Merge "Fix for null pointer when launching Connected devices."

tests/robotests/src/com/android/settings/deviceinfo/UsbBackendTest.java

@@ -0,0 +1,60 @@
+/*
+ * 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.deviceinfo;
+
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.hardware.usb.UsbManager;
+
+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;
+
+import static org.mockito.Answers.RETURNS_DEEP_STUBS;
+import static org.mockito.Mockito.when;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class UsbBackendTest {
+
+    @Mock(answer = RETURNS_DEEP_STUBS)
+    private Context mContext;
+    @Mock
+    private UsbManager mUsbManager;
+    @Mock
+    private UsbBackend.UserRestrictionUtil mUserRestrictionUtil;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        when(mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_MIDI))
+            .thenReturn(true);
+        when((Object)mContext.getSystemService(UsbManager.class)).thenReturn(mUsbManager);
+    }
+
+    @Test
+    public void constructor_noUsbPort_shouldNotCrash() {
+        UsbBackend usbBackend = new UsbBackend(mContext, mUserRestrictionUtil);
+        // Should not crash
+    }
+}