1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/cronet/host_cache_persistence_manager.h"
#include "base/test/scoped_mock_time_message_loop_task_runner.h"
#include "base/test/task_environment.h"
#include "base/values.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/testing_pref_service.h"
#include "net/base/ip_endpoint.h"
#include "net/base/net_errors.h"
#include "net/base/network_isolation_key.h"
#include "net/dns/host_cache.h"
#include "net/dns/public/dns_query_type.h"
#include "net/dns/public/host_resolver_source.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace cronet {
class HostCachePersistenceManagerTest : public testing::Test {
protected:
void SetUp() override {
cache_ = std::make_unique<net::HostCache>(/*max_entries=*/1000);
pref_service_ = std::make_unique<TestingPrefServiceSimple>();
pref_service_->registry()->RegisterListPref(kPrefName);
}
void MakePersistenceManager(base::TimeDelta delay) {
persistence_manager_ = std::make_unique<HostCachePersistenceManager>(
cache_.get(), pref_service_.get(), kPrefName, delay, nullptr);
}
// Sets an entry in the HostCache in order to trigger a pref write. The
// caller is responsible for making sure this is a change that will trigger
// a write, and the HostCache's interaction with its PersistenceDelegate is
// assumed to work (it's tested in net/dns/host_cache_unittest.cc).
void WriteToCache(const std::string& host) {
net::HostCache::Key key(host, net::DnsQueryType::UNSPECIFIED, 0,
net::HostResolverSource::ANY,
net::NetworkAnonymizationKey());
net::HostCache::Entry entry(net::OK, /*ip_endpoints=*/{}, /*aliases=*/{},
net::HostCache::Entry::SOURCE_UNKNOWN);
cache_->Set(key, entry, base::TimeTicks::Now(), base::Seconds(1));
}
// Reads the current value of the pref from the TestingPrefServiceSimple
// and deserializes it into a temporary new HostCache. Only checks the size,
// not the full contents, since the tests in this file are only intended
// to test that writes happen when they're supposed to, not serialization
// correctness.
void CheckPref(size_t expected_size) {
const base::Value* value = pref_service_->GetUserPref(kPrefName);
net::HostCache temp_cache(10);
if (value)
temp_cache.RestoreFromListValue(value->GetList());
ASSERT_EQ(expected_size, temp_cache.size());
}
// Generates a temporary HostCache with a few entries and uses it to
// initialize the value in prefs.
void InitializePref() {
net::HostCache temp_cache(10);
net::HostCache::Key key1("1.test", net::DnsQueryType::UNSPECIFIED, 0,
net::HostResolverSource::ANY,
net::NetworkAnonymizationKey());
net::HostCache::Key key2("2.test", net::DnsQueryType::UNSPECIFIED, 0,
net::HostResolverSource::ANY,
net::NetworkAnonymizationKey());
net::HostCache::Key key3("3.test", net::DnsQueryType::UNSPECIFIED, 0,
net::HostResolverSource::ANY,
net::NetworkAnonymizationKey());
net::HostCache::Entry entry(net::OK, /*ip_endpoints=*/{}, /*aliases=*/{},
net::HostCache::Entry::SOURCE_UNKNOWN);
temp_cache.Set(key1, entry, base::TimeTicks::Now(), base::Seconds(1));
temp_cache.Set(key2, entry, base::TimeTicks::Now(), base::Seconds(1));
temp_cache.Set(key3, entry, base::TimeTicks::Now(), base::Seconds(1));
base::Value::List list;
temp_cache.GetList(list, false /* include_stale */,
net::HostCache::SerializationType::kRestorable);
pref_service_->SetList(kPrefName, std::move(list));
}
static const char kPrefName[];
base::test::TaskEnvironment task_environment_;
base::ScopedMockTimeMessageLoopTaskRunner task_runner_;
// The HostCache and PrefService have to outlive the
// HostCachePersistenceManager.
std::unique_ptr<net::HostCache> cache_;
std::unique_ptr<TestingPrefServiceSimple> pref_service_;
std::unique_ptr<HostCachePersistenceManager> persistence_manager_;
};
const char HostCachePersistenceManagerTest::kPrefName[] = "net.test";
// Make a single change to the HostCache and make sure that it's written
// when the timer expires. Then repeat.
TEST_F(HostCachePersistenceManagerTest, SeparateWrites) {
MakePersistenceManager(base::Seconds(60));
WriteToCache("1.test");
task_runner_->FastForwardBy(base::Seconds(59));
CheckPref(0);
task_runner_->FastForwardBy(base::Seconds(1));
CheckPref(1);
WriteToCache("2.test");
task_runner_->FastForwardBy(base::Seconds(59));
CheckPref(1);
task_runner_->FastForwardBy(base::Seconds(1));
CheckPref(2);
}
// Write to the HostCache multiple times and make sure that all changes
// are written to prefs at the appropriate times.
TEST_F(HostCachePersistenceManagerTest, MultipleWrites) {
MakePersistenceManager(base::Seconds(300));
WriteToCache("1.test");
WriteToCache("2.test");
task_runner_->FastForwardBy(base::Seconds(299));
CheckPref(0);
task_runner_->FastForwardBy(base::Seconds(1));
CheckPref(2);
WriteToCache("3.test");
WriteToCache("4.test");
task_runner_->FastForwardBy(base::Seconds(299));
CheckPref(2);
task_runner_->FastForwardBy(base::Seconds(1));
CheckPref(4);
}
// Make changes to the HostCache at different times and ensure that the writes
// to prefs are batched as expected.
TEST_F(HostCachePersistenceManagerTest, BatchedWrites) {
MakePersistenceManager(base::Milliseconds(100));
WriteToCache("1.test");
task_runner_->FastForwardBy(base::Milliseconds(30));
WriteToCache("2.test");
task_runner_->FastForwardBy(base::Milliseconds(30));
WriteToCache("3.test");
CheckPref(0);
task_runner_->FastForwardBy(base::Milliseconds(40));
CheckPref(3);
// Add a delay in between batches.
task_runner_->FastForwardBy(base::Milliseconds(50));
WriteToCache("4.test");
task_runner_->FastForwardBy(base::Milliseconds(30));
WriteToCache("5.test");
task_runner_->FastForwardBy(base::Milliseconds(30));
WriteToCache("6.test");
CheckPref(3);
task_runner_->FastForwardBy(base::Milliseconds(40));
CheckPref(6);
}
// Set the pref before the HostCachePersistenceManager is created, and make
// sure it gets picked up by the HostCache.
TEST_F(HostCachePersistenceManagerTest, InitAfterPrefs) {
CheckPref(0);
InitializePref();
CheckPref(3);
MakePersistenceManager(base::Seconds(1));
task_runner_->RunUntilIdle();
ASSERT_EQ(3u, cache_->size());
}
// Set the pref after the HostCachePersistenceManager is created, and make
// sure it gets picked up by the HostCache.
TEST_F(HostCachePersistenceManagerTest, InitBeforePrefs) {
MakePersistenceManager(base::Seconds(1));
ASSERT_EQ(0u, cache_->size());
CheckPref(0);
InitializePref();
CheckPref(3);
ASSERT_EQ(3u, cache_->size());
}
} // namespace cronet
|
