1 /**
2  * Copyright (C) 2020 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.providers.media.tests.utils;
18 
19 import android.os.Bundle;
20 import android.os.SystemClock;
21 
22 import android.util.Log;
23 
24 import androidx.test.InstrumentationRegistry;
25 
26 import java.util.concurrent.TimeUnit;
27 
28 /**
29  * General Timer function for MediaProvider tests.
30  */
31 public class Timer {
32     private static final String TAG = "Timer";
33 
34     private final String name;
35     private int count;
36     private long duration;
37     private long start;
38     private long maxRunDuration = 0;
39 
Timer(String name)40     public Timer(String name) {
41         this.name = name;
42     }
43 
start()44     public void start() {
45         if (start != 0) {
46             throw new IllegalStateException();
47         } else {
48             start = SystemClock.elapsedRealtimeNanos();
49         }
50     }
51 
stop()52     public void stop() {
53         long currentRunDuration = 0;
54         if (start == 0) {
55             throw new IllegalStateException();
56         } else {
57             currentRunDuration = (SystemClock.elapsedRealtimeNanos() - start);
58             maxRunDuration = (currentRunDuration > maxRunDuration) ? currentRunDuration :
59                 maxRunDuration;
60             duration += currentRunDuration;
61             start = 0;
62             count++;
63         }
64     }
65 
getAverageDurationMillis()66     public long getAverageDurationMillis() {
67         return TimeUnit.MILLISECONDS.convert(duration / count, TimeUnit.NANOSECONDS);
68     }
69 
getMaxDurationMillis()70     public long getMaxDurationMillis() {
71         return TimeUnit.MILLISECONDS.convert(maxRunDuration, TimeUnit.NANOSECONDS);
72     }
73 
dumpResults()74     public void dumpResults() {
75         final long duration = getAverageDurationMillis();
76         Log.v(TAG, name + ": " + duration + "ms");
77 
78         final Bundle results = new Bundle();
79         results.putLong(name, duration);
80         InstrumentationRegistry.getInstrumentation().sendStatus(0, results);
81     }
82 }
83