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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "base/basictypes.h" | |
6 #include "base/chromeos/memory_pressure_monitor.h" | |
7 #include "base/memory/memory_pressure_listener.h" | |
8 #include "base/message_loop/message_loop.h" | |
9 #include "testing/gtest/include/gtest/gtest.h" | |
10 | |
11 namespace base { | |
12 namespace chromeos { | |
13 | |
14 namespace { | |
15 | |
16 // True if the memory notifier got called. | |
17 // Do not read/modify value directly. | |
18 bool on_memory_pressure_called = false; | |
19 | |
20 // If the memory notifier got called, this is the memory pressure reported. | |
21 MemoryPressureListener::MemoryPressureLevel on_memory_pressure_level = | |
22 MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE; | |
23 | |
24 // Processes OnMemoryPressure calls. | |
25 void OnMemoryPressure(MemoryPressureListener::MemoryPressureLevel level) { | |
26 on_memory_pressure_called = true; | |
27 on_memory_pressure_level = level; | |
28 } | |
29 | |
30 // Resets the indicator for memory pressure. | |
31 void ResetOnMemoryPressureCalled() { | |
32 on_memory_pressure_called = false; | |
33 } | |
34 | |
35 // Returns true when OnMemoryPressure was called (and resets it). | |
36 bool WasOnMemoryPressureCalled() { | |
37 bool b = on_memory_pressure_called; | |
38 ResetOnMemoryPressureCalled(); | |
39 return b; | |
40 } | |
41 | |
42 } // namespace | |
43 | |
44 class TestMemoryPressureMonitor : public MemoryPressureMonitor { | |
45 public: | |
46 TestMemoryPressureMonitor() | |
47 : MemoryPressureMonitor(THRESHOLD_DEFAULT), | |
48 memory_in_percent_override_(0) { | |
49 // Disable any timers which are going on and set a special memory reporting | |
50 // function. | |
51 StopObserving(); | |
52 } | |
53 ~TestMemoryPressureMonitor() override {} | |
54 | |
55 void SetMemoryInPercentOverride(int percent) { | |
56 memory_in_percent_override_ = percent; | |
57 } | |
58 | |
59 void CheckMemoryPressureForTest() { | |
60 CheckMemoryPressure(); | |
61 } | |
62 | |
63 private: | |
64 int GetUsedMemoryInPercent() override { | |
65 return memory_in_percent_override_; | |
66 } | |
67 | |
68 int memory_in_percent_override_; | |
69 DISALLOW_COPY_AND_ASSIGN(TestMemoryPressureMonitor); | |
70 }; | |
71 | |
72 // This test tests the various transition states from memory pressure, looking | |
73 // for the correct behavior on event reposting as well as state updates. | |
74 TEST(ChromeOSMemoryPressureMonitorTest, CheckMemoryPressure) { | |
75 base::MessageLoopForUI message_loop; | |
76 scoped_ptr<TestMemoryPressureMonitor> monitor( | |
77 new TestMemoryPressureMonitor); | |
78 scoped_ptr<MemoryPressureListener> listener( | |
79 new MemoryPressureListener(base::Bind(&OnMemoryPressure))); | |
80 // Checking the memory pressure while 0% are used should not produce any | |
81 // events. | |
82 monitor->SetMemoryInPercentOverride(0); | |
83 ResetOnMemoryPressureCalled(); | |
84 | |
85 monitor->CheckMemoryPressureForTest(); | |
86 message_loop.RunUntilIdle(); | |
87 EXPECT_FALSE(WasOnMemoryPressureCalled()); | |
88 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE, | |
89 monitor->GetCurrentPressureLevel()); | |
90 | |
91 // Setting the memory level to 80% should produce a moderate pressure level. | |
92 monitor->SetMemoryInPercentOverride(80); | |
93 monitor->CheckMemoryPressureForTest(); | |
94 message_loop.RunUntilIdle(); | |
95 EXPECT_TRUE(WasOnMemoryPressureCalled()); | |
96 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE, | |
97 monitor->GetCurrentPressureLevel()); | |
98 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE, | |
99 on_memory_pressure_level); | |
100 | |
101 // We need to check that the event gets reposted after a while. | |
102 int i = 0; | |
103 for (; i < 100; i++) { | |
104 monitor->CheckMemoryPressureForTest(); | |
105 message_loop.RunUntilIdle(); | |
106 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE, | |
107 monitor->GetCurrentPressureLevel()); | |
108 if (WasOnMemoryPressureCalled()) { | |
109 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE, | |
110 on_memory_pressure_level); | |
111 break; | |
112 } | |
113 } | |
114 // Should be more then 5 and less then 100. | |
115 EXPECT_LE(5, i); | |
116 EXPECT_GE(99, i); | |
117 | |
118 // Setting the memory usage to 99% should produce critical levels. | |
119 monitor->SetMemoryInPercentOverride(99); | |
120 monitor->CheckMemoryPressureForTest(); | |
121 message_loop.RunUntilIdle(); | |
122 EXPECT_TRUE(WasOnMemoryPressureCalled()); | |
123 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL, | |
124 on_memory_pressure_level); | |
125 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL, | |
126 monitor->GetCurrentPressureLevel()); | |
127 | |
128 // Calling it again should immediately produce a second call. | |
129 monitor->CheckMemoryPressureForTest(); | |
130 message_loop.RunUntilIdle(); | |
131 EXPECT_TRUE(WasOnMemoryPressureCalled()); | |
132 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL, | |
133 on_memory_pressure_level); | |
134 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL, | |
135 monitor->GetCurrentPressureLevel()); | |
136 | |
137 // When lowering the pressure again we should not get an event, but the | |
138 // pressure should go back to moderate. | |
139 monitor->SetMemoryInPercentOverride(80); | |
140 monitor->CheckMemoryPressureForTest(); | |
141 message_loop.RunUntilIdle(); | |
142 EXPECT_FALSE(WasOnMemoryPressureCalled()); | |
143 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE, | |
144 monitor->GetCurrentPressureLevel()); | |
145 | |
146 // We should need exactly the same amount of calls as before, before the next | |
147 // call comes in. | |
148 int j = 0; | |
149 for (; j < 100; j++) { | |
150 monitor->CheckMemoryPressureForTest(); | |
151 message_loop.RunUntilIdle(); | |
152 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE, | |
153 monitor->GetCurrentPressureLevel()); | |
154 if (WasOnMemoryPressureCalled()) { | |
155 EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE, | |
156 on_memory_pressure_level); | |
157 break; | |
158 } | |
159 } | |
160 // We should have needed exactly the same amount of checks as before. | |
161 EXPECT_EQ(j, i); | |
162 } | |
163 | |
164 } // namespace chromeos | |
165 } // namespace base | |
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