[BackupCall] The toggle doesn't work when try to disable/enable it.

Bug: 192060713
Test: atest NetworkProviderBackupCallingGroupTest
Change-Id: I250c321d682f77e95967824ec033dd3c1ea64b65
diff --git a/src/com/android/settings/network/telephony/NetworkProviderBackupCallingGroup.java b/src/com/android/settings/network/telephony/NetworkProviderBackupCallingGroup.java
new file mode 100644
index 0000000..58dd18f
--- /dev/null
+++ b/src/com/android/settings/network/telephony/NetworkProviderBackupCallingGroup.java
@@ -0,0 +1,289 @@
+/*
+ * Copyright (C) 2021 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.network.telephony;
+
+import static androidx.lifecycle.Lifecycle.Event;
+
+import android.content.Context;
+import android.os.PersistableBundle;
+import android.telephony.CarrierConfigManager;
+import android.telephony.SubscriptionInfo;
+import android.telephony.SubscriptionManager;
+import android.telephony.TelephonyManager;
+import android.telephony.ims.ImsException;
+import android.telephony.ims.ImsManager;
+import android.telephony.ims.ImsMmTelManager;
+import android.util.ArrayMap;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.lifecycle.LifecycleObserver;
+import androidx.lifecycle.OnLifecycleEvent;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceGroup;
+import androidx.preference.PreferenceScreen;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.R;
+import com.android.settings.network.SubscriptionUtil;
+import com.android.settings.network.SubscriptionsChangeListener;
+import com.android.settings.network.ims.WifiCallingQueryImsState;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Preference controller for "Backup Calling"
+ **/
+public class NetworkProviderBackupCallingGroup extends
+        TelephonyTogglePreferenceController implements LifecycleObserver,
+        SubscriptionsChangeListener.SubscriptionsChangeListenerClient  {
+    private static final String TAG = "NetworkProviderBackupCallingGroup";
+    private static final String KEY_PREFERENCE_BACKUPCALLING_GROUP =
+            "provider_model_backup_call_group";
+    private static final int PREF_START_ORDER = 10;
+
+    private String mPreferenceGroupKey;
+    private PreferenceGroup mPreferenceGroup;
+    private Map<Integer, SwitchPreference> mBackupCallingForSubPreferences;
+    private List<SubscriptionInfo> mSubInfoListForBackupCall;
+    private Map<Integer, TelephonyManager> mTelephonyManagerList = new HashMap<>();
+    private SubscriptionsChangeListener mSubscriptionsChangeListener;
+
+    public NetworkProviderBackupCallingGroup(Context context, Lifecycle lifecycle,
+            List<SubscriptionInfo> subscriptionList, String preferenceGroupKey) {
+        super(context, preferenceGroupKey);
+        mPreferenceGroupKey = preferenceGroupKey;
+        mSubInfoListForBackupCall = subscriptionList;
+        mBackupCallingForSubPreferences = new ArrayMap<>();
+        setSubscriptionInfoList(context);
+        lifecycle.addObserver(this);
+    }
+
+    @OnLifecycleEvent(Event.ON_RESUME)
+    public void onResume() {
+        if (mSubscriptionsChangeListener == null) {
+            mSubscriptionsChangeListener = new SubscriptionsChangeListener(mContext, this);
+        }
+        mSubscriptionsChangeListener.start();
+    }
+
+    @OnLifecycleEvent(Event.ON_PAUSE)
+    public void onPause() {
+        if (mSubscriptionsChangeListener != null) {
+            mSubscriptionsChangeListener.stop();
+        }
+    }
+
+    @Override
+    public int getAvailabilityStatus(int subId) {
+        if (mSubInfoListForBackupCall == null
+                || getSubscriptionInfoFromList(mSubInfoListForBackupCall, subId) == null) {
+            return CONDITIONALLY_UNAVAILABLE;
+        }
+
+        return (mSubInfoListForBackupCall.size() > 1) ? AVAILABLE : CONDITIONALLY_UNAVAILABLE;
+    }
+
+    private boolean setCrossSimCallingEnabled(int subId, boolean checked) {
+        ImsMmTelManager imsMmTelMgr = getImsMmTelManager(subId);
+        if (imsMmTelMgr == null) {
+            Log.d(TAG, "setCrossSimCallingEnabled(), ImsMmTelManager is null");
+            return false;
+        }
+
+        try {
+            imsMmTelMgr.setCrossSimCallingEnabled(checked);
+        } catch (ImsException exception) {
+            Log.w(TAG, "fail to get cross SIM calling configuration", exception);
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean setChecked(boolean checked) {
+        return false;
+    }
+
+    private boolean isCrossSimCallingEnabled(int subId) {
+        ImsMmTelManager imsMmTelMgr = getImsMmTelManager(subId);
+        if (imsMmTelMgr == null) {
+            Log.d(TAG, "isCrossSimCallingEnabled(), ImsMmTelManager is null");
+            return false;
+        }
+        try {
+            return imsMmTelMgr.isCrossSimCallingEnabled();
+        } catch (ImsException exception) {
+            Log.w(TAG, "fail to get cross SIM calling configuration", exception);
+        }
+        return false;
+    }
+
+    @Override
+    public boolean isChecked() {
+        return false;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        mPreferenceGroup = screen.findPreference(mPreferenceGroupKey);
+        update();
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        // Do nothing in this case since preference is invisible
+        if (preference == null) {
+            return;
+        }
+        update();
+    }
+
+    private void update() {
+        if (mPreferenceGroup == null) {
+            return;
+        }
+
+        setSubscriptionInfoList(mContext);
+        if (mSubInfoListForBackupCall == null || mSubInfoListForBackupCall.size() < 2) {
+            for (SwitchPreference pref : mBackupCallingForSubPreferences.values()) {
+                mPreferenceGroup.removePreference(pref);
+            }
+            mBackupCallingForSubPreferences.clear();
+            return;
+        }
+
+        Map<Integer, SwitchPreference> toRemovePreferences = mBackupCallingForSubPreferences;
+        mBackupCallingForSubPreferences = new ArrayMap<>();
+        setSubscriptionInfoForPreference(toRemovePreferences);
+    }
+
+    private void setSubscriptionInfoForPreference(
+            Map<Integer, SwitchPreference> toRemovePreferences) {
+        int order = PREF_START_ORDER;
+        for (SubscriptionInfo subInfo : mSubInfoListForBackupCall) {
+            final int subId = subInfo.getSubscriptionId();
+
+            SwitchPreference pref = toRemovePreferences.remove(subId);
+            if (pref == null) {
+                pref = new SwitchPreference(mPreferenceGroup.getContext());
+                mPreferenceGroup.addPreference(pref);
+            }
+
+            CharSequence displayName = (subInfo == null) ? ""
+                    : SubscriptionUtil.getUniqueSubscriptionDisplayName(subInfo, mContext);
+            pref.setTitle(displayName);
+            pref.setOrder(order++);
+            pref.setSummary(getSummary(displayName));
+            boolean enabled = isCrossSimCallingEnabled(subId);
+            pref.setChecked(enabled);
+            pref.setOnPreferenceClickListener(clickedPref -> {
+                setCrossSimCallingEnabled(subId, !enabled);
+                return true;
+            });
+            mBackupCallingForSubPreferences.put(subId, pref);
+        }
+    }
+
+    private String getSummary(CharSequence displayName) {
+        String summary = String.format(
+                getResourcesForSubId().getString(R.string.backup_calling_setting_summary),
+                displayName)
+                .toString();
+        return summary;
+    }
+
+    private void setSubscriptionInfoList(Context context) {
+        if (mSubInfoListForBackupCall != null) {
+            mSubInfoListForBackupCall.removeIf(info -> {
+                int subId = info.getSubscriptionId();
+                setTelephonyManagerForSubscriptionId(context, subId);
+                if (!hasBackupCallingFeature(subId) && mSubInfoListForBackupCall.contains(info)) {
+                    return true;
+                }
+                return false;
+            });
+        } else {
+            Log.d(TAG, "No active subscriptions");
+        }
+    }
+
+    private void setTelephonyManagerForSubscriptionId(Context context, int subId) {
+        TelephonyManager telephonyManager = context.getSystemService(TelephonyManager.class)
+                .createForSubscriptionId(subId);
+        mTelephonyManagerList.put(subId, telephonyManager);
+    }
+
+    @VisibleForTesting
+    protected boolean hasBackupCallingFeature(int subscriptionId) {
+        return isCrossSimEnabledByPlatform(mContext, subscriptionId);
+    }
+
+    /**
+     * Copied from {@link BackupCallingPreferenceController}
+     **/
+    @VisibleForTesting
+    protected boolean isCrossSimEnabledByPlatform(Context context, int subscriptionId) {
+        // TODO : Change into API which created for accessing
+        //        com.android.ims.ImsManager#isCrossSimEnabledByPlatform()
+        if ((new WifiCallingQueryImsState(context, subscriptionId)).isWifiCallingSupported()) {
+            PersistableBundle bundle = getCarrierConfigForSubId(subscriptionId);
+            return (bundle != null) && bundle.getBoolean(
+                    CarrierConfigManager.KEY_CARRIER_CROSS_SIM_IMS_AVAILABLE_BOOL,
+                    false /*default*/);
+        }
+        Log.d(TAG, "WifiCalling is not supported by framework. subId = " + subscriptionId);
+        return false;
+    }
+
+    private ImsMmTelManager getImsMmTelManager(int subId) {
+        if (!SubscriptionManager.isUsableSubscriptionId(subId)) {
+            return null;
+        }
+        ImsManager imsMgr = mContext.getSystemService(ImsManager.class);
+        return (imsMgr == null) ? null : imsMgr.getImsMmTelManager(subId);
+    }
+
+    private SubscriptionInfo getSubscriptionInfoFromList(
+            List<SubscriptionInfo> subInfoList, int subId) {
+        for (SubscriptionInfo subInfo : subInfoList) {
+            if ((subInfo != null) && (subInfo.getSubscriptionId() == subId)) {
+                return subInfo;
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_PREFERENCE_BACKUPCALLING_GROUP;
+    }
+
+    @Override
+    public void onAirplaneModeChanged(boolean airplaneModeEnabled) {}
+
+    @Override
+    public void onSubscriptionsChanged() {
+        SubscriptionManager subscriptionManager =
+                mContext.getSystemService(SubscriptionManager.class);
+        mSubInfoListForBackupCall = SubscriptionUtil.getActiveSubscriptions(subscriptionManager);
+        update();
+    }
+}
diff --git a/src/com/android/settings/network/telephony/NetworkProviderBackupCallingPreferenceController.java b/src/com/android/settings/network/telephony/NetworkProviderBackupCallingPreferenceController.java
index b66cea6..5c336ef 100644
--- a/src/com/android/settings/network/telephony/NetworkProviderBackupCallingPreferenceController.java
+++ b/src/com/android/settings/network/telephony/NetworkProviderBackupCallingPreferenceController.java
@@ -20,10 +20,8 @@
 import android.telephony.SubscriptionInfo;
 import android.telephony.SubscriptionManager;
 
-import androidx.preference.Preference;
 import androidx.preference.PreferenceCategory;
 import androidx.preference.PreferenceScreen;
-import androidx.preference.SwitchPreference;
 
 import com.android.settings.core.BasePreferenceController;
 import com.android.settings.network.SubscriptionUtil;
@@ -31,8 +29,6 @@
 import com.android.settingslib.core.lifecycle.LifecycleObserver;
 
 import java.util.List;
-import java.util.Objects;
-import java.util.stream.Collectors;
 
 /**
  * Preference controller for "Backup Calling" summary list
@@ -41,16 +37,24 @@
         BasePreferenceController implements LifecycleObserver {
 
     private static final String TAG = "NetProvBackupCallingCtrl";
+    private static final String KEY_PREFERENCE_CATEGORY = "provider_model_backup_calling_category";
 
-    private Context mContext;
     private PreferenceCategory mPreferenceCategory;
+    private PreferenceScreen mPreferenceScreen;
+    private NetworkProviderBackupCallingGroup mNetworkProviderBackupCallingGroup;
+    private List<SubscriptionInfo> mSubscriptionList;
 
     /**
      * Preference controller for "Backup Calling" summary list
      */
     public NetworkProviderBackupCallingPreferenceController(Context context, String key) {
         super(context, key);
-        mContext = context;
+    }
+
+    protected NetworkProviderBackupCallingGroup createBackupCallingControllerForSub(
+            Lifecycle lifecycle, List<SubscriptionInfo> subscriptionList) {
+        return new NetworkProviderBackupCallingGroup(mContext, lifecycle, subscriptionList,
+                KEY_PREFERENCE_CATEGORY);
     }
 
     /**
@@ -59,73 +63,34 @@
      * @param lifecycle Lifecycle of UI which owns this Preference
      */
     public void init(Lifecycle lifecycle) {
-        lifecycle.addObserver(this);
+        mSubscriptionList = getActiveSubscriptionList();
+        mNetworkProviderBackupCallingGroup = createBackupCallingControllerForSub(lifecycle,
+                mSubscriptionList);
+    }
+
+    private List<SubscriptionInfo> getActiveSubscriptionList() {
+        SubscriptionManager subscriptionManager =
+                mContext.getSystemService(SubscriptionManager.class);
+        return SubscriptionUtil.getActiveSubscriptions(subscriptionManager);
     }
 
     @Override
     public int getAvailabilityStatus() {
-        List<SubscriptionInfo> subList = getActiveSubscriptions();
-        if (subList.size() < 2) {
+        if (mNetworkProviderBackupCallingGroup == null
+                || mSubscriptionList == null
+                || mSubscriptionList.size() < 2) {
             return CONDITIONALLY_UNAVAILABLE;
+        } else {
+            return AVAILABLE;
         }
-        return (getPreferences(subList).size() >= 1) ? AVAILABLE : CONDITIONALLY_UNAVAILABLE;
     }
 
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
-
-        PreferenceCategory prefCategory = screen.findPreference(getPreferenceKey());
-        updatePreferenceList(prefCategory);
-        prefCategory.setVisible(isAvailable());
-    }
-
-    @Override
-    public void updateState(Preference preference) {
-        super.updateState(preference);
-        // Do nothing in this case since preference is invisible
-        if (preference == null) {
-            return;
-        }
-        updatePreferenceList((PreferenceCategory) preference);
-    }
-
-    private String getPreferenceKey(int subscriptionId) {
-        return getPreferenceKey() + "_subId_" + subscriptionId;
-    }
-
-    private SwitchPreference getPreference(SubscriptionInfo subInfo) {
-        int subId = subInfo.getSubscriptionId();
-        BackupCallingPreferenceController prefCtrl =
-                new BackupCallingPreferenceController(mContext, getPreferenceKey(subId));
-        prefCtrl.init(subId);
-        if (prefCtrl.getAvailabilityStatus(subId) != BasePreferenceController.AVAILABLE) {
-            return null;
-        }
-        SwitchPreference pref = new SwitchPreference(mContext);
-        prefCtrl.updateState(pref);
-        pref.setTitle(SubscriptionUtil.getUniqueSubscriptionDisplayName(subInfo, mContext));
-        return pref;
-    }
-
-    private List<SwitchPreference> getPreferences(List<SubscriptionInfo> subList) {
-        return subList.stream()
-                .map(subInfo -> getPreference(subInfo))
-                .filter(Objects::nonNull)
-                .collect(Collectors.toList());
-    }
-
-    private List<SubscriptionInfo> getActiveSubscriptions() {
-        return SubscriptionUtil.getActiveSubscriptions(
-                mContext.getSystemService(SubscriptionManager.class));
-    }
-
-    private void updatePreferenceList(PreferenceCategory prefCategory) {
-        List<SwitchPreference> prefList = getPreferences(getActiveSubscriptions());
-
-        prefCategory.removeAll();
-        for (SwitchPreference pref : prefList) {
-            prefCategory.addPreference(pref);
-        }
+        mPreferenceScreen = screen;
+        mPreferenceCategory = screen.findPreference(KEY_PREFERENCE_CATEGORY);
+        mPreferenceCategory.setVisible(isAvailable());
+        mNetworkProviderBackupCallingGroup.displayPreference(screen);
     }
 }
diff --git a/tests/unit/src/com/android/settings/network/telephony/NetworkProviderBackupCallingGroupTest.java b/tests/unit/src/com/android/settings/network/telephony/NetworkProviderBackupCallingGroupTest.java
new file mode 100644
index 0000000..e7a6af3
--- /dev/null
+++ b/tests/unit/src/com/android/settings/network/telephony/NetworkProviderBackupCallingGroupTest.java
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2021 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.network.telephony;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.os.Looper;
+import android.os.PersistableBundle;
+import android.telephony.CarrierConfigManager;
+import android.telephony.SubscriptionInfo;
+import android.telephony.SubscriptionManager;
+import android.telephony.TelephonyManager;
+import android.util.FeatureFlagUtils;
+import android.util.Log;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceGroup;
+import androidx.preference.PreferenceManager;
+import androidx.preference.PreferenceScreen;
+import androidx.preference.SwitchPreference;
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.android.settings.network.CarrierWifiTogglePreferenceController;
+import com.android.settings.testutils.ResourcesUtils;
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.List;
+
+@RunWith(AndroidJUnit4.class)
+public class NetworkProviderBackupCallingGroupTest {
+
+    private static final int SUB_ID_1 = 1;
+    private static final int SUB_ID_2 = 2;
+
+    private static final String KEY_PREFERENCE_CATEGORY_BACKUP_CALLING =
+            "provider_model_backup_calling_category";
+    private static final String DISPLAY_NAME_1 = "Test Display Name 1";
+    private static final String DISPLAY_NAME_2 = "Test Display Name 2";
+
+    @Mock
+    private PreferenceGroup mPreferenceGroup;
+    @Mock
+    private CarrierConfigManager mCarrierConfigManager;
+    @Mock
+    private Lifecycle mLifecycle;
+    @Mock
+    private SubscriptionManager mSubscriptionManager;
+    @Mock
+    private SubscriptionInfo mSubscriptionInfo1;
+    @Mock
+    private SubscriptionInfo mSubscriptionInfo2;
+    @Mock
+    private List<SubscriptionInfo> mSubscriptionInfoList;
+    @Mock
+    private TelephonyManager mTelephonyManager1;
+    @Mock
+    private TelephonyManager mTelephonyManager2;
+
+    @Mock
+    private NetworkProviderBackupCallingGroup mNetworkProviderBackupCallingGroup;
+    private Context mContext;
+    private PersistableBundle mCarrierConfig;
+    private PreferenceManager mPreferenceManager;
+    private PreferenceScreen mPreferenceScreen;
+    private SwitchPreference mSwitchPreference1;
+    private SwitchPreference mSwitchPreference2;
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+        mContext = spy(ApplicationProvider.getApplicationContext());
+        when(mContext.getSystemService(TelephonyManager.class)).thenReturn(mTelephonyManager1);
+        when(mTelephonyManager1.createForSubscriptionId(SUB_ID_1)).thenReturn(mTelephonyManager1);
+        when(mContext.getSystemService(TelephonyManager.class)).thenReturn(mTelephonyManager2);
+        when(mTelephonyManager2.createForSubscriptionId(SUB_ID_2)).thenReturn(mTelephonyManager2);
+        when(mContext.getSystemService(SubscriptionManager.class)).thenReturn(mSubscriptionManager);
+        when(mSubscriptionInfo1.getSubscriptionId()).thenReturn(SUB_ID_1);
+        when(mSubscriptionInfo1.getDisplayName()).thenReturn(DISPLAY_NAME_1);
+        doReturn(true).when(mNetworkProviderBackupCallingGroup).isCrossSimEnabledByPlatform(
+                mContext, SUB_ID_1);
+        mSubscriptionInfoList.add(mSubscriptionInfo1);
+        when(mSubscriptionInfo2.getSubscriptionId()).thenReturn(SUB_ID_2);
+        when(mSubscriptionInfo2.getDisplayName()).thenReturn(DISPLAY_NAME_2);
+        doReturn(true).when(mNetworkProviderBackupCallingGroup).isCrossSimEnabledByPlatform(
+                mContext, SUB_ID_2);
+        mSubscriptionInfoList.add(mSubscriptionInfo2);
+        when(mSubscriptionManager.getActiveSubscriptionInfoList()).thenReturn(
+                mSubscriptionInfoList);
+
+        mCarrierConfig = new PersistableBundle();
+        doReturn(mCarrierConfig).when(mCarrierConfigManager).getConfigForSubId(SUB_ID_1);
+        mCarrierConfig.putBoolean(CarrierConfigManager.KEY_CARRIER_CROSS_SIM_IMS_AVAILABLE_BOOL,
+                true);
+        doReturn(mCarrierConfig).when(mCarrierConfigManager).getConfigForSubId(SUB_ID_2);
+        mCarrierConfig.putBoolean(CarrierConfigManager.KEY_CARRIER_CROSS_SIM_IMS_AVAILABLE_BOOL,
+                true);
+
+        if (Looper.myLooper() == null) {
+            Looper.prepare();
+        }
+
+        mPreferenceManager = new PreferenceManager(mContext);
+        mPreferenceScreen = mPreferenceManager.createPreferenceScreen(mContext);
+        when(mPreferenceGroup.getKey()).thenReturn(KEY_PREFERENCE_CATEGORY_BACKUP_CALLING);
+        when(mPreferenceGroup.getPreferenceCount()).thenReturn(2);
+        mPreferenceScreen.addPreference(mPreferenceGroup);
+
+        mNetworkProviderBackupCallingGroup = spy(new NetworkProviderBackupCallingGroup(
+                mContext, mLifecycle, mSubscriptionInfoList,
+                KEY_PREFERENCE_CATEGORY_BACKUP_CALLING));
+    }
+
+    @Test
+    public void shouldShowBackupCallingForSub_invalidSubId_returnFalse() {
+        assertThat(mNetworkProviderBackupCallingGroup.hasBackupCallingFeature(
+                SubscriptionManager.INVALID_SUBSCRIPTION_ID)).isEqualTo(false);
+    }
+
+    @Test
+    public void shouldShowBackupCallingForSub_carrierConfigIsUnavailable_returnFalse() {
+        mCarrierConfig.putBoolean(CarrierConfigManager.KEY_CARRIER_CROSS_SIM_IMS_AVAILABLE_BOOL,
+                false);
+
+        assertThat(mNetworkProviderBackupCallingGroup.hasBackupCallingFeature(SUB_ID_1))
+                .isEqualTo(false);
+    }
+
+    @Test
+    public void
+    shouldShowBackupCallingForSub_crossSimDisabled_returnFalse() {
+        FeatureFlagUtils.setEnabled(mContext, FeatureFlagUtils.SETTINGS_PROVIDER_MODEL, true);
+        doReturn(false).when(mNetworkProviderBackupCallingGroup).isCrossSimEnabledByPlatform(
+                mContext, SUB_ID_1);
+
+        assertThat(mNetworkProviderBackupCallingGroup.hasBackupCallingFeature(SUB_ID_1))
+                .isEqualTo(false);
+    }
+
+    @Test
+    public void shouldBackupCallingForSub_crossSimEnabled_returnTrue() {
+        FeatureFlagUtils.setEnabled(mContext, FeatureFlagUtils.SETTINGS_PROVIDER_MODEL, true);
+        doReturn(true).when(mNetworkProviderBackupCallingGroup).isCrossSimEnabledByPlatform(
+                mContext, SUB_ID_1);
+
+        assertThat(mNetworkProviderBackupCallingGroup.hasBackupCallingFeature(SUB_ID_1))
+                .isEqualTo(true);
+    }
+}