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Commit 9acf675d authored by Shivangi Dubey's avatar Shivangi Dubey Committed by Android (Google) Code Review
Browse files

Merge "Selectively expect device to stay awake on fold" into 24D1-dev

parents a68db76d b204db1e

services/core/java/com/android/server/display/DisplayManagerService.java

+2 −1
Original line number Diff line number Diff line
@@ -145,6 +145,7 @@ import android.window.ScreenCapture; 
import com.android.internal.annotations.GuardedBy;

import com.android.internal.annotations.VisibleForTesting;

import com.android.internal.display.BrightnessSynchronizer;

import com.android.internal.foldables.FoldGracePeriodProvider;

import com.android.internal.foldables.FoldLockSettingAvailabilityProvider;

import com.android.internal.os.BackgroundThread;

import com.android.internal.util.ArrayUtils;
@@ -573,7 +574,7 @@ public final class DisplayManagerService extends SystemService { 
        mUiHandler = UiThread.getHandler();

        mDisplayDeviceRepo = new DisplayDeviceRepository(mSyncRoot, mPersistentDataStore);

        mLogicalDisplayMapper = new LogicalDisplayMapper(mContext,

                foldSettingProvider,

                foldSettingProvider, new FoldGracePeriodProvider(),

                mDisplayDeviceRepo, new LogicalDisplayListener(), mSyncRoot, mHandler, mFlags);

        mDisplayModeDirector = new DisplayModeDirector(context, mHandler, mFlags);

        mBrightnessSynchronizer = new BrightnessSynchronizer(mContext,

services/core/java/com/android/server/display/LogicalDisplayMapper.java

+30 −10
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ import android.view.DisplayAddress; 
import android.view.DisplayInfo;



import com.android.internal.annotations.VisibleForTesting;

import com.android.internal.foldables.FoldGracePeriodProvider;

import com.android.server.display.feature.DisplayManagerFlags;

import com.android.server.display.layout.DisplayIdProducer;

import com.android.server.display.layout.Layout;
@@ -120,7 +121,7 @@ class LogicalDisplayMapper implements DisplayDeviceRepository.Listener { 
    /**

     * Sleep the device when transitioning into these device state.

     */

    private final SparseBooleanArray mDeviceStatesOnWhichToSleep;

    private final SparseBooleanArray mDeviceStatesOnWhichToSelectiveSleep;



    /**

     * Map of all logical displays indexed by logical display id.
@@ -153,6 +154,7 @@ class LogicalDisplayMapper implements DisplayDeviceRepository.Listener { 
    private final DisplayManagerService.SyncRoot mSyncRoot;

    private final LogicalDisplayMapperHandler mHandler;

    private final FoldSettingProvider mFoldSettingProvider;

    private final FoldGracePeriodProvider mFoldGracePeriodProvider;

    private final PowerManager mPowerManager;



    /**
@@ -200,15 +202,18 @@ class LogicalDisplayMapper implements DisplayDeviceRepository.Listener { 
    private final DisplayManagerFlags mFlags;



    LogicalDisplayMapper(@NonNull Context context, FoldSettingProvider foldSettingProvider,

            FoldGracePeriodProvider foldGracePeriodProvider,

            @NonNull DisplayDeviceRepository repo,

            @NonNull Listener listener, @NonNull DisplayManagerService.SyncRoot syncRoot,

            @NonNull Handler handler, DisplayManagerFlags flags) {

        this(context, foldSettingProvider, repo, listener, syncRoot, handler,

        this(context, foldSettingProvider, foldGracePeriodProvider, repo, listener, syncRoot,

                handler,

                new DeviceStateToLayoutMap((isDefault) -> isDefault ? DEFAULT_DISPLAY

                        : sNextNonDefaultDisplayId++, flags), flags);

    }



    LogicalDisplayMapper(@NonNull Context context, FoldSettingProvider foldSettingProvider,

            FoldGracePeriodProvider foldGracePeriodProvider,

            @NonNull DisplayDeviceRepository repo,

            @NonNull Listener listener, @NonNull DisplayManagerService.SyncRoot syncRoot,

            @NonNull Handler handler, @NonNull DeviceStateToLayoutMap deviceStateToLayoutMap,
@@ -220,12 +225,14 @@ class LogicalDisplayMapper implements DisplayDeviceRepository.Listener { 
        mDisplayDeviceRepo = repo;

        mListener = listener;

        mFoldSettingProvider = foldSettingProvider;

        mFoldGracePeriodProvider = foldGracePeriodProvider;

        mSingleDisplayDemoMode = SystemProperties.getBoolean("persist.demo.singledisplay", false);

        mSupportsConcurrentInternalDisplays = context.getResources().getBoolean(

                com.android.internal.R.bool.config_supportsConcurrentInternalDisplays);

        mDeviceStatesOnWhichToWakeUp = toSparseBooleanArray(context.getResources().getIntArray(

                com.android.internal.R.array.config_deviceStatesOnWhichToWakeUp));

        mDeviceStatesOnWhichToSleep = toSparseBooleanArray(context.getResources().getIntArray(

        mDeviceStatesOnWhichToSelectiveSleep = toSparseBooleanArray(

                context.getResources().getIntArray(

                        com.android.internal.R.array.config_deviceStatesOnWhichToSleep));

        mDisplayDeviceRepo.addListener(this);

        mDeviceStateToLayoutMap = deviceStateToLayoutMap;
@@ -403,7 +410,7 @@ class LogicalDisplayMapper implements DisplayDeviceRepository.Listener { 
        ipw.println("mSingleDisplayDemoMode=" + mSingleDisplayDemoMode);

        ipw.println("mCurrentLayout=" + mCurrentLayout);

        ipw.println("mDeviceStatesOnWhichToWakeUp=" + mDeviceStatesOnWhichToWakeUp);

        ipw.println("mDeviceStatesOnWhichToSleep=" + mDeviceStatesOnWhichToSleep);

        ipw.println("mDeviceStatesOnWhichSelectiveSleep=" + mDeviceStatesOnWhichToSelectiveSleep);

        ipw.println("mInteractive=" + mInteractive);

        ipw.println("mBootCompleted=" + mBootCompleted);
@@ -569,8 +576,8 @@ class LogicalDisplayMapper implements DisplayDeviceRepository.Listener { 
    boolean shouldDeviceBePutToSleep(int pendingState, int currentState, boolean isOverrideActive,

            boolean isInteractive, boolean isBootCompleted) {

        return currentState != DeviceStateManager.INVALID_DEVICE_STATE

                && mDeviceStatesOnWhichToSleep.get(pendingState)

                && !mDeviceStatesOnWhichToSleep.get(currentState)

                && mDeviceStatesOnWhichToSelectiveSleep.get(pendingState)

                && !mDeviceStatesOnWhichToSelectiveSleep.get(currentState)

                && !isOverrideActive

                && isInteractive && isBootCompleted

                && !mFoldSettingProvider.shouldStayAwakeOnFold();
@@ -611,9 +618,12 @@ class LogicalDisplayMapper implements DisplayDeviceRepository.Listener { 
        final boolean waitingToWakeDevice = mDeviceStatesOnWhichToWakeUp.get(mPendingDeviceState)

                && !mDeviceStatesOnWhichToWakeUp.get(mDeviceState)

                && !mInteractive && mBootCompleted;

        final boolean waitingToSleepDevice = mDeviceStatesOnWhichToSleep.get(mPendingDeviceState)

                && !mDeviceStatesOnWhichToSleep.get(mDeviceState)

                && mInteractive && mBootCompleted;

        // The device should only wait for sleep if #shouldStayAwakeOnFold method returns false.

        // If not, device should be marked ready for transition immediately.

        final boolean waitingToSleepDevice = mDeviceStatesOnWhichToSelectiveSleep.get(

                mPendingDeviceState)

                && !mDeviceStatesOnWhichToSelectiveSleep.get(mDeviceState)

                && mInteractive && mBootCompleted && !shouldStayAwakeOnFold();



        final boolean displaysOff = areAllTransitioningDisplaysOffLocked();

        final boolean isReadyToTransition = displaysOff && !waitingToWakeDevice
@@ -1231,6 +1241,16 @@ class LogicalDisplayMapper implements DisplayDeviceRepository.Listener { 
        return retval;

    }



    /**

     * Returns true if the device would definitely have outer display ON/Stay Awake on fold based on

     * the value of `Continue using app on fold` setting

     */

    private boolean shouldStayAwakeOnFold() {

        return mFoldSettingProvider.shouldStayAwakeOnFold() || (

                mFoldSettingProvider.shouldSelectiveStayAwakeOnFold()

                        && mFoldGracePeriodProvider.isEnabled());

    }



    private String displayEventToString(int msg) {

        switch(msg) {

            case LOGICAL_DISPLAY_EVENT_ADDED:

services/tests/displayservicetests/src/com/android/server/display/LogicalDisplayMapperTest.java

+224 −1
Original line number Diff line number Diff line
@@ -20,6 +20,8 @@ import static android.hardware.devicestate.DeviceStateManager.INVALID_DEVICE_STA 
import static android.view.Display.DEFAULT_DISPLAY;

import static android.view.Display.DEFAULT_DISPLAY_GROUP;

import static android.view.Display.FLAG_REAR;

import static android.view.Display.STATE_OFF;

import static android.view.Display.STATE_ON;

import static android.view.Display.TYPE_EXTERNAL;

import static android.view.Display.TYPE_INTERNAL;

import static android.view.Display.TYPE_VIRTUAL;
@@ -28,6 +30,7 @@ import static com.android.server.display.DeviceStateToLayoutMap.STATE_DEFAULT; 
import static com.android.server.display.DisplayAdapter.DISPLAY_DEVICE_EVENT_ADDED;

import static com.android.server.display.DisplayAdapter.DISPLAY_DEVICE_EVENT_CHANGED;

import static com.android.server.display.DisplayAdapter.DISPLAY_DEVICE_EVENT_REMOVED;

import static com.android.server.display.DisplayDeviceInfo.DIFF_EVERYTHING;

import static com.android.server.display.DisplayDeviceInfo.FLAG_ALLOWED_TO_BE_DEFAULT_DISPLAY;

import static com.android.server.display.LogicalDisplayMapper.LOGICAL_DISPLAY_EVENT_ADDED;

import static com.android.server.display.LogicalDisplayMapper.LOGICAL_DISPLAY_EVENT_CONNECTED;
@@ -35,6 +38,9 @@ import static com.android.server.display.LogicalDisplayMapper.LOGICAL_DISPLAY_EV 
import static com.android.server.display.LogicalDisplayMapper.LOGICAL_DISPLAY_EVENT_REMOVED;

import static com.android.server.display.layout.Layout.Display.POSITION_REAR;

import static com.android.server.display.layout.Layout.Display.POSITION_UNKNOWN;

import static com.android.server.utils.FoldSettingProvider.SETTING_VALUE_SELECTIVE_STAY_AWAKE;

import static com.android.server.utils.FoldSettingProvider.SETTING_VALUE_SLEEP_ON_FOLD;

import static com.android.server.utils.FoldSettingProvider.SETTING_VALUE_STAY_AWAKE_ON_FOLD;



import static com.google.common.truth.Truth.assertThat;
@@ -72,6 +78,7 @@ import android.view.DisplayInfo; 
import androidx.test.ext.junit.runners.AndroidJUnit4;

import androidx.test.filters.SmallTest;



import com.android.internal.foldables.FoldGracePeriodProvider;

import com.android.server.display.feature.DisplayManagerFlags;

import com.android.server.display.layout.DisplayIdProducer;

import com.android.server.display.layout.Layout;
@@ -96,9 +103,13 @@ import java.util.List; 
@RunWith(AndroidJUnit4.class)

public class LogicalDisplayMapperTest {

    private static int sUniqueTestDisplayId = 0;

    private static final int TIMEOUT_STATE_TRANSITION_MILLIS = 500;

    private static final int FOLD_SETTLE_DELAY = 1000;

    private static final int DEVICE_STATE_CLOSED = 0;

    private static final int DEVICE_STATE_HALF_OPEN = 1;

    private static final int DEVICE_STATE_OPEN = 2;

    private static final int FLAG_GO_TO_SLEEP_ON_FOLD = 0;

    private static final int FLAG_GO_TO_SLEEP_FLAG_SOFT_SLEEP = 2;

    private static int sNextNonDefaultDisplayId = DEFAULT_DISPLAY + 1;

    private static final File NON_EXISTING_FILE = new File("/non_existing_folder/should_not_exist");
@@ -116,6 +127,7 @@ public class LogicalDisplayMapperTest { 
    @Mock LogicalDisplayMapper.Listener mListenerMock;

    @Mock Context mContextMock;

    @Mock FoldSettingProvider mFoldSettingProviderMock;

    @Mock FoldGracePeriodProvider mFoldGracePeriodProvider;

    @Mock Resources mResourcesMock;

    @Mock IPowerManager mIPowerManagerMock;

    @Mock IThermalService mIThermalServiceMock;
@@ -160,6 +172,7 @@ public class LogicalDisplayMapperTest { 
                .thenReturn(Context.POWER_SERVICE);

        when(mFoldSettingProviderMock.shouldStayAwakeOnFold()).thenReturn(false);

        when(mFoldSettingProviderMock.shouldSleepOnFold()).thenReturn(false);

        when(mFoldSettingProviderMock.shouldSelectiveStayAwakeOnFold()).thenReturn(true);

        when(mIPowerManagerMock.isInteractive()).thenReturn(true);

        when(mContextMock.getSystemService(PowerManager.class)).thenReturn(mPowerManager);

        when(mContextMock.getResources()).thenReturn(mResourcesMock);
@@ -177,6 +190,7 @@ public class LogicalDisplayMapperTest { 
        mLooper = new TestLooper();

        mHandler = new Handler(mLooper.getLooper());

        mLogicalDisplayMapper = new LogicalDisplayMapper(mContextMock, mFoldSettingProviderMock,

                mFoldGracePeriodProvider,

                mDisplayDeviceRepo,

                mListenerMock, new DisplayManagerService.SyncRoot(), mHandler,

                mDeviceStateToLayoutMapSpy, mFlagsMock);
@@ -694,21 +708,146 @@ public class LogicalDisplayMapperTest { 
        when(mFoldSettingProviderMock.shouldSleepOnFold()).thenReturn(true);



        finishBootAndFoldDevice();

        advanceTime(FOLD_SETTLE_DELAY);



        verify(mIPowerManagerMock, atLeastOnce()).goToSleep(anyLong(), anyInt(),

                eq(FLAG_GO_TO_SLEEP_ON_FOLD));

    }



    @Test

    public void testDeviceShouldPutToSleepWhenFoldSettingSelective() throws RemoteException {

        when(mFoldSettingProviderMock.shouldSelectiveStayAwakeOnFold()).thenReturn(true);



        finishBootAndFoldDevice();

        advanceTime(FOLD_SETTLE_DELAY);



        verify(mIPowerManagerMock, atLeastOnce()).goToSleep(anyLong(), anyInt(),

                eq(FLAG_GO_TO_SLEEP_FLAG_SOFT_SLEEP));

    }



    @Test

    public void testDeviceShouldNotBePutToSleepWhenSleepSettingFalse() throws RemoteException {

        when(mFoldSettingProviderMock.shouldSleepOnFold()).thenReturn(false);



        finishBootAndFoldDevice();

        advanceTime(FOLD_SETTLE_DELAY);



        verify(mIPowerManagerMock, never()).goToSleep(anyLong(), anyInt(),

                eq(FLAG_GO_TO_SLEEP_ON_FOLD));

    }



    @Test

    public void testWaitForSleepWhenFoldSettingSleep() {

        // Test device should not be marked ready for transition immediately, when 'Continue

        // using app on fold' set to 'Never'

        setFoldLockBehaviorSettingValue(SETTING_VALUE_SLEEP_ON_FOLD);

        setGracePeriodAvailability(false);

        FoldableDisplayDevices foldableDisplayDevices = createFoldableDeviceStateToLayoutMap();



        finishBootAndFoldDevice();

        foldableDisplayDevices.mInner.setState(STATE_OFF);

        notifyDisplayChanges(foldableDisplayDevices.mOuter);



        assertDisplayDisabled(foldableDisplayDevices.mOuter);

        assertDisplayEnabled(foldableDisplayDevices.mInner);

    }



    @Test

    public void testSwapDeviceStateWithDelayWhenFoldSettingSleep() {

        // Test device should be marked ready for transition after a delay when 'Continue using

        // app on fold' set to 'Never'

        setFoldLockBehaviorSettingValue(SETTING_VALUE_SLEEP_ON_FOLD);

        setGracePeriodAvailability(false);

        FoldableDisplayDevices foldableDisplayDevices = createFoldableDeviceStateToLayoutMap();



        finishBootAndFoldDevice();

        foldableDisplayDevices.mInner.setState(STATE_OFF);

        notifyDisplayChanges(foldableDisplayDevices.mOuter);

        advanceTime(TIMEOUT_STATE_TRANSITION_MILLIS);



        assertDisplayEnabled(foldableDisplayDevices.mOuter);

        assertDisplayDisabled(foldableDisplayDevices.mInner);

    }



    @Test

    public void testDoNotWaitForSleepWhenFoldSettingStayAwake() {

        // Test device should be marked ready for transition immediately when 'Continue using app

        // on fold' set to 'Always'

        setFoldLockBehaviorSettingValue(SETTING_VALUE_STAY_AWAKE_ON_FOLD);

        setGracePeriodAvailability(false);

        FoldableDisplayDevices foldableDisplayDevices = createFoldableDeviceStateToLayoutMap();



        finishBootAndFoldDevice();

        foldableDisplayDevices.mInner.setState(STATE_OFF);

        notifyDisplayChanges(foldableDisplayDevices.mOuter);



        assertDisplayEnabled(foldableDisplayDevices.mOuter);

        assertDisplayDisabled(foldableDisplayDevices.mInner);

    }



    @Test

    public void testDoNotWaitForSleepWhenFoldSettingSelectiveStayAwake() {

        // Test device should be marked ready for transition immediately when 'Continue using app

        // on fold' set to 'Swipe up to continue'

        setFoldLockBehaviorSettingValue(SETTING_VALUE_SELECTIVE_STAY_AWAKE);

        setGracePeriodAvailability(true);

        FoldableDisplayDevices foldableDisplayDevices = createFoldableDeviceStateToLayoutMap();



        finishBootAndFoldDevice();

        foldableDisplayDevices.mInner.setState(STATE_OFF);

        notifyDisplayChanges(foldableDisplayDevices.mOuter);



        assertDisplayEnabled(foldableDisplayDevices.mOuter);

        assertDisplayDisabled(foldableDisplayDevices.mInner);

    }



    @Test

    public void testWaitForSleepWhenGracePeriodSettingDisabled() {

        // Test device should not be marked ready for transition immediately when 'Continue using

        // app on fold' set to 'Swipe up to continue' but Grace Period flag is disabled

        setFoldLockBehaviorSettingValue(SETTING_VALUE_SELECTIVE_STAY_AWAKE);

        setGracePeriodAvailability(false);

        FoldableDisplayDevices foldableDisplayDevices = createFoldableDeviceStateToLayoutMap();



        finishBootAndFoldDevice();

        foldableDisplayDevices.mInner.setState(STATE_OFF);

        notifyDisplayChanges(foldableDisplayDevices.mOuter);



        assertDisplayDisabled(foldableDisplayDevices.mOuter);

        assertDisplayEnabled(foldableDisplayDevices.mInner);

    }



    @Test

    public void testWaitForSleepWhenTransitionDisplayStaysOn() {

        // Test device should not be marked ready for transition immediately, when 'Continue

        // using app on fold' set to 'Always' but not all transitioning displays are OFF.

        setFoldLockBehaviorSettingValue(SETTING_VALUE_STAY_AWAKE_ON_FOLD);

        setGracePeriodAvailability(false);

        FoldableDisplayDevices foldableDisplayDevices = createFoldableDeviceStateToLayoutMap();



        finishBootAndFoldDevice();

        notifyDisplayChanges(foldableDisplayDevices.mOuter);



        assertDisplayDisabled(foldableDisplayDevices.mOuter);

        assertDisplayEnabled(foldableDisplayDevices.mInner);

    }



    @Test

    public void testSwapDeviceStateWithDelayWhenTransitionDisplayStaysOn() {

        // Test device should be marked ready for transition after a delay, when 'Continue using

        // app on fold' set to 'Never' but not all transitioning displays are OFF.

        setFoldLockBehaviorSettingValue(SETTING_VALUE_SLEEP_ON_FOLD);

        setGracePeriodAvailability(false);

        FoldableDisplayDevices foldableDisplayDevices = createFoldableDeviceStateToLayoutMap();



        finishBootAndFoldDevice();

        notifyDisplayChanges(foldableDisplayDevices.mOuter);

        advanceTime(TIMEOUT_STATE_TRANSITION_MILLIS);



        assertDisplayEnabled(foldableDisplayDevices.mOuter);

        assertDisplayDisabled(foldableDisplayDevices.mInner);

    }



    @Test

    public void testDeviceStateLocked() {

        DisplayDevice device1 = createDisplayDevice(TYPE_INTERNAL, 600, 800,
@@ -963,13 +1102,77 @@ public class LogicalDisplayMapperTest { 
    // Helper Methods

    /////////////////



    private void setGracePeriodAvailability(boolean isGracePeriodEnabled) {

        when(mFoldGracePeriodProvider.isEnabled()).thenReturn(isGracePeriodEnabled);

    }



    private void setFoldLockBehaviorSettingValue(String foldLockBehaviorSettingValue) {

        when(mFoldSettingProviderMock.shouldSleepOnFold()).thenReturn(false);

        when(mFoldSettingProviderMock.shouldStayAwakeOnFold()).thenReturn(false);

        when(mFoldSettingProviderMock.shouldSelectiveStayAwakeOnFold()).thenReturn(false);



        switch (foldLockBehaviorSettingValue) {

            case SETTING_VALUE_STAY_AWAKE_ON_FOLD:

                when(mFoldSettingProviderMock.shouldStayAwakeOnFold()).thenReturn(true);

                break;



            case SETTING_VALUE_SLEEP_ON_FOLD:

                when(mFoldSettingProviderMock.shouldSleepOnFold()).thenReturn(true);

                break;



            default:

                when(mFoldSettingProviderMock.shouldSelectiveStayAwakeOnFold()).thenReturn(true);

                break;

        }

    }



    private FoldableDisplayDevices createFoldableDeviceStateToLayoutMap() {

        TestDisplayDevice outer = createDisplayDevice(TYPE_INTERNAL, 600, 800,

                FLAG_ALLOWED_TO_BE_DEFAULT_DISPLAY);

        TestDisplayDevice inner = createDisplayDevice(TYPE_INTERNAL, 600, 800,

                FLAG_ALLOWED_TO_BE_DEFAULT_DISPLAY);

        outer.setState(STATE_OFF);

        inner.setState(STATE_ON);



        Layout layout = new Layout();

        createDefaultDisplay(layout, outer);

        createNonDefaultDisplay(layout, inner, /* enabled= */ false, /* group= */ null);

        when(mDeviceStateToLayoutMapSpy.get(DEVICE_STATE_CLOSED)).thenReturn(layout);



        layout = new Layout();

        createNonDefaultDisplay(layout, outer, /* enabled= */ false, /* group= */ null);

        createDefaultDisplay(layout, inner);

        when(mDeviceStateToLayoutMapSpy.get(DEVICE_STATE_HALF_OPEN)).thenReturn(layout);

        when(mDeviceStateToLayoutMapSpy.get(DEVICE_STATE_OPEN)).thenReturn(layout);

        when(mDeviceStateToLayoutMapSpy.size()).thenReturn(4);



        add(outer);

        add(inner);



        return new FoldableDisplayDevices(outer, inner);

    }



    private void finishBootAndFoldDevice() {

        mLogicalDisplayMapper.setDeviceStateLocked(DEVICE_STATE_OPEN, false);

        mLogicalDisplayMapper.onEarlyInteractivityChange(true);

        advanceTime(1000);

        mLogicalDisplayMapper.onBootCompleted();

        advanceTime(1000);

        mLogicalDisplayMapper.setDeviceStateLocked(DEVICE_STATE_CLOSED, false);

        advanceTime(1000);

    }



    private void notifyDisplayChanges(TestDisplayDevice displayDevice) {

        mLogicalDisplayMapper.onDisplayDeviceChangedLocked(displayDevice, DIFF_EVERYTHING);

    }



    private void assertDisplayEnabled(DisplayDevice displayDevice) {

        assertThat(

                mLogicalDisplayMapper.getDisplayLocked(displayDevice).isEnabledLocked()).isTrue();

    }



    private void assertDisplayDisabled(DisplayDevice displayDevice) {

        assertThat(

                mLogicalDisplayMapper.getDisplayLocked(displayDevice).isEnabledLocked()).isFalse();

    }



    private void createDefaultDisplay(Layout layout, DisplayDevice device) {
@@ -1071,6 +1274,16 @@ public class LogicalDisplayMapperTest { 
        assertNotEquals(DEFAULT_DISPLAY, id(displayRemoved));

    }



    private final static class FoldableDisplayDevices {

        final TestDisplayDevice mOuter;

        final TestDisplayDevice mInner;



        FoldableDisplayDevices(TestDisplayDevice outer, TestDisplayDevice inner) {

            this.mOuter = outer;

            this.mInner = inner;

        }

    }



    class TestDisplayDevice extends DisplayDevice {

        private DisplayDeviceInfo mInfo;

        private DisplayDeviceInfo mSentInfo;
@@ -1096,6 +1309,16 @@ public class LogicalDisplayMapperTest { 
            mSentInfo = null;

        }



        public void setState(int state) {

            mState = state;

            if (mSentInfo == null) {

                mInfo.state = state;

            } else {

                mInfo.state = state;

                mSentInfo.state = state;

            }

        }



        @Override

        public boolean hasStableUniqueId() {

            return true;