diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
index 9b7d3bf..5f1ad56 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
@@ -82,6 +82,8 @@
     private static final String TAG = "TaskbarStashController";
     private static final boolean DEBUG = false;
 
+    private static boolean sEnableSoftwareImeForTests = false;
+
     /**
      * Def. value for @param shouldBubblesFollow in
      * {@link #updateAndAnimateTransientTaskbar(boolean)} */
@@ -131,19 +133,22 @@
      *
      * Use {@link #getStashDuration()} to query duration
      */
-    private static final long TASKBAR_STASH_DURATION = InsetsController.ANIMATION_DURATION_RESIZE;
+    @VisibleForTesting
+    static final long TASKBAR_STASH_DURATION = InsetsController.ANIMATION_DURATION_RESIZE;
 
     /**
      * How long to stash/unstash transient taskbar.
      *
      * Use {@link #getStashDuration()} to query duration.
      */
-    private static final long TRANSIENT_TASKBAR_STASH_DURATION = 417;
+    @VisibleForTesting
+    static final long TRANSIENT_TASKBAR_STASH_DURATION = 417;
 
     /**
      * How long to stash/unstash when keyboard is appearing/disappearing.
      */
-    private static final long TASKBAR_STASH_DURATION_FOR_IME = 80;
+    @VisibleForTesting
+    static final long TASKBAR_STASH_DURATION_FOR_IME = 80;
 
     /**
      * The scale TaskbarView animates to when being stashed.
@@ -164,7 +169,7 @@
     /**
      * How long the icon/stash handle alpha animation plays.
      */
-    public static final long TASKBAR_STASH_ALPHA_DURATION = 50;
+    public static final long TRANSIENT_TASKBAR_STASH_ALPHA_DURATION = 50;
 
     /**
      * How long to delay the icon/stash handle alpha for the home to app taskbar animation.
@@ -254,7 +259,7 @@
     private boolean mEnableBlockingTimeoutDuringTests = false;
 
     private Animator mTaskbarBackgroundAlphaAnimator;
-    private long mTaskbarBackgroundDuration;
+    private final long mTaskbarBackgroundDuration;
     private boolean mUserIsNotGoingHome = false;
 
     // Evaluate whether the handle should be stashed
@@ -801,14 +806,14 @@
             if (animationType == TRANSITION_HANDLE_FADE) {
                 // When fading, the handle fades in/out at the beginning of the transition with
                 // TASKBAR_STASH_ALPHA_DURATION.
-                backgroundAndHandleAlphaDuration = TASKBAR_STASH_ALPHA_DURATION;
+                backgroundAndHandleAlphaDuration = TRANSIENT_TASKBAR_STASH_ALPHA_DURATION;
                 // The iconAlphaDuration must be set to duration for the skippable interpolators
                 // below to work.
                 iconAlphaDuration = duration;
             } else {
                 iconAlphaStartDelay = TASKBAR_STASH_ALPHA_START_DELAY;
-                iconAlphaDuration = TASKBAR_STASH_ALPHA_DURATION;
-                backgroundAndHandleAlphaDuration = TASKBAR_STASH_ALPHA_DURATION;
+                iconAlphaDuration = TRANSIENT_TASKBAR_STASH_ALPHA_DURATION;
+                backgroundAndHandleAlphaDuration = TRANSIENT_TASKBAR_STASH_ALPHA_DURATION;
 
                 if (isStashed) {
                     if (animationType == TRANSITION_HOME_TO_APP) {
@@ -1084,7 +1089,8 @@
     /**
      * When hiding the IME, delay the unstash animation to align with the end of the transition.
      */
-    private long getTaskbarStashStartDelayForIme() {
+    @VisibleForTesting
+    long getTaskbarStashStartDelayForIme() {
         if (mIsImeShowing) {
             // Only delay when IME is exiting, not entering.
             return 0;
@@ -1144,13 +1150,13 @@
         }
 
         // Do not stash if pinned taskbar, hardware keyboard is attached and no IME is docked
-        if (mActivity.isHardwareKeyboard() && DisplayController.isPinnedTaskbar(mActivity)
+        if (isHardwareKeyboard() && DisplayController.isPinnedTaskbar(mActivity)
                 && !mActivity.isImeDocked()) {
             return false;
         }
 
         // Do not stash if hardware keyboard is attached, in 3 button nav and desktop windowing mode
-        if (mActivity.isHardwareKeyboard()
+        if (isHardwareKeyboard()
                 && mActivity.isThreeButtonNav()
                 && mControllers.taskbarDesktopModeController.getAreDesktopTasksVisible()) {
             return false;
@@ -1164,6 +1170,21 @@
         return mIsImeShowing || mIsImeSwitcherShowing;
     }
 
+    private boolean isHardwareKeyboard() {
+        return mActivity.isHardwareKeyboard() && !sEnableSoftwareImeForTests;
+    }
+
+    /**
+     * Overrides {@link #isHardwareKeyboard()} to {@code false} for testing, if enabled.
+     * <p>
+     * Virtual devices are sometimes in hardware keyboard mode, leading to an inconsistent
+     * testing environment.
+     */
+    @VisibleForTesting
+    static void enableSoftwareImeForTests(boolean enable) {
+        sEnableSoftwareImeForTests = enable;
+    }
+
     /**
      * Updates the proper flag to indicate whether the task bar should be stashed.
      *
@@ -1289,7 +1310,7 @@
     /**
      * Attempts to start timer to auto hide the taskbar based on time.
      */
-    public void tryStartTaskbarTimeout() {
+    private void tryStartTaskbarTimeout() {
         if (!DisplayController.isTransientTaskbar(mActivity)
                 || mIsStashed
                 || mEnableBlockingTimeoutDuringTests) {
@@ -1317,6 +1338,11 @@
         updateAndAnimateTransientTaskbarForTimeout();
     }
 
+    @VisibleForTesting
+    Alarm getTimeoutAlarm() {
+        return mTimeoutAlarm;
+    }
+
     @Override
     public void dumpLogs(String prefix, PrintWriter pw) {
         pw.println(prefix + "TaskbarStashController:");
diff --git a/quickstep/src/com/android/launcher3/taskbar/bubbles/stashing/TransientBubbleStashController.kt b/quickstep/src/com/android/launcher3/taskbar/bubbles/stashing/TransientBubbleStashController.kt
index 4f0337d..74e3c00 100644
--- a/quickstep/src/com/android/launcher3/taskbar/bubbles/stashing/TransientBubbleStashController.kt
+++ b/quickstep/src/com/android/launcher3/taskbar/bubbles/stashing/TransientBubbleStashController.kt
@@ -32,8 +32,8 @@
 import com.android.launcher3.anim.AnimatedFloat
 import com.android.launcher3.anim.SpringAnimationBuilder
 import com.android.launcher3.taskbar.TaskbarInsetsController
-import com.android.launcher3.taskbar.TaskbarStashController.TASKBAR_STASH_ALPHA_DURATION
 import com.android.launcher3.taskbar.TaskbarStashController.TASKBAR_STASH_ALPHA_START_DELAY
+import com.android.launcher3.taskbar.TaskbarStashController.TRANSIENT_TASKBAR_STASH_ALPHA_DURATION
 import com.android.launcher3.taskbar.bubbles.BubbleBarViewController
 import com.android.launcher3.taskbar.bubbles.BubbleStashedHandleViewController
 import com.android.launcher3.taskbar.bubbles.stashing.BubbleStashController.Companion.BAR_STASH_DURATION
@@ -305,7 +305,8 @@
 
         animatorSet.play(
             createBackgroundAlphaAnimator(isStashed).apply {
-                val alphaDuration = if (isStashed) duration else TASKBAR_STASH_ALPHA_DURATION
+                val alphaDuration =
+                    if (isStashed) duration else TRANSIENT_TASKBAR_STASH_ALPHA_DURATION
                 val alphaDelay = if (isStashed) TASKBAR_STASH_ALPHA_START_DELAY else 0L
                 this.duration = max(0L, alphaDuration - alphaDelay)
                 this.startDelay = alphaDelay
@@ -317,7 +318,7 @@
             bubbleBarBubbleAlpha
                 .animateToValue(getBarAlphaStart(isStashed), getBarAlphaEnd(isStashed))
                 .apply {
-                    this.duration = TASKBAR_STASH_ALPHA_DURATION
+                    this.duration = TRANSIENT_TASKBAR_STASH_ALPHA_DURATION
                     this.startDelay = TASKBAR_STASH_ALPHA_START_DELAY
                     this.interpolator = LINEAR
                 }
diff --git a/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarStashControllerTest.kt b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarStashControllerTest.kt
new file mode 100644
index 0000000..e736446
--- /dev/null
+++ b/quickstep/tests/multivalentTests/src/com/android/launcher3/taskbar/TaskbarStashControllerTest.kt
@@ -0,0 +1,681 @@
+/*
+ * Copyright (C) 2024 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.launcher3.taskbar
+
+import android.animation.AnimatorTestRule
+import android.platform.test.annotations.EnableFlags
+import androidx.test.platform.app.InstrumentationRegistry.getInstrumentation
+import com.android.launcher3.R
+import com.android.launcher3.taskbar.StashedHandleViewController.ALPHA_INDEX_STASHED
+import com.android.launcher3.taskbar.TaskbarAutohideSuspendController.FLAG_AUTOHIDE_SUSPEND_EDU_OPEN
+import com.android.launcher3.taskbar.TaskbarStashController.FLAG_IN_APP
+import com.android.launcher3.taskbar.TaskbarStashController.FLAG_IN_OVERVIEW
+import com.android.launcher3.taskbar.TaskbarStashController.FLAG_IN_STASHED_LAUNCHER_STATE
+import com.android.launcher3.taskbar.TaskbarStashController.FLAG_STASHED_DEVICE_LOCKED
+import com.android.launcher3.taskbar.TaskbarStashController.FLAG_STASHED_IME
+import com.android.launcher3.taskbar.TaskbarStashController.FLAG_STASHED_IN_APP_AUTO
+import com.android.launcher3.taskbar.TaskbarStashController.FLAG_STASHED_SMALL_SCREEN
+import com.android.launcher3.taskbar.TaskbarStashController.FLAG_STASHED_SYSUI
+import com.android.launcher3.taskbar.TaskbarStashController.TASKBAR_STASH_DURATION
+import com.android.launcher3.taskbar.TaskbarStashController.TASKBAR_STASH_DURATION_FOR_IME
+import com.android.launcher3.taskbar.TaskbarStashController.TRANSIENT_TASKBAR_STASH_ALPHA_DURATION
+import com.android.launcher3.taskbar.TaskbarStashController.TRANSIENT_TASKBAR_STASH_DURATION
+import com.android.launcher3.taskbar.TaskbarViewController.ALPHA_INDEX_STASH
+import com.android.launcher3.taskbar.bubbles.BubbleControllers
+import com.android.launcher3.taskbar.rules.TaskbarModeRule
+import com.android.launcher3.taskbar.rules.TaskbarModeRule.Mode.PINNED
+import com.android.launcher3.taskbar.rules.TaskbarModeRule.Mode.THREE_BUTTONS
+import com.android.launcher3.taskbar.rules.TaskbarModeRule.Mode.TRANSIENT
+import com.android.launcher3.taskbar.rules.TaskbarModeRule.TaskbarMode
+import com.android.launcher3.taskbar.rules.TaskbarPinningPreferenceRule
+import com.android.launcher3.taskbar.rules.TaskbarUnitTestRule
+import com.android.launcher3.taskbar.rules.TaskbarUnitTestRule.InjectController
+import com.android.launcher3.taskbar.rules.TaskbarUnitTestRule.UserSetupMode
+import com.android.launcher3.taskbar.rules.TaskbarWindowSandboxContext
+import com.android.launcher3.util.LauncherMultivalentJUnit
+import com.android.launcher3.util.LauncherMultivalentJUnit.EmulatedDevices
+import com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_BUBBLES_EXPANDED
+import com.android.systemui.shared.system.QuickStepContract.SYSUI_STATE_IME_SHOWING
+import com.android.wm.shell.Flags.FLAG_ENABLE_BUBBLE_BAR
+import com.google.common.truth.Truth.assertThat
+import java.util.Optional
+import org.junit.After
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(LauncherMultivalentJUnit::class)
+@EmulatedDevices(["pixelTablet2023"])
+class TaskbarStashControllerTest {
+    private val context = TaskbarWindowSandboxContext.create(getInstrumentation().targetContext)
+
+    @get:Rule(order = 0) val taskbarModeRule = TaskbarModeRule(context)
+    @get:Rule(order = 1) val taskbarPinningPreferenceRule = TaskbarPinningPreferenceRule(context)
+    @get:Rule(order = 2) val animatorTestRule = AnimatorTestRule(this)
+    @get:Rule(order = 3) val taskbarUnitTestRule = TaskbarUnitTestRule(this, context)
+
+    @InjectController lateinit var stashController: TaskbarStashController
+    @InjectController lateinit var viewController: TaskbarViewController
+    @InjectController lateinit var stashedHandleViewController: StashedHandleViewController
+    @InjectController lateinit var dragLayerController: TaskbarDragLayerController
+    @InjectController lateinit var autohideSuspendController: TaskbarAutohideSuspendController
+    @InjectController lateinit var bubbleControllers: Optional<BubbleControllers>
+
+    private val activityContext by taskbarUnitTestRule::activityContext
+
+    // Disable hardware keyboard mode during tests.
+    @Before fun enableSoftwareIme() = TaskbarStashController.enableSoftwareImeForTests(true)
+
+    @After fun resetIme() = TaskbarStashController.enableSoftwareImeForTests(false)
+
+    @After fun cancelTimeoutIfExists() = stashController.cancelTimeoutIfExists()
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testInit_transientMode_stashedInApp() {
+        assertThat(stashController.isStashedInApp).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testInit_pinnedMode_unstashedInApp() {
+        assertThat(stashController.isStashedInApp).isFalse()
+    }
+
+    @Test
+    @UserSetupMode
+    @TaskbarMode(PINNED)
+    fun testInit_userSetupWithPinnedMode_stashedInApp() {
+        assertThat(stashController.isStashedInApp).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testSetSetupUiVisible_true_stashedInApp() {
+        getInstrumentation().runOnMainSync { stashController.setSetupUIVisible(true) }
+        assertThat(stashController.isStashedInApp).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testSetSetupUiVisible_false_unstashedInApp() {
+        getInstrumentation().runOnMainSync { stashController.setSetupUIVisible(false) }
+        assertThat(stashController.isStashedInApp).isFalse()
+    }
+
+    @Test
+    fun testRecreateAsTransient_timeoutStarted() {
+        taskbarPinningPreferenceRule.isPinned = true
+        activityContext.controllers.sharedState?.taskbarWasPinned = true
+
+        taskbarPinningPreferenceRule.isPinned = false
+        assertThat(stashController.timeoutAlarm.alarmPending()).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testSupportsVisualStashing_transientMode_supported() {
+        assertThat(stashController.supportsVisualStashing()).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testSupportsVisualStashing_pinnedMode_supported() {
+        assertThat(stashController.supportsVisualStashing()).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(THREE_BUTTONS)
+    fun testSupportsVisualStashing_threeButtonsMode_unsupported() {
+        assertThat(stashController.supportsVisualStashing()).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testGetStashDuration_transientMode() {
+        assertThat(stashController.stashDuration).isEqualTo(TRANSIENT_TASKBAR_STASH_DURATION)
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testGetStashDuration_pinnedMode() {
+        assertThat(stashController.stashDuration).isEqualTo(TASKBAR_STASH_DURATION)
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testIsStashed_pinnedInApp_isUnstashed() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_IN_APP, true)
+            stashController.applyState(0)
+        }
+        assertThat(stashController.isStashed).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testIsStashed_transientInApp_isStashed() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_IN_APP, true)
+            stashController.applyState(0)
+        }
+        assertThat(stashController.isStashed).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testIsStashed_transientNotInApp_isUnstashed() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_IN_APP, false)
+            stashController.applyState(0)
+        }
+        assertThat(stashController.isStashed).isFalse()
+    }
+
+    @Test
+    fun testIsStashed_stashedInLauncherState_isStashed() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_IN_APP, false)
+            stashController.updateStateForFlag(FLAG_IN_STASHED_LAUNCHER_STATE, true)
+            stashController.applyState(0)
+        }
+        assertThat(stashController.isStashed).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testIsStashed_transientInOverview_isUnstashed() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_IN_APP, false)
+            stashController.updateStateForFlag(FLAG_IN_OVERVIEW, true)
+            stashController.applyState(0)
+        }
+        assertThat(stashController.isStashed).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testIsStashed_pinnedInOverviewWithIme_isStashed() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_IN_APP, false)
+            stashController.updateStateForFlag(FLAG_IN_OVERVIEW, true)
+            stashController.updateStateForFlag(FLAG_STASHED_IME, true)
+            stashController.applyState(0)
+        }
+        assertThat(stashController.isStashed).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testIsStashed_pinnedTaskbarWithPinnedApp_isStashed() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_IN_APP, true)
+            stashController.updateStateForFlag(FLAG_STASHED_SYSUI, true) // App pinned.
+            stashController.applyState(0)
+        }
+        assertThat(stashController.isStashed).isTrue()
+    }
+
+    @Test
+    fun testIsInStashedLauncherState_flagUnset_false() {
+        stashController.updateStateForFlag(FLAG_IN_STASHED_LAUNCHER_STATE, false)
+        assertThat(stashController.isInStashedLauncherState).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(THREE_BUTTONS)
+    fun testIsInStashedLauncherState_flagSetInThreeButtonsMode_false() {
+        stashController.updateStateForFlag(FLAG_IN_STASHED_LAUNCHER_STATE, true)
+        assertThat(stashController.isInStashedLauncherState).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testIsInStashedLauncherState_flagSetInPinnedMode_true() {
+        stashController.updateStateForFlag(FLAG_IN_STASHED_LAUNCHER_STATE, true)
+        assertThat(stashController.isInStashedLauncherState).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testIsTaskbarVisibleAndNotStashing_pinnedButNotVisible_false() {
+        getInstrumentation().runOnMainSync {
+            viewController.taskbarIconAlpha.get(ALPHA_INDEX_STASH).value = 0f
+        }
+        assertThat(stashController.isTaskbarVisibleAndNotStashing).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testIsTaskbarVisibleAndNotStashing_visibleButStashed_false() {
+        getInstrumentation().runOnMainSync {
+            viewController.taskbarIconAlpha.get(ALPHA_INDEX_STASH).value = 1f
+        }
+        assertThat(stashController.isTaskbarVisibleAndNotStashing).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testIsTaskbarVisibleAndNotStashing_pinnedAndVisible_true() {
+        getInstrumentation().runOnMainSync {
+            viewController.taskbarIconAlpha.get(ALPHA_INDEX_STASH).value = 1f
+        }
+        assertThat(stashController.isTaskbarVisibleAndNotStashing).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testGetTouchableHeight_isStashed_stashedHeight() {
+        assertThat(stashController.touchableHeight).isEqualTo(stashController.stashedHeight)
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testGetTouchableHeight_unstashedTransientMode_heightAndBottomMargin() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_STASHED_IN_APP_AUTO, false)
+            stashController.applyState(0)
+        }
+
+        val expectedHeight =
+            activityContext.deviceProfile.run { taskbarHeight + taskbarBottomMargin }
+        assertThat(stashController.touchableHeight).isEqualTo(expectedHeight)
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testGetTouchableHeight_pinnedMode_taskbarHeight() {
+        assertThat(stashController.touchableHeight)
+            .isEqualTo(activityContext.deviceProfile.taskbarHeight)
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testGetContentHeightToReportToApps_transientMode_stashedHeight() {
+        assertThat(stashController.contentHeightToReportToApps)
+            .isEqualTo(stashController.stashedHeight)
+    }
+
+    @Test
+    @TaskbarMode(THREE_BUTTONS)
+    fun testGetContentHeightToReportToApps_threeButtonsMode_taskbarHeight() {
+        assertThat(stashController.contentHeightToReportToApps)
+            .isEqualTo(activityContext.deviceProfile.taskbarHeight)
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testGetContentHeightToReportToApps_pinnedMode_taskbarHeight() {
+        assertThat(stashController.contentHeightToReportToApps)
+            .isEqualTo(activityContext.deviceProfile.taskbarHeight)
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    @UserSetupMode
+    fun testGetContentHeightToReportToApps_pinnedInSetupMode_setupWizardInsets() {
+        assertThat(stashController.contentHeightToReportToApps)
+            .isEqualTo(context.resources.getDimensionPixelSize(R.dimen.taskbar_suw_insets))
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testGetContentHeightToReportToApps_pinnedModeButFolded_stashedHeight() {
+        getInstrumentation().runOnMainSync {
+            stashedHandleViewController.stashedHandleAlpha.get(ALPHA_INDEX_STASHED).value = 1f
+            stashController.updateStateForFlag(FLAG_STASHED_SMALL_SCREEN, true)
+        }
+        assertThat(stashController.contentHeightToReportToApps)
+            .isEqualTo(stashController.stashedHeight)
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testGetContentHeightToReportToApps_homeDisabledWhenFolded_zeroHeight() {
+        getInstrumentation().runOnMainSync {
+            stashedHandleViewController.stashedHandleAlpha.get(ALPHA_INDEX_STASHED).value = 1f
+            stashedHandleViewController.setIsHomeButtonDisabled(true)
+            stashController.updateStateForFlag(FLAG_STASHED_SMALL_SCREEN, true)
+        }
+        assertThat(stashController.contentHeightToReportToApps).isEqualTo(0)
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testGetTappableHeightToReportToApps_transientMode_zeroHeight() {
+        assertThat(stashController.tappableHeightToReportToApps).isEqualTo(0)
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testGetTappableHeightToReportToApps_pinnedMode_taskbarHeight() {
+        assertThat(stashController.tappableHeightToReportToApps)
+            .isEqualTo(activityContext.deviceProfile.taskbarHeight)
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testUpdateAndAnimateTransientTaskbar_unstashTaskbar_updatesState() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateAndAnimateTransientTaskbar(false)
+        }
+        assertThat(stashController.isStashed).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testUpdateAndAnimateTransientTaskbar_runUnstashAnimation_startsTaskbarTimeout() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateAndAnimateTransientTaskbar(false)
+            animatorTestRule.advanceTimeBy(stashController.stashDuration)
+        }
+        assertThat(stashController.timeoutAlarm.alarmPending()).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testUpdateAndAnimateTransientTaskbar_finishTaskbarTimeout_taskbarStashes() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateAndAnimateTransientTaskbar(false)
+            animatorTestRule.advanceTimeBy(stashController.stashDuration)
+        }
+        assertThat(stashController.timeoutAlarm.alarmPending()).isTrue()
+
+        getInstrumentation().runOnMainSync {
+            stashController.timeoutAlarm.finishAlarm()
+            animatorTestRule.advanceTimeBy(stashController.stashDuration)
+        }
+        assertThat(stashController.isStashed).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testUpdateAndAnimateTransientTaskbar_autoHideSuspendedForEdu_remainsUnstashed() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateAndAnimateTransientTaskbar(false)
+            animatorTestRule.advanceTimeBy(stashController.stashDuration)
+        }
+
+        getInstrumentation().runOnMainSync {
+            autohideSuspendController.updateFlag(FLAG_AUTOHIDE_SUSPEND_EDU_OPEN, true)
+            stashController.updateAndAnimateTransientTaskbar(true)
+            animatorTestRule.advanceTimeBy(stashController.stashDuration)
+        }
+        assertThat(stashController.isStashed).isFalse()
+    }
+
+    @Test
+    @EnableFlags(FLAG_ENABLE_BUBBLE_BAR)
+    @TaskbarMode(TRANSIENT)
+    fun testUpdateAndAnimateTransientTaskbar_unstashTaskbarWithBubbles_bubbleBarUnstashes() {
+        getInstrumentation().runOnMainSync {
+            bubbleControllers.get().bubbleBarViewController.setHiddenForBubbles(false)
+            bubbleControllers.get().bubbleStashController.stashBubbleBarImmediate()
+            stashController.updateAndAnimateTransientTaskbar(false, true)
+        }
+        assertThat(bubbleControllers.get().bubbleStashController.isStashed).isFalse()
+    }
+
+    @Test
+    @EnableFlags(FLAG_ENABLE_BUBBLE_BAR)
+    @TaskbarMode(TRANSIENT)
+    fun testUpdateAndAnimateTransientTaskbar_unstashTaskbarWithoutBubbles_bubbleBarStashed() {
+        getInstrumentation().runOnMainSync {
+            bubbleControllers.get().bubbleBarViewController.setHiddenForBubbles(false)
+            bubbleControllers.get().bubbleStashController.stashBubbleBarImmediate()
+            stashController.updateAndAnimateTransientTaskbar(false, false)
+        }
+        assertThat(bubbleControllers.get().bubbleStashController.isStashed).isTrue()
+    }
+
+    @Test
+    @EnableFlags(FLAG_ENABLE_BUBBLE_BAR)
+    @TaskbarMode(TRANSIENT)
+    fun testUpdateAndAnimateTransientTaskbar_stashTaskbarWithBubbles_bubbleBarStashes() {
+        getInstrumentation().runOnMainSync {
+            bubbleControllers.get().bubbleBarViewController.setHiddenForBubbles(false)
+            bubbleControllers.get().bubbleStashController.showBubbleBarImmediate()
+            stashController.updateAndAnimateTransientTaskbar(true, true)
+        }
+        assertThat(bubbleControllers.get().bubbleStashController.isStashed).isTrue()
+    }
+
+    @Test
+    @EnableFlags(FLAG_ENABLE_BUBBLE_BAR)
+    @TaskbarMode(TRANSIENT)
+    fun testUpdateAndAnimateTransientTaskbar_stashTaskbarWithoutBubbles_bubbleBarUnstashed() {
+        getInstrumentation().runOnMainSync {
+            bubbleControllers.get().bubbleBarViewController.setHiddenForBubbles(false)
+            bubbleControllers.get().bubbleStashController.showBubbleBarImmediate()
+            stashController.updateAndAnimateTransientTaskbar(true, false)
+        }
+        assertThat(bubbleControllers.get().bubbleStashController.isStashed).isFalse()
+    }
+
+    @Test
+    @EnableFlags(FLAG_ENABLE_BUBBLE_BAR)
+    @TaskbarMode(TRANSIENT)
+    fun testUpdateAndAnimateTransientTaskbar_bubbleBarExpandedBeforeTimeout_expandedAfterwards() {
+        getInstrumentation().runOnMainSync {
+            bubbleControllers.get().bubbleBarViewController.setHiddenForBubbles(false)
+            bubbleControllers.get().bubbleBarViewController.isExpanded = true
+            stashController.updateAndAnimateTransientTaskbar(false)
+            animatorTestRule.advanceTimeBy(stashController.stashDuration)
+        }
+        assertThat(stashController.timeoutAlarm.alarmPending()).isTrue()
+
+        getInstrumentation().runOnMainSync {
+            stashController.timeoutAlarm.finishAlarm()
+            animatorTestRule.advanceTimeBy(stashController.stashDuration)
+        }
+        assertThat(bubbleControllers.get().bubbleBarViewController.isExpanded).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testToggleTaskbarStash_pinnedMode_doesNothing() {
+        getInstrumentation().runOnMainSync { stashController.toggleTaskbarStash() }
+        assertThat(stashController.isStashed).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testToggleTaskbarStash_transientMode_unstashesTaskbar() {
+        getInstrumentation().runOnMainSync { stashController.toggleTaskbarStash() }
+        assertThat(stashController.isStashed).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testToggleTaskbarStash_twiceInTransientMode_stashesTaskbar() {
+        getInstrumentation().runOnMainSync {
+            stashController.toggleTaskbarStash()
+            stashController.toggleTaskbarStash()
+        }
+        assertThat(stashController.isStashed).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testToggleTaskbarStash_notInAppWithTransientMode_doesNothing() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_IN_APP, false)
+            stashController.applyState(0)
+            stashController.toggleTaskbarStash()
+        }
+        assertThat(stashController.isStashed).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testAnimateTransientTaskbar_bubblesShownInOverview_stashesTaskbar() {
+        // Start in Overview. Should unstash Taskbar.
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_STASHED_IN_APP_AUTO, false)
+            stashController.updateStateForFlag(FLAG_IN_APP, false)
+            stashController.updateStateForFlag(FLAG_IN_OVERVIEW, true)
+            stashController.applyState(0)
+        }
+        assertThat(stashController.isStashed).isFalse()
+
+        // Expand bubbles. Should stash Taskbar.
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForSysuiFlags(SYSUI_STATE_BUBBLES_EXPANDED, false)
+            animatorTestRule.advanceTimeBy(TASKBAR_STASH_DURATION)
+        }
+        assertThat(stashController.isStashed).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testAnimatePinnedTaskbar_imeShown_replacesIconsWithHandle() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForSysuiFlags(SYSUI_STATE_IME_SHOWING, false)
+            animatorTestRule.advanceTimeBy(TASKBAR_STASH_DURATION_FOR_IME)
+        }
+        assertThat(viewController.areIconsVisible()).isFalse()
+        assertThat(stashedHandleViewController.isStashedHandleVisible).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testAnimatePinnedTaskbar_imeHidden_replacesHandleWithIcons() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForSysuiFlags(SYSUI_STATE_IME_SHOWING, true)
+            animatorTestRule.advanceTimeBy(0)
+        }
+
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForSysuiFlags(0, true)
+            animatorTestRule.advanceTimeBy(0)
+        }
+        assertThat(stashedHandleViewController.isStashedHandleVisible).isFalse()
+        assertThat(viewController.areIconsVisible()).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testAnimatePinnedTaskbar_imeHidden_verifyAnimationDuration() {
+        // Start with IME shown.
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForSysuiFlags(SYSUI_STATE_IME_SHOWING, true)
+            animatorTestRule.advanceTimeBy(0)
+        }
+
+        // Hide IME with animation.
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForSysuiFlags(0, false)
+            // Fast forward without start delay.
+            animatorTestRule.advanceTimeBy(TASKBAR_STASH_DURATION_FOR_IME)
+        }
+        // Icons should not be visible yet due to start delay.
+        assertThat(viewController.areIconsVisible()).isFalse()
+
+        // Advance by start delay retroactively. Animation should complete.
+        getInstrumentation().runOnMainSync {
+            animatorTestRule.advanceTimeBy(stashController.taskbarStashStartDelayForIme)
+        }
+        assertThat(viewController.areIconsVisible()).isTrue()
+    }
+
+    @Test
+    @TaskbarMode(THREE_BUTTONS)
+    fun testAnimateThreeButtonsTaskbar_imeShown_hidesIconsAndBg() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForSysuiFlags(SYSUI_STATE_IME_SHOWING, false)
+            animatorTestRule.advanceTimeBy(TASKBAR_STASH_DURATION_FOR_IME)
+        }
+        assertThat(viewController.areIconsVisible()).isFalse()
+        assertThat(dragLayerController.imeBgTaskbar.value).isEqualTo(0)
+    }
+
+    @Test
+    @TaskbarMode(THREE_BUTTONS)
+    fun testAnimateThreeButtonsTaskbar_imeHidden_showsIconsAndBg() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForSysuiFlags(SYSUI_STATE_IME_SHOWING, false)
+            animatorTestRule.advanceTimeBy(TASKBAR_STASH_DURATION_FOR_IME)
+        }
+
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForSysuiFlags(0, false)
+            animatorTestRule.advanceTimeBy(
+                TASKBAR_STASH_DURATION_FOR_IME + stashController.taskbarStashStartDelayForIme
+            )
+        }
+        assertThat(viewController.areIconsVisible()).isTrue()
+        assertThat(dragLayerController.imeBgTaskbar.value).isEqualTo(1)
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testSetSystemGestureInProgress_whileImeShown_unstashesTaskbar() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForSysuiFlags(SYSUI_STATE_IME_SHOWING, true)
+            animatorTestRule.advanceTimeBy(0)
+        }
+
+        getInstrumentation().runOnMainSync {
+            stashController.setSystemGestureInProgress(true)
+            animatorTestRule.advanceTimeBy(
+                TASKBAR_STASH_DURATION_FOR_IME + stashController.taskbarStashStartDelayForIme
+            )
+        }
+        assertThat(stashController.isStashed).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(PINNED)
+    fun testUnlockTransition_pinnedMode_fadesOutHandle() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_STASHED_DEVICE_LOCKED, true)
+            stashController.applyState(0)
+        }
+        assertThat(stashedHandleViewController.isStashedHandleVisible).isTrue()
+
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_STASHED_DEVICE_LOCKED, false)
+            stashController.applyState()
+            animatorTestRule.advanceTimeBy(stashController.stashDuration)
+        }
+        assertThat(stashedHandleViewController.isStashedHandleVisible).isFalse()
+    }
+
+    @Test
+    @TaskbarMode(TRANSIENT)
+    fun testUnlockTransition_transientMode_fadesOutHandleEarly() {
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_IN_APP, false)
+            stashController.updateStateForFlag(FLAG_STASHED_DEVICE_LOCKED, true)
+            stashController.applyState(0)
+        }
+        assertThat(stashedHandleViewController.isStashedHandleVisible).isTrue()
+
+        getInstrumentation().runOnMainSync {
+            stashController.updateStateForFlag(FLAG_STASHED_DEVICE_LOCKED, false)
+            stashController.applyState()
+            // Time it takes for just the handle to hide (full stash animation is longer).
+            animatorTestRule.advanceTimeBy(TRANSIENT_TASKBAR_STASH_ALPHA_DURATION)
+        }
+        assertThat(stashedHandleViewController.isStashedHandleVisible).isFalse()
+    }
+}
+
+private fun TaskbarStashController.updateStateForFlag(flag: Int, value: Boolean) {
+    updateStateForFlag(flag.toLong(), value)
+}
diff --git a/src/com/android/launcher3/Alarm.java b/src/com/android/launcher3/Alarm.java
index fb8088c..e516ad0 100644
--- a/src/com/android/launcher3/Alarm.java
+++ b/src/com/android/launcher3/Alarm.java
@@ -20,6 +20,8 @@
 import android.os.Looper;
 import android.os.SystemClock;
 
+import androidx.annotation.VisibleForTesting;
+
 public class Alarm implements Runnable{
     // if we reach this time and the alarm hasn't been cancelled, call the listener
     private long mAlarmTriggerTime;
@@ -96,4 +98,13 @@
     public long getLastSetTimeout() {
         return mLastSetTimeout;
     }
+
+    /** Simulates the alarm firing for tests. */
+    @VisibleForTesting
+    public void finishAlarm() {
+        if (!mAlarmPending) return;
+        mAlarmPending = false;
+        mHandler.removeCallbacks(this);
+        mAlarmListener.onAlarm(this);
+    }
 }