[Settings] Avoid rename inactive subscription from NullPointerException

1. Init instance before accessing it
2. Re-enable test case

Bug: 147321836
Test: m RunSettingsRoboTests -j ROBOTEST_FILTER=RenameMobileNetworkDialogFragmentTest
Change-Id: I2375043f16b5a25372af5c9f413fb8384850316c
Merged-In: Ifc245bec739b4c81d2cee04b091bcdb54d567d4a
diff --git a/src/com/android/settings/network/telephony/RenameMobileNetworkDialogFragment.java b/src/com/android/settings/network/telephony/RenameMobileNetworkDialogFragment.java
index 38db43e..fa5deab 100644
--- a/src/com/android/settings/network/telephony/RenameMobileNetworkDialogFragment.java
+++ b/src/com/android/settings/network/telephony/RenameMobileNetworkDialogFragment.java
@@ -39,15 +39,17 @@
 import android.widget.Spinner;
 import android.widget.TextView;
 
-import com.android.settings.R;
-import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
-import com.android.settingslib.DeviceInfoUtils;
-
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 import androidx.appcompat.app.AlertDialog;
 
+import com.android.settings.R;
+import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
+import com.android.settingslib.DeviceInfoUtils;
+
+import java.util.List;
+
 /**
  * A dialog allowing the display name of a mobile network subscription to be changed
  */
@@ -115,9 +117,9 @@
                 .setPositiveButton(R.string.mobile_network_sim_name_rename, (dialog, which) -> {
                     mSubscriptionManager.setDisplayName(mNameView.getText().toString(), mSubId,
                             SubscriptionManager.NAME_SOURCE_USER_INPUT);
-                    mSubscriptionManager.setIconTint(
-                            mColors[mColorSpinner.getSelectedItemPosition()].getColor(),
-                            mSubId);
+                    final Color color = (mColorSpinner == null) ? mColors[0]
+                            : mColors[mColorSpinner.getSelectedItemPosition()];
+                    mSubscriptionManager.setIconTint(color.getColor(), mSubId);
                 })
                 .setNegativeButton(android.R.string.cancel, null);
         return builder.create();
@@ -126,7 +128,17 @@
     @VisibleForTesting
     protected void populateView(View view) {
         mNameView = view.findViewById(R.id.name_edittext);
-        final SubscriptionInfo info = mSubscriptionManager.getActiveSubscriptionInfo(mSubId);
+        SubscriptionInfo info = null;
+        final List<SubscriptionInfo> infoList = mSubscriptionManager
+                .getAvailableSubscriptionInfoList();
+        if (infoList != null) {
+            for (SubscriptionInfo subInfo : infoList) {
+                if (subInfo.getSubscriptionId() == mSubId) {
+                    info = subInfo;
+                    break;
+                }
+            }
+        }
         if (info == null) {
             Log.w(TAG, "got null SubscriptionInfo for mSubId:" + mSubId);
             return;
diff --git a/tests/robotests/src/com/android/settings/network/telephony/RenameMobileNetworkDialogFragmentTest.java b/tests/robotests/src/com/android/settings/network/telephony/RenameMobileNetworkDialogFragmentTest.java
index 0d94928..b406986 100644
--- a/tests/robotests/src/com/android/settings/network/telephony/RenameMobileNetworkDialogFragmentTest.java
+++ b/tests/robotests/src/com/android/settings/network/telephony/RenameMobileNetworkDialogFragmentTest.java
@@ -23,12 +23,12 @@
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.doReturn;
-import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import android.content.Context;
 import android.content.DialogInterface;
 import android.graphics.Color;
 import android.telephony.ServiceState;
@@ -55,7 +55,13 @@
 import org.mockito.MockitoAnnotations;
 import org.robolectric.Robolectric;
 import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
+import org.robolectric.shadow.api.Shadow;
+import org.robolectric.shadows.ShadowTelephonyManager;
+
+import java.util.ArrayList;
+import java.util.List;
 
 @RunWith(RobolectricTestRunner.class)
 @Config(shadows = ShadowAlertDialogCompat.class)
@@ -64,6 +70,8 @@
     @Mock
     private TelephonyManager mTelephonyMgr;
     @Mock
+    private ServiceState mServiceState;
+    @Mock
     private SubscriptionManager mSubscriptionMgr;
     @Mock
     private SubscriptionInfo mSubscriptionInfo;
@@ -71,23 +79,35 @@
     private FragmentActivity mActivity;
     private RenameMobileNetworkDialogFragment mFragment;
     private int mSubscriptionId = 1234;
+    private List<SubscriptionInfo> mSubscriptionInfoList;
 
     @Before
     public void setUp() {
         MockitoAnnotations.initMocks(this);
-        mActivity = spy(Robolectric.buildActivity(FragmentActivity.class).setup().get());
+
+        Context context = spy(RuntimeEnvironment.application);
+
+        final ShadowTelephonyManager stm = Shadow.extract(context.getSystemService(
+                TelephonyManager.class));
+        stm.setTelephonyManagerForSubscriptionId(mSubscriptionId, mTelephonyMgr);
+        when(mTelephonyMgr.createForSubscriptionId(anyInt())).thenReturn(mTelephonyMgr);
+
+        when(mTelephonyMgr.getServiceState()).thenReturn(mServiceState);
+        when(mServiceState.getOperatorAlphaLong()).thenReturn("fake carrier name");
 
         when(mSubscriptionInfo.getSubscriptionId()).thenReturn(mSubscriptionId);
         when(mSubscriptionInfo.getDisplayName()).thenReturn("test");
+        when(mSubscriptionMgr.setDisplayName(any(), anyInt(), anyInt())).thenReturn(0);
+
+        mActivity = spy(Robolectric.buildActivity(FragmentActivity.class).setup().get());
 
         mFragment = spy(RenameMobileNetworkDialogFragment.newInstance(mSubscriptionId));
-        doReturn(mTelephonyMgr).when(mFragment).getTelephonyManager(any());
         doReturn(mSubscriptionMgr).when(mFragment).getSubscriptionManager(any());
 
-        final ServiceState serviceState = mock(ServiceState.class);
-        when(serviceState.getOperatorAlphaLong()).thenReturn("fake carrier name");
-        when(mTelephonyMgr.createForSubscriptionId(anyInt())).thenReturn(mTelephonyMgr);
-        when(mTelephonyMgr.getServiceState()).thenReturn(serviceState);
+        mSubscriptionInfoList = new ArrayList<SubscriptionInfo>();
+        mSubscriptionInfoList.add(mSubscriptionInfo);
+        when(mSubscriptionMgr.getAvailableSubscriptionInfoList()).thenReturn(
+                mSubscriptionInfoList);
     }
 
     @Test
@@ -100,8 +120,6 @@
 
     @Test
     public void dialog_cancelButtonClicked_setDisplayNameAndIconTintNotCalled() {
-        when(mSubscriptionMgr.getActiveSubscriptionInfo(mSubscriptionId)).thenReturn(
-                mSubscriptionInfo);
         final AlertDialog dialog = startDialog();
         final EditText nameView = mFragment.getNameView();
         nameView.setText("test2");
@@ -115,9 +133,6 @@
 
     @Test
     public void dialog_saveButtonClicked_setDisplayNameAndIconTint() {
-        when(mSubscriptionMgr.getActiveSubscriptionInfo(mSubscriptionId)).thenReturn(
-                mSubscriptionInfo);
-
         final AlertDialog dialog = startDialog();
         final EditText nameView = mFragment.getNameView();
         nameView.setText("test2");
@@ -140,8 +155,6 @@
     public void populateView_infoIsOpportunistic_hideNumberLabel() {
         final View view = LayoutInflater.from(mActivity).inflate(
                 R.layout.dialog_mobile_network_rename, null);
-        when(mSubscriptionMgr.getActiveSubscriptionInfo(mSubscriptionId)).thenReturn(
-                mSubscriptionInfo);
         when(mSubscriptionInfo.isOpportunistic()).thenReturn(true);
 
         startDialog();