Show side fps hint on large screen bouncer

This adds an hint regarding the possibility to unlock with the fingerprint while on bouncer, only when sided bouncer is enabled (so only on large screens). The hint is visible while the sensor is running.

Bug: 226610828
Test: atest KeyguardSecurityContainerControllerTest
Change-Id: I961ae6fe67e92620e955a5e297052e255fddd80d
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardHostViewController.java b/packages/SystemUI/src/com/android/keyguard/KeyguardHostViewController.java
index 12fa401..d32219a 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardHostViewController.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardHostViewController.java
@@ -336,6 +336,11 @@
         mKeyguardSecurityContainerController.onStartingToHide();
     }
 
+    /** Called when bouncer visibility changes. */
+    public void onBouncerVisibilityChanged(@View.Visibility int visibility) {
+        mKeyguardSecurityContainerController.onBouncerVisibilityChanged(visibility);
+    }
+
     public boolean hasDismissActions() {
         return mDismissAction != null || mCancelAction != null;
     }
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardSecurityContainerController.java b/packages/SystemUI/src/com/android/keyguard/KeyguardSecurityContainerController.java
index 61e2624..5ee659b 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardSecurityContainerController.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardSecurityContainerController.java
@@ -17,6 +17,7 @@
 package com.android.keyguard;
 
 import static android.app.StatusBarManager.SESSION_KEYGUARD;
+import static android.hardware.biometrics.BiometricSourceType.FINGERPRINT;
 
 import static com.android.keyguard.KeyguardSecurityContainer.BOUNCER_DISMISS_BIOMETRIC;
 import static com.android.keyguard.KeyguardSecurityContainer.BOUNCER_DISMISS_EXTENDED_ACCESS;
@@ -32,11 +33,13 @@
 import android.content.Intent;
 import android.content.res.ColorStateList;
 import android.content.res.Configuration;
+import android.hardware.biometrics.BiometricSourceType;
 import android.metrics.LogMaker;
 import android.os.UserHandle;
 import android.util.Log;
 import android.util.Slog;
 import android.view.MotionEvent;
+import android.view.View;
 
 import androidx.annotation.Nullable;
 
@@ -55,6 +58,7 @@
 import com.android.settingslib.utils.ThreadUtils;
 import com.android.systemui.Gefingerpoken;
 import com.android.systemui.R;
+import com.android.systemui.biometrics.SidefpsController;
 import com.android.systemui.classifier.FalsingCollector;
 import com.android.systemui.flags.FeatureFlags;
 import com.android.systemui.flags.Flags;
@@ -67,6 +71,8 @@
 import com.android.systemui.util.ViewController;
 import com.android.systemui.util.settings.GlobalSettings;
 
+import java.util.Optional;
+
 import javax.inject.Inject;
 
 /** Controller for {@link KeyguardSecurityContainer} */
@@ -93,6 +99,7 @@
     private final GlobalSettings mGlobalSettings;
     private final FeatureFlags mFeatureFlags;
     private final SessionTracker mSessionTracker;
+    private final Optional<SidefpsController> mSidefpsController;
 
     private int mLastOrientation = Configuration.ORIENTATION_UNDEFINED;
 
@@ -236,13 +243,27 @@
                     reloadColors();
                 }
             };
+    private boolean mBouncerVisible = false;
     private final KeyguardUpdateMonitorCallback mKeyguardUpdateMonitorCallback =
             new KeyguardUpdateMonitorCallback() {
-        @Override
-        public void onDevicePolicyManagerStateChanged() {
-            showPrimarySecurityScreen(false);
-        }
-    };
+                @Override
+                public void onDevicePolicyManagerStateChanged() {
+                    showPrimarySecurityScreen(false);
+                }
+
+                @Override
+                public void onBiometricRunningStateChanged(boolean running,
+                        BiometricSourceType biometricSourceType) {
+                    if (biometricSourceType == FINGERPRINT) {
+                        updateSideFpsVisibility();
+                    }
+                }
+
+                @Override
+                public void onStrongAuthStateChanged(int userId) {
+                    updateSideFpsVisibility();
+                }
+            };
 
     private KeyguardSecurityContainerController(KeyguardSecurityContainer view,
             AdminSecondaryLockScreenController.Factory adminSecondaryLockScreenControllerFactory,
@@ -260,7 +281,8 @@
             UserSwitcherController userSwitcherController,
             FeatureFlags featureFlags,
             GlobalSettings globalSettings,
-            SessionTracker sessionTracker) {
+            SessionTracker sessionTracker,
+            Optional<SidefpsController> sidefpsController) {
         super(view);
         mLockPatternUtils = lockPatternUtils;
         mUpdateMonitor = keyguardUpdateMonitor;
@@ -280,6 +302,7 @@
         mFeatureFlags = featureFlags;
         mGlobalSettings = globalSettings;
         mSessionTracker = sessionTracker;
+        mSidefpsController = sidefpsController;
     }
 
     @Override
@@ -311,8 +334,23 @@
             getCurrentSecurityController().onPause();
         }
         mView.onPause();
+        // It might happen that onStartingToHide is not called when the device is locked while on
+        // bouncer.
+        setBouncerVisible(false);
     }
 
+    private void updateSideFpsVisibility() {
+        if (!mSidefpsController.isPresent()) {
+            return;
+        }
+        if (mBouncerVisible && mView.isSidedSecurityMode()
+                && mUpdateMonitor.isFingerprintDetectionRunning()
+                && !mUpdateMonitor.userNeedsStrongAuth()) {
+            mSidefpsController.get().show();
+        } else {
+            mSidefpsController.get().hide();
+        }
+    }
 
     /**
      * Shows the primary security screen for the user. This will be either the multi-selector
@@ -397,6 +435,17 @@
         if (mCurrentSecurityMode != SecurityMode.None) {
             getCurrentSecurityController().onStartingToHide();
         }
+        setBouncerVisible(false);
+    }
+
+    /** Called when the bouncer changes visibility. */
+    public void onBouncerVisibilityChanged(@View.Visibility int visibility) {
+        setBouncerVisible(visibility == View.VISIBLE);
+    }
+
+    private void setBouncerVisible(boolean visible) {
+        mBouncerVisible = visible;
+        updateSideFpsVisibility();
     }
 
     /**
@@ -655,6 +704,7 @@
         private final FeatureFlags mFeatureFlags;
         private final UserSwitcherController mUserSwitcherController;
         private final SessionTracker mSessionTracker;
+        private final Optional<SidefpsController> mSidefpsController;
 
         @Inject
         Factory(KeyguardSecurityContainer view,
@@ -673,7 +723,8 @@
                 UserSwitcherController userSwitcherController,
                 FeatureFlags featureFlags,
                 GlobalSettings globalSettings,
-                SessionTracker sessionTracker) {
+                SessionTracker sessionTracker,
+                Optional<SidefpsController> sidefpsController) {
             mView = view;
             mAdminSecondaryLockScreenControllerFactory = adminSecondaryLockScreenControllerFactory;
             mLockPatternUtils = lockPatternUtils;
@@ -690,6 +741,7 @@
             mGlobalSettings = globalSettings;
             mUserSwitcherController = userSwitcherController;
             mSessionTracker = sessionTracker;
+            mSidefpsController = sidefpsController;
         }
 
         public KeyguardSecurityContainerController create(
@@ -699,7 +751,8 @@
                     mKeyguardUpdateMonitor, mKeyguardSecurityModel, mMetricsLogger, mUiEventLogger,
                     mKeyguardStateController, securityCallback, mSecurityViewFlipperController,
                     mConfigurationController, mFalsingCollector, mFalsingManager,
-                    mUserSwitcherController, mFeatureFlags, mGlobalSettings, mSessionTracker);
+                    mUserSwitcherController, mFeatureFlags, mGlobalSettings, mSessionTracker,
+                    mSidefpsController);
         }
     }
 }
diff --git a/packages/SystemUI/src/com/android/keyguard/dagger/KeyguardBouncerModule.java b/packages/SystemUI/src/com/android/keyguard/dagger/KeyguardBouncerModule.java
index b3c1158..49e9783 100644
--- a/packages/SystemUI/src/com/android/keyguard/dagger/KeyguardBouncerModule.java
+++ b/packages/SystemUI/src/com/android/keyguard/dagger/KeyguardBouncerModule.java
@@ -16,6 +16,10 @@
 
 package com.android.keyguard.dagger;
 
+import static com.android.systemui.biometrics.SidefpsControllerKt.hasSideFpsSensor;
+
+import android.annotation.Nullable;
+import android.hardware.fingerprint.FingerprintManager;
 import android.view.LayoutInflater;
 import android.view.ViewGroup;
 
@@ -23,9 +27,14 @@
 import com.android.keyguard.KeyguardSecurityContainer;
 import com.android.keyguard.KeyguardSecurityViewFlipper;
 import com.android.systemui.R;
+import com.android.systemui.biometrics.SidefpsController;
 import com.android.systemui.dagger.qualifiers.RootView;
 import com.android.systemui.statusbar.phone.KeyguardBouncer;
 
+import java.util.Optional;
+
+import javax.inject.Provider;
+
 import dagger.Module;
 import dagger.Provides;
 
@@ -60,4 +69,16 @@
             KeyguardSecurityContainer containerView) {
         return containerView.findViewById(R.id.view_flipper);
     }
+
+    /** Provides {@link SidefpsController} if the device has the side fingerprint sensor. */
+    @Provides
+    @KeyguardBouncerScope
+    static Optional<SidefpsController> providesOptionalSidefpsController(
+            @Nullable FingerprintManager fingerprintManager,
+            Provider<SidefpsController> sidefpsControllerProvider) {
+        if (!hasSideFpsSensor(fingerprintManager)) {
+            return Optional.empty();
+        }
+        return Optional.of(sidefpsControllerProvider.get());
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/SidefpsController.kt b/packages/SystemUI/src/com/android/systemui/biometrics/SidefpsController.kt
index 04e2dccd..bbffb73 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/SidefpsController.kt
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/SidefpsController.kt
@@ -34,16 +34,16 @@
 import android.os.Handler
 import android.util.Log
 import android.util.RotationUtils
-import android.view.View.AccessibilityDelegate
-import android.view.accessibility.AccessibilityEvent
 import android.view.Display
 import android.view.Gravity
 import android.view.LayoutInflater
 import android.view.Surface
 import android.view.View
+import android.view.View.AccessibilityDelegate
 import android.view.ViewPropertyAnimator
 import android.view.WindowInsets
 import android.view.WindowManager
+import android.view.accessibility.AccessibilityEvent
 import androidx.annotation.RawRes
 import com.airbnb.lottie.LottieAnimationView
 import com.airbnb.lottie.LottieProperty
@@ -70,13 +70,12 @@
     private val activityTaskManager: ActivityTaskManager,
     overviewProxyService: OverviewProxyService,
     displayManager: DisplayManager,
-    @Main mainExecutor: DelayableExecutor,
+    @Main private val mainExecutor: DelayableExecutor,
     @Main private val handler: Handler
 ) {
     @VisibleForTesting
     val sensorProps: FingerprintSensorPropertiesInternal = fingerprintManager
-        ?.sensorPropertiesInternal
-        ?.firstOrNull { it.isAnySidefpsType }
+        ?.sideFpsSensorProperties
         ?: throw IllegalStateException("no side fingerprint sensor")
 
     @VisibleForTesting
@@ -135,25 +134,34 @@
     }
 
     init {
-        fingerprintManager?.setSidefpsController(object : ISidefpsController.Stub() {
-            override fun show(
-                sensorId: Int,
-                @BiometricOverlayConstants.ShowReason reason: Int
-            ) = if (reason.isReasonToShow(activityTaskManager)) doShow() else hide(sensorId)
+        fingerprintManager?.setSidefpsController(
+            object : ISidefpsController.Stub() {
+                override fun show(
+                    sensorId: Int,
+                    @BiometricOverlayConstants.ShowReason reason: Int
+                ) = if (reason.isReasonToShow(activityTaskManager)) show() else hide()
 
-            private fun doShow() = mainExecutor.execute {
-                if (overlayView == null) {
-                    createOverlayForDisplay()
-                } else {
-                    Log.v(TAG, "overlay already shown")
-                }
-            }
-
-            override fun hide(sensorId: Int) = mainExecutor.execute { overlayView = null }
-        })
+                override fun hide(sensorId: Int) = hide()
+            })
         overviewProxyService.addCallback(overviewProxyListener)
     }
 
+    /** Shows the side fps overlay if not already shown. */
+    fun show() {
+        mainExecutor.execute {
+            if (overlayView == null) {
+                createOverlayForDisplay()
+            } else {
+                Log.v(TAG, "overlay already shown")
+            }
+        }
+    }
+
+    /** Hides the fps overlay if shown. */
+    fun hide() {
+        mainExecutor.execute { overlayView = null }
+    }
+
     private fun onOrientationChanged() {
         if (overlayView != null) {
             createOverlayForDisplay()
@@ -266,6 +274,12 @@
     }
 }
 
+private val FingerprintManager?.sideFpsSensorProperties: FingerprintSensorPropertiesInternal?
+    get() = this?.sensorPropertiesInternal?.firstOrNull { it.isAnySidefpsType }
+
+/** Returns [True] when the device has a side fingerprint sensor. */
+fun FingerprintManager?.hasSideFpsSensor(): Boolean = this?.sideFpsSensorProperties != null
+
 @BiometricOverlayConstants.ShowReason
 private fun Int.isReasonToShow(activityTaskManager: ActivityTaskManager): Boolean = when (this) {
     REASON_AUTH_KEYGUARD -> false
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardBouncer.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardBouncer.java
index ed3d4ad..4ddaffc 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardBouncer.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardBouncer.java
@@ -266,6 +266,9 @@
 
     private void setVisibility(@View.Visibility int visibility) {
         mContainer.setVisibility(visibility);
+        if (mKeyguardViewController != null) {
+            mKeyguardViewController.onBouncerVisibilityChanged(visibility);
+        }
         dispatchVisibilityChanged();
     }
 
@@ -645,7 +648,7 @@
         /**
          * Invoked when the bouncer expansion reaches {@link KeyguardBouncer#EXPANSION_VISIBLE}.
          * This is NOT called each time the bouncer is shown, but rather only when the fully
-         * shown amount has changed based on the panel expansion. The bouncer is visibility
+         * shown amount has changed based on the panel expansion. The bouncer's visibility
          * can still change when the expansion amount hasn't changed.
          * See {@link KeyguardBouncer#isShowing()} for the checks for the bouncer showing state.
          */
diff --git a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardHostViewControllerTest.java b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardHostViewControllerTest.java
index ac1a83c..4021652 100644
--- a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardHostViewControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardHostViewControllerTest.java
@@ -20,6 +20,7 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.inOrder;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -31,6 +32,7 @@
 import android.testing.TestableLooper;
 import android.testing.TestableResources;
 import android.view.Gravity;
+import android.view.View;
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 
@@ -42,6 +44,7 @@
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.InOrder;
 import org.mockito.Mock;
 import org.mockito.junit.MockitoJUnit;
 import org.mockito.junit.MockitoRule;
@@ -104,6 +107,17 @@
     }
 
     @Test
+    public void onBouncerVisible_propagatesToKeyguardSecurityContainerController() {
+        mKeyguardHostViewController.onBouncerVisibilityChanged(ViewGroup.VISIBLE);
+        mKeyguardHostViewController.onBouncerVisibilityChanged(ViewGroup.INVISIBLE);
+
+        InOrder order = inOrder(mKeyguardSecurityContainerController);
+        order.verify(mKeyguardSecurityContainerController).onBouncerVisibilityChanged(View.VISIBLE);
+        order.verify(mKeyguardSecurityContainerController).onBouncerVisibilityChanged(
+                View.INVISIBLE);
+    }
+
+    @Test
     public void testGravityReappliedOnConfigurationChange() {
         FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(
                 ViewGroup.LayoutParams.MATCH_PARENT,
diff --git a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardSecurityContainerControllerTest.java b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardSecurityContainerControllerTest.java
index bc35142..68e49c0 100644
--- a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardSecurityContainerControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardSecurityContainerControllerTest.java
@@ -25,17 +25,21 @@
 import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.ArgumentMatchers.anyLong;
 import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.atLeastOnce;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 import android.content.res.Configuration;
 import android.content.res.Resources;
+import android.hardware.biometrics.BiometricSourceType;
 import android.testing.AndroidTestingRunner;
 import android.testing.TestableLooper;
 import android.view.MotionEvent;
+import android.view.View;
 import android.view.WindowInsetsController;
 
 import androidx.test.filters.SmallTest;
@@ -46,6 +50,7 @@
 import com.android.keyguard.KeyguardSecurityModel.SecurityMode;
 import com.android.systemui.R;
 import com.android.systemui.SysuiTestCase;
+import com.android.systemui.biometrics.SidefpsController;
 import com.android.systemui.classifier.FalsingCollector;
 import com.android.systemui.flags.FeatureFlags;
 import com.android.systemui.log.SessionTracker;
@@ -59,10 +64,14 @@
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
 import org.mockito.Mock;
 import org.mockito.junit.MockitoJUnit;
 import org.mockito.junit.MockitoRule;
 
+import java.util.Optional;
+
 @SmallTest
 @RunWith(AndroidTestingRunner.class)
 @TestableLooper.RunWithLooper()
@@ -124,6 +133,14 @@
     private SessionTracker mSessionTracker;
     @Mock
     private KeyguardViewController mKeyguardViewController;
+    @Mock
+    private SidefpsController mSidefpsController;
+    @Mock
+    private KeyguardPasswordViewController mKeyguardPasswordViewControllerMock;
+
+    @Captor
+    private ArgumentCaptor<KeyguardUpdateMonitorCallback> mKeyguardUpdateMonitorCallback;
+
     private Configuration mConfiguration;
 
     private KeyguardSecurityContainerController mKeyguardSecurityContainerController;
@@ -160,7 +177,7 @@
                 mKeyguardStateController, mKeyguardSecurityViewFlipperController,
                 mConfigurationController, mFalsingCollector, mFalsingManager,
                 mUserSwitcherController, mFeatureFlags, mGlobalSettings,
-                mSessionTracker).create(mSecurityCallback);
+                mSessionTracker, Optional.of(mSidefpsController)).create(mSecurityCallback);
     }
 
     @Test
@@ -258,9 +275,7 @@
     @Test
     public void showSecurityScreen_twoHandedMode_flagEnabled_noOneHandedMode() {
         when(mResources.getBoolean(R.bool.can_use_one_handed_bouncer)).thenReturn(true);
-        when(mKeyguardSecurityViewFlipperController.getSecurityView(
-                eq(SecurityMode.Password), any(KeyguardSecurityCallback.class)))
-                .thenReturn((KeyguardInputViewController) mKeyguardPasswordViewController);
+        setupGetSecurityView();
 
         mKeyguardSecurityContainerController.showSecurityScreen(SecurityMode.Password);
         verify(mView).initMode(MODE_DEFAULT, mGlobalSettings, mFalsingManager,
@@ -276,4 +291,126 @@
         verify(mUserSwitcherController)
                 .removeUserSwitchCallback(any(UserSwitcherController.UserSwitchCallback.class));
     }
+
+    @Test
+    public void onBouncerVisibilityChanged_allConditionsGood_sideFpsHintShown() {
+        setupConditionsToEnableSideFpsHint();
+        reset(mSidefpsController);
+
+        mKeyguardSecurityContainerController.onBouncerVisibilityChanged(View.VISIBLE);
+
+        verify(mSidefpsController).show();
+        verify(mSidefpsController, never()).hide();
+    }
+
+    @Test
+    public void onBouncerVisibilityChanged_fpsSensorNotRunning_sideFpsHintHidden() {
+        setupConditionsToEnableSideFpsHint();
+        setFingerprintDetectionRunning(false);
+        reset(mSidefpsController);
+
+        mKeyguardSecurityContainerController.onBouncerVisibilityChanged(View.VISIBLE);
+
+        verify(mSidefpsController).hide();
+        verify(mSidefpsController, never()).show();
+    }
+
+    @Test
+    public void onBouncerVisibilityChanged_withoutSidedSecurity_sideFpsHintHidden() {
+        setupConditionsToEnableSideFpsHint();
+        setSidedSecurityMode(false);
+        reset(mSidefpsController);
+
+        mKeyguardSecurityContainerController.onBouncerVisibilityChanged(View.VISIBLE);
+
+        verify(mSidefpsController).hide();
+        verify(mSidefpsController, never()).show();
+    }
+
+    @Test
+    public void onBouncerVisibilityChanged_needsStrongAuth_sideFpsHintHidden() {
+        setupConditionsToEnableSideFpsHint();
+        setNeedsStrongAuth(true);
+        reset(mSidefpsController);
+
+        mKeyguardSecurityContainerController.onBouncerVisibilityChanged(View.VISIBLE);
+
+        verify(mSidefpsController).hide();
+        verify(mSidefpsController, never()).show();
+    }
+
+    @Test
+    public void onBouncerVisibilityChanged_sideFpsHintShown_sideFpsHintHidden() {
+        setupGetSecurityView();
+        setupConditionsToEnableSideFpsHint();
+        mKeyguardSecurityContainerController.onBouncerVisibilityChanged(View.VISIBLE);
+        verify(mSidefpsController, atLeastOnce()).show();
+        reset(mSidefpsController);
+
+        mKeyguardSecurityContainerController.onBouncerVisibilityChanged(View.INVISIBLE);
+
+        verify(mSidefpsController).hide();
+        verify(mSidefpsController, never()).show();
+    }
+
+    @Test
+    public void onStartingToHide_sideFpsHintShown_sideFpsHintHidden() {
+        setupGetSecurityView();
+        setupConditionsToEnableSideFpsHint();
+        mKeyguardSecurityContainerController.onBouncerVisibilityChanged(View.VISIBLE);
+        verify(mSidefpsController, atLeastOnce()).show();
+        reset(mSidefpsController);
+
+        mKeyguardSecurityContainerController.onStartingToHide();
+
+        verify(mSidefpsController).hide();
+        verify(mSidefpsController, never()).show();
+    }
+
+    @Test
+    public void onPause_sideFpsHintShown_sideFpsHintHidden() {
+        setupGetSecurityView();
+        setupConditionsToEnableSideFpsHint();
+        mKeyguardSecurityContainerController.onBouncerVisibilityChanged(View.VISIBLE);
+        verify(mSidefpsController, atLeastOnce()).show();
+        reset(mSidefpsController);
+
+        mKeyguardSecurityContainerController.onPause();
+
+        verify(mSidefpsController).hide();
+        verify(mSidefpsController, never()).show();
+    }
+
+    private void setupConditionsToEnableSideFpsHint() {
+        attachView();
+        setSidedSecurityMode(true);
+        setFingerprintDetectionRunning(true);
+        setNeedsStrongAuth(false);
+    }
+
+    private void attachView() {
+        mKeyguardSecurityContainerController.onViewAttached();
+        verify(mKeyguardUpdateMonitor).registerCallback(mKeyguardUpdateMonitorCallback.capture());
+    }
+
+    private void setFingerprintDetectionRunning(boolean running) {
+        when(mKeyguardUpdateMonitor.isFingerprintDetectionRunning()).thenReturn(running);
+        mKeyguardUpdateMonitorCallback.getValue().onBiometricRunningStateChanged(running,
+                BiometricSourceType.FINGERPRINT);
+    }
+
+    private void setSidedSecurityMode(boolean sided) {
+        when(mView.isSidedSecurityMode()).thenReturn(sided);
+    }
+
+    private void setNeedsStrongAuth(boolean needed) {
+        when(mKeyguardUpdateMonitor.userNeedsStrongAuth()).thenReturn(needed);
+        mKeyguardUpdateMonitorCallback.getValue().onStrongAuthStateChanged(/* userId= */ 0);
+    }
+
+    private void setupGetSecurityView() {
+        when(mKeyguardSecurityViewFlipperController.getSecurityView(
+                any(), any(KeyguardSecurityCallback.class)))
+                .thenReturn((KeyguardInputViewController) mKeyguardPasswordViewControllerMock);
+    }
 }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/biometrics/SidefpsControllerTest.kt b/packages/SystemUI/tests/src/com/android/systemui/biometrics/SidefpsControllerTest.kt
index dec2b82..6157ccb 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/biometrics/SidefpsControllerTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/biometrics/SidefpsControllerTest.kt
@@ -62,7 +62,6 @@
 import org.mockito.ArgumentMatchers.eq
 import org.mockito.Captor
 import org.mockito.Mock
-import org.mockito.Mockito.`when`
 import org.mockito.Mockito.any
 import org.mockito.Mockito.anyFloat
 import org.mockito.Mockito.anyInt
@@ -72,6 +71,7 @@
 import org.mockito.Mockito.reset
 import org.mockito.Mockito.times
 import org.mockito.Mockito.verify
+import org.mockito.Mockito.`when` as whenEver
 import org.mockito.junit.MockitoJUnit
 
 private const val DISPLAY_ID = 2
@@ -126,15 +126,15 @@
         context.addMockSystemService(DisplayManager::class.java, displayManager)
         context.addMockSystemService(WindowManager::class.java, windowManager)
 
-        `when`(layoutInflater.inflate(R.layout.sidefps_view, null, false)).thenReturn(sidefpsView)
-        `when`(sidefpsView.findViewById<LottieAnimationView>(eq(R.id.sidefps_animation)))
+        whenEver(layoutInflater.inflate(R.layout.sidefps_view, null, false)).thenReturn(sidefpsView)
+        whenEver(sidefpsView.findViewById<LottieAnimationView>(eq(R.id.sidefps_animation)))
             .thenReturn(mock(LottieAnimationView::class.java))
         with(mock(ViewPropertyAnimator::class.java)) {
-            `when`(sidefpsView.animate()).thenReturn(this)
-            `when`(alpha(anyFloat())).thenReturn(this)
-            `when`(setStartDelay(anyLong())).thenReturn(this)
-            `when`(setDuration(anyLong())).thenReturn(this)
-            `when`(setListener(any())).thenAnswer {
+            whenEver(sidefpsView.animate()).thenReturn(this)
+            whenEver(alpha(anyFloat())).thenReturn(this)
+            whenEver(setStartDelay(anyLong())).thenReturn(this)
+            whenEver(setDuration(anyLong())).thenReturn(this)
+            whenEver(setListener(any())).thenAnswer {
                 (it.arguments[0] as Animator.AnimatorListener)
                     .onAnimationEnd(mock(Animator::class.java))
                 this
@@ -177,7 +177,7 @@
         displayBounds = Rect(0, 0, displayWidth, displayHeight)
         var locations = listOf(sensorLocation)
 
-        `when`(fingerprintManager.sensorPropertiesInternal).thenReturn(
+        whenEver(fingerprintManager.sensorPropertiesInternal).thenReturn(
             listOf(
                 FingerprintSensorPropertiesInternal(
                     SENSOR_ID,
@@ -196,12 +196,12 @@
         displayInfo.initInfo()
         val dmGlobal = mock(DisplayManagerGlobal::class.java)
         val display = Display(dmGlobal, DISPLAY_ID, displayInfo, DEFAULT_DISPLAY_ADJUSTMENTS)
-        `when`(dmGlobal.getDisplayInfo(eq(DISPLAY_ID))).thenReturn(displayInfo)
-        `when`(windowManager.defaultDisplay).thenReturn(display)
-        `when`(windowManager.maximumWindowMetrics).thenReturn(
+        whenEver(dmGlobal.getDisplayInfo(eq(DISPLAY_ID))).thenReturn(displayInfo)
+        whenEver(windowManager.defaultDisplay).thenReturn(display)
+        whenEver(windowManager.maximumWindowMetrics).thenReturn(
                 WindowMetrics(displayBounds, WindowInsets.CONSUMED)
         )
-        `when`(windowManager.currentWindowMetrics).thenReturn(
+        whenEver(windowManager.currentWindowMetrics).thenReturn(
             WindowMetrics(displayBounds, windowInsets)
         )
 
@@ -277,13 +277,13 @@
 
     @Test
     fun testShowsForMostSettings() = testWithDisplay {
-        `when`(activityTaskManager.getTasks(anyInt())).thenReturn(listOf(fpEnrollTask()))
+        whenEver(activityTaskManager.getTasks(anyInt())).thenReturn(listOf(fpEnrollTask()))
         testIgnoredFor(REASON_AUTH_SETTINGS, ignored = false)
     }
 
     @Test
     fun testIgnoredForVerySpecificSettings() = testWithDisplay {
-        `when`(activityTaskManager.getTasks(anyInt())).thenReturn(listOf(fpSettingsTask()))
+        whenEver(activityTaskManager.getTasks(anyInt())).thenReturn(listOf(fpSettingsTask()))
         testIgnoredFor(REASON_AUTH_SETTINGS)
     }
 
@@ -424,6 +424,20 @@
         assertThat(overlayViewParamsCaptor.value.x).isEqualTo(displayWidth - boundsWidth)
         assertThat(overlayViewParamsCaptor.value.y).isEqualTo(sensorLocation.sensorLocationY)
     }
+
+    @Test
+    fun hasSideFpsSensor_withSensorProps_returnsTrue() = testWithDisplay {
+        // By default all those tests assume the side fps sensor is available.
+
+        assertThat(fingerprintManager.hasSideFpsSensor()).isTrue()
+    }
+
+    @Test
+    fun hasSideFpsSensor_withoutSensorProps_returnsFalse() {
+        whenEver(fingerprintManager.sensorPropertiesInternal).thenReturn(null)
+
+        assertThat(fingerprintManager.hasSideFpsSensor()).isFalse()
+    }
 }
 
 private fun insetsForSmallNavbar() = insetsWithBottom(60)
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardBouncerTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardBouncerTest.java
index 39021d8..60a3d95 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardBouncerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardBouncerTest.java
@@ -230,6 +230,15 @@
     }
 
     @Test
+    public void show_notifiesKeyguardViewController() {
+        mBouncer.ensureView();
+
+        mBouncer.show(/* resetSecuritySelection= */ false);
+
+        verify(mKeyguardHostViewController).onBouncerVisibilityChanged(View.VISIBLE);
+    }
+
+    @Test
     public void testHide_notifiesFalsingManager() {
         mBouncer.hide(false);
         verify(mFalsingCollector).onBouncerHidden();