diff --git a/Android.bp b/Android.bp
index f5a38b4..3aa9394 100644
--- a/Android.bp
+++ b/Android.bp
@@ -208,6 +208,8 @@
     srcs: [
         "ext_tests/src/**/*.java",
         "ext_tests/src/**/*.kt",
+        "quickstep/ext_tests/src/**/*.java",
+        "quickstep/ext_tests/src/**/*.kt",
     ],
 }
 
diff --git a/ext_tests/src/com/android/launcher3/testing/DebugTestInformationHandler.java b/ext_tests/src/com/android/launcher3/testing/DebugTestInformationHandler.java
index 02206c0..d16e12c 100644
--- a/ext_tests/src/com/android/launcher3/testing/DebugTestInformationHandler.java
+++ b/ext_tests/src/com/android/launcher3/testing/DebugTestInformationHandler.java
@@ -29,8 +29,10 @@
 import androidx.annotation.Keep;
 import androidx.annotation.Nullable;
 
+import com.android.launcher3.BubbleTextView;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherSettings;
+import com.android.launcher3.ShortcutAndWidgetContainer;
 
 import java.util.ArrayList;
 import java.util.Collection;
@@ -205,6 +207,32 @@
                 }
             }
 
+            case TestProtocol.REQUEST_USE_TEST_WORKSPACE_LAYOUT: {
+                useTestWorkspaceLayout(true);
+                return response;
+            }
+
+            case TestProtocol.REQUEST_USE_DEFAULT_WORKSPACE_LAYOUT: {
+                useTestWorkspaceLayout(false);
+                return response;
+            }
+
+            case TestProtocol.REQUEST_HOTSEAT_ICON_NAMES: {
+                return getLauncherUIProperty(Bundle::putStringArrayList, l -> {
+                    ShortcutAndWidgetContainer hotseatIconsContainer =
+                            l.getHotseat().getShortcutsAndWidgets();
+                    ArrayList<String> hotseatIconNames = new ArrayList<>();
+
+                    for (int i = 0; i < hotseatIconsContainer.getChildCount(); i++) {
+                        // Use unchecked cast to catch changes in hotseat layout
+                        BubbleTextView icon = (BubbleTextView) hotseatIconsContainer.getChildAt(i);
+                        hotseatIconNames.add((String) icon.getText());
+                    }
+
+                    return hotseatIconNames;
+                });
+            }
+
             case TestProtocol.REQUEST_GET_ACTIVITIES_CREATED_COUNT: {
                 response.putInt(TestProtocol.TEST_INFO_RESPONSE_FIELD, sActivitiesCreatedCount);
                 return response;
@@ -223,4 +251,15 @@
                 return super.call(method, arg, extras);
         }
     }
+
+    private void useTestWorkspaceLayout(boolean useTestWorkspaceLayout) {
+        final long identity = Binder.clearCallingIdentity();
+        try {
+            LauncherSettings.Settings.call(mContext.getContentResolver(), useTestWorkspaceLayout
+                    ? LauncherSettings.Settings.METHOD_SET_USE_TEST_WORKSPACE_LAYOUT_FLAG
+                    : LauncherSettings.Settings.METHOD_CLEAR_USE_TEST_WORKSPACE_LAYOUT_FLAG);
+        } finally {
+            Binder.restoreCallingIdentity(identity);
+        }
+    }
 }
diff --git a/quickstep/ext_tests/src/com/android/quickstep/DebugQuickstepTestInformationHandler.java b/quickstep/ext_tests/src/com/android/quickstep/DebugQuickstepTestInformationHandler.java
new file mode 100644
index 0000000..e5f0295
--- /dev/null
+++ b/quickstep/ext_tests/src/com/android/quickstep/DebugQuickstepTestInformationHandler.java
@@ -0,0 +1,120 @@
+/*
+ * 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.quickstep;
+
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.os.Bundle;
+
+import androidx.annotation.Nullable;
+
+import com.android.launcher3.BaseQuickstepLauncher;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.R;
+import com.android.launcher3.taskbar.LauncherTaskbarUIController;
+import com.android.launcher3.testing.DebugTestInformationHandler;
+import com.android.launcher3.testing.TestProtocol;
+
+import java.util.concurrent.ExecutionException;
+
+/**
+ * Class to handle requests from tests, including debug ones, to Quickstep Launcher builds.
+ */
+public abstract class DebugQuickstepTestInformationHandler extends QuickstepTestInformationHandler {
+
+    private final DebugTestInformationHandler mDebugTestInformationHandler;
+
+    public DebugQuickstepTestInformationHandler(Context context) {
+        super(context);
+        mDebugTestInformationHandler = new DebugTestInformationHandler(context);
+    }
+
+    @Override
+    public Bundle call(String method, String arg, @Nullable Bundle extras) {
+        Bundle response = new Bundle();
+        switch (method) {
+            case TestProtocol.REQUEST_ENABLE_MANUAL_TASKBAR_STASHING:
+                runOnUIThread(l -> {
+                    enableManualTaskbarStashing(l, true);
+                });
+                return response;
+
+            case TestProtocol.REQUEST_DISABLE_MANUAL_TASKBAR_STASHING:
+                runOnUIThread(l -> {
+                    enableManualTaskbarStashing(l, false);
+                });
+                return response;
+
+            case TestProtocol.REQUEST_UNSTASH_TASKBAR_IF_STASHED:
+                runOnUIThread(l -> {
+                    enableManualTaskbarStashing(l, true);
+
+                    BaseQuickstepLauncher quickstepLauncher = (BaseQuickstepLauncher) l;
+                    LauncherTaskbarUIController taskbarUIController =
+                            quickstepLauncher.getTaskbarUIController();
+
+                    // Allow null-pointer to catch illegal states.
+                    taskbarUIController.unstashTaskbarIfStashed();
+
+                    enableManualTaskbarStashing(l, false);
+                });
+                return response;
+
+            case TestProtocol.REQUEST_STASHED_TASKBAR_HEIGHT: {
+                final Resources resources = mContext.getResources();
+                response.putInt(TestProtocol.TEST_INFO_RESPONSE_FIELD,
+                        resources.getDimensionPixelSize(R.dimen.taskbar_stashed_size));
+                return response;
+            }
+
+            default:
+                response = super.call(method, arg, extras);
+                if (response != null) return response;
+                return mDebugTestInformationHandler.call(method, arg, extras);
+        }
+    }
+
+    private void enableManualTaskbarStashing(Launcher launcher, boolean enable) {
+        BaseQuickstepLauncher quickstepLauncher = (BaseQuickstepLauncher) launcher;
+        LauncherTaskbarUIController taskbarUIController =
+                quickstepLauncher.getTaskbarUIController();
+
+        // Allow null-pointer to catch illegal states.
+        taskbarUIController.enableManualStashingForTests(enable);
+    }
+
+    /**
+     * Runs the given command on the UI thread.
+     */
+    private static void runOnUIThread(UIThreadCommand command) {
+        try {
+            MAIN_EXECUTOR.submit(() -> {
+                command.execute(Launcher.ACTIVITY_TRACKER.getCreatedActivity());
+                return null;
+            }).get();
+        } catch (ExecutionException | InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private interface UIThreadCommand {
+
+        void execute(Launcher launcher);
+    }
+}
+
diff --git a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
index 9a70146..f14e2a2 100644
--- a/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
+++ b/quickstep/src/com/android/launcher3/QuickstepTransitionManager.java
@@ -111,6 +111,7 @@
 import com.android.launcher3.views.FloatingIconView;
 import com.android.launcher3.views.ScrimView;
 import com.android.launcher3.widget.LauncherAppWidgetHostView;
+import com.android.quickstep.LauncherBackAnimationController;
 import com.android.quickstep.RemoteAnimationTargets;
 import com.android.quickstep.SystemUiProxy;
 import com.android.quickstep.TaskViewUtils;
@@ -216,6 +217,7 @@
     private RemoteAnimationFactory mWallpaperOpenTransitionRunner;
     private RemoteTransitionCompat mLauncherOpenTransition;
 
+    private LauncherBackAnimationController mBackAnimationController;
     private final AnimatorListenerAdapter mForceInvisibleListener = new AnimatorListenerAdapter() {
         @Override
         public void onAnimationStart(Animator animation) {
@@ -241,6 +243,8 @@
         mDragLayerAlpha = mDragLayer.getAlphaProperty(ALPHA_INDEX_TRANSITIONS);
         mHandler = new Handler(Looper.getMainLooper());
         mDeviceProfile = mLauncher.getDeviceProfile();
+        mBackAnimationController = new LauncherBackAnimationController(
+                mDeviceProfile, mLauncher, this);
 
         Resources res = mLauncher.getResources();
         mContentScale = res.getFloat(R.dimen.content_scale);
@@ -1159,6 +1163,9 @@
             mLauncherOpenTransition.addHomeOpenCheck(mLauncher.getComponentName());
             SystemUiProxy.INSTANCE.getNoCreate().registerRemoteTransition(mLauncherOpenTransition);
         }
+        if (mBackAnimationController != null) {
+            mBackAnimationController.registerBackCallbacks(mHandler);
+        }
     }
 
     public void onActivityDestroyed() {
@@ -1194,6 +1201,10 @@
             mLauncherOpenTransition = null;
             mWallpaperOpenTransitionRunner = null;
         }
+        if (mBackAnimationController != null) {
+            mBackAnimationController.unregisterBackCallbacks();
+            mBackAnimationController = null;
+        }
     }
 
     private boolean launcherIsATargetWithMode(RemoteAnimationTargetCompat[] targets, int mode) {
@@ -1346,8 +1357,9 @@
     /**
      * Closing animator that animates the window into its final location on the workspace.
      */
-    private void getClosingWindowAnimators(AnimatorSet animation,
-            RemoteAnimationTargetCompat[] targets, View launcherView, PointF velocityPxPerS) {
+    private RectFSpringAnim getClosingWindowAnimators(AnimatorSet animation,
+            RemoteAnimationTargetCompat[] targets, View launcherView, PointF velocityPxPerS,
+            RectF closingWindowStartRect) {
         FloatingIconView floatingIconView = null;
         FloatingWidgetView floatingWidget = null;
         RectF targetRect = new RectF();
@@ -1379,8 +1391,7 @@
             targetRect.set(getDefaultWindowTargetRect());
         }
 
-        final RectF startRect = new RectF(0, 0, mDeviceProfile.widthPx, mDeviceProfile.heightPx);
-        RectFSpringAnim anim = new RectFSpringAnim(startRect, targetRect, mLauncher,
+        RectFSpringAnim anim = new RectFSpringAnim(closingWindowStartRect, targetRect, mLauncher,
                 mDeviceProfile);
 
         // Hook up floating views to the closing window animators.
@@ -1414,7 +1425,7 @@
 
             final float floatingWidgetAlpha = isTransluscent ? 0 : 1;
             FloatingWidgetView finalFloatingWidget = floatingWidget;
-            RectFSpringAnim.OnUpdateListener  runner = new SpringAnimRunner(targets, targetRect,
+            RectFSpringAnim.OnUpdateListener runner = new SpringAnimRunner(targets, targetRect,
                     windowTargetBounds) {
                 @Override
                 public void onUpdate(RectF currentRectF, float progress) {
@@ -1438,6 +1449,7 @@
                 anim.start(mLauncher, velocityPxPerS);
             }
         });
+        return anim;
     }
 
     /**
@@ -1562,6 +1574,97 @@
     }
 
     /**
+     * Creates the {@link RectFSpringAnim} and {@link AnimatorSet} required to animate
+     * the transition.
+     */
+    public Pair<RectFSpringAnim, AnimatorSet> createWallpaperOpenAnimations(
+            RemoteAnimationTargetCompat[] appTargets,
+            RemoteAnimationTargetCompat[] wallpaperTargets,
+            boolean fromUnlock,
+            RectF startRect) {
+        AnimatorSet anim = null;
+        RectFSpringAnim rectFSpringAnim = null;
+
+        RemoteAnimationProvider provider = mRemoteAnimationProvider;
+        if (provider != null) {
+            anim = provider.createWindowAnimation(appTargets, wallpaperTargets);
+        }
+
+        if (anim == null) {
+            anim = new AnimatorSet();
+
+            final boolean launcherIsForceInvisibleOrOpening = mLauncher.isForceInvisible()
+                    || launcherIsATargetWithMode(appTargets, MODE_OPENING);
+
+            View launcherView = findLauncherView(appTargets);
+            boolean playFallBackAnimation = (launcherView == null
+                    && launcherIsForceInvisibleOrOpening)
+                    || mLauncher.getWorkspace().isOverlayShown()
+                    || hasMultipleTargetsWithMode(appTargets, MODE_CLOSING);
+
+            boolean playWorkspaceReveal = true;
+            boolean skipAllAppsScale = false;
+            if (fromUnlock) {
+                anim.play(getUnlockWindowAnimator(appTargets, wallpaperTargets));
+            } else if (ENABLE_BACK_SWIPE_HOME_ANIMATION.get()
+                    && !playFallBackAnimation) {
+                // Use a fixed velocity to start the animation.
+                float velocityPxPerS = DynamicResource.provider(mLauncher)
+                        .getDimension(R.dimen.unlock_staggered_velocity_dp_per_s);
+                PointF velocity = new PointF(0, -velocityPxPerS);
+                rectFSpringAnim = getClosingWindowAnimators(
+                        anim, appTargets, launcherView, velocity, startRect);
+                if (!mLauncher.isInState(LauncherState.ALL_APPS)) {
+                    anim.play(new StaggeredWorkspaceAnim(mLauncher, velocity.y,
+                            true /* animateOverviewScrim */, launcherView).getAnimators());
+                    // We play StaggeredWorkspaceAnim as a part of the closing window animation.
+                    playWorkspaceReveal = false;
+                } else {
+                    // Skip scaling all apps, otherwise FloatingIconView will get wrong
+                    // layout bounds.
+                    skipAllAppsScale = true;
+                }
+            } else {
+                anim.play(getFallbackClosingWindowAnimators(appTargets));
+            }
+
+            // Normally, we run the launcher content animation when we are transitioning
+            // home, but if home is already visible, then we don't want to animate the
+            // contents of launcher unless we know that we are animating home as a result
+            // of the home button press with quickstep, which will result in launcher being
+            // started on touch down, prior to the animation home (and won't be in the
+            // targets list because it is already visible). In that case, we force
+            // invisibility on touch down, and only reset it after the animation to home
+            // is initialized.
+            if (launcherIsForceInvisibleOrOpening) {
+                addCujInstrumentation(
+                        anim, InteractionJankMonitorWrapper.CUJ_APP_CLOSE_TO_HOME);
+                // Only register the content animation for cancellation when state changes
+                mLauncher.getStateManager().setCurrentAnimation(anim);
+
+                if (mLauncher.isInState(LauncherState.ALL_APPS)) {
+                    Pair<AnimatorSet, Runnable> contentAnimator =
+                            getLauncherContentAnimator(false, LAUNCHER_RESUME_START_DELAY,
+                                    skipAllAppsScale);
+                    anim.play(contentAnimator.first);
+                    anim.addListener(new AnimatorListenerAdapter() {
+                        @Override
+                        public void onAnimationEnd(Animator animation) {
+                            contentAnimator.second.run();
+                        }
+                    });
+                } else {
+                    if (playWorkspaceReveal) {
+                        anim.play(new WorkspaceRevealAnim(mLauncher, false).getAnimators());
+                    }
+                }
+            }
+        }
+
+        return new Pair(rectFSpringAnim, anim);
+    }
+
+    /**
      * Remote animation runner for animation from the app to Launcher, including recents.
      */
     protected class WallpaperOpenLauncherAnimationRunner implements RemoteAnimationFactory {
@@ -1601,84 +1704,12 @@
                 mLauncher.getStateManager().moveToRestState();
             }
 
-            AnimatorSet anim = null;
-            RemoteAnimationProvider provider = mRemoteAnimationProvider;
-            if (provider != null) {
-                anim = provider.createWindowAnimation(appTargets, wallpaperTargets);
-            }
-
-            if (anim == null) {
-                anim = new AnimatorSet();
-
-                final boolean launcherIsForceInvisibleOrOpening = mLauncher.isForceInvisible()
-                        || launcherIsATargetWithMode(appTargets, MODE_OPENING);
-
-                View launcherView = findLauncherView(appTargets);
-                boolean playFallBackAnimation = (launcherView == null
-                        && launcherIsForceInvisibleOrOpening)
-                        || mLauncher.getWorkspace().isOverlayShown()
-                        || hasMultipleTargetsWithMode(appTargets, MODE_CLOSING);
-
-                boolean playWorkspaceReveal = true;
-                boolean skipAllAppsScale = false;
-                if (mFromUnlock) {
-                    anim.play(getUnlockWindowAnimator(appTargets, wallpaperTargets));
-                } else if (ENABLE_BACK_SWIPE_HOME_ANIMATION.get()
-                        && !playFallBackAnimation) {
-                    // Use a fixed velocity to start the animation.
-                    float velocityPxPerS = DynamicResource.provider(mLauncher)
-                            .getDimension(R.dimen.unlock_staggered_velocity_dp_per_s);
-                    PointF velocity = new PointF(0, -velocityPxPerS);
-                    getClosingWindowAnimators(anim, appTargets, launcherView, velocity);
-                    if (!mLauncher.isInState(LauncherState.ALL_APPS)) {
-                        anim.play(new StaggeredWorkspaceAnim(mLauncher, velocity.y,
-                                true /* animateOverviewScrim */, launcherView).getAnimators());
-                        // We play StaggeredWorkspaceAnim as a part of the closing window animation.
-                        playWorkspaceReveal = false;
-                    } else {
-                        // Skip scaling all apps, otherwise FloatingIconView will get wrong
-                        // layout bounds.
-                        skipAllAppsScale = true;
-                    }
-                } else {
-                    anim.play(getFallbackClosingWindowAnimators(appTargets));
-                }
-
-                // Normally, we run the launcher content animation when we are transitioning
-                // home, but if home is already visible, then we don't want to animate the
-                // contents of launcher unless we know that we are animating home as a result
-                // of the home button press with quickstep, which will result in launcher being
-                // started on touch down, prior to the animation home (and won't be in the
-                // targets list because it is already visible). In that case, we force
-                // invisibility on touch down, and only reset it after the animation to home
-                // is initialized.
-                if (launcherIsForceInvisibleOrOpening) {
-                    addCujInstrumentation(
-                            anim, InteractionJankMonitorWrapper.CUJ_APP_CLOSE_TO_HOME);
-                    // Only register the content animation for cancellation when state changes
-                    mLauncher.getStateManager().setCurrentAnimation(anim);
-
-                    if (mLauncher.isInState(LauncherState.ALL_APPS)) {
-                        Pair<AnimatorSet, Runnable> contentAnimator =
-                                getLauncherContentAnimator(false, LAUNCHER_RESUME_START_DELAY,
-                                        skipAllAppsScale);
-                        anim.play(contentAnimator.first);
-                        anim.addListener(new AnimatorListenerAdapter() {
-                            @Override
-                            public void onAnimationEnd(Animator animation) {
-                                contentAnimator.second.run();
-                            }
-                        });
-                    } else {
-                        if (playWorkspaceReveal) {
-                            anim.play(new WorkspaceRevealAnim(mLauncher, false).getAnimators());
-                        }
-                    }
-                }
-            }
+            Pair<RectFSpringAnim, AnimatorSet> pair = createWallpaperOpenAnimations(
+                    appTargets, wallpaperTargets, mFromUnlock,
+                    new RectF(0, 0, mDeviceProfile.widthPx, mDeviceProfile.heightPx));
 
             mLauncher.clearForceInvisibleFlag(INVISIBLE_ALL);
-            result.setAnimation(anim, mLauncher);
+            result.setAnimation(pair.second, mLauncher);
         }
     }
 
diff --git a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
index 768a348..793d987 100644
--- a/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/LauncherTaskbarUIController.java
@@ -27,6 +27,7 @@
 import android.view.WindowManagerGlobal;
 
 import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
 
 import com.android.launcher3.BaseQuickstepLauncher;
 import com.android.launcher3.DeviceProfile;
@@ -118,6 +119,24 @@
     }
 
     /**
+     * Enables manual taskbar stashing. This method should only be used for tests that need to
+     * stash/unstash the taskbar.
+     */
+    @VisibleForTesting
+    public void enableManualStashingForTests(boolean enableManualStashing) {
+        mControllers.taskbarStashController.enableManualStashingForTests(enableManualStashing);
+    }
+
+    /**
+     * Unstashes the Taskbar if it is stashed. This method should only be used to unstash the
+     * taskbar at the end of a test.
+     */
+    @VisibleForTesting
+    public void unstashTaskbarIfStashed() {
+        mControllers.taskbarStashController.onLongPressToUnstashTaskbar();
+    }
+
+    /**
      * Should be called from onResume() and onPause(), and animates the Taskbar accordingly.
      */
     public void onLauncherResumedOrPaused(boolean isResumed) {
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 5387b1a..6c74ae3 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -71,6 +71,8 @@
 import com.android.launcher3.model.data.WorkspaceItemInfo;
 import com.android.launcher3.popup.PopupDataProvider;
 import com.android.launcher3.taskbar.allapps.TaskbarAllAppsController;
+import com.android.launcher3.testing.TestLogging;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.touch.ItemClickHandler;
 import com.android.launcher3.util.DisplayController;
 import com.android.launcher3.util.DisplayController.NavigationMode;
@@ -646,12 +648,16 @@
                         Toast.makeText(this, R.string.safemode_shortcut_error,
                                 Toast.LENGTH_SHORT).show();
                     } else  if (info.isPromise()) {
+                        TestLogging.recordEvent(
+                                TestProtocol.SEQUENCE_MAIN, "start: taskbarPromiseIcon");
                         intent = new PackageManagerHelper(this)
                                 .getMarketIntent(info.getTargetPackage())
                                 .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                         startActivity(intent);
 
                     } else if (info.itemType == Favorites.ITEM_TYPE_DEEP_SHORTCUT) {
+                        TestLogging.recordEvent(
+                                TestProtocol.SEQUENCE_MAIN, "start: taskbarDeepShortcut");
                         String id = info.getDeepShortcutId();
                         String packageName = intent.getPackage();
                         getSystemService(LauncherApps.class)
@@ -680,6 +686,7 @@
         Intent intent = new Intent(info.getIntent())
                 .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         try {
+            TestLogging.recordEvent(TestProtocol.SEQUENCE_MAIN, "start: taskbarAppIcon");
             if (info.user.equals(Process.myUserHandle())) {
                 // TODO(b/216683257): Use startActivityForResult for search results that require it.
                 startActivity(intent);
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
index af98b7f..e2ab443 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarDragController.java
@@ -63,6 +63,8 @@
 import com.android.launcher3.popup.PopupContainerWithArrow;
 import com.android.launcher3.shortcuts.DeepShortcutView;
 import com.android.launcher3.shortcuts.ShortcutDragPreviewProvider;
+import com.android.launcher3.testing.TestLogging;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.IntSet;
 import com.android.launcher3.util.ItemInfoMatcher;
 import com.android.systemui.shared.recents.model.Task;
@@ -128,7 +130,7 @@
         if (!(view instanceof BubbleTextView)) {
             return false;
         }
-
+        TestLogging.recordEvent(TestProtocol.SEQUENCE_MAIN, "onTaskbarItemLongClick");
         BubbleTextView btv = (BubbleTextView) view;
         mActivity.onDragStart();
         btv.post(() -> {
@@ -164,24 +166,7 @@
         dragLayerY += dragRect.top;
 
         DragOptions dragOptions = new DragOptions();
-        dragOptions.preDragCondition = new DragOptions.PreDragCondition() {
-            private DragView mDragView;
-
-            @Override
-            public boolean shouldStartDrag(double distanceDragged) {
-                return mDragView != null && mDragView.isAnimationFinished();
-            }
-
-            @Override
-            public void onPreDragStart(DropTarget.DragObject dragObject) {
-                mDragView = dragObject.dragView;
-            }
-
-            @Override
-            public void onPreDragEnd(DropTarget.DragObject dragObject, boolean dragStarted) {
-                mDragView = null;
-            }
-        };
+        dragOptions.preDragCondition = null;
         if (FeatureFlags.ENABLE_TASKBAR_POPUP_MENU.get()) {
             PopupContainerWithArrow<BaseTaskbarContext> popupContainer =
                     mControllers.taskbarPopupController.showForIcon(btv);
@@ -189,6 +174,32 @@
                 dragOptions.preDragCondition = popupContainer.createPreDragCondition(false);
             }
         }
+        if (dragOptions.preDragCondition == null) {
+            dragOptions.preDragCondition = new DragOptions.PreDragCondition() {
+                private DragView mDragView;
+
+                @Override
+                public boolean shouldStartDrag(double distanceDragged) {
+                    return mDragView != null && mDragView.isAnimationFinished();
+                }
+
+                @Override
+                public void onPreDragStart(DropTarget.DragObject dragObject) {
+                    mDragView = dragObject.dragView;
+
+                    if (FeatureFlags.ENABLE_TASKBAR_POPUP_MENU.get()
+                            && !shouldStartDrag(0)) {
+                        // Immediately close the popup menu.
+                        mDragView.setOnAnimationEndCallback(() -> callOnDragStart());
+                    }
+                }
+
+                @Override
+                public void onPreDragEnd(DropTarget.DragObject dragObject, boolean dragStarted) {
+                    mDragView = null;
+                }
+            };
+        }
 
         return startDrag(
                 drawable,
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarPopupController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarPopupController.java
index ea4fe34..f9c8062 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarPopupController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarPopupController.java
@@ -145,6 +145,7 @@
                 });
         // TODO (b/198438631): configure for taskbar/context
         container.setPopupItemDragHandler(new TaskbarPopupItemDragHandler());
+        mControllers.taskbarDragController.addDragListener(container);
 
         container.populateAndShow(icon,
                 mPopupDataProvider.getShortcutCountForItem(item),
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
index 473be9e..f9a282b 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java
@@ -136,6 +136,8 @@
     private boolean mIsSystemGestureInProgress;
     private boolean mIsImeShowing;
 
+    private boolean mEnableManualStashingForTests = false;
+
     // Evaluate whether the handle should be stashed
     private final StatePropertyHolder mStatePropertyHolder = new StatePropertyHolder(
             flags -> {
@@ -199,12 +201,15 @@
      */
     protected boolean supportsManualStashing() {
         return supportsVisualStashing()
-                && (!Utilities.IS_RUNNING_IN_TEST_HARNESS || supportsStashingForTests());
+                && (!Utilities.IS_RUNNING_IN_TEST_HARNESS || mEnableManualStashingForTests);
     }
 
-    private boolean supportsStashingForTests() {
-        // TODO: enable this for tests that specifically check stash/unstash behavior.
-        return false;
+    /**
+     * Enables support for manual stashing. This should only be used to add this functionality
+     * to Launcher specific tests.
+     */
+    public void enableManualStashingForTests(boolean enableManualStashing) {
+        mEnableManualStashingForTests = enableManualStashing;
     }
 
     /**
diff --git a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsContext.java b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsContext.java
index 23da499..22fffdf 100644
--- a/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsContext.java
@@ -24,6 +24,7 @@
 import android.content.Context;
 import android.graphics.Insets;
 import android.view.KeyEvent;
+import android.view.MotionEvent;
 import android.view.View;
 import android.view.WindowInsets;
 
@@ -38,6 +39,8 @@
 import com.android.launcher3.taskbar.TaskbarActivityContext;
 import com.android.launcher3.taskbar.TaskbarDragController;
 import com.android.launcher3.taskbar.TaskbarStashController;
+import com.android.launcher3.testing.TestLogging;
+import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.util.OnboardingPrefs;
 import com.android.launcher3.util.TouchController;
 import com.android.launcher3.views.BaseDragLayer;
@@ -180,6 +183,12 @@
         }
 
         @Override
+        public boolean dispatchTouchEvent(MotionEvent ev) {
+            TestLogging.recordMotionEvent(TestProtocol.SEQUENCE_MAIN, "Touch event", ev);
+            return super.dispatchTouchEvent(ev);
+        }
+
+        @Override
         public boolean dispatchKeyEvent(KeyEvent event) {
             if (event.getAction() == ACTION_UP && event.getKeyCode() == KEYCODE_BACK) {
                 AbstractFloatingView topView = AbstractFloatingView.getTopOpenView(mActivity);
diff --git a/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java b/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java
new file mode 100644
index 0000000..7abcbdb
--- /dev/null
+++ b/quickstep/src/com/android/quickstep/LauncherBackAnimationController.java
@@ -0,0 +1,308 @@
+/*
+ * 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.quickstep;
+
+import static com.android.launcher3.BaseActivity.INVISIBLE_ALL;
+import static com.android.launcher3.BaseActivity.INVISIBLE_BY_PENDING_FLAGS;
+import static com.android.launcher3.BaseActivity.PENDING_INVISIBLE_BY_WALLPAPER_ANIMATION;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.AnimatorSet;
+import android.animation.ValueAnimator;
+import android.graphics.Matrix;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.os.Handler;
+import android.util.Log;
+import android.util.MathUtils;
+import android.util.Pair;
+import android.view.RemoteAnimationTarget;
+import android.view.SurfaceControl;
+import android.window.BackEvent;
+import android.window.IOnBackInvokedCallback;
+
+import com.android.launcher3.BaseQuickstepLauncher;
+import com.android.launcher3.DeviceProfile;
+import com.android.launcher3.QuickstepTransitionManager;
+import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
+import com.android.quickstep.util.RectFSpringAnim;
+import com.android.systemui.shared.system.QuickStepContract;
+import com.android.systemui.shared.system.RemoteAnimationTargetCompat;
+import com.android.systemui.shared.system.SyncRtSurfaceTransactionApplierCompat;
+/**
+ * Controls the animation of swiping back and returning to launcher.
+ *
+ * This is a two part animation. The first part is an animation that tracks gesture location to
+ * scale and move the leaving app window. Once the gesture is committed, the second part takes over
+ * the app window and plays the rest of app close transitions in one go.
+ *
+ * This animation is used only for apps that enable back dispatching via
+ * {@link android.view.OnBackInvokedDispatcher}. The controller registers
+ * an {@link IOnBackInvokedCallback} with WM Shell and receives back dispatches when a back
+ * navigation to launcher starts.
+ *
+ * Apps using the legacy back dispatching will keep triggering the WALLPAPER_OPEN remote
+ * transition registered in {@link QuickstepTransitionManager}.
+ *
+ */
+public class LauncherBackAnimationController {
+    private static final int CANCEL_TRANSITION_DURATION = 150;
+    private static final String TAG = "LauncherBackAnimationController";
+    private final DeviceProfile mDeviceProfile;
+    private final QuickstepTransitionManager mQuickstepTransitionManager;
+    private final Matrix mTransformMatrix = new Matrix();
+    private final RectF mTargetRectF = new RectF();
+    private final RectF mStartRectF = new RectF();
+    private final RectF mCurrentRect = new RectF();
+    private final BaseQuickstepLauncher mLauncher;
+    private final int mWindowScaleMarginX;
+    private final int mWindowScaleMarginY;
+    private final float mWindowScaleEndCornerRadius;
+    private final float mWindowScaleStartCornerRadius;
+
+    private RemoteAnimationTargetCompat mBackTarget;
+    private SurfaceControl.Transaction mTransaction = new SurfaceControl.Transaction();
+    private boolean mSpringAnimationInProgress = false;
+    private boolean mAnimatorSetInProgress = false;
+    @BackEvent.SwipeEdge
+    private int mSwipeEdge;
+    private float mBackProgress = 0;
+    private boolean mBackInProgress = false;
+
+    public LauncherBackAnimationController(
+            DeviceProfile deviceProfile,
+            BaseQuickstepLauncher launcher,
+            QuickstepTransitionManager quickstepTransitionManager) {
+        mDeviceProfile = deviceProfile;
+        mLauncher = launcher;
+        mQuickstepTransitionManager = quickstepTransitionManager;
+        mWindowScaleEndCornerRadius = QuickStepContract.supportsRoundedCornersOnWindows(
+                mLauncher.getResources())
+                ? mLauncher.getResources().getDimensionPixelSize(
+                        R.dimen.swipe_back_window_corner_radius)
+                : 0;
+        mWindowScaleStartCornerRadius = QuickStepContract.getWindowCornerRadius(mLauncher);
+        mWindowScaleMarginX = mLauncher.getResources().getDimensionPixelSize(
+                R.dimen.swipe_back_window_scale_x_margin);
+        mWindowScaleMarginY = mLauncher.getResources().getDimensionPixelSize(
+                R.dimen.swipe_back_window_scale_y_margin);
+    }
+
+    /**
+     * Registers {@link IOnBackInvokedCallback} to receive back dispatches from shell.
+     * @param handler Handler to the thread to run the animations on.
+     */
+    public void registerBackCallbacks(Handler handler) {
+        SystemUiProxy systemUiProxy = SystemUiProxy.INSTANCE.getNoCreate();
+        if (systemUiProxy == null) {
+            Log.e(TAG, "SystemUiProxy is null. Skip registering back invocation callbacks");
+            return;
+        }
+        systemUiProxy.setBackToLauncherCallback(
+                new IOnBackInvokedCallback.Stub() {
+                    @Override
+                    public void onBackCancelled() {
+                        handler.post(() -> resetPositionAnimated());
+                    }
+
+                    @Override
+                    public void onBackInvoked() {
+                        handler.post(() -> startTransition());
+                    }
+
+                    @Override
+                    public void onBackProgressed(BackEvent backEvent) {
+                        mBackProgress = backEvent.getProgress();
+                        // TODO: Update once the interpolation curve spec is finalized.
+                        mBackProgress =
+                                1 - (1 - mBackProgress) * (1 - mBackProgress) * (1
+                                        - mBackProgress);
+                        if (!mBackInProgress) {
+                            startBack(backEvent);
+                        } else {
+                            updateBackProgress(mBackProgress);
+                        }
+                    }
+
+                    public void onBackStarted() { }
+                });
+    }
+
+    private void resetPositionAnimated() {
+        ValueAnimator cancelAnimator = ValueAnimator.ofFloat(mBackProgress, 0);
+        cancelAnimator.setDuration(CANCEL_TRANSITION_DURATION);
+        cancelAnimator.addUpdateListener(
+                animation -> {
+                    updateBackProgress((float) animation.getAnimatedValue());
+                });
+        cancelAnimator.addListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationEnd(Animator animation) {
+                finishAnimation();
+            }
+        });
+        cancelAnimator.start();
+    }
+
+    /** Unregisters the back to launcher callback in shell. */
+    public void unregisterBackCallbacks() {
+        SystemUiProxy systemUiProxy = SystemUiProxy.INSTANCE.getNoCreate();
+        if (systemUiProxy != null) {
+            systemUiProxy.clearBackToLauncherCallback();
+        }
+    }
+
+    private void startBack(BackEvent backEvent) {
+        mBackInProgress = true;
+        RemoteAnimationTarget appTarget = backEvent.getDepartingAnimationTarget();
+
+        if (appTarget == null) {
+            return;
+        }
+
+        mTransaction.show(appTarget.leash).apply();
+        mTransaction.setAnimationTransaction();
+        mBackTarget = new RemoteAnimationTargetCompat(appTarget);
+        mSwipeEdge = backEvent.getSwipeEdge();
+        float screenWidth = mDeviceProfile.widthPx;
+        float screenHeight = mDeviceProfile.heightPx;
+        float targetHeight = screenHeight - 2 * mWindowScaleMarginY;
+        float targetWidth = targetHeight * screenWidth / screenHeight;
+        float left;
+        if (mSwipeEdge == BackEvent.EDGE_LEFT) {
+            left = screenWidth - targetWidth - mWindowScaleMarginX;
+        } else {
+            left = mWindowScaleMarginX;
+        }
+        float top = mWindowScaleMarginY;
+        // TODO(b/218916755): Offset start rectangle in multiwindow mode.
+        mStartRectF.set(0, 0, screenWidth, screenHeight);
+        mTargetRectF.set(left, top, targetWidth + left, targetHeight + top);
+    }
+
+    private void updateBackProgress(float progress) {
+        if (mBackTarget == null) {
+            return;
+        }
+
+        mCurrentRect.set(
+                MathUtils.lerp(mStartRectF.left, mTargetRectF.left, progress),
+                MathUtils.lerp(mStartRectF.top, mTargetRectF.top, progress),
+                MathUtils.lerp(mStartRectF.right, mTargetRectF.right, progress),
+                MathUtils.lerp(mStartRectF.bottom, mTargetRectF.bottom, progress));
+        SyncRtSurfaceTransactionApplierCompat.SurfaceParams.Builder builder =
+                new SyncRtSurfaceTransactionApplierCompat.SurfaceParams.Builder(mBackTarget.leash);
+
+        Rect currentRect = new Rect();
+        mCurrentRect.round(currentRect);
+
+        // Scale the target window to match the currentRectF.
+        final float scale = mCurrentRect.width() / mStartRectF.width();
+        mTransformMatrix.reset();
+        mTransformMatrix.setScale(scale, scale);
+        mTransformMatrix.postTranslate(mCurrentRect.left, mCurrentRect.top);
+        Rect startRect = new Rect();
+        mStartRectF.round(startRect);
+        float cornerRadius = Utilities.mapRange(
+                progress, mWindowScaleStartCornerRadius, mWindowScaleEndCornerRadius);
+        builder.withMatrix(mTransformMatrix)
+                .withWindowCrop(startRect)
+                .withCornerRadius(cornerRadius);
+        SyncRtSurfaceTransactionApplierCompat.SurfaceParams surfaceParams = builder.build();
+
+        if (surfaceParams.surface.isValid()) {
+            surfaceParams.applyTo(mTransaction);
+        }
+        mTransaction.apply();
+    }
+
+    private void startTransition() {
+        if (mBackTarget == null) {
+            // Trigger transition system instead of custom transition animation.
+            finishAnimation();
+            return;
+        }
+        if (mLauncher.isDestroyed()) {
+            return;
+        }
+        // TODO: Catch the moment when launcher becomes visible after the top app un-occludes
+        //  launcher and start animating afterwards. Currently we occasionally get a flicker from
+        //  animating when launcher is still invisible.
+        if (mLauncher.hasSomeInvisibleFlag(PENDING_INVISIBLE_BY_WALLPAPER_ANIMATION)) {
+            mLauncher.addForceInvisibleFlag(INVISIBLE_BY_PENDING_FLAGS);
+            mLauncher.getStateManager().moveToRestState();
+        }
+
+        Pair<RectFSpringAnim, AnimatorSet> pair =
+                mQuickstepTransitionManager.createWallpaperOpenAnimations(
+                    new RemoteAnimationTargetCompat[]{mBackTarget},
+                    new RemoteAnimationTargetCompat[]{},
+                    false /* fromUnlock */,
+                    mCurrentRect);
+        startTransitionAnimations(pair.first, pair.second);
+        mLauncher.clearForceInvisibleFlag(INVISIBLE_ALL);
+    }
+
+    private void finishAnimation() {
+        mBackTarget = null;
+        mBackInProgress = false;
+        mBackProgress = 0;
+        mSwipeEdge = BackEvent.EDGE_LEFT;
+        mTransformMatrix.reset();
+        mTargetRectF.setEmpty();
+        mCurrentRect.setEmpty();
+        mStartRectF.setEmpty();
+        mAnimatorSetInProgress = false;
+        mSpringAnimationInProgress = false;
+        SystemUiProxy systemUiProxy = SystemUiProxy.INSTANCE.getNoCreate();
+        if (systemUiProxy != null) {
+            SystemUiProxy.INSTANCE.getNoCreate().onBackToLauncherAnimationFinished();
+        }
+    }
+
+    private void startTransitionAnimations(RectFSpringAnim springAnim, AnimatorSet anim) {
+        mAnimatorSetInProgress = anim != null;
+        mSpringAnimationInProgress = springAnim != null;
+        if (springAnim != null) {
+            springAnim.addAnimatorListener(
+                    new AnimatorListenerAdapter() {
+                        @Override
+                        public void onAnimationEnd(Animator animation) {
+                            mSpringAnimationInProgress = false;
+                            tryFinishBackAnimation();
+                        }
+                    }
+            );
+        }
+        anim.addListener(new AnimatorListenerAdapter() {
+            @Override
+            public void onAnimationEnd(Animator animation) {
+                mAnimatorSetInProgress = false;
+                tryFinishBackAnimation();
+            }
+        });
+        anim.start();
+    }
+
+    private void tryFinishBackAnimation() {
+        if (!mSpringAnimationInProgress && !mAnimatorSetInProgress) {
+            finishAnimation();
+        }
+    }
+}
diff --git a/quickstep/src/com/android/quickstep/SystemUiProxy.java b/quickstep/src/com/android/quickstep/SystemUiProxy.java
index 667ea14..d8cbd36 100644
--- a/quickstep/src/com/android/quickstep/SystemUiProxy.java
+++ b/quickstep/src/com/android/quickstep/SystemUiProxy.java
@@ -39,6 +39,7 @@
 import android.view.RemoteAnimationAdapter;
 import android.view.RemoteAnimationTarget;
 import android.view.SurfaceControl;
+import android.window.IOnBackInvokedCallback;
 
 import com.android.launcher3.util.DisplayController;
 import com.android.launcher3.util.DisplayController.Info;
@@ -50,6 +51,7 @@
 import com.android.systemui.shared.system.smartspace.ILauncherUnlockAnimationController;
 import com.android.systemui.shared.system.smartspace.ISysuiUnlockAnimationController;
 import com.android.systemui.shared.system.smartspace.SmartspaceState;
+import com.android.wm.shell.back.IBackAnimation;
 import com.android.wm.shell.onehanded.IOneHanded;
 import com.android.wm.shell.pip.IPip;
 import com.android.wm.shell.pip.IPipAnimationListener;
@@ -82,6 +84,7 @@
     private IShellTransitions mShellTransitions;
     private IStartingWindow mStartingWindow;
     private IRecentTasks mRecentTasks;
+    private IBackAnimation mBackAnimation;
     private final DeathRecipient mSystemUiProxyDeathRecipient = () -> {
         MAIN_EXECUTOR.execute(() -> clearProxy());
     };
@@ -96,6 +99,7 @@
     private ILauncherUnlockAnimationController mPendingLauncherUnlockAnimationController;
     private IRecentTasksListener mRecentTasksListener;
     private final ArrayList<RemoteTransitionCompat> mRemoteTransitions = new ArrayList<>();
+    private IOnBackInvokedCallback mBackToLaunchCallback;
 
     // Used to dedupe calls to SystemUI
     private int mLastShelfHeight;
@@ -162,8 +166,8 @@
     public void setProxy(ISystemUiProxy proxy, IPip pip, ISplitScreen splitScreen,
             IOneHanded oneHanded, IShellTransitions shellTransitions,
             IStartingWindow startingWindow, IRecentTasks recentTasks,
-            ISysuiUnlockAnimationController sysuiUnlockAnimationController) {
-
+            ISysuiUnlockAnimationController sysuiUnlockAnimationController,
+            IBackAnimation backAnimation) {
         unlinkToDeath();
         mSystemUiProxy = proxy;
         mPip = pip;
@@ -173,6 +177,7 @@
         mStartingWindow = startingWindow;
         mSysuiUnlockAnimationController = sysuiUnlockAnimationController;
         mRecentTasks = recentTasks;
+        mBackAnimation = backAnimation;
         linkToDeath();
         // re-attach the listeners once missing due to setProxy has not been initialized yet.
         if (mPipAnimationListener != null && mPip != null) {
@@ -195,6 +200,9 @@
         if (mRecentTasksListener != null && mRecentTasks != null) {
             registerRecentTasksListener(mRecentTasksListener);
         }
+        if (mBackAnimation != null && mBackToLaunchCallback != null) {
+            setBackToLauncherCallback(mBackToLaunchCallback);
+        }
 
         if (mPendingSetNavButtonAlpha != null) {
             mPendingSetNavButtonAlpha.run();
@@ -203,7 +211,7 @@
     }
 
     public void clearProxy() {
-        setProxy(null, null, null, null, null, null, null, null);
+        setProxy(null, null, null, null, null, null, null, null, null);
     }
 
     // TODO(141886704): Find a way to remove this
@@ -822,6 +830,49 @@
         mRecentTasksListener = null;
     }
 
+    //
+    // Back navigation transitions
+    //
+
+    /** Sets the launcher {@link android.window.IOnBackInvokedCallback} to shell */
+    public void setBackToLauncherCallback(IOnBackInvokedCallback callback) {
+        mBackToLaunchCallback = callback;
+        if (mBackAnimation == null) {
+            return;
+        }
+        try {
+            mBackAnimation.setBackToLauncherCallback(callback);
+        } catch (RemoteException e) {
+            Log.e(TAG, "Failed call setBackToLauncherCallback", e);
+        }
+    }
+
+    /** Clears the previously registered {@link IOnBackInvokedCallback}. */
+    public void clearBackToLauncherCallback() {
+        if (mBackAnimation == null) {
+            return;
+        }
+        try {
+            mBackAnimation.clearBackToLauncherCallback();
+        } catch (RemoteException e) {
+            Log.e(TAG, "Failed call clearBackToLauncherCallback", e);
+        }
+    }
+
+    /**
+     * Notifies shell that all back to launcher animations have finished (including the transition
+     * that plays after the gesture is committed and before the app is closed.
+     */
+    public void onBackToLauncherAnimationFinished() {
+        if (mBackAnimation != null) {
+            try {
+                mBackAnimation.onBackToLauncherAnimationFinished();
+            } catch (RemoteException e) {
+                Log.w(TAG, "Failed call onBackAnimationFinished", e);
+            }
+        }
+    }
+
     public ArrayList<GroupedRecentTaskInfo> getRecentTasks(int numTasks, int userId) {
         if (mRecentTasks != null) {
             try {
diff --git a/quickstep/src/com/android/quickstep/TouchInteractionService.java b/quickstep/src/com/android/quickstep/TouchInteractionService.java
index 021048a..ff67b09 100644
--- a/quickstep/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/src/com/android/quickstep/TouchInteractionService.java
@@ -26,6 +26,7 @@
 import static com.android.quickstep.GestureState.DEFAULT_STATE;
 import static com.android.systemui.shared.system.ActivityManagerWrapper.CLOSE_SYSTEM_WINDOWS_REASON_RECENTS;
 import static com.android.systemui.shared.system.QuickStepContract.KEY_EXTRA_RECENT_TASKS;
+import static com.android.systemui.shared.system.QuickStepContract.KEY_EXTRA_SHELL_BACK_ANIMATION;
 import static com.android.systemui.shared.system.QuickStepContract.KEY_EXTRA_SHELL_ONE_HANDED;
 import static com.android.systemui.shared.system.QuickStepContract.KEY_EXTRA_SHELL_PIP;
 import static com.android.systemui.shared.system.QuickStepContract.KEY_EXTRA_SHELL_SHELL_TRANSITIONS;
@@ -106,6 +107,7 @@
 import com.android.systemui.shared.system.InputMonitorCompat;
 import com.android.systemui.shared.system.smartspace.ISysuiUnlockAnimationController;
 import com.android.systemui.shared.tracing.ProtoTraceable;
+import com.android.wm.shell.back.IBackAnimation;
 import com.android.wm.shell.onehanded.IOneHanded;
 import com.android.wm.shell.pip.IPip;
 import com.android.wm.shell.recents.IRecentTasks;
@@ -166,10 +168,12 @@
                             bundle.getBinder(KEY_EXTRA_UNLOCK_ANIMATION_CONTROLLER));
             IRecentTasks recentTasks = IRecentTasks.Stub.asInterface(
                     bundle.getBinder(KEY_EXTRA_RECENT_TASKS));
+            IBackAnimation backAnimation = IBackAnimation.Stub.asInterface(
+                    bundle.getBinder(KEY_EXTRA_SHELL_BACK_ANIMATION));
             MAIN_EXECUTOR.execute(() -> {
                 SystemUiProxy.INSTANCE.get(TouchInteractionService.this).setProxy(proxy, pip,
                         splitscreen, onehanded, shellTransitions, startingWindow, recentTasks,
-                        launcherUnlockAnimationController);
+                        launcherUnlockAnimationController, backAnimation);
                 TouchInteractionService.this.initInputMonitor();
                 preloadOverview(true /* fromInit */);
             });
diff --git a/quickstep/tests/src/com/android/quickstep/TaplTestsTaskbar.java b/quickstep/tests/src/com/android/quickstep/TaplTestsTaskbar.java
new file mode 100644
index 0000000..ba93975
--- /dev/null
+++ b/quickstep/tests/src/com/android/quickstep/TaplTestsTaskbar.java
@@ -0,0 +1,155 @@
+/*
+ * 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.quickstep;
+
+import static androidx.test.InstrumentationRegistry.getInstrumentation;
+
+import static junit.framework.TestCase.assertEquals;
+
+import android.content.Intent;
+
+import androidx.test.filters.LargeTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import com.android.launcher3.tapl.Taskbar;
+import com.android.launcher3.ui.TaplTestsLauncher3;
+
+import org.junit.After;
+import org.junit.Assume;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.List;
+
+@LargeTest
+@RunWith(AndroidJUnit4.class)
+public class TaplTestsTaskbar extends AbstractQuickStepTest {
+
+    private static final String TEST_APP_NAME = "LauncherTestApp";
+    private static final String TEST_APP_PACKAGE =
+            getInstrumentation().getContext().getPackageName();
+    private static final String CALCULATOR_APP_PACKAGE =
+            resolveSystemApp(Intent.CATEGORY_APP_CALCULATOR);
+
+    @Override
+    public void setUp() throws Exception {
+        Assume.assumeTrue(mLauncher.isTablet());
+        super.setUp();
+        mLauncher.useTestWorkspaceLayoutOnReload();
+        TaplTestsLauncher3.initialize(this);
+
+        startAppFast(CALCULATOR_APP_PACKAGE);
+        mLauncher.showTaskbarIfHidden();
+    }
+
+    @After
+    public void tearDown() {
+        mLauncher.useDefaultWorkspaceLayoutOnReload();
+    }
+
+    @Test
+    public void testHideShowTaskbar() {
+        getTaskbar().hide();
+        mLauncher.getLaunchedAppState().showTaskbar();
+    }
+
+    @Test
+    public void testLaunchApp() throws Exception {
+        getTaskbar().getAppIcon(TEST_APP_NAME).launch(TEST_APP_PACKAGE);
+    }
+
+    @Test
+    public void testOpenMenu() throws Exception {
+        getTaskbar().getAppIcon(TEST_APP_NAME).openMenu();
+    }
+
+    @Test
+    public void testLaunchShortcut() throws Exception {
+        getTaskbar().getAppIcon(TEST_APP_NAME)
+                .openDeepShortcutMenu()
+                .getMenuItem("Shortcut 1")
+                .launch(TEST_APP_PACKAGE);
+    }
+
+    @Test
+    @PortraitLandscape
+    public void testLaunchAppInSplitscreen() throws Exception {
+        getTaskbar().getAppIcon(TEST_APP_NAME).dragToSplitscreen(
+                TEST_APP_PACKAGE, CALCULATOR_APP_PACKAGE);
+    }
+
+    @Test
+    @PortraitLandscape
+    public void testLaunchShortcutInSplitscreen() throws Exception {
+        getTaskbar().getAppIcon(TEST_APP_NAME)
+                .openDeepShortcutMenu()
+                .getMenuItem("Shortcut 1")
+                .dragToSplitscreen(TEST_APP_PACKAGE, CALCULATOR_APP_PACKAGE);
+    }
+
+    @Test
+    public void testLaunchApp_FromTaskbarAllApps() throws Exception {
+        getTaskbar().openAllApps().getAppIcon(TEST_APP_NAME).launch(TEST_APP_PACKAGE);
+    }
+
+    @Test
+    public void testOpenMenu_FromTaskbarAllApps() throws Exception {
+        getTaskbar().openAllApps().getAppIcon(TEST_APP_NAME).openMenu();
+    }
+
+    @Test
+    public void testLaunchShortcut_FromTaskbarAllApps() throws Exception {
+        getTaskbar().openAllApps()
+                .getAppIcon(TEST_APP_NAME)
+                .openDeepShortcutMenu()
+                .getMenuItem("Shortcut 1")
+                .launch(TEST_APP_PACKAGE);
+    }
+
+    @Test
+    @PortraitLandscape
+    public void testLaunchAppInSplitscreen_FromTaskbarAllApps() throws Exception {
+        getTaskbar().openAllApps()
+                .getAppIcon(TEST_APP_NAME)
+                .dragToSplitscreen(TEST_APP_PACKAGE, CALCULATOR_APP_PACKAGE);
+    }
+
+    @Test
+    @PortraitLandscape
+    public void testLaunchShortcutInSplitscreen_FromTaskbarAllApps() throws Exception {
+        getTaskbar().openAllApps()
+                .getAppIcon(TEST_APP_NAME)
+                .openDeepShortcutMenu()
+                .getMenuItem("Shortcut 1")
+                .dragToSplitscreen(TEST_APP_PACKAGE, CALCULATOR_APP_PACKAGE);
+    }
+
+    private Taskbar getTaskbar() {
+        Taskbar taskbar = mLauncher.getLaunchedAppState().getTaskbar();
+        List<String> taskbarIconNames = taskbar.getIconNames();
+        List<String> hotseatIconNames = mLauncher.getHotseatIconNames();
+
+        assertEquals("Taskbar and hotseat icon counts do not match",
+                taskbarIconNames.size(), hotseatIconNames.size());
+
+        for (int i = 0; i < taskbarIconNames.size(); i++) {
+            assertEquals("Taskbar and Hotseat icons do not match",
+                    taskbarIconNames, hotseatIconNames);
+        }
+
+        return taskbar;
+    }
+}
diff --git a/res/values/config.xml b/res/values/config.xml
index 509f363..e2fd0e3 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -166,4 +166,8 @@
     <!-- Name of the class used to generate colors from the wallpaper colors. Must be implementing the LauncherAppWidgetHostView.ColorGenerator interface. -->
     <string name="color_generator_class" translatable="false"/>
 
+    <!-- Swipe back to home related -->
+    <dimen name="swipe_back_window_scale_x_margin">10dp</dimen>
+    <dimen name="swipe_back_window_scale_y_margin">80dp</dimen>
+    <dimen name="swipe_back_window_corner_radius">40dp</dimen>
 </resources>
diff --git a/res/xml/default_test_workspace.xml b/res/xml/default_test_workspace.xml
new file mode 100644
index 0000000..bd718b3
--- /dev/null
+++ b/res/xml/default_test_workspace.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+-->
+
+<!-- Split display specific version of Launcher3/res/xml/default_workspace_4x4.xml -->
+<favorites xmlns:launcher="http://schemas.android.com/apk/res-auto/com.android.launcher3" >
+
+    <!-- Launcher Test Activity -->
+    <resolve
+        launcher:container="-101"
+        launcher:screen="0"
+        launcher:x="0"
+        launcher:y="0" >
+        <favorite launcher:uri="#Intent;action=android.intent.action.MAIN;category=android.intent.category.CATEGORY_TEST;component=com.google.android.apps.nexuslauncher.tests/com.android.launcher3.testcomponent.BaseTestingActivity;end" />
+    </resolve>
+
+</favorites>
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index e004a4b..85ee8bc 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -102,6 +102,8 @@
     public static final String AUTHORITY = BuildConfig.APPLICATION_ID + ".settings";
     public static final String KEY_LAYOUT_PROVIDER_AUTHORITY = "KEY_LAYOUT_PROVIDER_AUTHORITY";
 
+    private static final int TEST_WORKSPACE_LAYOUT_RES_XML = R.xml.default_test_workspace;
+
     static final String EMPTY_DATABASE_CREATED = "EMPTY_DATABASE_CREATED";
 
     protected DatabaseHelper mOpenHelper;
@@ -109,6 +111,8 @@
 
     private long mLastRestoreTimestamp = 0L;
 
+    private boolean mUseTestWorkspaceLayout;
+
     /**
      * $ adb shell dumpsys activity provider com.android.launcher3
      */
@@ -390,6 +394,14 @@
                 mOpenHelper.createEmptyDB(mOpenHelper.getWritableDatabase());
                 return null;
             }
+            case LauncherSettings.Settings.METHOD_SET_USE_TEST_WORKSPACE_LAYOUT_FLAG: {
+                mUseTestWorkspaceLayout = true;
+                return null;
+            }
+            case LauncherSettings.Settings.METHOD_CLEAR_USE_TEST_WORKSPACE_LAYOUT_FLAG: {
+                mUseTestWorkspaceLayout = false;
+                return null;
+            }
             case LauncherSettings.Settings.METHOD_LOAD_DEFAULT_FAVORITES: {
                 loadDefaultFavoritesIfNecessary();
                 return null;
@@ -609,7 +621,8 @@
 
     private DefaultLayoutParser getDefaultLayoutParser(AppWidgetHost widgetHost) {
         InvariantDeviceProfile idp = LauncherAppState.getIDP(getContext());
-        int defaultLayout = idp.defaultLayoutId;
+        int defaultLayout = mUseTestWorkspaceLayout
+                ? TEST_WORKSPACE_LAYOUT_RES_XML : idp.defaultLayoutId;
 
         if (getContext().getSystemService(UserManager.class).isDemoUser()
                 && idp.demoModeLayoutId != 0) {
diff --git a/src/com/android/launcher3/LauncherSettings.java b/src/com/android/launcher3/LauncherSettings.java
index 048aaaa..66195f3 100644
--- a/src/com/android/launcher3/LauncherSettings.java
+++ b/src/com/android/launcher3/LauncherSettings.java
@@ -374,6 +374,12 @@
 
         public static final String METHOD_CREATE_EMPTY_DB = "create_empty_db";
 
+        public static final String METHOD_SET_USE_TEST_WORKSPACE_LAYOUT_FLAG =
+                "set_use_test_workspace_layout_flag";
+
+        public static final String METHOD_CLEAR_USE_TEST_WORKSPACE_LAYOUT_FLAG =
+                "clear_use_test_workspace_layout_flag";
+
         public static final String METHOD_LOAD_DEFAULT_FAVORITES = "load_default_favorites";
 
         public static final String METHOD_REMOVE_GHOST_WIDGETS = "remove_ghost_widgets";
diff --git a/src/com/android/launcher3/dragndrop/DragView.java b/src/com/android/launcher3/dragndrop/DragView.java
index b914ae2..a3945fd 100644
--- a/src/com/android/launcher3/dragndrop/DragView.java
+++ b/src/com/android/launcher3/dragndrop/DragView.java
@@ -98,6 +98,7 @@
     final ValueAnimator mAnim;
     // Whether mAnim has started. Unlike mAnim.isStarted(), this is true even after mAnim ends.
     private boolean mAnimStarted;
+    private Runnable mOnAnimEndCallback = null;
 
     private int mLastTouchX;
     private int mLastTouchY;
@@ -180,6 +181,14 @@
             public void onAnimationStart(Animator animation) {
                 mAnimStarted = true;
             }
+
+            @Override
+            public void onAnimationEnd(Animator animation) {
+                super.onAnimationEnd(animation);
+                if (mOnAnimEndCallback != null) {
+                    mOnAnimEndCallback.run();
+                }
+            }
         });
 
         setDragRegion(new Rect(0, 0, width, height));
@@ -199,6 +208,10 @@
         setWillNotDraw(false);
     }
 
+    public void setOnAnimationEndCallback(Runnable callback) {
+        mOnAnimEndCallback = callback;
+    }
+
     /**
      * Initialize {@code #mIconDrawable} if the item can be represented using
      * an {@link AdaptiveIconDrawable} or {@link FolderAdaptiveIcon}.
diff --git a/src/com/android/launcher3/testing/TestProtocol.java b/src/com/android/launcher3/testing/TestProtocol.java
index afeef58..faf5817 100644
--- a/src/com/android/launcher3/testing/TestProtocol.java
+++ b/src/com/android/launcher3/testing/TestProtocol.java
@@ -82,6 +82,10 @@
     public static final String REQUEST_IS_LAUNCHER_INITIALIZED = "is-launcher-initialized";
     public static final String REQUEST_FREEZE_APP_LIST = "freeze-app-list";
     public static final String REQUEST_UNFREEZE_APP_LIST = "unfreeze-app-list";
+    public static final String REQUEST_ENABLE_MANUAL_TASKBAR_STASHING = "enable-taskbar-stashing";
+    public static final String REQUEST_DISABLE_MANUAL_TASKBAR_STASHING = "disable-taskbar-stashing";
+    public static final String REQUEST_UNSTASH_TASKBAR_IF_STASHED = "unstash-taskbar-if-stashed";
+    public static final String REQUEST_STASHED_TASKBAR_HEIGHT = "stashed-taskbar-height";
     public static final String REQUEST_APP_LIST_FREEZE_FLAGS = "app-list-freeze-flags";
     public static final String REQUEST_APPS_LIST_SCROLL_Y = "apps-list-scroll-y";
     public static final String REQUEST_WIDGETS_SCROLL_Y = "widgets-scroll-y";
@@ -96,6 +100,10 @@
     public static final String REQUEST_GET_HAD_NONTEST_EVENTS = "get-had-nontest-events";
     public static final String REQUEST_STOP_EVENT_LOGGING = "stop-event-logging";
     public static final String REQUEST_CLEAR_DATA = "clear-data";
+    public static final String REQUEST_USE_TEST_WORKSPACE_LAYOUT = "use-test-workspace-layout";
+    public static final String REQUEST_USE_DEFAULT_WORKSPACE_LAYOUT =
+            "use-default-workspace-layout";
+    public static final String REQUEST_HOTSEAT_ICON_NAMES = "get-hotseat-icon-names";
     public static final String REQUEST_IS_TABLET = "is-tablet";
     public static final String REQUEST_IS_TWO_PANELS = "is-two-panel";
     public static final String REQUEST_START_DRAG_THRESHOLD = "start-drag-threshold";
diff --git a/tests/AndroidManifest-common.xml b/tests/AndroidManifest-common.xml
index b4cd773..9cc3aed 100644
--- a/tests/AndroidManifest-common.xml
+++ b/tests/AndroidManifest-common.xml
@@ -94,7 +94,6 @@
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
-                <category android:name="android.intent.category.DEFAULT"/>
             </intent-filter>
         </activity>
 
@@ -138,6 +137,7 @@
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
+                <category android:name="android.intent.category.DEFAULT"/>
             </intent-filter>
             <intent-filter>
                 <action android:name="com.android.launcher3.intent.action.test_shortcut"/>
diff --git a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
index c99c4f1..136f115 100644
--- a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
+++ b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
@@ -567,6 +567,7 @@
                             ordinal == TestProtocol.OVERVIEW_STATE_ORDINAL);
                     break;
                 }
+                case TASKBAR_ALL_APPS:
                 case LAUNCHED_APP: {
                     assertTrue("Launcher is resumed in state: " + expectedContainerType,
                             !isResumed);
@@ -580,9 +581,10 @@
             }
         } else {
             assertTrue(
-                    "Container type is not LAUNCHED_APP or FALLBACK_OVERVIEW: "
-                            + expectedContainerType,
+                    "Container type is not LAUNCHED_APP, TASKBAR_ALL_APPS "
+                            + "or FALLBACK_OVERVIEW: " + expectedContainerType,
                     expectedContainerType == ContainerType.LAUNCHED_APP
+                            || expectedContainerType == ContainerType.TASKBAR_ALL_APPS
                             || expectedContainerType == ContainerType.FALLBACK_OVERVIEW);
         }
     }
diff --git a/tests/tapl/com/android/launcher3/tapl/AllApps.java b/tests/tapl/com/android/launcher3/tapl/AllApps.java
index 3658f41..bfb115d 100644
--- a/tests/tapl/com/android/launcher3/tapl/AllApps.java
+++ b/tests/tapl/com/android/launcher3/tapl/AllApps.java
@@ -74,7 +74,7 @@
             LauncherInstrumentation.log("hasClickableIcon: icon has insufficient height");
             return false;
         }
-        if (iconCenterInSearchBox(allAppsContainer, icon)) {
+        if (hasSearchBox() && iconCenterInSearchBox(allAppsContainer, icon)) {
             LauncherInstrumentation.log("hasClickableIcon: icon center is under search box");
             return false;
         }
@@ -107,7 +107,7 @@
             final UiObject2 allAppsContainer = verifyActiveContainer();
             final UiObject2 appListRecycler = mLauncher.waitForObjectInContainer(allAppsContainer,
                     "apps_list_view");
-            final UiObject2 searchBox = getSearchBox(allAppsContainer);
+            final UiObject2 searchBox = hasSearchBox() ? getSearchBox(allAppsContainer) : null;
 
             int deviceHeight = mLauncher.getRealDisplaySize().y;
             int bottomGestureStartOnScreen = mLauncher.getBottomGestureStartOnScreen();
@@ -128,8 +128,10 @@
                                                 mLauncher.getVisibleBounds(icon).top
                                                         < bottomGestureStartOnScreen)
                                         .collect(Collectors.toList()),
-                                mLauncher.getVisibleBounds(searchBox).bottom
-                                        - mLauncher.getVisibleBounds(allAppsContainer).top);
+                                hasSearchBox()
+                                        ? mLauncher.getVisibleBounds(searchBox).bottom
+                                        - mLauncher.getVisibleBounds(allAppsContainer).top
+                                        : 0);
                         verifyActiveContainer();
                         final int newScroll = getAllAppsScroll();
                         mLauncher.assertTrue(
@@ -173,18 +175,21 @@
         return appIcon;
     }
 
+    @NonNull
     protected abstract AppIcon createAppIcon(UiObject2 icon);
 
+    protected abstract boolean hasSearchBox();
+
     private void scrollBackToBeginning() {
         try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
                 "want to scroll back in all apps")) {
             LauncherInstrumentation.log("Scrolling to the beginning");
             final UiObject2 allAppsContainer = verifyActiveContainer();
-            final UiObject2 searchBox = getSearchBox(allAppsContainer);
+            final UiObject2 searchBox = hasSearchBox() ? getSearchBox(allAppsContainer) : null;
 
             int attempts = 0;
-            final Rect margins =
-                    new Rect(0, mLauncher.getVisibleBounds(searchBox).bottom + 1, 0, 5);
+            final Rect margins = new Rect(
+                    0, hasSearchBox() ? mLauncher.getVisibleBounds(searchBox).bottom + 1 : 0, 0, 5);
 
             for (int scroll = getAllAppsScroll();
                     scroll != 0;
@@ -196,7 +201,11 @@
                         ++attempts <= MAX_SCROLL_ATTEMPTS);
 
                 mLauncher.scroll(
-                        allAppsContainer, Direction.UP, margins, 12, false);
+                        allAppsContainer,
+                        Direction.UP,
+                        margins,
+                        /* steps= */ 12,
+                        /* slowDown= */ false);
             }
 
             try (LauncherInstrumentation.Closable c1 = mLauncher.addContextLayer("scrolled up")) {
@@ -225,7 +234,11 @@
             final UiObject2 allAppsContainer = verifyActiveContainer();
             // Start the gesture in the center to avoid starting at elements near the top.
             mLauncher.scroll(
-                    allAppsContainer, Direction.DOWN, new Rect(0, 0, 0, mHeight / 2), 10, false);
+                    allAppsContainer,
+                    Direction.DOWN,
+                    new Rect(0, 0, 0, mHeight / 2),
+                    /* steps= */ 10,
+                    /* slowDown= */ false);
             verifyActiveContainer();
         }
     }
@@ -240,7 +253,11 @@
             final UiObject2 allAppsContainer = verifyActiveContainer();
             // Start the gesture in the center, for symmetry with forward.
             mLauncher.scroll(
-                    allAppsContainer, Direction.UP, new Rect(0, mHeight / 2, 0, 0), 10, false);
+                    allAppsContainer,
+                    Direction.UP,
+                    new Rect(0, mHeight / 2, 0, 0),
+                    /* steps= */ 10,
+                    /*slowDown= */ false);
             verifyActiveContainer();
         }
     }
diff --git a/tests/tapl/com/android/launcher3/tapl/AllAppsFromTaskbar.java b/tests/tapl/com/android/launcher3/tapl/AllAppsFromTaskbar.java
new file mode 100644
index 0000000..5164025
--- /dev/null
+++ b/tests/tapl/com/android/launcher3/tapl/AllAppsFromTaskbar.java
@@ -0,0 +1,51 @@
+/*
+ * 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.launcher3.tapl;
+
+import androidx.annotation.NonNull;
+import androidx.test.uiautomator.UiObject2;
+
+/**
+ * Operations on AllApps opened from the Taskbar.
+ */
+public class AllAppsFromTaskbar extends AllApps {
+
+    AllAppsFromTaskbar(LauncherInstrumentation launcher) {
+        super(launcher);
+    }
+
+    @Override
+    protected LauncherInstrumentation.ContainerType getContainerType() {
+        return LauncherInstrumentation.ContainerType.TASKBAR_ALL_APPS;
+    }
+
+    @NonNull
+    @Override
+    public TaskbarAppIcon getAppIcon(String appName) {
+        return (TaskbarAppIcon) super.getAppIcon(appName);
+    }
+
+    @NonNull
+    @Override
+    protected TaskbarAppIcon createAppIcon(UiObject2 icon) {
+        return new TaskbarAppIcon(mLauncher, icon);
+    }
+
+    @Override
+    protected boolean hasSearchBox() {
+        return false;
+    }
+}
diff --git a/tests/tapl/com/android/launcher3/tapl/AppIcon.java b/tests/tapl/com/android/launcher3/tapl/AppIcon.java
index bef242c..e28f0af 100644
--- a/tests/tapl/com/android/launcher3/tapl/AppIcon.java
+++ b/tests/tapl/com/android/launcher3/tapl/AppIcon.java
@@ -51,7 +51,7 @@
     public AppIconMenu openMenu() {
         try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
             return createMenu(mLauncher.clickAndGet(
-                    mObject, "popup_container", getLongClickEvent()));
+                    mObject, /* resName= */ "popup_container", getLongClickEvent()));
         }
     }
 
@@ -61,7 +61,7 @@
     public AppIconMenu openDeepShortcutMenu() {
         try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
             return createMenu(mLauncher.clickAndGet(
-                    mObject, "deep_shortcuts_container", getLongClickEvent()));
+                    mObject, /* resName= */ "deep_shortcuts_container", getLongClickEvent()));
         }
     }
 
@@ -73,8 +73,8 @@
     }
 
     @Override
-    protected String getLongPressIndicator() {
-        return "popup_container";
+    protected void waitForLongPressConfirmation() {
+        mLauncher.waitForLauncherObject("popup_container");
     }
 
     @Override
diff --git a/tests/tapl/com/android/launcher3/tapl/AppIconMenuItem.java b/tests/tapl/com/android/launcher3/tapl/AppIconMenuItem.java
index a6a1531..5cf5aba 100644
--- a/tests/tapl/com/android/launcher3/tapl/AppIconMenuItem.java
+++ b/tests/tapl/com/android/launcher3/tapl/AppIconMenuItem.java
@@ -41,8 +41,8 @@
     }
 
     @Override
-    protected String getLongPressIndicator() {
-        return "drop_target_bar";
+    protected void waitForLongPressConfirmation() {
+        mLauncher.waitForLauncherObject("drop_target_bar");
     }
 
     @Override
diff --git a/tests/tapl/com/android/launcher3/tapl/HomeAllApps.java b/tests/tapl/com/android/launcher3/tapl/HomeAllApps.java
index 2e00d59..c275f3b 100644
--- a/tests/tapl/com/android/launcher3/tapl/HomeAllApps.java
+++ b/tests/tapl/com/android/launcher3/tapl/HomeAllApps.java
@@ -35,8 +35,14 @@
         return (AllAppsAppIcon) super.getAppIcon(appName);
     }
 
+    @NonNull
     @Override
     protected HomeAppIcon createAppIcon(UiObject2 icon) {
         return new AllAppsAppIcon(mLauncher, icon);
     }
+
+    @Override
+    protected boolean hasSearchBox() {
+        return true;
+    }
 }
diff --git a/tests/tapl/com/android/launcher3/tapl/HomeAppIcon.java b/tests/tapl/com/android/launcher3/tapl/HomeAppIcon.java
index baabe12..71d8ba9 100644
--- a/tests/tapl/com/android/launcher3/tapl/HomeAppIcon.java
+++ b/tests/tapl/com/android/launcher3/tapl/HomeAppIcon.java
@@ -51,8 +51,7 @@
                     () -> {
                         final Rect bounds = target.getDropLocationBounds();
                         return new Point(bounds.centerX(), bounds.centerY());
-                    },
-                    getLongPressIndicator());
+                    });
             FolderIcon result = target.getTargetFolder(dropBounds);
             mLauncher.assertTrue("Can't find the target folder.", result != null);
             return result;
@@ -115,8 +114,12 @@
                      String.format("want to drag the icon to cell(%d, %d)", cellX, cellY))
         ) {
             final Supplier<Point> dest = () -> Workspace.getCellCenter(mLauncher, cellX, cellY);
-            Workspace.dragIconToWorkspace(mLauncher, this, dest, getLongPressIndicator(),
-                    () -> addExpectedEventsForLongClick(), null);
+            Workspace.dragIconToWorkspace(
+                    mLauncher,
+                    /* launchable= */ this,
+                    dest,
+                    () -> addExpectedEventsForLongClick(),
+                    /*expectDropEvents= */ null);
             try (LauncherInstrumentation.Closable ignore = mLauncher.addContextLayer("dragged")) {
                 WorkspaceAppIcon appIcon =
                         (WorkspaceAppIcon) mLauncher.getWorkspace().getWorkspaceAppIcon(mAppName);
diff --git a/tests/tapl/com/android/launcher3/tapl/Launchable.java b/tests/tapl/com/android/launcher3/tapl/Launchable.java
index a28eac6..45a0196 100644
--- a/tests/tapl/com/android/launcher3/tapl/Launchable.java
+++ b/tests/tapl/com/android/launcher3/tapl/Launchable.java
@@ -97,8 +97,7 @@
         return new LaunchedAppState(mLauncher);
     }
 
-    Point startDrag(long downTime, String longPressIndicator,
-            Runnable expectLongClickEvents, boolean runToSpringLoadedState) {
+    Point startDrag(long downTime, Runnable expectLongClickEvents, boolean runToSpringLoadedState) {
         final Point iconCenter = getObject().getVisibleCenter();
         final Point dragStartCenter = new Point(iconCenter.x,
                 iconCenter.y - getStartDragThreshold());
@@ -108,7 +107,6 @@
                     downTime,
                     iconCenter,
                     dragStartCenter,
-                    longPressIndicator,
                     expectLongClickEvents),
                     SPRING_LOADED_STATE_ORDINAL, "long-pressing and triggering drag start");
         } else {
@@ -116,7 +114,6 @@
                     downTime,
                     iconCenter,
                     dragStartCenter,
-                    longPressIndicator,
                     expectLongClickEvents);
         }
 
@@ -125,21 +122,43 @@
     }
 
     /**
+     * Waits for a confirmation that a long press has successfully been triggered.
+     *
+     * This method waits for a view to either appear or disappear to confirm that the long press
+     * has been triggered and fails if no confirmation is received before the default timeout.
+     */
+    protected abstract void waitForLongPressConfirmation();
+
+    /**
      * Drags this Launchable a short distance before starting a full drag.
      *
      * This is necessary for shortcuts, which require being dragged beyond a threshold to close
      * their container and start drag callbacks.
      */
-    private void movePointerForStartDrag(long downTime, Point iconCenter, Point dragStartCenter,
-            String longPressIndicator, Runnable expectLongClickEvents) {
-        mLauncher.sendPointer(downTime, downTime, MotionEvent.ACTION_DOWN,
-                iconCenter, LauncherInstrumentation.GestureScope.INSIDE);
+    private void movePointerForStartDrag(
+            long downTime,
+            Point iconCenter,
+            Point dragStartCenter,
+            Runnable expectLongClickEvents) {
+        mLauncher.sendPointer(
+                downTime,
+                downTime,
+                MotionEvent.ACTION_DOWN,
+                iconCenter,
+                LauncherInstrumentation.GestureScope.INSIDE);
         LauncherInstrumentation.log("movePointerForStartDrag: sent down");
         expectLongClickEvents.run();
-        mLauncher.waitForLauncherObject(longPressIndicator);
+        waitForLongPressConfirmation();
         LauncherInstrumentation.log("movePointerForStartDrag: indicator");
-        mLauncher.movePointer(iconCenter, dragStartCenter, DEFAULT_DRAG_STEPS, false,
-                downTime, downTime, true, LauncherInstrumentation.GestureScope.INSIDE);
+        mLauncher.movePointer(
+                iconCenter,
+                dragStartCenter,
+                DEFAULT_DRAG_STEPS,
+                /* isDecelerating= */ false,
+                downTime,
+                downTime,
+                /* slowDown= */ true,
+                LauncherInstrumentation.GestureScope.INSIDE);
     }
 
     private int getStartDragThreshold() {
@@ -148,6 +167,4 @@
     }
 
     protected abstract void addExpectedEventsForLongClick();
-
-    protected abstract String getLongPressIndicator();
 }
diff --git a/tests/tapl/com/android/launcher3/tapl/LaunchedAppState.java b/tests/tapl/com/android/launcher3/tapl/LaunchedAppState.java
index 3f1be80..2033a42 100644
--- a/tests/tapl/com/android/launcher3/tapl/LaunchedAppState.java
+++ b/tests/tapl/com/android/launcher3/tapl/LaunchedAppState.java
@@ -16,11 +16,27 @@
 
 package com.android.launcher3.tapl;
 
+import static com.android.launcher3.testing.TestProtocol.REQUEST_DISABLE_MANUAL_TASKBAR_STASHING;
+import static com.android.launcher3.testing.TestProtocol.REQUEST_ENABLE_MANUAL_TASKBAR_STASHING;
+import static com.android.launcher3.testing.TestProtocol.REQUEST_STASHED_TASKBAR_HEIGHT;
+
+import android.graphics.Point;
+import android.graphics.Rect;
+import android.os.SystemClock;
+import android.view.MotionEvent;
+
+import androidx.test.uiautomator.By;
+
+import com.android.launcher3.testing.TestProtocol;
+
 /**
  * Background state operations specific to when an app has been launched.
  */
 public final class LaunchedAppState extends Background {
 
+    // More drag steps than Launchables to give the window manager time to register the drag.
+    private static final int DEFAULT_DRAG_STEPS = 35;
+
     LaunchedAppState(LauncherInstrumentation launcher) {
         super(launcher);
     }
@@ -29,4 +45,126 @@
     protected LauncherInstrumentation.ContainerType getContainerType() {
         return LauncherInstrumentation.ContainerType.LAUNCHED_APP;
     }
+
+    /**
+     * Returns the taskbar.
+     *
+     * The taskbar must already be visible when calling this method.
+     */
+    public Taskbar getTaskbar() {
+        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                "want to get the taskbar")) {
+            mLauncher.waitForLauncherObject("taskbar_view");
+
+            return new Taskbar(mLauncher);
+        }
+    }
+
+    /**
+     * Returns the Taskbar in a visible state.
+     *
+     * The taskbar must already be hidden when calling this method.
+     */
+    public Taskbar showTaskbar() {
+        mLauncher.getTestInfo(REQUEST_ENABLE_MANUAL_TASKBAR_STASHING);
+
+        try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
+             LauncherInstrumentation.Closable c1 = mLauncher.addContextLayer(
+                     "want to show the taskbar")) {
+            mLauncher.waitUntilLauncherObjectGone("taskbar_view");
+
+            final long downTime = SystemClock.uptimeMillis();
+            final int unstashTargetY = mLauncher.getRealDisplaySize().y
+                    - (mLauncher.getTestInfo(REQUEST_STASHED_TASKBAR_HEIGHT)
+                            .getInt(TestProtocol.TEST_INFO_RESPONSE_FIELD) / 2);
+            final Point unstashTarget = new Point(
+                    mLauncher.getRealDisplaySize().x / 2, unstashTargetY);
+
+            mLauncher.sendPointer(downTime, downTime, MotionEvent.ACTION_DOWN, unstashTarget,
+                    LauncherInstrumentation.GestureScope.OUTSIDE_WITH_PILFER);
+            LauncherInstrumentation.log("showTaskbar: sent down");
+
+            try (LauncherInstrumentation.Closable c2 = mLauncher.addContextLayer("pressed down")) {
+                mLauncher.waitForLauncherObject("taskbar_view");
+                mLauncher.sendPointer(downTime, downTime, MotionEvent.ACTION_UP, unstashTarget,
+                        LauncherInstrumentation.GestureScope.OUTSIDE_WITH_PILFER);
+
+                return new Taskbar(mLauncher);
+            }
+        } finally {
+            mLauncher.getTestInfo(REQUEST_DISABLE_MANUAL_TASKBAR_STASHING);
+        }
+    }
+
+    static void dragToSplitscreen(
+            LauncherInstrumentation launcher, Launchable launchable, String expectedNewPackageName,
+            String expectedExistingPackageName) {
+        try (LauncherInstrumentation.Closable c1 = launcher.addContextLayer(
+                "want to drag taskbar item to splitscreen")) {
+            final Point displaySize = launcher.getRealDisplaySize();
+            final Point endPoint = new Point(displaySize.x / 4, 3 * displaySize.y / 4);
+            final long downTime = SystemClock.uptimeMillis();
+            // Use mObject before starting drag since the system drag and drop moves the original
+            // view.
+            Point itemVisibleCenter = launchable.mObject.getVisibleCenter();
+            Rect itemVisibleBounds = launcher.getVisibleBounds(launchable.mObject);
+            String itemLabel = launchable.mObject.getText();
+
+            Point dragStart = launchable.startDrag(
+                    downTime,
+                    launchable::addExpectedEventsForLongClick,
+                    /* runToSpringLoadedState= */ false);
+
+            try (LauncherInstrumentation.Closable c2 = launcher.addContextLayer(
+                    "started item drag")) {
+                launcher.movePointer(
+                        dragStart,
+                        endPoint,
+                        DEFAULT_DRAG_STEPS,
+                        /* isDecelerating= */ true,
+                        downTime,
+                        SystemClock.uptimeMillis(),
+                        /* slowDown= */ false,
+                        LauncherInstrumentation.GestureScope.INSIDE);
+
+                try (LauncherInstrumentation.Closable c3 = launcher.addContextLayer(
+                        "moved pointer to drop point")) {
+                    dropDraggedItem(
+                            launcher,
+                            launchable,
+                            expectedNewPackageName,
+                            endPoint, downTime,
+                            itemVisibleCenter,
+                            itemVisibleBounds,
+                            itemLabel,
+                            expectedExistingPackageName);
+                }
+            }
+        }
+    }
+
+    private static void dropDraggedItem(
+            LauncherInstrumentation launcher, Launchable launchable, String expectedNewPackageName,
+            Point endPoint, long downTime, Point itemVisibleCenter, Rect itemVisibleBounds,
+            String itemLabel, String expectedExistingPackageName) {
+        LauncherInstrumentation.log("SplitscreenDragSource.dragToSplitscreen before drop "
+                + itemVisibleCenter + " in " + itemVisibleBounds);
+
+        launchable.executeAndWaitForWindowChange(() -> {
+            launcher.sendPointer(
+                    downTime,
+                    SystemClock.uptimeMillis(),
+                    MotionEvent.ACTION_UP,
+                    endPoint,
+                    LauncherInstrumentation.GestureScope.INSIDE_TO_OUTSIDE_WITHOUT_PILFER);
+            LauncherInstrumentation.log("SplitscreenDragSource.dragToSplitscreen: after "
+                    + "drop");
+        }, itemLabel, "dropping taskbar item");
+
+        try (LauncherInstrumentation.Closable c = launcher.addContextLayer("dropped item")) {
+            launchable.assertAppLaunched(itemLabel, By.pkg(expectedNewPackageName));
+            launcher.checkPackagesVisible(
+                    new String[] {expectedNewPackageName, expectedExistingPackageName});
+        }
+    }
 }
diff --git a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
index bbfbc55..1e3b078 100644
--- a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
+++ b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
@@ -84,6 +84,7 @@
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Optional;
+import java.util.Set;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 import java.util.function.Consumer;
@@ -123,7 +124,8 @@
     // Types for launcher containers that the user is interacting with. "Background" is a
     // pseudo-container corresponding to inactive launcher covered by another app.
     public enum ContainerType {
-        WORKSPACE, HOME_ALL_APPS, OVERVIEW, WIDGETS, FALLBACK_OVERVIEW, LAUNCHED_APP
+        WORKSPACE, HOME_ALL_APPS, OVERVIEW, WIDGETS, FALLBACK_OVERVIEW, LAUNCHED_APP,
+        TASKBAR_ALL_APPS
     }
 
     public enum NavigationModel {ZERO_BUTTON, THREE_BUTTON}
@@ -167,6 +169,7 @@
     private static final String OVERVIEW_RES_ID = "overview_panel";
     private static final String WIDGETS_RES_ID = "primary_widgets_list_view";
     private static final String CONTEXT_MENU_RES_ID = "popup_container";
+    private static final String TASKBAR_RES_ID = "taskbar_view";
     public static final int WAIT_TIME_MS = 60000;
     private static final String SYSTEMUI_PACKAGE = "com.android.systemui";
     private static final String ANDROID_PACKAGE = "android";
@@ -500,6 +503,16 @@
         }
     }
 
+    void checkPackagesVisible(String[] expectedVisiblePackages) {
+        Set<String> actualVisiblePackages =
+                getVisiblePackagesStream().collect(Collectors.toSet());
+
+        for (String expectedVisible : expectedVisiblePackages) {
+            assertTrue("Expected package not visible: " + expectedVisible,
+                    actualVisiblePackages.contains(expectedVisible));
+        }
+    }
+
     private String getVisiblePackages() {
         final String apps = getVisiblePackagesStream().collect(Collectors.joining(", "));
         return !apps.isEmpty()
@@ -722,27 +735,41 @@
                     waitUntilLauncherObjectGone(APPS_RES_ID);
                     waitUntilLauncherObjectGone(OVERVIEW_RES_ID);
                     waitUntilLauncherObjectGone(WIDGETS_RES_ID);
+                    waitUntilLauncherObjectGone(TASKBAR_RES_ID);
+
                     return waitForLauncherObject(WORKSPACE_RES_ID);
                 }
                 case WIDGETS: {
                     waitUntilLauncherObjectGone(WORKSPACE_RES_ID);
                     waitUntilLauncherObjectGone(APPS_RES_ID);
                     waitUntilLauncherObjectGone(OVERVIEW_RES_ID);
+                    waitUntilLauncherObjectGone(TASKBAR_RES_ID);
+
                     return waitForLauncherObject(WIDGETS_RES_ID);
                 }
+                case TASKBAR_ALL_APPS:
                 case HOME_ALL_APPS: {
                     waitUntilLauncherObjectGone(WORKSPACE_RES_ID);
                     waitUntilLauncherObjectGone(OVERVIEW_RES_ID);
                     waitUntilLauncherObjectGone(WIDGETS_RES_ID);
+                    waitUntilLauncherObjectGone(TASKBAR_RES_ID);
+
                     return waitForLauncherObject(APPS_RES_ID);
                 }
                 case OVERVIEW: {
                     waitUntilLauncherObjectGone(APPS_RES_ID);
                     waitUntilLauncherObjectGone(WORKSPACE_RES_ID);
                     waitUntilLauncherObjectGone(WIDGETS_RES_ID);
+                    waitUntilLauncherObjectGone(TASKBAR_RES_ID);
+
                     return waitForLauncherObject(OVERVIEW_RES_ID);
                 }
                 case FALLBACK_OVERVIEW: {
+                    waitUntilLauncherObjectGone(APPS_RES_ID);
+                    waitUntilLauncherObjectGone(WORKSPACE_RES_ID);
+                    waitUntilLauncherObjectGone(WIDGETS_RES_ID);
+                    waitUntilLauncherObjectGone(TASKBAR_RES_ID);
+
                     return waitForFallbackLauncherObject(OVERVIEW_RES_ID);
                 }
                 case LAUNCHED_APP: {
@@ -750,6 +777,12 @@
                     waitUntilLauncherObjectGone(APPS_RES_ID);
                     waitUntilLauncherObjectGone(OVERVIEW_RES_ID);
                     waitUntilLauncherObjectGone(WIDGETS_RES_ID);
+
+                    if (isTablet() && !isFallbackOverview()) {
+                        waitForLauncherObject(TASKBAR_RES_ID);
+                    } else {
+                        waitUntilLauncherObjectGone(TASKBAR_RES_ID);
+                    }
                     return null;
                 }
                 default:
@@ -863,8 +896,13 @@
                 setForcePauseTimeout(FORCE_PAUSE_TIMEOUT_MS);
 
                 final Point displaySize = getRealDisplaySize();
+                // The swipe up to home gesture starts from inside the launcher when the user is
+                // already home. Otherwise, the gesture can start inside the launcher process if the
+                // taskbar is visible.
                 boolean gestureStartFromLauncher = isTablet()
-                        ? !isLauncher3() || hasLauncherObject(WORKSPACE_RES_ID)
+                        ? !isLauncher3()
+                        || hasLauncherObject(WORKSPACE_RES_ID)
+                        || hasLauncherObject(TASKBAR_RES_ID)
                         : isLauncherVisible();
 
                 // CLose floating views before going back to home.
@@ -1301,9 +1339,7 @@
     }
 
     void scrollToLastVisibleRow(
-            UiObject2 container,
-            Collection<UiObject2> items,
-            int topPaddingInContainer) {
+            UiObject2 container, Collection<UiObject2> items, int topPaddingInContainer) {
         final UiObject2 lowestItem = Collections.max(items, (i1, i2) ->
                 Integer.compare(getVisibleBounds(i1).top, getVisibleBounds(i2).top));
 
@@ -1326,8 +1362,8 @@
                         containerRect.height() - distance - bottomGestureMarginInContainer,
                         0,
                         bottomGestureMarginInContainer),
-                10,
-                true);
+                /* steps= */ 10,
+                /* slowDown= */ true);
     }
 
     void scrollLeftByDistance(UiObject2 container, int distance) {
@@ -1650,6 +1686,29 @@
         getTestInfo(TestProtocol.REQUEST_CLEAR_DATA);
     }
 
+    /**
+     * Reloads the workspace with a test layout that includes the Test Activity app icon on the
+     * hotseat.
+     */
+    public void useTestWorkspaceLayoutOnReload() {
+        getTestInfo(TestProtocol.REQUEST_USE_TEST_WORKSPACE_LAYOUT);
+    }
+
+    /** Reloads the workspace with the default layout defined by the user's grid size selection. */
+    public void useDefaultWorkspaceLayoutOnReload() {
+        getTestInfo(TestProtocol.REQUEST_USE_DEFAULT_WORKSPACE_LAYOUT);
+    }
+
+    /** Shows the taskbar if it is hidden, otherwise does nothing. */
+    public void showTaskbarIfHidden() {
+        getTestInfo(TestProtocol.REQUEST_UNSTASH_TASKBAR_IF_STASHED);
+    }
+
+    public List<String> getHotseatIconNames() {
+        return getTestInfo(TestProtocol.REQUEST_HOTSEAT_ICON_NAMES)
+                .getStringArrayList(TestProtocol.TEST_INFO_RESPONSE_FIELD);
+    }
+
     private String[] getActivities() {
         return getTestInfo(TestProtocol.REQUEST_GET_ACTIVITIES)
                 .getStringArray(TestProtocol.TEST_INFO_RESPONSE_FIELD);
diff --git a/tests/tapl/com/android/launcher3/tapl/SplitscreenDragSource.java b/tests/tapl/com/android/launcher3/tapl/SplitscreenDragSource.java
new file mode 100644
index 0000000..ce1c3c0
--- /dev/null
+++ b/tests/tapl/com/android/launcher3/tapl/SplitscreenDragSource.java
@@ -0,0 +1,39 @@
+/*
+ * 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.launcher3.tapl;
+
+/** Launchable that can serve as a source for dragging and dropping to splitscreen. */
+interface SplitscreenDragSource {
+
+    /**
+     * Drags this app icon to the left (landscape) or bottom (portrait) of the screen, launching it
+     * in splitscreen.
+     *
+     * @param expectedNewPackageName package name of the app being dragged
+     * @param expectedExistingPackageName package name of the already-launched app
+     */
+    default void dragToSplitscreen(
+            String expectedNewPackageName, String expectedExistingPackageName) {
+        Launchable launchable = getLaunchable();
+        LauncherInstrumentation launcher = launchable.mLauncher;
+        try (LauncherInstrumentation.Closable e = launcher.eventsCheck()) {
+            LaunchedAppState.dragToSplitscreen(
+                    launcher, launchable, expectedNewPackageName, expectedExistingPackageName);
+        }
+    }
+
+    Launchable getLaunchable();
+}
diff --git a/tests/tapl/com/android/launcher3/tapl/Taskbar.java b/tests/tapl/com/android/launcher3/tapl/Taskbar.java
new file mode 100644
index 0000000..b5a08c3
--- /dev/null
+++ b/tests/tapl/com/android/launcher3/tapl/Taskbar.java
@@ -0,0 +1,123 @@
+/*
+ * 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.launcher3.tapl;
+
+import static com.android.launcher3.testing.TestProtocol.REQUEST_DISABLE_MANUAL_TASKBAR_STASHING;
+import static com.android.launcher3.testing.TestProtocol.REQUEST_ENABLE_MANUAL_TASKBAR_STASHING;
+
+import android.graphics.Point;
+import android.os.SystemClock;
+import android.text.TextUtils;
+import android.view.MotionEvent;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.test.uiautomator.By;
+import androidx.test.uiautomator.BySelector;
+import androidx.test.uiautomator.UiObject2;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * Operations on the Taskbar from LaunchedApp.
+ */
+public final class Taskbar {
+
+    private final LauncherInstrumentation mLauncher;
+
+    Taskbar(LauncherInstrumentation launcher) {
+        mLauncher = launcher;
+    }
+
+    /**
+     * Returns an app icon with the given name. This fails if the icon is not found.
+     */
+    @NonNull
+    public TaskbarAppIcon getAppIcon(String appName) {
+        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                "want to get a taskbar icon")) {
+            return new TaskbarAppIcon(mLauncher, mLauncher.waitForObjectInContainer(
+                    mLauncher.waitForLauncherObject("taskbar_view"),
+                    AppIcon.getAppIconSelector(appName, mLauncher)));
+        }
+    }
+
+    /**
+     * Hides this taskbar.
+     *
+     * The taskbar must already be visible when calling this method.
+     */
+    public void hide() {
+        mLauncher.getTestInfo(REQUEST_ENABLE_MANUAL_TASKBAR_STASHING);
+
+        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                "want to hide the taskbar");
+             LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+            mLauncher.waitForLauncherObject("taskbar_view");
+
+            final long downTime = SystemClock.uptimeMillis();
+            Point stashTarget = new Point(
+                    mLauncher.getRealDisplaySize().x - 1, mLauncher.getRealDisplaySize().y - 1);
+
+            mLauncher.sendPointer(downTime, downTime, MotionEvent.ACTION_DOWN, stashTarget,
+                    LauncherInstrumentation.GestureScope.INSIDE);
+            LauncherInstrumentation.log("hideTaskbar: sent down");
+
+            try (LauncherInstrumentation.Closable c2 = mLauncher.addContextLayer("pressed down")) {
+                mLauncher.waitUntilLauncherObjectGone("taskbar_view");
+                mLauncher.sendPointer(downTime, downTime, MotionEvent.ACTION_UP, stashTarget,
+                        LauncherInstrumentation.GestureScope.INSIDE);
+            }
+        } finally {
+            mLauncher.getTestInfo(REQUEST_DISABLE_MANUAL_TASKBAR_STASHING);
+        }
+    }
+
+    /**
+     * Opens the Taskbar all apps page.
+     */
+    public AllAppsFromTaskbar openAllApps() {
+        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                "want to open taskbar all apps");
+             LauncherInstrumentation.Closable e = mLauncher.eventsCheck()) {
+
+            mLauncher.clickLauncherObject(mLauncher.waitForObjectInContainer(
+                    mLauncher.waitForLauncherObject("taskbar_view"), getAllAppsButtonSelector()));
+
+            return new AllAppsFromTaskbar(mLauncher);
+        }
+    }
+
+    /** Returns a list of app icon names on the Taskbar */
+    public List<String> getIconNames() {
+        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                "want to get all taskbar icons")) {
+            return mLauncher.waitForObjectsInContainer(
+                    mLauncher.waitForLauncherObject("taskbar_view"),
+                    AppIcon.getAnyAppIconSelector())
+                    .stream()
+                    .map(UiObject2::getText)
+                    .filter(text -> !TextUtils.isEmpty(text)) // Filter out the all apps button
+                    .collect(Collectors.toList());
+        }
+    }
+
+    private static BySelector getAllAppsButtonSelector() {
+        // Look for an icon with no text
+        return By.clazz(TextView.class).text("");
+    }
+}
diff --git a/tests/tapl/com/android/launcher3/tapl/TaskbarAppIcon.java b/tests/tapl/com/android/launcher3/tapl/TaskbarAppIcon.java
new file mode 100644
index 0000000..099acd4
--- /dev/null
+++ b/tests/tapl/com/android/launcher3/tapl/TaskbarAppIcon.java
@@ -0,0 +1,52 @@
+/*
+ * 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.launcher3.tapl;
+
+import androidx.test.uiautomator.UiObject2;
+
+import java.util.regex.Pattern;
+
+/**
+ * App icon specifically on the Taskbar.
+ */
+public final class TaskbarAppIcon extends AppIcon implements SplitscreenDragSource {
+
+    private static final Pattern LONG_CLICK_EVENT = Pattern.compile("onTaskbarItemLongClick");
+
+    TaskbarAppIcon(LauncherInstrumentation launcher, UiObject2 icon) {
+        super(launcher, icon);
+    }
+
+    @Override
+    protected Pattern getLongClickEvent() {
+        return LONG_CLICK_EVENT;
+    }
+
+    @Override
+    public TaskbarAppIconMenu openDeepShortcutMenu() {
+        return (TaskbarAppIconMenu) super.openDeepShortcutMenu();
+    }
+
+    @Override
+    protected TaskbarAppIconMenu createMenu(UiObject2 menu) {
+        return new TaskbarAppIconMenu(mLauncher, menu);
+    }
+
+    @Override
+    public Launchable getLaunchable() {
+        return this;
+    }
+}
diff --git a/tests/tapl/com/android/launcher3/tapl/TaskbarAppIconMenu.java b/tests/tapl/com/android/launcher3/tapl/TaskbarAppIconMenu.java
new file mode 100644
index 0000000..1f137c5
--- /dev/null
+++ b/tests/tapl/com/android/launcher3/tapl/TaskbarAppIconMenu.java
@@ -0,0 +1,38 @@
+/*
+ * 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.launcher3.tapl;
+
+import androidx.test.uiautomator.UiObject2;
+
+/**
+ * Context menu of a Taskbar app icon.
+ */
+public final class TaskbarAppIconMenu extends AppIconMenu {
+
+    TaskbarAppIconMenu(LauncherInstrumentation launcher, UiObject2 deepShortcutsContainer) {
+        super(launcher, deepShortcutsContainer);
+    }
+
+    @Override
+    public TaskbarAppIconMenuItem getMenuItem(String shortcutText) {
+        return (TaskbarAppIconMenuItem) super.getMenuItem(shortcutText);
+    }
+
+    @Override
+    protected TaskbarAppIconMenuItem createMenuItem(UiObject2 menuItem) {
+        return new TaskbarAppIconMenuItem(mLauncher, menuItem);
+    }
+}
diff --git a/tests/tapl/com/android/launcher3/tapl/TaskbarAppIconMenuItem.java b/tests/tapl/com/android/launcher3/tapl/TaskbarAppIconMenuItem.java
new file mode 100644
index 0000000..69a8a08
--- /dev/null
+++ b/tests/tapl/com/android/launcher3/tapl/TaskbarAppIconMenuItem.java
@@ -0,0 +1,57 @@
+/*
+ * 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.launcher3.tapl;
+
+import androidx.test.uiautomator.UiObject2;
+
+import com.android.launcher3.testing.TestProtocol;
+
+import java.util.regex.Pattern;
+
+/**
+ * Menu item in a Taskbar app icon menu.
+ */
+public final class TaskbarAppIconMenuItem extends AppIconMenuItem implements SplitscreenDragSource {
+
+    private static final Pattern LONG_CLICK_EVENT = Pattern.compile("onTaskbarItemLongClick");
+
+    TaskbarAppIconMenuItem(
+            LauncherInstrumentation launcher, UiObject2 shortcut) {
+        super(launcher, shortcut);
+    }
+
+    @Override
+    protected void addExpectedEventsForLongClick() {
+        mLauncher.expectEvent(TestProtocol.SEQUENCE_MAIN, LONG_CLICK_EVENT);
+    }
+
+    @Override
+    protected void waitForLongPressConfirmation() {
+        // On long-press, the popup container closes and the system drag-and-drop begins. This
+        // only leaves launcher views that were previously visible.
+        mLauncher.waitUntilLauncherObjectGone("popup_container");
+    }
+
+    @Override
+    protected String launchableType() {
+        return "taskbar app icon menu item";
+    }
+
+    @Override
+    public Launchable getLaunchable() {
+        return this;
+    }
+}
diff --git a/tests/tapl/com/android/launcher3/tapl/Widget.java b/tests/tapl/com/android/launcher3/tapl/Widget.java
index 73e9830..2346249 100644
--- a/tests/tapl/com/android/launcher3/tapl/Widget.java
+++ b/tests/tapl/com/android/launcher3/tapl/Widget.java
@@ -39,8 +39,8 @@
     }
 
     @Override
-    protected String getLongPressIndicator() {
-        return "drop_target_bar";
+    protected void waitForLongPressConfirmation() {
+        mLauncher.waitForLauncherObject("drop_target_bar");
     }
 
     @Override
diff --git a/tests/tapl/com/android/launcher3/tapl/Workspace.java b/tests/tapl/com/android/launcher3/tapl/Workspace.java
index 3bc5389..fee4490 100644
--- a/tests/tapl/com/android/launcher3/tapl/Workspace.java
+++ b/tests/tapl/com/android/launcher3/tapl/Workspace.java
@@ -205,7 +205,6 @@
                 mLauncher,
                 homeAppIcon,
                 new Point(targetX, mLauncher.getVisibleBounds(workspace).centerY()),
-                "popup_container",
                 false,
                 false,
                 () -> mLauncher.expectEvent(
@@ -244,11 +243,11 @@
              LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
                      "removing app icon from workspace")) {
             dragIconToWorkspace(
-                    mLauncher, homeAppIcon,
+                    mLauncher,
+                    homeAppIcon,
                     () -> getDropPointFromDropTargetBar(mLauncher, DELETE_TARGET_TEXT_ID),
-                    homeAppIcon.getLongPressIndicator(),
                     () -> mLauncher.expectEvent(TestProtocol.SEQUENCE_MAIN, LONG_CLICK_EVENT),
-                    null);
+                    /* expectDropEvents= */ null);
 
             try (LauncherInstrumentation.Closable c1 = mLauncher.addContextLayer(
                     "dragged the app to the drop bar")) {
@@ -274,11 +273,11 @@
         try (LauncherInstrumentation.Closable c = launcher.addContextLayer(
                 "uninstalling app icon")) {
             dragIconToWorkspace(
-                    launcher, homeAppIcon,
+                    launcher,
+                    homeAppIcon,
                     () -> getDropPointFromDropTargetBar(launcher, UNINSTALL_TARGET_TEXT_ID),
-                    homeAppIcon.getLongPressIndicator(),
                     expectLongClickEvents,
-                    null);
+                    /* expectDropEvents= */null);
 
             launcher.waitUntilLauncherObjectGone(DROP_BAR_RES_ID);
 
@@ -345,15 +344,15 @@
     }
 
     static void dragIconToWorkspace(LauncherInstrumentation launcher, Launchable launchable,
-            Point dest, String longPressIndicator, boolean startsActivity, boolean isWidgetShortcut,
+            Point dest, boolean startsActivity, boolean isWidgetShortcut,
             Runnable expectLongClickEvents) {
         Runnable expectDropEvents = null;
         if (startsActivity || isWidgetShortcut) {
             expectDropEvents = () -> launcher.expectEvent(TestProtocol.SEQUENCE_MAIN,
                     LauncherInstrumentation.EVENT_START);
         }
-        dragIconToWorkspace(launcher, launchable, () -> dest, longPressIndicator,
-                expectLongClickEvents, expectDropEvents);
+        dragIconToWorkspace(
+                launcher, launchable, () -> dest, expectLongClickEvents, expectDropEvents);
     }
 
     /**
@@ -361,22 +360,27 @@
      * (There is no slow down time before drop event)
      * This function expects the launchable is inside the workspace and there is no drop event.
      */
-    static void dragIconToWorkspace(LauncherInstrumentation launcher, Launchable launchable,
-            Supplier<Point> destSupplier, String longPressIndicator) {
-        dragIconToWorkspace(launcher, launchable, destSupplier, longPressIndicator,
-                () -> launcher.expectEvent(TestProtocol.SEQUENCE_MAIN, LONG_CLICK_EVENT), null);
+    static void dragIconToWorkspace(
+            LauncherInstrumentation launcher, Launchable launchable, Supplier<Point> destSupplier) {
+        dragIconToWorkspace(
+                launcher,
+                launchable,
+                destSupplier,
+                () -> launcher.expectEvent(TestProtocol.SEQUENCE_MAIN, LONG_CLICK_EVENT),
+                /* expectDropEvents= */ null);
     }
 
     static void dragIconToWorkspace(
-            LauncherInstrumentation launcher, Launchable launchable, Supplier<Point> dest,
-            String longPressIndicator, Runnable expectLongClickEvents,
+            LauncherInstrumentation launcher,
+            Launchable launchable,
+            Supplier<Point> dest,
+            Runnable expectLongClickEvents,
             @Nullable Runnable expectDropEvents) {
         try (LauncherInstrumentation.Closable ignored = launcher.addContextLayer(
                 "want to drag icon to workspace")) {
             final long downTime = SystemClock.uptimeMillis();
             Point dragStart = launchable.startDrag(
                     downTime,
-                    longPressIndicator,
                     expectLongClickEvents,
                     /* runToSpringLoadedState= */ true);
             Point targetDest = dest.get();
diff --git a/tests/tapl/com/android/launcher3/tapl/WorkspaceDragSource.java b/tests/tapl/com/android/launcher3/tapl/WorkspaceDragSource.java
index 93c2213..d8d4420 100644
--- a/tests/tapl/com/android/launcher3/tapl/WorkspaceDragSource.java
+++ b/tests/tapl/com/android/launcher3/tapl/WorkspaceDragSource.java
@@ -41,7 +41,6 @@
                                     ? launchableCenter.x - width / 2
                                     : launchableCenter.x + width / 2,
                             displaySize.y / 2),
-                    launchable.getLongPressIndicator(),
                     startsActivity,
                     isWidgetShortcut,
                     launchable::addExpectedEventsForLongClick);