Don't show vpn info box when we don't have anything useful

Change-Id: I12a71b38486cab8a6a188c299e90a7674926dc98
Fix: 36068109
Test: make RunSettingsRoboTests -j40

src/com/android/settings/vpn2/AppDialogFragment.java

@@ -18,7 +18,6 @@ package com.android.settings.vpn2;
 
 import android.app.AlertDialog;
 import android.app.Dialog;
-import android.app.DialogFragment;
 import android.app.Fragment;
 import android.content.Context;
 import android.content.DialogInterface;
@@ -67,13 +66,18 @@ public class AppDialogFragment extends InstrumentedDialogFragment implements App
 
     public static void show(Fragment parent, PackageInfo packageInfo, String label,
             boolean managing, boolean connected) {
+        if (!managing && !connected) {
+            // We can't display anything useful for this case.
+            return;
+        }
         show(parent, null, packageInfo, label, managing, connected);
     }
 
     public static void show(Fragment parent, Listener listener, PackageInfo packageInfo,
             String label, boolean managing, boolean connected) {
-        if (!parent.isAdded())
+        if (!parent.isAdded()) {
             return;
+        }
 
         Bundle args = new Bundle();
         args.putParcelable(ARG_PACKAGE, packageInfo);
@@ -100,7 +104,7 @@ public class AppDialogFragment extends InstrumentedDialogFragment implements App
         final String label = args.getString(ARG_LABEL);
         boolean managing = args.getBoolean(ARG_MANAGING);
         boolean connected = args.getBoolean(ARG_CONNECTED);
-        mPackageInfo = (PackageInfo) args.getParcelable(ARG_PACKAGE);
+        mPackageInfo = args.getParcelable(ARG_PACKAGE);
 
         if (managing) {
             return new AppDialog(getActivity(), this, mPackageInfo, label);

tests/robotests/src/com/android/settings/vpn2/AppDialogFragmentTest.java

@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2017 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.vpn2;
+
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+
+import android.app.Fragment;
+import android.content.pm.PackageInfo;
+
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class AppDialogFragmentTest {
+
+    @Mock
+    private Fragment mParent;
+
+    private PackageInfo mPackageInfo;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mPackageInfo = new PackageInfo();
+    }
+
+    @Test
+    public void notManagingOrConnected_shouldNotShow() {
+        AppDialogFragment.show(mParent, mPackageInfo, "label", false /* manage */,
+                false /* connected */);
+
+        verify(mParent, never()).isAdded();
+    }
+
+    @Test
+    public void notManagingAndConnected_showShow() {
+        AppDialogFragment.show(mParent, mPackageInfo, "label", false /* manage */,
+                true /* connected */);
+
+        verify(mParent).isAdded();
+    }
+}