1 /*
2  * Copyright (C) 2019 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.systemui.util.time;
18 
19 /**
20  * Testable wrapper around {@link android.os.SystemClock}.
21  *
22  * Dagger can inject this wrapper into your classes. The implementation just proxies calls to the
23  * real SystemClock.
24  *
25  * In tests, pass an instance of FakeSystemClock, which allows you to control the values returned by
26  * the various getters below.
27  */
28 public interface SystemClock {
29     /** @see android.os.SystemClock#uptimeMillis() */
uptimeMillis()30     long uptimeMillis();
31 
32     /** @see android.os.SystemClock#elapsedRealtime() */
elapsedRealtime()33     long elapsedRealtime();
34 
35     /** @see android.os.SystemClock#elapsedRealtimeNanos() */
elapsedRealtimeNanos()36     long elapsedRealtimeNanos();
37 
38     /** @see android.os.SystemClock#currentThreadTimeMillis() */
currentThreadTimeMillis()39     long currentThreadTimeMillis();
40 
41     /** @see System#currentTimeMillis()  */
currentTimeMillis()42     long currentTimeMillis();
43 }
44