tests/framework/base/windowmanager/src/android/server/wm/ConfigChangeTests.java - platform/cts - Git at Google

 /*
  * 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 android.server.wm;

 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.server.wm.StateLogger.log;
 import static android.server.wm.StateLogger.logE;
 import static android.server.wm.WindowManagerState.STATE_RESUMED;
 import static android.server.wm.app.Components.FONT_SCALE_ACTIVITY;
 import static android.server.wm.app.Components.FONT_SCALE_NO_RELAUNCH_ACTIVITY;
 import static android.server.wm.app.Components.FontScaleActivity.EXTRA_FONT_ACTIVITY_DPI;
 import static android.server.wm.app.Components.FontScaleActivity.EXTRA_FONT_PIXEL_SIZE;
 import static android.server.wm.app.Components.NO_RELAUNCH_ACTIVITY;
 import static android.server.wm.app.Components.TEST_ACTIVITY;
 import static android.server.wm.app.Components.TestActivity.EXTRA_CONFIG_ASSETS_SEQ;
 import static android.view.Surface.ROTATION_0;
 import static android.view.Surface.ROTATION_180;
 import static android.view.Surface.ROTATION_270;
 import static android.view.Surface.ROTATION_90;

 import static com.google.common.truth.Truth.assertWithMessage;

 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.junit.Assume.assumeFalse;
 import static org.junit.Assume.assumeTrue;

 import android.content.ComponentName;
 import android.os.Bundle;
 import android.platform.test.annotations.Presubmit;
 import android.server.wm.CommandSession.ActivityCallback;
 import android.server.wm.TestJournalProvider.TestJournalContainer;

 import com.android.compatibility.common.util.SystemUtil;

 import org.junit.Test;

 import java.util.Arrays;
 import java.util.List;

 /**
  * Build/Install/Run:
  *     atest CtsWindowManagerDeviceTestCases:ConfigChangeTests
  */
 @Presubmit
 public class ConfigChangeTests extends ActivityManagerTestBase {

     private static final float EXPECTED_FONT_SIZE_SP = 10.0f;

     @Test
     public void testRotation90Relaunch() {
         assumeTrue("Skipping test: no rotation support", supportsRotation());

         // Should relaunch on every rotation and receive no onConfigurationChanged()
         testRotation(TEST_ACTIVITY, 1, 1, 0);
     }

     @Test
     public void testRotation90NoRelaunch() {
         assumeTrue("Skipping test: no rotation support", supportsRotation());

         // Should receive onConfigurationChanged() on every rotation and no relaunch
         testRotation(NO_RELAUNCH_ACTIVITY, 1, 0, 1);
     }

     @Test
     public void testRotation180_RegularActivity() {
         assumeTrue("Skipping test: no rotation support", supportsRotation());
         assumeFalse("Skipping test: display cutout present, can't predict exact lifecycle",
                 hasDisplayCutout());

         // Should receive nothing
         testRotation(TEST_ACTIVITY, 2, 0, 0);
     }

     @Test
     public void testRotation180_NoRelaunchActivity() {
         assumeTrue("Skipping test: no rotation support", supportsRotation());
         assumeFalse("Skipping test: display cutout present, can't predict exact lifecycle",
                 hasDisplayCutout());

         // Should receive nothing
         testRotation(NO_RELAUNCH_ACTIVITY, 2, 0, 0);
     }

     /**
      * Test activity configuration changes for devices with cutout(s). Landscape and
      * reverse-landscape rotations should result in same screen space available for apps.
      */
     @Test
     public void testRotation180RelaunchWithCutout() {
         assumeTrue("Skipping test: no rotation support", supportsRotation());
         assumeTrue("Skipping test: no display cutout", hasDisplayCutout());

         testRotation180WithCutout(TEST_ACTIVITY, false /* canHandleConfigChange */);
     }

     @Test
     public void testRotation180NoRelaunchWithCutout() {
         assumeTrue("Skipping test: no rotation support", supportsRotation());
         assumeTrue("Skipping test: no display cutout", hasDisplayCutout());

         testRotation180WithCutout(NO_RELAUNCH_ACTIVITY, true /* canHandleConfigChange */);
     }

     private void testRotation180WithCutout(ComponentName activityName,
             boolean canHandleConfigChange) {
         launchActivity(activityName);
         mWmState.computeState(activityName);

         final RotationSession rotationSession = createManagedRotationSession();
         final ActivityLifecycleCounts count1 = getLifecycleCountsForRotation(activityName,
                 rotationSession, ROTATION_0 /* before */, ROTATION_180 /* after */,
                 canHandleConfigChange);
         final int configChangeCount1 = count1.getCount(ActivityCallback.ON_CONFIGURATION_CHANGED);
         final int relaunchCount1 = count1.getCount(ActivityCallback.ON_CREATE);

         final ActivityLifecycleCounts count2 = getLifecycleCountsForRotation(activityName,
                 rotationSession, ROTATION_90 /* before */, ROTATION_270 /* after */,
                 canHandleConfigChange);
         final int configChangeCount2 = count2.getCount(ActivityCallback.ON_CONFIGURATION_CHANGED);
         final int relaunchCount2 = count2.getCount(ActivityCallback.ON_CREATE);

         final int configChange = configChangeCount1 + configChangeCount2;
         final int relaunch = relaunchCount1 + relaunchCount2;
         if (canHandleConfigChange) {
             assertWithMessage("There must be at most one 180 degree rotation that results in the"
                     + " same configuration.").that(configChange).isLessThan(2);
             assertEquals("There must be no relaunch during test", 0, relaunch);
             return;
         }

         // If the size change does not cross the threshold, the activity will receive
         // onConfigurationChanged instead of relaunching.
         assertWithMessage("There must be at most one 180 degree rotation that results in relaunch"
                 + " or a configuration change.").that(relaunch + configChange).isLessThan(2);

         final boolean resize1 = configChangeCount1 + relaunchCount1 > 0;
         final boolean resize2 = configChangeCount2 + relaunchCount2 > 0;
         // There should at least one 180 rotation without resize.
         final boolean sameSize = !resize1 || !resize2;

         assertTrue("A device with cutout should have the same available screen space"
                 + " in landscape and reverse-landscape", sameSize);
     }

     private void prepareRotation(ComponentName activityName, RotationSession session,
             int currentRotation, int initialRotation, boolean canHandleConfigChange) {
         final boolean is90DegreeDelta = Math.abs(currentRotation - initialRotation) % 2 != 0;
         if (is90DegreeDelta) {
             separateTestJournal();
         }
         session.set(initialRotation);
         if (is90DegreeDelta) {
             // Consume the changes of "before" rotation to make sure the activity is in a stable
             // state to apply "after" rotation.
             final ActivityCallback expectedCallback = canHandleConfigChange
                     ? ActivityCallback.ON_CONFIGURATION_CHANGED
                     : ActivityCallback.ON_CREATE;
             Condition.waitFor(new ActivityLifecycleCounts(activityName)
                     .countWithRetry("activity rotated with 90 degree delta",
                             countSpec(expectedCallback, CountSpec.GREATER_THAN, 0)));
         }
     }

     private ActivityLifecycleCounts getLifecycleCountsForRotation(ComponentName activityName,
             RotationSession session, int before, int after, boolean canHandleConfigChange)  {
         final int currentRotation = mWmState.getRotation();
         // The test verifies the events from "before" rotation to "after" rotation. So when
         // preparing "before" rotation, the changes should be consumed to avoid being mixed into
         // the result to verify.
         prepareRotation(activityName, session, currentRotation, before, canHandleConfigChange);
         separateTestJournal();
         session.set(after);
         mWmState.computeState(activityName);
         return new ActivityLifecycleCounts(activityName);
     }

     @Test
     public void testChangeFontScaleRelaunch() {
         // Should relaunch and receive no onConfigurationChanged()
         testChangeFontScale(FONT_SCALE_ACTIVITY, true /* relaunch */);
     }

     @Test
     public void testChangeFontScaleNoRelaunch() {
         // Should receive onConfigurationChanged() and no relaunch
         testChangeFontScale(FONT_SCALE_NO_RELAUNCH_ACTIVITY, false /* relaunch */);
     }

     private void testRotation(ComponentName activityName, int rotationStep, int numRelaunch,
             int numConfigChange) {
         launchActivity(activityName, WINDOWING_MODE_FULLSCREEN);
         mWmState.computeState(activityName);

         final int initialRotation = 4 - rotationStep;
         final RotationSession rotationSession = createManagedRotationSession();
         prepareRotation(activityName, rotationSession, mWmState.getRotation(), initialRotation,
                 numConfigChange > 0);
         final int actualStackId =
                 mWmState.getTaskByActivity(activityName).mRootTaskId;
         final int displayId = mWmState.getRootTask(actualStackId).mDisplayId;
         final int newDeviceRotation = getDeviceRotation(displayId);
         if (newDeviceRotation == INVALID_DEVICE_ROTATION) {
             logE("Got an invalid device rotation value. "
                     + "Continuing the test despite of that, but it is likely to fail.");
         } else if (newDeviceRotation != initialRotation) {
             log("This device doesn't support user rotation "
                     + "mode. Not continuing the rotation checks.");
             return;
         }

         for (int rotation = 0; rotation < 4; rotation += rotationStep) {
             separateTestJournal();
             rotationSession.set(rotation);
             mWmState.computeState(activityName);
             assertRelaunchOrConfigChanged(activityName, numRelaunch, numConfigChange);
         }
     }

     private void testChangeFontScale(ComponentName activityName, boolean relaunch) {
         final FontScaleSession fontScaleSession = createManagedFontScaleSession();
         fontScaleSession.set(1.0f);
         separateTestJournal();
         launchActivity(activityName);
         mWmState.computeState(activityName);

         final Bundle extras = TestJournalContainer.get(activityName).extras;
         if (!extras.containsKey(EXTRA_FONT_ACTIVITY_DPI)) {
             fail("No fontActivityDpi reported from activity " + activityName);
         }
         final int densityDpi = extras.getInt(EXTRA_FONT_ACTIVITY_DPI);

         for (float fontScale = 0.85f; fontScale <= 1.3f; fontScale += 0.15f) {
             separateTestJournal();
             fontScaleSession.set(fontScale);
             mWmState.computeState(activityName);
             assertRelaunchOrConfigChanged(activityName, relaunch ? 1 : 0, relaunch ? 0 : 1);

             // Verify that the display metrics are updated, and therefore the text size is also
             // updated accordingly.
             final Bundle changedExtras = TestJournalContainer.get(activityName).extras;
             waitForOrFail("reported fontPixelSize from " + activityName,
                     () -> changedExtras.containsKey(EXTRA_FONT_PIXEL_SIZE));
             final int expectedFontPixelSize =
                     scaledPixelsToPixels(EXPECTED_FONT_SIZE_SP, fontScale, densityDpi);
             assertEquals("Expected font pixel size should match", expectedFontPixelSize,
                     changedExtras.getInt(EXTRA_FONT_PIXEL_SIZE));
         }
     }

     /**
      * Test updating application info when app is running. An activity with matching package name
      * must be recreated and its asset sequence number must be incremented.
      */
     @Test
     public void testUpdateApplicationInfo() throws Exception {
         separateTestJournal();

         // Launch an activity that prints applied config.
         launchActivity(TEST_ACTIVITY);
         final int assetSeq = getAssetSeqNumber(TEST_ACTIVITY);

         separateTestJournal();
         // Update package info.
         updateApplicationInfo(Arrays.asList(TEST_ACTIVITY.getPackageName()));
         mWmState.waitForWithAmState((amState) -> {
             // Wait for activity to be resumed and asset seq number to be updated.
             try {
                 return getAssetSeqNumber(TEST_ACTIVITY) == assetSeq + 1
                         && amState.hasActivityState(TEST_ACTIVITY, STATE_RESUMED);
             } catch (Exception e) {
                 logE("Error waiting for valid state: " + e.getMessage());
                 return false;
             }
         }, "asset sequence number to be updated and for activity to be resumed.");

         // Check if activity is relaunched and asset seq is updated.
         assertRelaunchOrConfigChanged(TEST_ACTIVITY, 1 /* numRelaunch */,
                 0 /* numConfigChange */);
         final int newAssetSeq = getAssetSeqNumber(TEST_ACTIVITY);
         assertTrue("Asset sequence number must be incremented.", assetSeq < newAssetSeq);
     }

     private static int getAssetSeqNumber(ComponentName activityName) {
         return TestJournalContainer.get(activityName).extras.getInt(EXTRA_CONFIG_ASSETS_SEQ);
     }

     // Calculate the scaled pixel size just like the device is supposed to.
     private static int scaledPixelsToPixels(float sp, float fontScale, int densityDpi) {
         final int DEFAULT_DENSITY = 160;
         float f = densityDpi * (1.0f / DEFAULT_DENSITY) * fontScale * sp;
         return (int) ((f >= 0) ? (f + 0.5f) : (f - 0.5f));
     }

     private void updateApplicationInfo(List<String> packages) {
         SystemUtil.runWithShellPermissionIdentity(
                 () -> mAm.scheduleApplicationInfoChanged(packages,
                         android.os.Process.myUserHandle().getIdentifier())
         );
     }
 }
	/*
	* 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 android.server.wm;

	import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
	import static android.server.wm.StateLogger.log;
	import static android.server.wm.StateLogger.logE;
	import static android.server.wm.WindowManagerState.STATE_RESUMED;
	import static android.server.wm.app.Components.FONT_SCALE_ACTIVITY;
	import static android.server.wm.app.Components.FONT_SCALE_NO_RELAUNCH_ACTIVITY;
	import static android.server.wm.app.Components.FontScaleActivity.EXTRA_FONT_ACTIVITY_DPI;
	import static android.server.wm.app.Components.FontScaleActivity.EXTRA_FONT_PIXEL_SIZE;
	import static android.server.wm.app.Components.NO_RELAUNCH_ACTIVITY;
	import static android.server.wm.app.Components.TEST_ACTIVITY;
	import static android.server.wm.app.Components.TestActivity.EXTRA_CONFIG_ASSETS_SEQ;
	import static android.view.Surface.ROTATION_0;
	import static android.view.Surface.ROTATION_180;
	import static android.view.Surface.ROTATION_270;
	import static android.view.Surface.ROTATION_90;

	import static com.google.common.truth.Truth.assertWithMessage;

	import static org.junit.Assert.assertEquals;
	import static org.junit.Assert.assertTrue;
	import static org.junit.Assert.fail;
	import static org.junit.Assume.assumeFalse;
	import static org.junit.Assume.assumeTrue;

	import android.content.ComponentName;
	import android.os.Bundle;
	import android.platform.test.annotations.Presubmit;
	import android.server.wm.CommandSession.ActivityCallback;
	import android.server.wm.TestJournalProvider.TestJournalContainer;

	import com.android.compatibility.common.util.SystemUtil;

	import org.junit.Test;

	import java.util.Arrays;
	import java.util.List;

	/**
	* Build/Install/Run:
	* atest CtsWindowManagerDeviceTestCases:ConfigChangeTests
	*/
	@Presubmit
	public class ConfigChangeTests extends ActivityManagerTestBase {

	private static final float EXPECTED_FONT_SIZE_SP = 10.0f;

	@Test
	public void testRotation90Relaunch() {
	assumeTrue("Skipping test: no rotation support", supportsRotation());

	// Should relaunch on every rotation and receive no onConfigurationChanged()
	testRotation(TEST_ACTIVITY, 1, 1, 0);
	}

	@Test
	public void testRotation90NoRelaunch() {
	assumeTrue("Skipping test: no rotation support", supportsRotation());

	// Should receive onConfigurationChanged() on every rotation and no relaunch
	testRotation(NO_RELAUNCH_ACTIVITY, 1, 0, 1);
	}

	@Test
	public void testRotation180_RegularActivity() {
	assumeTrue("Skipping test: no rotation support", supportsRotation());
	assumeFalse("Skipping test: display cutout present, can't predict exact lifecycle",
	hasDisplayCutout());

	// Should receive nothing
	testRotation(TEST_ACTIVITY, 2, 0, 0);
	}

	@Test
	public void testRotation180_NoRelaunchActivity() {
	assumeTrue("Skipping test: no rotation support", supportsRotation());
	assumeFalse("Skipping test: display cutout present, can't predict exact lifecycle",
	hasDisplayCutout());

	// Should receive nothing
	testRotation(NO_RELAUNCH_ACTIVITY, 2, 0, 0);
	}

	/**
	* Test activity configuration changes for devices with cutout(s). Landscape and
	* reverse-landscape rotations should result in same screen space available for apps.
	*/
	@Test
	public void testRotation180RelaunchWithCutout() {
	assumeTrue("Skipping test: no rotation support", supportsRotation());
	assumeTrue("Skipping test: no display cutout", hasDisplayCutout());

	testRotation180WithCutout(TEST_ACTIVITY, false /* canHandleConfigChange */);
	}

	@Test
	public void testRotation180NoRelaunchWithCutout() {
	assumeTrue("Skipping test: no rotation support", supportsRotation());
	assumeTrue("Skipping test: no display cutout", hasDisplayCutout());

	testRotation180WithCutout(NO_RELAUNCH_ACTIVITY, true /* canHandleConfigChange */);
	}

	private void testRotation180WithCutout(ComponentName activityName,
	boolean canHandleConfigChange) {
	launchActivity(activityName);
	mWmState.computeState(activityName);

	final RotationSession rotationSession = createManagedRotationSession();
	final ActivityLifecycleCounts count1 = getLifecycleCountsForRotation(activityName,
	rotationSession, ROTATION_0 /* before /, ROTATION_180 / after */,
	canHandleConfigChange);
	final int configChangeCount1 = count1.getCount(ActivityCallback.ON_CONFIGURATION_CHANGED);
	final int relaunchCount1 = count1.getCount(ActivityCallback.ON_CREATE);

	final ActivityLifecycleCounts count2 = getLifecycleCountsForRotation(activityName,
	rotationSession, ROTATION_90 /* before /, ROTATION_270 / after */,
	canHandleConfigChange);
	final int configChangeCount2 = count2.getCount(ActivityCallback.ON_CONFIGURATION_CHANGED);
	final int relaunchCount2 = count2.getCount(ActivityCallback.ON_CREATE);

	final int configChange = configChangeCount1 + configChangeCount2;
	final int relaunch = relaunchCount1 + relaunchCount2;
	if (canHandleConfigChange) {
	assertWithMessage("There must be at most one 180 degree rotation that results in the"
	+ " same configuration.").that(configChange).isLessThan(2);
	assertEquals("There must be no relaunch during test", 0, relaunch);
	return;
	}

	// If the size change does not cross the threshold, the activity will receive
	// onConfigurationChanged instead of relaunching.
	assertWithMessage("There must be at most one 180 degree rotation that results in relaunch"
	+ " or a configuration change.").that(relaunch + configChange).isLessThan(2);

	final boolean resize1 = configChangeCount1 + relaunchCount1 > 0;
	final boolean resize2 = configChangeCount2 + relaunchCount2 > 0;
	// There should at least one 180 rotation without resize.
	final boolean sameSize = !resize1 \|\| !resize2;

	assertTrue("A device with cutout should have the same available screen space"
	+ " in landscape and reverse-landscape", sameSize);
	}

	private void prepareRotation(ComponentName activityName, RotationSession session,
	int currentRotation, int initialRotation, boolean canHandleConfigChange) {
	final boolean is90DegreeDelta = Math.abs(currentRotation - initialRotation) % 2 != 0;
	if (is90DegreeDelta) {
	separateTestJournal();
	}
	session.set(initialRotation);
	if (is90DegreeDelta) {
	// Consume the changes of "before" rotation to make sure the activity is in a stable
	// state to apply "after" rotation.
	final ActivityCallback expectedCallback = canHandleConfigChange
	? ActivityCallback.ON_CONFIGURATION_CHANGED
	: ActivityCallback.ON_CREATE;
	Condition.waitFor(new ActivityLifecycleCounts(activityName)
	.countWithRetry("activity rotated with 90 degree delta",
	countSpec(expectedCallback, CountSpec.GREATER_THAN, 0)));
	}
	}

	private ActivityLifecycleCounts getLifecycleCountsForRotation(ComponentName activityName,
	RotationSession session, int before, int after, boolean canHandleConfigChange) {
	final int currentRotation = mWmState.getRotation();
	// The test verifies the events from "before" rotation to "after" rotation. So when
	// preparing "before" rotation, the changes should be consumed to avoid being mixed into
	// the result to verify.
	prepareRotation(activityName, session, currentRotation, before, canHandleConfigChange);
	separateTestJournal();
	session.set(after);
	mWmState.computeState(activityName);
	return new ActivityLifecycleCounts(activityName);
	}

	@Test
	public void testChangeFontScaleRelaunch() {
	// Should relaunch and receive no onConfigurationChanged()
	testChangeFontScale(FONT_SCALE_ACTIVITY, true /* relaunch */);
	}

	@Test
	public void testChangeFontScaleNoRelaunch() {
	// Should receive onConfigurationChanged() and no relaunch
	testChangeFontScale(FONT_SCALE_NO_RELAUNCH_ACTIVITY, false /* relaunch */);
	}

	private void testRotation(ComponentName activityName, int rotationStep, int numRelaunch,
	int numConfigChange) {
	launchActivity(activityName, WINDOWING_MODE_FULLSCREEN);
	mWmState.computeState(activityName);

	final int initialRotation = 4 - rotationStep;
	final RotationSession rotationSession = createManagedRotationSession();
	prepareRotation(activityName, rotationSession, mWmState.getRotation(), initialRotation,
	numConfigChange > 0);
	final int actualStackId =
	mWmState.getTaskByActivity(activityName).mRootTaskId;
	final int displayId = mWmState.getRootTask(actualStackId).mDisplayId;
	final int newDeviceRotation = getDeviceRotation(displayId);
	if (newDeviceRotation == INVALID_DEVICE_ROTATION) {
	logE("Got an invalid device rotation value. "
	+ "Continuing the test despite of that, but it is likely to fail.");
	} else if (newDeviceRotation != initialRotation) {
	log("This device doesn't support user rotation "
	+ "mode. Not continuing the rotation checks.");
	return;
	}

	for (int rotation = 0; rotation < 4; rotation += rotationStep) {
	separateTestJournal();
	rotationSession.set(rotation);
	mWmState.computeState(activityName);
	assertRelaunchOrConfigChanged(activityName, numRelaunch, numConfigChange);
	}
	}

	private void testChangeFontScale(ComponentName activityName, boolean relaunch) {
	final FontScaleSession fontScaleSession = createManagedFontScaleSession();
	fontScaleSession.set(1.0f);
	separateTestJournal();
	launchActivity(activityName);
	mWmState.computeState(activityName);

	final Bundle extras = TestJournalContainer.get(activityName).extras;
	if (!extras.containsKey(EXTRA_FONT_ACTIVITY_DPI)) {
	fail("No fontActivityDpi reported from activity " + activityName);
	}
	final int densityDpi = extras.getInt(EXTRA_FONT_ACTIVITY_DPI);

	for (float fontScale = 0.85f; fontScale <= 1.3f; fontScale += 0.15f) {
	separateTestJournal();
	fontScaleSession.set(fontScale);
	mWmState.computeState(activityName);
	assertRelaunchOrConfigChanged(activityName, relaunch ? 1 : 0, relaunch ? 0 : 1);

	// Verify that the display metrics are updated, and therefore the text size is also
	// updated accordingly.
	final Bundle changedExtras = TestJournalContainer.get(activityName).extras;
	waitForOrFail("reported fontPixelSize from " + activityName,
	() -> changedExtras.containsKey(EXTRA_FONT_PIXEL_SIZE));
	final int expectedFontPixelSize =
	scaledPixelsToPixels(EXPECTED_FONT_SIZE_SP, fontScale, densityDpi);
	assertEquals("Expected font pixel size should match", expectedFontPixelSize,
	changedExtras.getInt(EXTRA_FONT_PIXEL_SIZE));
	}
	}

	/**
	* Test updating application info when app is running. An activity with matching package name
	* must be recreated and its asset sequence number must be incremented.
	*/
	@Test
	public void testUpdateApplicationInfo() throws Exception {
	separateTestJournal();

	// Launch an activity that prints applied config.
	launchActivity(TEST_ACTIVITY);
	final int assetSeq = getAssetSeqNumber(TEST_ACTIVITY);

	separateTestJournal();
	// Update package info.
	updateApplicationInfo(Arrays.asList(TEST_ACTIVITY.getPackageName()));
	mWmState.waitForWithAmState((amState) -> {
	// Wait for activity to be resumed and asset seq number to be updated.
	try {
	return getAssetSeqNumber(TEST_ACTIVITY) == assetSeq + 1
	&& amState.hasActivityState(TEST_ACTIVITY, STATE_RESUMED);
	} catch (Exception e) {
	logE("Error waiting for valid state: " + e.getMessage());
	return false;
	}
	}, "asset sequence number to be updated and for activity to be resumed.");

	// Check if activity is relaunched and asset seq is updated.
	assertRelaunchOrConfigChanged(TEST_ACTIVITY, 1 /* numRelaunch */,
	0 /* numConfigChange */);
	final int newAssetSeq = getAssetSeqNumber(TEST_ACTIVITY);
	assertTrue("Asset sequence number must be incremented.", assetSeq < newAssetSeq);
	}

	private static int getAssetSeqNumber(ComponentName activityName) {
	return TestJournalContainer.get(activityName).extras.getInt(EXTRA_CONFIG_ASSETS_SEQ);
	}

	// Calculate the scaled pixel size just like the device is supposed to.
	private static int scaledPixelsToPixels(float sp, float fontScale, int densityDpi) {
	final int DEFAULT_DENSITY = 160;
	float f = densityDpi * (1.0f / DEFAULT_DENSITY) * fontScale * sp;
	return (int) ((f >= 0) ? (f + 0.5f) : (f - 0.5f));
	}

	private void updateApplicationInfo(List<String> packages) {
	SystemUtil.runWithShellPermissionIdentity(
	() -> mAm.scheduleApplicationInfoChanged(packages,
	android.os.Process.myUserHandle().getIdentifier())
	);
	}
	}