Only show communal settings to the primary user

Fixes: 264284347
Test: flashed device, and verified settings don't appear for secondary
user. Setting still appears for primary user
Test: atest CommunalPreferenceControllerTest

Change-Id: I6686ce4dbc7d708a93131620ae93c5e0dc323995

src/com/android/settings/communal/CommunalPreferenceController.java

@@ -17,6 +17,7 @@
 package com.android.settings.communal;
 
 import android.content.Context;
+import android.os.UserManager;
 
 import com.android.settings.R;
 import com.android.settings.core.BasePreferenceController;
@@ -31,7 +32,14 @@ public class CommunalPreferenceController extends BasePreferenceController {
 
     @Override
     public int getAvailabilityStatus() {
-        return mContext.getResources().getBoolean(R.bool.config_show_communal_settings)
+        // TODO(b/257333623): Allow the communal user to be non-SystemUser user in HSUM.
+        return (mContext.getResources().getBoolean(R.bool.config_show_communal_settings)
+                && isSystemUser())
                 ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
     }
+
+    private boolean isSystemUser() {
+        final UserManager userManager = mContext.getSystemService(UserManager.class);
+        return userManager != null && userManager.isSystemUser();
+    }
 }

tests/unit/src/com/android/settings/communal/CommunalPreferenceControllerTest.java

@@ -0,0 +1,88 @@
+/*
+ * 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.communal;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.os.UserManager;
+
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.android.settings.testutils.ResourcesUtils;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+@RunWith(AndroidJUnit4.class)
+public class CommunalPreferenceControllerTest {
+    @Mock
+    private UserManager mUserManager;
+
+    private Resources mResources;
+    private CommunalPreferenceController mController;
+
+    private static final String PREF_KEY = "test_key";
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        final Context context = spy(ApplicationProvider.getApplicationContext());
+        mResources = spy(context.getResources());
+
+        mController = new CommunalPreferenceController(context, PREF_KEY);
+
+        when(context.getResources()).thenReturn(mResources);
+        when(context.getSystemService(UserManager.class)).thenReturn(mUserManager);
+    }
+
+    @Test
+    public void isAvailable_communalEnabled_shouldBeTrueForSystemUser() {
+        setCommunalEnabled(true);
+        when(mUserManager.isSystemUser()).thenReturn(true);
+        assertTrue(mController.isAvailable());
+    }
+
+    @Test
+    public void isAvailable_communalEnabled_shouldBeFalseForNonSystemUser() {
+        setCommunalEnabled(true);
+        when(mUserManager.isSystemUser()).thenReturn(false);
+        assertFalse(mController.isAvailable());
+    }
+
+    @Test
+    public void isAvailable_communalDisabled_shouldBeFalseForSystemUser() {
+        setCommunalEnabled(false);
+        when(mUserManager.isSystemUser()).thenReturn(true);
+        assertFalse(mController.isAvailable());
+    }
+
+    private void setCommunalEnabled(boolean enabled) {
+        final int boolId = ResourcesUtils.getResourcesId(
+                ApplicationProvider.getApplicationContext(), "bool",
+                "config_show_communal_settings");
+        when(mResources.getBoolean(boolId)).thenReturn(enabled);
+    }
+}