1/*
2 * Copyright (C) 2017 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
17package com.android.systemui.util.leak;
18
19import static org.mockito.ArgumentMatchers.anyInt;
20import static org.mockito.Mockito.mock;
21import static org.mockito.Mockito.never;
22import static org.mockito.Mockito.verify;
23import static org.mockito.Mockito.when;
24
25import android.content.Context;
26import android.os.Looper;
27import android.support.test.filters.SmallTest;
28import android.testing.AndroidTestingRunner;
29import android.testing.TestableLooper;
30import android.testing.TestableLooper.RunWithLooper;
31
32import com.android.systemui.SysuiTestCase;
33
34import org.junit.Before;
35import org.junit.Test;
36import org.junit.runner.RunWith;
37
38@SmallTest
39@RunWith(AndroidTestingRunner.class)
40@RunWithLooper
41public class GarbageMonitorTest extends SysuiTestCase {
42
43    private LeakReporter mLeakReporter;
44    private TrackedGarbage mTrackedGarbage;
45    private TestableGarbageMonitor mGarbageMonitor;
46
47    @Before
48    public void setup() {
49        mTrackedGarbage = mock(TrackedGarbage.class);
50        mLeakReporter = mock(LeakReporter.class);
51        mGarbageMonitor =
52                new TestableGarbageMonitor(
53                        mContext,
54                        TestableLooper.get(this).getLooper(),
55                        new LeakDetector(null, mTrackedGarbage, null),
56                        mLeakReporter);
57    }
58
59    @Test
60    public void testCallbacks_getScheduled() {
61        mGarbageMonitor.startLeakMonitor();
62        mGarbageMonitor.runCallbacksOnce();
63        mGarbageMonitor.runCallbacksOnce();
64        mGarbageMonitor.runCallbacksOnce();
65    }
66
67    @Test
68    public void testNoGarbage_doesntDump() {
69        when(mTrackedGarbage.countOldGarbage()).thenReturn(0);
70
71        mGarbageMonitor.startLeakMonitor();
72        mGarbageMonitor.runCallbacksOnce();
73        mGarbageMonitor.runCallbacksOnce();
74        mGarbageMonitor.runCallbacksOnce();
75
76        verify(mLeakReporter, never()).dumpLeak(anyInt());
77    }
78
79    @Test
80    public void testALittleGarbage_doesntDump() {
81        when(mTrackedGarbage.countOldGarbage()).thenReturn(4);
82
83        mGarbageMonitor.startLeakMonitor();
84        mGarbageMonitor.runCallbacksOnce();
85        mGarbageMonitor.runCallbacksOnce();
86        mGarbageMonitor.runCallbacksOnce();
87
88        verify(mLeakReporter, never()).dumpLeak(anyInt());
89    }
90
91    @Test
92    public void testTransientGarbage_doesntDump() {
93        when(mTrackedGarbage.countOldGarbage()).thenReturn(100);
94
95        mGarbageMonitor.startLeakMonitor();
96        mGarbageMonitor.runInspectCallback();
97
98        when(mTrackedGarbage.countOldGarbage()).thenReturn(0);
99
100        mGarbageMonitor.runReinspectCallback();
101
102        verify(mLeakReporter, never()).dumpLeak(anyInt());
103    }
104
105    @Test
106    public void testLotsOfPersistentGarbage_dumps() {
107        when(mTrackedGarbage.countOldGarbage()).thenReturn(100);
108
109        mGarbageMonitor.startLeakMonitor();
110        mGarbageMonitor.runCallbacksOnce();
111
112        verify(mLeakReporter).dumpLeak(anyInt());
113    }
114
115    private static class TestableGarbageMonitor extends GarbageMonitor {
116        public TestableGarbageMonitor(
117                Context context,
118                Looper looper,
119                LeakDetector leakDetector,
120                LeakReporter leakReporter) {
121            super(context, looper, leakDetector, leakReporter);
122        }
123
124        void runInspectCallback() {
125            startLeakMonitor();
126        }
127
128        void runReinspectCallback() {
129            reinspectGarbageAfterGc();
130        }
131
132        void runCallbacksOnce() {
133            // Note that TestableLooper doesn't currently support delayed messages so we need to run
134            // callbacks explicitly.
135            runInspectCallback();
136            runReinspectCallback();
137        }
138    }
139}