1 /*
2  * Copyright 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.bluetooth.avrcp;
18 
19 import android.content.Context;
20 import android.media.session.MediaSession;
21 
22 import com.android.internal.annotations.VisibleForTesting;
23 
24 /**
25  * Provide a method to inject custom MediaController objects for testing. By using the factory
26  * methods instead of calling the constructor of MediaController directly, we can inject a custom
27  * MediaController that can be used with JUnit and Mockito to set expectations and validate
28  * behaviour in tests.
29  */
30 public final class MediaControllerFactory {
31     private static MediaController sInjectedController;
32 
wrap(android.media.session.MediaController delegate)33     static MediaController wrap(android.media.session.MediaController delegate) {
34         if (sInjectedController != null) return sInjectedController;
35         return (delegate != null) ? new MediaController(delegate) : null;
36     }
37 
make(Context context, MediaSession.Token token)38     static MediaController make(Context context, MediaSession.Token token) {
39         if (sInjectedController != null) return sInjectedController;
40         return new MediaController(context, token);
41     }
42 
43     @VisibleForTesting
inject(MediaController controller)44     static void inject(MediaController controller) {
45         sInjectedController = controller;
46     }
47 }
48