Show a dialog preventing face enrollment in split mode.

Test: atest CombinedBiometricProfileSettingsTest
Test: atest FingerprintSettingsFragmentTest
Test: manaul test- go to split screen mode and try to enroll
face
Bug: 276938441

Change-Id: I45e859b453700aa79f7774fb5deda81b1f30e5a5

tests/unit/src/com/android/settings/biometrics/face/FaceSettingsEnrollButtonPreferenceControllerTest.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2023 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.settings.biometrics.face;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.widget.Button;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+
+@RunWith(AndroidJUnit4.class)
+public class FaceSettingsEnrollButtonPreferenceControllerTest {
+    @Rule
+    public final MockitoRule mMockitoRule = MockitoJUnit.rule();
+    @Mock
+    private Context mContext;
+    @Mock
+    private Button mButton;
+    @Mock
+    private FaceSettingsEnrollButtonPreferenceController.Listener mListener;
+
+    private FaceSettingsEnrollButtonPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        mController = new FaceSettingsEnrollButtonPreferenceController(mContext);
+        mController.setListener(mListener);
+    }
+
+    @Test
+    public void isSliceable_returnFalse() {
+        assertThat(mController.isSliceable()).isFalse();
+    }
+
+    @Test
+    public void testOnClick_inFullScreen() {
+        when(mListener.checkInMultiWindowMode()).thenReturn(false);
+        mController.onClick(mButton);
+
+        assertThat(mController.isClicked()).isTrue();
+        verify(mListener).onStartEnrolling(any());
+    }
+
+    @Test
+    public void testOnClick_inMultiWindow() {
+        when(mListener.checkInMultiWindowMode()).thenReturn(true);
+        mController.onClick(mButton);
+
+        assertThat(mController.isClicked()).isFalse();
+        verify(mListener, never()).onStartEnrolling(any());
+    }
+}