Merge "Implement class to evaluate current use of Notification object memory" into tm-qpr-dev

2022-10-06 17:20:35 +00:00
parent a1db600e04 b2cf87c8c9
commit f30597709c
5 changed files with 616 additions and 0 deletions
--- a/packages/SystemUI/src/com/android/systemui/flags/Flags.java
+++ b/packages/SystemUI/src/com/android/systemui/flags/Flags.java
@@ -68,6 +68,9 @@ public class Flags {

    public static final UnreleasedFlag INSTANT_VOICE_REPLY = new UnreleasedFlag(111, true);

+    public static final UnreleasedFlag NOTIFICATION_MEMORY_MONITOR_ENABLED = new UnreleasedFlag(112,
+            false);
+
    // next id: 112

    /***************************************/
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/init/NotificationsControllerImpl.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/init/NotificationsControllerImpl.kt
@@ -19,6 +19,8 @@ package com.android.systemui.statusbar.notification.init
 import android.service.notification.StatusBarNotification
 import com.android.systemui.ForegroundServiceNotificationListener
 import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.flags.FeatureFlags
+import com.android.systemui.flags.Flags
 import com.android.systemui.people.widget.PeopleSpaceWidgetManager
 import com.android.systemui.plugins.statusbar.NotificationSwipeActionHelper.SnoozeOption
 import com.android.systemui.statusbar.NotificationListener
@@ -36,6 +38,7 @@ import com.android.systemui.statusbar.notification.collection.notifcollection.Co
 import com.android.systemui.statusbar.notification.collection.notifcollection.NotifCollectionListener
 import com.android.systemui.statusbar.notification.collection.render.NotifStackController
 import com.android.systemui.statusbar.notification.interruption.HeadsUpViewBinder
+import com.android.systemui.statusbar.notification.logging.NotificationMemoryMonitor
 import com.android.systemui.statusbar.notification.row.NotifBindPipelineInitializer
 import com.android.systemui.statusbar.notification.stack.NotificationListContainer
 import com.android.systemui.statusbar.phone.CentralSurfaces
@@ -68,6 +71,8 @@ class NotificationsControllerImpl @Inject constructor(
    private val peopleSpaceWidgetManager: PeopleSpaceWidgetManager,
    private val bubblesOptional: Optional<Bubbles>,
    private val fgsNotifListener: ForegroundServiceNotificationListener,
+    private val memoryMonitor: Lazy<NotificationMemoryMonitor>,
+    private val featureFlags: FeatureFlags
 ) : NotificationsController {

    override fun initialize(
@@ -107,6 +112,9 @@ class NotificationsControllerImpl @Inject constructor(

        peopleSpaceWidgetManager.attach(notificationListener)
        fgsNotifListener.init()
+        if (featureFlags.isEnabled(Flags.NOTIFICATION_MEMORY_MONITOR_ENABLED)) {
+            memoryMonitor.get().init()
+        }
    }

    // TODO: Convert all functions below this line into listeners instead of public methods
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/logging/NotificationMemory.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/logging/NotificationMemory.kt
@@ -0,0 +1,41 @@
+/*
+ *
+ * Copyright (C) 2022 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.systemui.statusbar.notification.logging
+
+/** Describes usage of a notification. */
+data class NotificationMemoryUsage(
+    val packageName: String,
+    val notificationId: String,
+    val objectUsage: NotificationObjectUsage,
+)
+
+/**
+ * Describes current memory usage of a [android.app.Notification] object.
+ *
+ * The values are in bytes.
+ */
+data class NotificationObjectUsage(
+    val smallIcon: Int,
+    val largeIcon: Int,
+    val extras: Int,
+    val style: String?,
+    val styleIcon: Int,
+    val bigPicture: Int,
+    val extender: Int,
+    val hasCustomView: Boolean,
+)
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/logging/NotificationMemoryMonitor.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/logging/NotificationMemoryMonitor.kt
@@ -0,0 +1,243 @@
+/*
+ *
+ * Copyright (C) 2022 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.systemui.statusbar.notification.logging
+
+import android.app.Notification
+import android.app.Person
+import android.graphics.Bitmap
+import android.graphics.drawable.Icon
+import android.os.Bundle
+import android.os.Parcel
+import android.os.Parcelable
+import android.util.Log
+import androidx.annotation.WorkerThread
+import androidx.core.util.contains
+import com.android.systemui.Dumpable
+import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.dump.DumpManager
+import com.android.systemui.statusbar.notification.NotificationUtils
+import com.android.systemui.statusbar.notification.collection.NotifPipeline
+import com.android.systemui.statusbar.notification.collection.NotificationEntry
+import java.io.PrintWriter
+import javax.inject.Inject
+
+/** This class monitors and logs current Notification memory use. */
+@SysUISingleton
+class NotificationMemoryMonitor
+@Inject
+constructor(
+    val notificationPipeline: NotifPipeline,
+    val dumpManager: DumpManager,
+) : Dumpable {
+
+    companion object {
+        private const val TAG = "NotificationMemMonitor"
+        private const val CAR_EXTENSIONS = "android.car.EXTENSIONS"
+        private const val CAR_EXTENSIONS_LARGE_ICON = "large_icon"
+        private const val TV_EXTENSIONS = "android.tv.EXTENSIONS"
+        private const val WEARABLE_EXTENSIONS = "android.wearable.EXTENSIONS"
+        private const val WEARABLE_EXTENSIONS_BACKGROUND = "background"
+    }
+
+    fun init() {
+        Log.d(TAG, "NotificationMemoryMonitor initialized.")
+        dumpManager.registerDumpable(javaClass.simpleName, this)
+    }
+
+    override fun dump(pw: PrintWriter, args: Array<out String>) {
+        currentNotificationMemoryUse().forEach { use -> pw.println(use.toString()) }
+    }
+
+    @WorkerThread
+    fun currentNotificationMemoryUse(): List<NotificationMemoryUsage> {
+        return notificationMemoryUse(notificationPipeline.allNotifs)
+    }
+
+    /** Returns a list of memory use entries for currently shown notifications. */
+    @WorkerThread
+    fun notificationMemoryUse(
+        notifications: Collection<NotificationEntry>
+    ): List<NotificationMemoryUsage> {
+        return notifications
+            .asSequence()
+            .map { entry ->
+                val packageName = entry.sbn.packageName
+                val notificationObjectUsage =
+                    computeNotificationObjectUse(entry.sbn.notification, hashSetOf())
+                NotificationMemoryUsage(
+                    packageName,
+                    NotificationUtils.logKey(entry.sbn.key),
+                    notificationObjectUsage
+                )
+            }
+            .toList()
+    }
+
+    /**
+     * Computes the estimated memory usage of a given [Notification] object. It'll attempt to
+     * inspect Bitmaps in the object and provide summary of memory usage.
+     */
+    private fun computeNotificationObjectUse(
+        notification: Notification,
+        seenBitmaps: HashSet<Int>
+    ): NotificationObjectUsage {
+        val extras = notification.extras
+        val smallIconUse = computeIconUse(notification.smallIcon, seenBitmaps)
+        val largeIconUse = computeIconUse(notification.getLargeIcon(), seenBitmaps)
+
+        // Collect memory usage of extra styles
+
+        // Big Picture
+        val bigPictureIconUse =
+            computeParcelableUse(extras, Notification.EXTRA_PICTURE_ICON, seenBitmaps) +
+                computeParcelableUse(extras, Notification.EXTRA_LARGE_ICON_BIG, seenBitmaps)
+        val bigPictureUse =
+            computeParcelableUse(extras, Notification.EXTRA_PICTURE, seenBitmaps) +
+                computeParcelableUse(extras, Notification.EXTRA_PICTURE_ICON, seenBitmaps)
+
+        // People
+        val peopleList = extras.getParcelableArrayList<Person>(Notification.EXTRA_PEOPLE_LIST)
+        val peopleUse =
+            peopleList?.sumOf { person -> computeIconUse(person.icon, seenBitmaps) } ?: 0
+
+        // Calling
+        val callingPersonUse =
+            computeParcelableUse(extras, Notification.EXTRA_CALL_PERSON, seenBitmaps)
+        val verificationIconUse =
+            computeParcelableUse(extras, Notification.EXTRA_VERIFICATION_ICON, seenBitmaps)
+
+        // Messages
+        val messages =
+            Notification.MessagingStyle.Message.getMessagesFromBundleArray(
+                extras.getParcelableArray(Notification.EXTRA_MESSAGES)
+            )
+        val messagesUse =
+            messages.sumOf { msg -> computeIconUse(msg.senderPerson?.icon, seenBitmaps) }
+        val historicMessages =
+            Notification.MessagingStyle.Message.getMessagesFromBundleArray(
+                extras.getParcelableArray(Notification.EXTRA_HISTORIC_MESSAGES)
+            )
+        val historyicMessagesUse =
+            historicMessages.sumOf { msg -> computeIconUse(msg.senderPerson?.icon, seenBitmaps) }
+
+        // Extenders
+        val carExtender = extras.getBundle(CAR_EXTENSIONS)
+        val carExtenderSize = carExtender?.let { computeBundleSize(it) } ?: 0
+        val carExtenderIcon =
+            computeParcelableUse(carExtender, CAR_EXTENSIONS_LARGE_ICON, seenBitmaps)
+
+        val tvExtender = extras.getBundle(TV_EXTENSIONS)
+        val tvExtenderSize = tvExtender?.let { computeBundleSize(it) } ?: 0
+
+        val wearExtender = extras.getBundle(WEARABLE_EXTENSIONS)
+        val wearExtenderSize = wearExtender?.let { computeBundleSize(it) } ?: 0
+        val wearExtenderBackground =
+            computeParcelableUse(wearExtender, WEARABLE_EXTENSIONS_BACKGROUND, seenBitmaps)
+
+        val style = notification.notificationStyle
+        val hasCustomView = notification.contentView != null || notification.bigContentView != null
+        val extrasSize = computeBundleSize(extras)
+
+        return NotificationObjectUsage(
+            smallIconUse,
+            largeIconUse,
+            extrasSize,
+            style?.simpleName,
+            bigPictureIconUse +
+                peopleUse +
+                callingPersonUse +
+                verificationIconUse +
+                messagesUse +
+                historyicMessagesUse,
+            bigPictureUse,
+            carExtenderSize +
+                carExtenderIcon +
+                tvExtenderSize +
+                wearExtenderSize +
+                wearExtenderBackground,
+            hasCustomView
+        )
+    }
+
+    /**
+     * Calculates size of the bundle data (excluding FDs and other shared objects like ashmem
+     * bitmaps). Can be slow.
+     */
+    private fun computeBundleSize(extras: Bundle): Int {
+        val parcel = Parcel.obtain()
+        try {
+            extras.writeToParcel(parcel, 0)
+            return parcel.dataSize()
+        } finally {
+            parcel.recycle()
+        }
+    }
+
+    /**
+     * Deserializes [Icon], [Bitmap] or [Person] from extras and computes its memory use. Returns 0
+     * if the key does not exist in extras.
+     */
+    private fun computeParcelableUse(extras: Bundle?, key: String, seenBitmaps: HashSet<Int>): Int {
+        return when (val parcelable = extras?.getParcelable<Parcelable>(key)) {
+            is Bitmap -> computeBitmapUse(parcelable, seenBitmaps)
+            is Icon -> computeIconUse(parcelable, seenBitmaps)
+            is Person -> computeIconUse(parcelable.icon, seenBitmaps)
+            else -> 0
+        }
+    }
+
+    /**
+     * Calculates the byte size of bitmaps or data in the Icon object. Returns 0 if the icon is
+     * defined via Uri or a resource.
+     *
+     * @return memory usage in bytes or 0 if the icon is Uri/Resource based
+     */
+    private fun computeIconUse(icon: Icon?, seenBitmaps: HashSet<Int>) =
+        when (icon?.type) {
+            Icon.TYPE_BITMAP -> computeBitmapUse(icon.bitmap, seenBitmaps)
+            Icon.TYPE_ADAPTIVE_BITMAP -> computeBitmapUse(icon.bitmap, seenBitmaps)
+            Icon.TYPE_DATA -> computeDataUse(icon, seenBitmaps)
+            else -> 0
+        }
+
+    /**
+     * Returns the amount of memory a given bitmap is using. If the bitmap reference is part of
+     * seenBitmaps set, this method returns 0 to avoid double counting.
+     *
+     * @return memory usage of the bitmap in bytes
+     */
+    private fun computeBitmapUse(bitmap: Bitmap, seenBitmaps: HashSet<Int>? = null): Int {
+        val refId = System.identityHashCode(bitmap)
+        if (seenBitmaps?.contains(refId) == true) {
+            return 0
+        }
+
+        seenBitmaps?.add(refId)
+        return bitmap.allocationByteCount
+    }
+
+    private fun computeDataUse(icon: Icon, seenBitmaps: HashSet<Int>): Int {
+        val refId = System.identityHashCode(icon.dataBytes)
+        if (seenBitmaps.contains(refId)) {
+            return 0
+        }
+
+        seenBitmaps.add(refId)
+        return icon.dataLength
+    }
+}
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/logging/NotificationMemoryMonitorTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/logging/NotificationMemoryMonitorTest.kt
@@ -0,0 +1,321 @@
+/*
+ *
+ * Copyright (C) 2022 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.systemui.statusbar.notification.logging
+
+import android.app.Notification
+import android.app.PendingIntent
+import android.app.Person
+import android.content.Intent
+import android.graphics.Bitmap
+import android.graphics.drawable.Icon
+import android.testing.AndroidTestingRunner
+import android.widget.RemoteViews
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.statusbar.notification.NotificationUtils
+import com.android.systemui.statusbar.notification.collection.NotifPipeline
+import com.android.systemui.statusbar.notification.collection.NotificationEntryBuilder
+import com.android.systemui.util.mockito.mock
+import com.android.systemui.util.mockito.whenever
+import com.google.common.truth.Truth.assertThat
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.MockitoAnnotations
+
+@SmallTest
+@RunWith(AndroidTestingRunner::class)
+class NotificationMemoryMonitorTest : SysuiTestCase() {
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+    }
+
+    @Test
+    fun currentNotificationMemoryUse_plainNotification() {
+        val notification = createBasicNotification().build()
+        val nmm = createNMMWithNotifications(listOf(notification))
+        val memoryUse = getUseObject(nmm.currentNotificationMemoryUse())
+        assertNotificationObjectSizes(
+            memoryUse,
+            smallIcon = notification.smallIcon.bitmap.allocationByteCount,
+            largeIcon = notification.getLargeIcon().bitmap.allocationByteCount,
+            extras = 3316,
+            bigPicture = 0,
+            extender = 0,
+            style = null,
+            styleIcon = 0,
+            hasCustomView = false,
+        )
+    }
+
+    @Test
+    fun currentNotificationMemoryUse_plainNotification_dontDoubleCountSameBitmap() {
+        val icon = Icon.createWithBitmap(Bitmap.createBitmap(100, 100, Bitmap.Config.ARGB_8888))
+        val notification = createBasicNotification().setLargeIcon(icon).setSmallIcon(icon).build()
+        val nmm = createNMMWithNotifications(listOf(notification))
+        val memoryUse = getUseObject(nmm.currentNotificationMemoryUse())
+        assertNotificationObjectSizes(
+            memoryUse = memoryUse,
+            smallIcon = notification.smallIcon.bitmap.allocationByteCount,
+            largeIcon = 0,
+            extras = 3316,
+            bigPicture = 0,
+            extender = 0,
+            style = null,
+            styleIcon = 0,
+            hasCustomView = false,
+        )
+    }
+
+    @Test
+    fun currentNotificationMemoryUse_customViewNotification_marksTrue() {
+        val notification =
+            createBasicNotification()
+                .setCustomContentView(
+                    RemoteViews(context.packageName, android.R.layout.list_content)
+                )
+                .build()
+        val nmm = createNMMWithNotifications(listOf(notification))
+        val memoryUse = getUseObject(nmm.currentNotificationMemoryUse())
+        assertNotificationObjectSizes(
+            memoryUse = memoryUse,
+            smallIcon = notification.smallIcon.bitmap.allocationByteCount,
+            largeIcon = notification.getLargeIcon().bitmap.allocationByteCount,
+            extras = 3384,
+            bigPicture = 0,
+            extender = 0,
+            style = null,
+            styleIcon = 0,
+            hasCustomView = true,
+        )
+    }
+
+    @Test
+    fun currentNotificationMemoryUse_notificationWithDataIcon_calculatesCorrectly() {
+        val dataIcon = Icon.createWithData(ByteArray(444444), 0, 444444)
+        val notification =
+            createBasicNotification().setLargeIcon(dataIcon).setSmallIcon(dataIcon).build()
+        val nmm = createNMMWithNotifications(listOf(notification))
+        val memoryUse = getUseObject(nmm.currentNotificationMemoryUse())
+        assertNotificationObjectSizes(
+            memoryUse = memoryUse,
+            smallIcon = 444444,
+            largeIcon = 0,
+            extras = 3212,
+            bigPicture = 0,
+            extender = 0,
+            style = null,
+            styleIcon = 0,
+            hasCustomView = false,
+        )
+    }
+
+    @Test
+    fun currentNotificationMemoryUse_bigPictureStyle() {
+        val bigPicture =
+            Icon.createWithBitmap(Bitmap.createBitmap(600, 400, Bitmap.Config.ARGB_8888))
+        val bigPictureIcon =
+            Icon.createWithAdaptiveBitmap(Bitmap.createBitmap(386, 432, Bitmap.Config.ARGB_8888))
+        val notification =
+            createBasicNotification()
+                .setStyle(
+                    Notification.BigPictureStyle()
+                        .bigPicture(bigPicture)
+                        .bigLargeIcon(bigPictureIcon)
+                )
+                .build()
+        val nmm = createNMMWithNotifications(listOf(notification))
+        val memoryUse = getUseObject(nmm.currentNotificationMemoryUse())
+        assertNotificationObjectSizes(
+            memoryUse = memoryUse,
+            smallIcon = notification.smallIcon.bitmap.allocationByteCount,
+            largeIcon = notification.getLargeIcon().bitmap.allocationByteCount,
+            extras = 4092,
+            bigPicture = bigPicture.bitmap.allocationByteCount,
+            extender = 0,
+            style = "BigPictureStyle",
+            styleIcon = bigPictureIcon.bitmap.allocationByteCount,
+            hasCustomView = false,
+        )
+    }
+
+    @Test
+    fun currentNotificationMemoryUse_callingStyle() {
+        val personIcon =
+            Icon.createWithBitmap(Bitmap.createBitmap(386, 432, Bitmap.Config.ARGB_8888))
+        val person = Person.Builder().setIcon(personIcon).setName("Person").build()
+        val fakeIntent =
+            PendingIntent.getActivity(context, 0, Intent(), PendingIntent.FLAG_IMMUTABLE)
+        val notification =
+            createBasicNotification()
+                .setStyle(Notification.CallStyle.forIncomingCall(person, fakeIntent, fakeIntent))
+                .build()
+        val nmm = createNMMWithNotifications(listOf(notification))
+        val memoryUse = getUseObject(nmm.currentNotificationMemoryUse())
+        assertNotificationObjectSizes(
+            memoryUse = memoryUse,
+            smallIcon = notification.smallIcon.bitmap.allocationByteCount,
+            largeIcon = notification.getLargeIcon().bitmap.allocationByteCount,
+            extras = 4084,
+            bigPicture = 0,
+            extender = 0,
+            style = "CallStyle",
+            styleIcon = personIcon.bitmap.allocationByteCount,
+            hasCustomView = false,
+        )
+    }
+
+    @Test
+    fun currentNotificationMemoryUse_messagingStyle() {
+        val personIcon =
+            Icon.createWithBitmap(Bitmap.createBitmap(386, 432, Bitmap.Config.ARGB_8888))
+        val person = Person.Builder().setIcon(personIcon).setName("Person").build()
+        val message = Notification.MessagingStyle.Message("Message!", 4323, person)
+        val historicPersonIcon =
+            Icon.createWithBitmap(Bitmap.createBitmap(348, 382, Bitmap.Config.ARGB_8888))
+        val historicPerson =
+            Person.Builder().setIcon(historicPersonIcon).setName("Historic person").build()
+        val historicMessage =
+            Notification.MessagingStyle.Message("Historic message!", 5848, historicPerson)
+
+        val notification =
+            createBasicNotification()
+                .setStyle(
+                    Notification.MessagingStyle(person)
+                        .addMessage(message)
+                        .addHistoricMessage(historicMessage)
+                )
+                .build()
+        val nmm = createNMMWithNotifications(listOf(notification))
+        val memoryUse = getUseObject(nmm.currentNotificationMemoryUse())
+        assertNotificationObjectSizes(
+            memoryUse = memoryUse,
+            smallIcon = notification.smallIcon.bitmap.allocationByteCount,
+            largeIcon = notification.getLargeIcon().bitmap.allocationByteCount,
+            extras = 5024,
+            bigPicture = 0,
+            extender = 0,
+            style = "MessagingStyle",
+            styleIcon =
+                personIcon.bitmap.allocationByteCount +
+                    historicPersonIcon.bitmap.allocationByteCount,
+            hasCustomView = false,
+        )
+    }
+
+    @Test
+    fun currentNotificationMemoryUse_carExtender() {
+        val carIcon = Bitmap.createBitmap(432, 322, Bitmap.Config.ARGB_8888)
+        val extender = Notification.CarExtender().setLargeIcon(carIcon)
+        val notification = createBasicNotification().extend(extender).build()
+        val nmm = createNMMWithNotifications(listOf(notification))
+        val memoryUse = getUseObject(nmm.currentNotificationMemoryUse())
+        assertNotificationObjectSizes(
+            memoryUse = memoryUse,
+            smallIcon = notification.smallIcon.bitmap.allocationByteCount,
+            largeIcon = notification.getLargeIcon().bitmap.allocationByteCount,
+            extras = 3612,
+            bigPicture = 0,
+            extender = 556656,
+            style = null,
+            styleIcon = 0,
+            hasCustomView = false,
+        )
+    }
+
+    @Test
+    fun currentNotificationMemoryUse_tvWearExtender() {
+        val tvExtender = Notification.TvExtender().setChannel("channel2")
+        val wearBackground = Bitmap.createBitmap(443, 433, Bitmap.Config.ARGB_8888)
+        val wearExtender = Notification.WearableExtender().setBackground(wearBackground)
+        val notification = createBasicNotification().extend(tvExtender).extend(wearExtender).build()
+        val nmm = createNMMWithNotifications(listOf(notification))
+        val memoryUse = getUseObject(nmm.currentNotificationMemoryUse())
+        assertNotificationObjectSizes(
+            memoryUse = memoryUse,
+            smallIcon = notification.smallIcon.bitmap.allocationByteCount,
+            largeIcon = notification.getLargeIcon().bitmap.allocationByteCount,
+            extras = 3820,
+            bigPicture = 0,
+            extender = 388 + wearBackground.allocationByteCount,
+            style = null,
+            styleIcon = 0,
+            hasCustomView = false,
+        )
+    }
+
+    private fun createBasicNotification(): Notification.Builder {
+        val smallIcon =
+            Icon.createWithBitmap(Bitmap.createBitmap(250, 250, Bitmap.Config.ARGB_8888))
+        val largeIcon =
+            Icon.createWithBitmap(Bitmap.createBitmap(400, 400, Bitmap.Config.ARGB_8888))
+        return Notification.Builder(context)
+            .setSmallIcon(smallIcon)
+            .setLargeIcon(largeIcon)
+            .setContentTitle("This is a title")
+            .setContentText("This is content text.")
+    }
+
+    /** This will generate a nicer error message than comparing objects */
+    private fun assertNotificationObjectSizes(
+        memoryUse: NotificationMemoryUsage,
+        smallIcon: Int,
+        largeIcon: Int,
+        extras: Int,
+        bigPicture: Int,
+        extender: Int,
+        style: String?,
+        styleIcon: Int,
+        hasCustomView: Boolean
+    ) {
+        assertThat(memoryUse.packageName).isEqualTo("test_pkg")
+        assertThat(memoryUse.notificationId)
+            .isEqualTo(NotificationUtils.logKey("0|test_pkg|0|test|0"))
+        assertThat(memoryUse.objectUsage.smallIcon).isEqualTo(smallIcon)
+        assertThat(memoryUse.objectUsage.largeIcon).isEqualTo(largeIcon)
+        assertThat(memoryUse.objectUsage.bigPicture).isEqualTo(bigPicture)
+        if (style == null) {
+            assertThat(memoryUse.objectUsage.style).isNull()
+        } else {
+            assertThat(memoryUse.objectUsage.style).isEqualTo(style)
+        }
+        assertThat(memoryUse.objectUsage.styleIcon).isEqualTo(styleIcon)
+        assertThat(memoryUse.objectUsage.hasCustomView).isEqualTo(hasCustomView)
+    }
+
+    private fun getUseObject(
+        singleItemUseList: List<NotificationMemoryUsage>
+    ): NotificationMemoryUsage {
+        assertThat(singleItemUseList).hasSize(1)
+        return singleItemUseList[0]
+    }
+
+    private fun createNMMWithNotifications(
+        notifications: List<Notification>
+    ): NotificationMemoryMonitor {
+        val notifPipeline: NotifPipeline = mock()
+        val notificationEntries =
+            notifications.map { n ->
+                NotificationEntryBuilder().setTag("test").setNotification(n).build()
+            }
+        whenever(notifPipeline.allNotifs).thenReturn(notificationEntries)
+        return NotificationMemoryMonitor(notifPipeline, mock())
+    }
+}