
	dc.getDisplayId(), true /* onTop */, new Rect(), mWm);
	controller.onOverrideConfigurationChanged(overrideConfig);
	return controller;
	}
	}

	/** Creates a {@link Task} and adds it to the specified {@link TaskStack}. */
	Task createTaskInStack(TaskStack stack, int userId) {
	return WindowTestUtils.createTaskInStack(mWm, stack, userId);
	}

	/** Creates a {@link DisplayContent} and adds it to the system. */
	DisplayContent createNewDisplay() {
	return createNewDisplay(mDisplayInfo);
	}

	/** Creates a {@link DisplayContent} and adds it to the system. */
	DisplayContent createNewDisplay(DisplayInfo displayInfo) {
	final int displayId = sNextDisplayId++;
	final Display display = new Display(DisplayManagerGlobal.getInstance(), displayId,
	displayInfo, DEFAULT_DISPLAY_ADJUSTMENTS);
	synchronized (mWm.mGlobalLock) {
	return new DisplayContent(display, mWm, mWallpaperController,
	mock(DisplayWindowController.class));
	}
	}

	/**
	* Creates a {@link DisplayContent} with given display state and adds it to the system.
	*
	* Unlike {@link #createNewDisplay()} that uses a mock {@link DisplayWindowController} to
	* initialize {@link DisplayContent}, this method used real controller object when the test
	* need to verify its related flows.
	*
	* @param displayState For initializing the state of the display. See
	* {@link Display#getState()}.
	*/
	DisplayContent createNewDisplayWithController(int displayState) {
	// Leverage main display info & initialize it with display state for given displayId.
	DisplayInfo displayInfo = new DisplayInfo();
	displayInfo.copyFrom(mDisplayInfo);
	displayInfo.state = displayState;
	final int displayId = sNextDisplayId++;
	final Display display = new Display(DisplayManagerGlobal.getInstance(), displayId,
	displayInfo, DEFAULT_DISPLAY_ADJUSTMENTS);
	final DisplayWindowController dcw = new DisplayWindowController(display, mWm);
	synchronized (mWm.mGlobalLock) {
	// Display creation is driven by DisplayWindowController via ActivityStackSupervisor.
	// We skip those steps here.
	return mWm.mRoot.createDisplayContent(display, dcw);
	}
	}

	/** Creates a {@link com.android.server.wm.WindowTestUtils.TestWindowState} */
	WindowTestUtils.TestWindowState createWindowState(WindowManager.LayoutParams attrs,
	WindowToken token) {
	synchronized (mWm.mGlobalLock) {
	return new WindowTestUtils.TestWindowState(mWm, mMockSession, mIWindow, attrs, token);
	}
	}
	}