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Commit 39a26e84 authored by Ady Abraham's avatar Ady Abraham Committed by Automerger Merge Worker
Browse files

Merge changes I0f37f856,I55dc5c2a into sc-dev am: 5dea7907 

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15193078

Change-Id: I43f9d3327da450a7da196702035d1ef4bbafcf2b
parents 256cf17a 5dea7907

services/core/java/com/android/server/wm/RefreshRatePolicy.java

+15 −22
Original line number Diff line number Diff line
@@ -89,20 +89,15 @@ class RefreshRatePolicy { 
    }



    int getPreferredModeId(WindowState w) {



        // If app is animating, it's not able to control refresh rate because we want the animation

        // to run in default refresh rate.

        if (w.isAnimating(TRANSITION | PARENTS)) {

            return 0;

        }



        if (w.mAttrs.preferredRefreshRate != 0 || w.mAttrs.preferredDisplayModeId != 0) {

        return w.mAttrs.preferredDisplayModeId;

    }



        return 0;

    }



    /**

     * Calculate the priority based on whether the window is in focus and whether the application

     * voted for a specific refresh rate.
@@ -134,12 +129,9 @@ class RefreshRatePolicy { 
            return 0;

        }



        final String packageName = w.getOwningPackage();

        if (mHighRefreshRateDenylist.isDenylisted(packageName)) {

            return mLowRefreshRateMode.getRefreshRate();

        }



        final int preferredModeId = getPreferredModeId(w);

        // If the app set a preferredDisplayModeId, the preferred refresh rate is the refresh rate

        // of that mode id.

        final int preferredModeId = w.mAttrs.preferredDisplayModeId;

        if (preferredModeId > 0) {

            DisplayInfo info = w.getDisplayInfo();

            if (info != null) {
@@ -151,6 +143,17 @@ class RefreshRatePolicy { 
            }

        }



        if (w.mAttrs.preferredRefreshRate > 0) {

            return w.mAttrs.preferredRefreshRate;

        }



        // If the app didn't set a preferred mode id or refresh rate, but it is part of the deny

        // list, we return the low refresh rate as the preferred one.

        final String packageName = w.getOwningPackage();

        if (mHighRefreshRateDenylist.isDenylisted(packageName)) {

            return mLowRefreshRateMode.getRefreshRate();

        }



        return 0;

    }
@@ -161,11 +164,6 @@ class RefreshRatePolicy { 
            return 0;

        }



        // If app requests a certain refresh rate or mode, don't override it.

        if (w.mAttrs.preferredDisplayModeId != 0) {

            return 0;

        }



        return w.mAttrs.preferredMinDisplayRefreshRate;

    }
@@ -176,11 +174,6 @@ class RefreshRatePolicy { 
            return 0;

        }



        // If app requests a certain refresh rate or mode, don't override it.

        if (w.mAttrs.preferredDisplayModeId != 0) {

            return 0;

        }



        if (w.mAttrs.preferredMaxDisplayRefreshRate > 0) {

            return w.mAttrs.preferredMaxDisplayRefreshRate;

        }

services/tests/wmtests/src/com/android/server/wm/FrameRateSelectionPriorityTests.java

+29 −1
Original line number Diff line number Diff line
@@ -228,7 +228,7 @@ public class FrameRateSelectionPriorityTests extends WindowTestsBase { 
    }



    @Test

    public void testPreferredRefreshRate() {

    public void testDenyListPreferredRefreshRate() {

        final WindowState appWindow = createWindow("appWindow");

        assertNotNull("Window state is created", appWindow);

        when(appWindow.getDisplayContent().getDisplayPolicy()).thenReturn(mDisplayPolicy);
@@ -281,4 +281,32 @@ public class FrameRateSelectionPriorityTests extends WindowTestsBase { 
        verify(appWindow.getPendingTransaction(), never()).setFrameRate(

                any(SurfaceControl.class), anyInt(), anyInt(), anyInt());

    }



    @Test

    public void testAppPreferredRefreshRate() {

        final WindowState appWindow = createWindow("appWindow");

        assertNotNull("Window state is created", appWindow);

        when(appWindow.getDisplayContent().getDisplayPolicy()).thenReturn(mDisplayPolicy);



        appWindow.mAttrs.packageName = "com.android.test";

        appWindow.mAttrs.preferredRefreshRate = 60;



        assertEquals(0, mRefreshRatePolicy.getPreferredModeId(appWindow));

        assertEquals(60, mRefreshRatePolicy.getPreferredRefreshRate(appWindow), FLOAT_TOLERANCE);



        appWindow.updateFrameRateSelectionPriorityIfNeeded();

        assertEquals(RefreshRatePolicy.LAYER_PRIORITY_UNSET, appWindow.mFrameRateSelectionPriority);

        assertEquals(60, appWindow.mAppPreferredFrameRate, FLOAT_TOLERANCE);



        // Call the function a few times.

        appWindow.updateFrameRateSelectionPriorityIfNeeded();

        appWindow.updateFrameRateSelectionPriorityIfNeeded();



        // Since nothing changed in the priority state, the transaction should not be updating.

        verify(appWindow.getPendingTransaction(), never()).setFrameRateSelectionPriority(

                any(SurfaceControl.class), anyInt());

        verify(appWindow.getPendingTransaction(), times(1)).setFrameRate(

                appWindow.getSurfaceControl(), 60,

                Surface.FRAME_RATE_COMPATIBILITY_EXACT, Surface.CHANGE_FRAME_RATE_ALWAYS);

    }

}

services/tests/wmtests/src/com/android/server/wm/RefreshRatePolicyTest.java

+141 −42
Original line number Diff line number Diff line
@@ -27,7 +27,6 @@ import static org.mockito.Mockito.when; 
import android.os.Parcel;

import android.platform.test.annotations.Presubmit;

import android.view.Display.Mode;

import android.view.DisplayInfo;

import android.view.WindowManager.LayoutParams;



import androidx.test.filters.FlakyTest;
@@ -47,7 +46,14 @@ import org.junit.runner.RunWith; 
@FlakyTest

public class RefreshRatePolicyTest extends WindowTestsBase {

    private static final float FLOAT_TOLERANCE = 0.01f;

    private static final int HI_MODE_ID = 1;

    private static final float HI_REFRESH_RATE = 90;



    private static final int MID_MODE_ID = 2;

    private static final float MID_REFRESH_RATE = 70;



    private static final int LOW_MODE_ID = 3;

    private static final float LOW_REFRESH_RATE = 60;



    private RefreshRatePolicy mPolicy;

    private HighRefreshRateDenylist mDenylist = mock(HighRefreshRateDenylist.class);
@@ -64,22 +70,31 @@ public class RefreshRatePolicyTest extends WindowTestsBase { 


    @Before

    public void setUp() {

        DisplayInfo di = new DisplayInfo(mDisplayInfo);

        Mode defaultMode = di.getDefaultMode();

        di.supportedModes = new Mode[] {

                new Mode(1, defaultMode.getPhysicalWidth(), defaultMode.getPhysicalHeight(), 90),

                new Mode(2, defaultMode.getPhysicalWidth(), defaultMode.getPhysicalHeight(), 70),

        Mode defaultMode = mDisplayInfo.getDefaultMode();

        mDisplayInfo.supportedModes = new Mode[] {

                new Mode(HI_MODE_ID,

                        defaultMode.getPhysicalWidth(), defaultMode.getPhysicalHeight(),

                        HI_REFRESH_RATE),

                new Mode(MID_MODE_ID,

                        defaultMode.getPhysicalWidth(), defaultMode.getPhysicalHeight(),

                        MID_REFRESH_RATE),

                new Mode(LOW_MODE_ID,

                        defaultMode.getPhysicalWidth(), defaultMode.getPhysicalHeight(), 60),

                        defaultMode.getPhysicalWidth(), defaultMode.getPhysicalHeight(),

                        LOW_REFRESH_RATE),

        };

        di.defaultModeId = 1;

        mPolicy = new RefreshRatePolicy(mWm, di, mDenylist);

        mDisplayInfo.defaultModeId = HI_MODE_ID;

        mPolicy = new RefreshRatePolicy(mWm, mDisplayInfo, mDenylist);

    }



    WindowState createWindow(String name) {

        WindowState window = createWindow(null, TYPE_BASE_APPLICATION, name);

        when(window.getDisplayInfo()).thenReturn(mDisplayInfo);

        return window;

    }



    @Test

    public void testCamera() {

        final WindowState cameraUsingWindow = createWindow(null, TYPE_BASE_APPLICATION,

                "cameraUsingWindow");

        final WindowState cameraUsingWindow = createWindow("cameraUsingWindow");

        cameraUsingWindow.mAttrs.packageName = "com.android.test";

        parcelLayoutParams(cameraUsingWindow);

        assertEquals(0, mPolicy.getPreferredModeId(cameraUsingWindow));
@@ -90,70 +105,152 @@ public class RefreshRatePolicyTest extends WindowTestsBase { 
        assertEquals(0, mPolicy.getPreferredModeId(cameraUsingWindow));

        assertEquals(0, mPolicy.getPreferredRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);

        assertEquals(60, mPolicy.getPreferredMaxRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);

        assertEquals(LOW_REFRESH_RATE,

                mPolicy.getPreferredMaxRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);

        mPolicy.removeNonHighRefreshRatePackage("com.android.test");

        assertEquals(0, mPolicy.getPreferredModeId(cameraUsingWindow));

        assertEquals(0, mPolicy.getPreferredRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);

    }



    @Test

    public void testDenyList() {

        final WindowState denylistedWindow = createWindow(null, TYPE_BASE_APPLICATION,

                "denylistedWindow");

        final WindowState denylistedWindow = createWindow("denylistedWindow");

        denylistedWindow.mAttrs.packageName = "com.android.test";

        parcelLayoutParams(denylistedWindow);

        when(mDenylist.isDenylisted("com.android.test")).thenReturn(true);

        assertEquals(0, mPolicy.getPreferredModeId(denylistedWindow));

        assertEquals(60, mPolicy.getPreferredRefreshRate(denylistedWindow), FLOAT_TOLERANCE);

        assertEquals(LOW_REFRESH_RATE,

                mPolicy.getPreferredRefreshRate(denylistedWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(denylistedWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(denylistedWindow), FLOAT_TOLERANCE);

    }



    @Test

    public void testAppOverride_blacklist() {

        final WindowState overrideWindow = createWindow(null, TYPE_BASE_APPLICATION,

                "overrideWindow");

    public void testAppOverridePreferredModeId_denylist() {

        final WindowState overrideWindow = createWindow("overrideWindow");

        overrideWindow.mAttrs.packageName = "com.android.test";

        overrideWindow.mAttrs.preferredDisplayModeId = LOW_MODE_ID;

        overrideWindow.mAttrs.preferredDisplayModeId = HI_MODE_ID;

        parcelLayoutParams(overrideWindow);

        when(mDenylist.isDenylisted("com.android.test")).thenReturn(true);

        assertEquals(LOW_MODE_ID, mPolicy.getPreferredModeId(overrideWindow));

        assertEquals(60, mPolicy.getPreferredRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(HI_MODE_ID, mPolicy.getPreferredModeId(overrideWindow));

        assertEquals(HI_REFRESH_RATE,

                mPolicy.getPreferredRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(overrideWindow), FLOAT_TOLERANCE);

    }



    @Test

    public void testAppOverride_camera() {

        final WindowState overrideWindow = createWindow(null, TYPE_BASE_APPLICATION,

                "overrideWindow");

    public void testAppOverridePreferredRefreshRate_denylist() {

        final WindowState overrideWindow = createWindow("overrideWindow");

        overrideWindow.mAttrs.packageName = "com.android.test";

        overrideWindow.mAttrs.preferredDisplayModeId = LOW_MODE_ID;

        overrideWindow.mAttrs.preferredRefreshRate = HI_REFRESH_RATE;

        parcelLayoutParams(overrideWindow);

        when(mDenylist.isDenylisted("com.android.test")).thenReturn(true);

        assertEquals(0, mPolicy.getPreferredModeId(overrideWindow));

        assertEquals(HI_REFRESH_RATE,

                mPolicy.getPreferredRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(overrideWindow), FLOAT_TOLERANCE);

    }



    @Test

    public void testAppOverridePreferredModeId_camera() {

        final WindowState overrideWindow = createWindow("overrideWindow");

        overrideWindow.mAttrs.packageName = "com.android.test";

        overrideWindow.mAttrs.preferredDisplayModeId = HI_MODE_ID;

        parcelLayoutParams(overrideWindow);

        mPolicy.addNonHighRefreshRatePackage("com.android.test");

        assertEquals(HI_MODE_ID, mPolicy.getPreferredModeId(overrideWindow));

        assertEquals(HI_REFRESH_RATE,

                mPolicy.getPreferredRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(LOW_REFRESH_RATE,

                mPolicy.getPreferredMaxRefreshRate(overrideWindow), FLOAT_TOLERANCE);

    }



    @Test

    public void testAppOverridePreferredRefreshRate_camera() {

        final WindowState overrideWindow = createWindow("overrideWindow");

        overrideWindow.mAttrs.packageName = "com.android.test";

        overrideWindow.mAttrs.preferredRefreshRate = HI_REFRESH_RATE;

        parcelLayoutParams(overrideWindow);

        mPolicy.addNonHighRefreshRatePackage("com.android.test");

        assertEquals(0, mPolicy.getPreferredModeId(overrideWindow));

        assertEquals(HI_REFRESH_RATE,

                mPolicy.getPreferredRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(LOW_REFRESH_RATE,

                mPolicy.getPreferredMaxRefreshRate(overrideWindow), FLOAT_TOLERANCE);

    }



    @Test

    public void testAnimatingAppOverridePreferredModeId() {

        final WindowState overrideWindow = createWindow("overrideWindow");

        overrideWindow.mAttrs.packageName = "com.android.test";

        overrideWindow.mAttrs.preferredDisplayModeId = LOW_MODE_ID;

        parcelLayoutParams(overrideWindow);

        assertEquals(LOW_MODE_ID, mPolicy.getPreferredModeId(overrideWindow));

        assertEquals(LOW_REFRESH_RATE,

                mPolicy.getPreferredRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(overrideWindow), FLOAT_TOLERANCE);



        overrideWindow.mActivityRecord.mSurfaceAnimator.startAnimation(

                overrideWindow.getPendingTransaction(), mock(AnimationAdapter.class),

                false /* hidden */, ANIMATION_TYPE_APP_TRANSITION);

        assertEquals(0, mPolicy.getPreferredModeId(overrideWindow));

        assertEquals(0, mPolicy.getPreferredRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(overrideWindow), FLOAT_TOLERANCE);

    }



    @Test

    public void testAnimatingAppOverride() {

        final WindowState overrideWindow = createWindow(null, TYPE_BASE_APPLICATION,

                "overrideWindow");

    public void testAnimatingAppOverridePreferredRefreshRate() {

        final WindowState overrideWindow = createWindow("overrideWindow");

        overrideWindow.mAttrs.packageName = "com.android.test";

        overrideWindow.mAttrs.preferredDisplayModeId = LOW_MODE_ID;

        overrideWindow.mAttrs.preferredRefreshRate = LOW_REFRESH_RATE;

        parcelLayoutParams(overrideWindow);

        assertEquals(0, mPolicy.getPreferredModeId(overrideWindow));

        assertEquals(LOW_REFRESH_RATE,

                mPolicy.getPreferredRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(overrideWindow), FLOAT_TOLERANCE);



        overrideWindow.mActivityRecord.mSurfaceAnimator.startAnimation(

                overrideWindow.getPendingTransaction(), mock(AnimationAdapter.class),

                false /* hidden */, ANIMATION_TYPE_APP_TRANSITION);

        mPolicy.addNonHighRefreshRatePackage("com.android.test");

        assertEquals(0, mPolicy.getPreferredModeId(overrideWindow));

        assertEquals(0, mPolicy.getPreferredRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(overrideWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(overrideWindow), FLOAT_TOLERANCE);

    }



    @Test

    public void testAnimatingDenylist() {

        final WindowState window = createWindow("overrideWindow");

        window.mAttrs.packageName = "com.android.test";

        parcelLayoutParams(window);

        when(mDenylist.isDenylisted("com.android.test")).thenReturn(true);

        assertEquals(0, mPolicy.getPreferredModeId(window));

        assertEquals(LOW_REFRESH_RATE,

                mPolicy.getPreferredRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(window), FLOAT_TOLERANCE);



        window.mActivityRecord.mSurfaceAnimator.startAnimation(

                window.getPendingTransaction(), mock(AnimationAdapter.class),

                false /* hidden */, ANIMATION_TYPE_APP_TRANSITION);

        assertEquals(0, mPolicy.getPreferredModeId(window));

        assertEquals(0, mPolicy.getPreferredRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(window), FLOAT_TOLERANCE);

    }



    @Test

    public void testAnimatingCamera() {

        final WindowState cameraUsingWindow = createWindow(null, TYPE_BASE_APPLICATION,

                "cameraUsingWindow");

        final WindowState cameraUsingWindow = createWindow("cameraUsingWindow");

        cameraUsingWindow.mAttrs.packageName = "com.android.test";

        parcelLayoutParams(cameraUsingWindow);
@@ -161,7 +258,8 @@ public class RefreshRatePolicyTest extends WindowTestsBase { 
        assertEquals(0, mPolicy.getPreferredModeId(cameraUsingWindow));

        assertEquals(0, mPolicy.getPreferredRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);

        assertEquals(60, mPolicy.getPreferredMaxRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);

        assertEquals(LOW_REFRESH_RATE,

                mPolicy.getPreferredMaxRefreshRate(cameraUsingWindow), FLOAT_TOLERANCE);



        cameraUsingWindow.mActivityRecord.mSurfaceAnimator.startAnimation(

                cameraUsingWindow.getPendingTransaction(), mock(AnimationAdapter.class),
@@ -174,13 +272,13 @@ public class RefreshRatePolicyTest extends WindowTestsBase { 


    @Test

    public void testAppMaxRefreshRate() {

        final WindowState window = createWindow(null, TYPE_BASE_APPLICATION, "window");

        window.mAttrs.preferredMaxDisplayRefreshRate = 60f;

        final WindowState window = createWindow("window");

        window.mAttrs.preferredMaxDisplayRefreshRate = LOW_REFRESH_RATE;

        parcelLayoutParams(window);

        assertEquals(0, mPolicy.getPreferredModeId(window));

        assertEquals(0, mPolicy.getPreferredRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(60, mPolicy.getPreferredMaxRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(LOW_REFRESH_RATE, mPolicy.getPreferredMaxRefreshRate(window), FLOAT_TOLERANCE);



        window.mActivityRecord.mSurfaceAnimator.startAnimation(

                window.getPendingTransaction(), mock(AnimationAdapter.class),
@@ -193,12 +291,12 @@ public class RefreshRatePolicyTest extends WindowTestsBase { 


    @Test

    public void testAppMinRefreshRate() {

        final WindowState window = createWindow(null, TYPE_BASE_APPLICATION, "window");

        window.mAttrs.preferredMinDisplayRefreshRate = 60f;

        final WindowState window = createWindow("window");

        window.mAttrs.preferredMinDisplayRefreshRate = LOW_REFRESH_RATE;

        parcelLayoutParams(window);

        assertEquals(0, mPolicy.getPreferredModeId(window));

        assertEquals(0, mPolicy.getPreferredRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(60, mPolicy.getPreferredMinRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(LOW_REFRESH_RATE, mPolicy.getPreferredMinRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(window), FLOAT_TOLERANCE);



        window.mActivityRecord.mSurfaceAnimator.startAnimation(
@@ -206,16 +304,17 @@ public class RefreshRatePolicyTest extends WindowTestsBase { 
                false /* hidden */, ANIMATION_TYPE_APP_TRANSITION);

        assertEquals(0, mPolicy.getPreferredModeId(window));

        assertEquals(0, mPolicy.getPreferredRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(window), FLOAT_TOLERANCE);

    }



    @Test

    public void testAppPreferredRefreshRate() {

        final WindowState window = createWindow(null, TYPE_BASE_APPLICATION, "window");

        window.mAttrs.preferredRefreshRate = 60f;

        final WindowState window = createWindow("window");

        window.mAttrs.preferredRefreshRate = LOW_REFRESH_RATE;

        parcelLayoutParams(window);

        assertEquals(0, mPolicy.getPreferredModeId(window));

        assertEquals(60, mPolicy.getPreferredRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(LOW_REFRESH_RATE, mPolicy.getPreferredRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMinRefreshRate(window), FLOAT_TOLERANCE);

        assertEquals(0, mPolicy.getPreferredMaxRefreshRate(window), FLOAT_TOLERANCE);

    }