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.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.view.Display.DEFAULT_DISPLAY;
 import static android.view.View.VISIBLE;

 import android.content.res.Configuration;
 import android.graphics.Rect;
 import android.hardware.display.DisplayManagerGlobal;
 import android.view.Display;
 import android.view.DisplayInfo;
 import org.junit.Assert;
 import org.junit.After;
 import org.junit.Before;
 import org.mockito.MockitoAnnotations;

 import android.content.Context;
 import android.support.test.InstrumentationRegistry;
 import android.view.IWindow;
 import android.view.WindowManager;

 import static android.app.AppOpsManager.OP_NONE;
 import static android.view.DisplayAdjustments.DEFAULT_DISPLAY_ADJUSTMENTS;
 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 org.mockito.Mockito.mock;

 import com.android.server.AttributeCache;

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

 /**
  * Common base class for window manager unit test classes.
  */
 class WindowTestsBase {
     static WindowManagerService sWm = null;
     private static final IWindow sIWindow = new TestIWindow();
     private static Session sMockSession;
     // 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;

     private static boolean sOneTimeSetupDone = false;
     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;

     private final SurfaceAnimationRunner mSurfaceAnimationRunner;

     public WindowTestsBase() {
         this(new SurfaceAnimationRunner());
     }

     public WindowTestsBase(SurfaceAnimationRunner surfaceAnimationRunner) {
         mSurfaceAnimationRunner = surfaceAnimationRunner;
     }

     @Before
     public void setUp() throws Exception {
         if (!sOneTimeSetupDone) {
             sOneTimeSetupDone = true;

             // Allows to mock package local classes and methods
             System.setProperty("dexmaker.share_classloader", "true");
             MockitoAnnotations.initMocks(this);
             sMockSession = mock(Session.class);
         }

         final Context context = InstrumentationRegistry.getTargetContext();
         AttributeCache.init(context);

         sWm = TestWindowManagerPolicy.getWindowManagerService(context, mSurfaceAnimationRunner);
         beforeCreateDisplay();

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

         // Set-up some common windows.
         mCommonWindows = new HashSet();
         mWallpaperWindow = createCommonWindow(null, TYPE_WALLPAPER, "wallpaperWindow");
         mImeWindow = createCommonWindow(null, TYPE_INPUT_METHOD, "mImeWindow");
         sWm.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();
     }

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

     @After
     public void tearDown() throws Exception {
         final LinkedList<WindowState> nonCommonWindows = new LinkedList();

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

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

             mDisplayContent.removeImmediately();
             sWm.mInputMethodTarget = null;
         }

         // Wait until everything is really cleaned up.
         waitUntilHandlersIdle();
     }

     /**
      * @return A SurfaceBuilderFactory to inject in to the WindowManagerService during
      *         set-up (or null).
      */
     SurfaceBuilderFactory getSurfaceBuilderFactory() {
         return null;
     }

     private WindowState createCommonWindow(WindowState parent, int type, String name) {
         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;
     }

     /** Asserts that the first entry is greater than the second entry. */
     void assertGreaterThan(int first, int second) throws Exception {
         Assert.assertTrue("Excepted " + first + " to be greater than " + second, first > second);
     }

     /** Asserts that the first entry is greater than the second entry. */
     void assertLessThan(int first, int second) throws Exception {
         Assert.assertTrue("Excepted " + first + " to be less than " + second, first < second);
     }

     /**
      * Waits until the main handler for WM has processed all messages.
      */
     void waitUntilHandlersIdle() {
         sWm.mH.runWithScissors(() -> { }, 0);
         sWm.mAnimationHandler.runWithScissors(() -> { }, 0);
         SurfaceAnimationThread.getHandler().runWithScissors(() -> { }, 0);
     }

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

         final TaskStack stack =
                 createStackControllerOnStackOnDisplay(windowingMode, activityType, dc).mContainer;
         final Task task = createTaskInStack(stack, 0 /* userId */);
         final WindowTestUtils.TestAppWindowToken token = new WindowTestUtils.TestAppWindowToken(dc);
         task.addChild(token, 0);
         return token;
     }

     WindowState createWindow(WindowState parent, int type, String name) {
         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) {
         final WindowToken token = createWindowToken(dc, windowingMode, activityType, type);
         return createWindow(parent, type, token, name);
     }

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

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

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

     static WindowState createWindow(WindowState parent, int type, WindowToken token, String name,
             int ownerId, boolean ownerCanAddInternalSystemWindow) {
         final WindowManager.LayoutParams attrs = new WindowManager.LayoutParams(type);
         attrs.setTitle(name);

         final WindowState w = new WindowState(sWm, sMockSession, sIWindow, token, parent, OP_NONE,
                 0, attrs, VISIBLE, ownerId, ownerCanAddInternalSystemWindow);
         // 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) {
         return createStackControllerOnDisplay(dc).mContainer;
     }

     StackWindowController createStackControllerOnDisplay(DisplayContent dc) {
         return createStackControllerOnStackOnDisplay(
                 WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, dc);
     }

     StackWindowController createStackControllerOnStackOnDisplay(
             int windowingMode, int activityType, DisplayContent dc) {
         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(), sWm);
         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(sWm, stack, userId);
     }

     /** Creates a {@link DisplayContent} and adds it to the system. */
     DisplayContent createNewDisplay() {
         final int displayId = sNextDisplayId++;
         final Display display = new Display(DisplayManagerGlobal.getInstance(), displayId,
                 mDisplayInfo, DEFAULT_DISPLAY_ADJUSTMENTS);
         return new DisplayContent(display, sWm, new WallpaperController(sWm));
     }

     /** Creates a {@link com.android.server.wm.WindowTestUtils.TestWindowState} */
     WindowTestUtils.TestWindowState createWindowState(WindowManager.LayoutParams attrs,
             WindowToken token) {
         return new WindowTestUtils.TestWindowState(sWm, sMockSession, sIWindow, 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.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
	import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
	import static android.view.Display.DEFAULT_DISPLAY;
	import static android.view.View.VISIBLE;

	import android.content.res.Configuration;
	import android.graphics.Rect;
	import android.hardware.display.DisplayManagerGlobal;
	import android.view.Display;
	import android.view.DisplayInfo;
	import org.junit.Assert;
	import org.junit.After;
	import org.junit.Before;
	import org.mockito.MockitoAnnotations;

	import android.content.Context;
	import android.support.test.InstrumentationRegistry;
	import android.view.IWindow;
	import android.view.WindowManager;

	import static android.app.AppOpsManager.OP_NONE;
	import static android.view.DisplayAdjustments.DEFAULT_DISPLAY_ADJUSTMENTS;
	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 org.mockito.Mockito.mock;

	import com.android.server.AttributeCache;

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

	/**
	* Common base class for window manager unit test classes.
	*/
	class WindowTestsBase {
	static WindowManagerService sWm = null;
	private static final IWindow sIWindow = new TestIWindow();
	private static Session sMockSession;
	// 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;

	private static boolean sOneTimeSetupDone = false;
	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;

	private final SurfaceAnimationRunner mSurfaceAnimationRunner;

	public WindowTestsBase() {
	this(new SurfaceAnimationRunner());
	}

	public WindowTestsBase(SurfaceAnimationRunner surfaceAnimationRunner) {
	mSurfaceAnimationRunner = surfaceAnimationRunner;
	}

	@Before
	public void setUp() throws Exception {
	if (!sOneTimeSetupDone) {
	sOneTimeSetupDone = true;

	// Allows to mock package local classes and methods
	System.setProperty("dexmaker.share_classloader", "true");
	MockitoAnnotations.initMocks(this);
	sMockSession = mock(Session.class);
	}

	final Context context = InstrumentationRegistry.getTargetContext();
	AttributeCache.init(context);

	sWm = TestWindowManagerPolicy.getWindowManagerService(context, mSurfaceAnimationRunner);
	beforeCreateDisplay();

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

	// Set-up some common windows.
	mCommonWindows = new HashSet();
	mWallpaperWindow = createCommonWindow(null, TYPE_WALLPAPER, "wallpaperWindow");
	mImeWindow = createCommonWindow(null, TYPE_INPUT_METHOD, "mImeWindow");
	sWm.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();
	}

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

	@After
	public void tearDown() throws Exception {
	final LinkedList<WindowState> nonCommonWindows = new LinkedList();

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

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

	mDisplayContent.removeImmediately();
	sWm.mInputMethodTarget = null;
	}

	// Wait until everything is really cleaned up.
	waitUntilHandlersIdle();
	}

	/**
	* @return A SurfaceBuilderFactory to inject in to the WindowManagerService during
	* set-up (or null).
	*/
	SurfaceBuilderFactory getSurfaceBuilderFactory() {
	return null;
	}

	private WindowState createCommonWindow(WindowState parent, int type, String name) {
	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;
	}

	/** Asserts that the first entry is greater than the second entry. */
	void assertGreaterThan(int first, int second) throws Exception {
	Assert.assertTrue("Excepted " + first + " to be greater than " + second, first > second);
	}

	/** Asserts that the first entry is greater than the second entry. */
	void assertLessThan(int first, int second) throws Exception {
	Assert.assertTrue("Excepted " + first + " to be less than " + second, first < second);
	}

	/**
	* Waits until the main handler for WM has processed all messages.
	*/
	void waitUntilHandlersIdle() {
	sWm.mH.runWithScissors(() -> { }, 0);
	sWm.mAnimationHandler.runWithScissors(() -> { }, 0);
	SurfaceAnimationThread.getHandler().runWithScissors(() -> { }, 0);
	}

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

	final TaskStack stack =
	createStackControllerOnStackOnDisplay(windowingMode, activityType, dc).mContainer;
	final Task task = createTaskInStack(stack, 0 /* userId */);
	final WindowTestUtils.TestAppWindowToken token = new WindowTestUtils.TestAppWindowToken(dc);
	task.addChild(token, 0);
	return token;
	}

	WindowState createWindow(WindowState parent, int type, String name) {
	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) {
	final WindowToken token = createWindowToken(dc, windowingMode, activityType, type);
	return createWindow(parent, type, token, name);
	}

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

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

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

	static WindowState createWindow(WindowState parent, int type, WindowToken token, String name,
	int ownerId, boolean ownerCanAddInternalSystemWindow) {
	final WindowManager.LayoutParams attrs = new WindowManager.LayoutParams(type);
	attrs.setTitle(name);

	final WindowState w = new WindowState(sWm, sMockSession, sIWindow, token, parent, OP_NONE,
	0, attrs, VISIBLE, ownerId, ownerCanAddInternalSystemWindow);
	// 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) {
	return createStackControllerOnDisplay(dc).mContainer;
	}

	StackWindowController createStackControllerOnDisplay(DisplayContent dc) {
	return createStackControllerOnStackOnDisplay(
	WINDOWING_MODE_FULLSCREEN, ACTIVITY_TYPE_STANDARD, dc);
	}

	StackWindowController createStackControllerOnStackOnDisplay(
	int windowingMode, int activityType, DisplayContent dc) {
	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(), sWm);
	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(sWm, stack, userId);
	}

	/** Creates a {@link DisplayContent} and adds it to the system. */
	DisplayContent createNewDisplay() {
	final int displayId = sNextDisplayId++;
	final Display display = new Display(DisplayManagerGlobal.getInstance(), displayId,
	mDisplayInfo, DEFAULT_DISPLAY_ADJUSTMENTS);
	return new DisplayContent(display, sWm, new WallpaperController(sWm));
	}

	/** Creates a {@link com.android.server.wm.WindowTestUtils.TestWindowState} */
	WindowTestUtils.TestWindowState createWindowState(WindowManager.LayoutParams attrs,
	WindowToken token) {
	return new WindowTestUtils.TestWindowState(sWm, sMockSession, sIWindow, attrs, token);
	}

	}