Implement class to evaluate current use of Notification object memory

This evaluates the size of Notification objects in memory and emits the sizes to bugreport. The change is flag guarded.

Bug:194112194
Bug:235451049

Test: Unit tests added.

Change-Id: Iab91f35b77cf8acc07fe3466656ae3cab26a295b
Merged-In: Ie385e74b672f6755cec51b2046243d0c5dad43ee
Merged-In: Iab91f35b77cf8acc07fe3466656ae3cab26a295b

5 files changed, 616 insertions, 0 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/flags/Flags.java b/packages/SystemUI/src/com/android/systemui/flags/Flags.java
index 43742a8a3696..b75f9f239207 100644
--- 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
 
     /***************************************/
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/init/NotificationsControllerImpl.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/init/NotificationsControllerImpl.kt
index 1aa02951f3f7..8e646a37a4b3 100644
--- 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
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/logging/NotificationMemory.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/logging/NotificationMemory.kt
new file mode 100644
index 000000000000..832a739a9080
--- /dev/null
+++ 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,
+)
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/logging/NotificationMemoryMonitor.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/logging/NotificationMemoryMonitor.kt
new file mode 100644
index 000000000000..958978ecd858
--- /dev/null
+++ 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
+    }
+}
diff --git 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
new file mode 100644
index 000000000000..16e2441c556b
--- /dev/null
+++ 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())
+    }
+}