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
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/browser/value_store/value_store_unittest.h"
#include <stddef.h>
#include "base/files/file_enumerator.h"
#include "base/files/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "base/memory/ref_counted.h"
#include "base/message_loop/message_loop.h"
#include "base/values.h"
#include "content/public/test/test_browser_thread_bundle.h"
#include "extensions/browser/value_store/leveldb_value_store.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/leveldatabase/src/include/leveldb/db.h"
#include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
namespace {
const char kDatabaseUMAClientName[] = "Test";
ValueStore* Param(const base::FilePath& file_path) {
return new LeveldbValueStore(kDatabaseUMAClientName, file_path);
}
} // namespace
INSTANTIATE_TEST_CASE_P(
LeveldbValueStore,
ValueStoreTest,
testing::Values(&Param));
class LeveldbValueStoreUnitTest : public testing::Test {
public:
LeveldbValueStoreUnitTest() {}
~LeveldbValueStoreUnitTest() override {}
protected:
void SetUp() override {
ASSERT_TRUE(database_dir_.CreateUniqueTempDir());
CreateStore();
ASSERT_TRUE(store_->Get()->status().ok());
}
void TearDown() override {
if (!store_)
return;
store_->Clear();
CloseStore();
}
void CloseStore() { store_.reset(); }
void CreateStore() {
store_.reset(
new LeveldbValueStore(kDatabaseUMAClientName, database_path()));
}
LeveldbValueStore* store() { return store_.get(); }
const base::FilePath& database_path() { return database_dir_.path(); }
private:
scoped_ptr<LeveldbValueStore> store_;
base::ScopedTempDir database_dir_;
content::TestBrowserThreadBundle thread_bundle_;
};
// Check that we can restore a single corrupted key in the LeveldbValueStore.
TEST_F(LeveldbValueStoreUnitTest, RestoreKeyTest) {
const char kNotCorruptKey[] = "not-corrupt";
const char kValue[] = "value";
// Insert a valid pair.
scoped_ptr<base::Value> value(new base::StringValue(kValue));
ASSERT_TRUE(store()
->Set(ValueStore::DEFAULTS, kNotCorruptKey, *value)
->status().ok());
// Insert a corrupt pair.
const char kCorruptKey[] = "corrupt";
leveldb::WriteBatch batch;
batch.Put(kCorruptKey, "[{(.*+\"\'\\");
ASSERT_TRUE(store()->WriteToDbForTest(&batch));
// Verify corruption (the first Get will return corruption).
ValueStore::ReadResult result = store()->Get(kCorruptKey);
ASSERT_FALSE(result->status().ok());
ASSERT_EQ(ValueStore::CORRUPTION, result->status().code);
// Verify restored (was deleted in the first Get).
result = store()->Get(kCorruptKey);
EXPECT_TRUE(result->status().ok()) << "Get result not OK: "
<< result->status().message;
EXPECT_TRUE(result->settings().empty());
// Verify that the valid pair is still present.
result = store()->Get(kNotCorruptKey);
EXPECT_TRUE(result->status().ok());
EXPECT_TRUE(result->settings().HasKey(kNotCorruptKey));
std::string value_string;
EXPECT_TRUE(result->settings().GetString(kNotCorruptKey, &value_string));
EXPECT_EQ(kValue, value_string);
}
// Test that the Restore() method does not just delete the entire database
// (unless absolutely necessary), and instead only removes corrupted keys.
TEST_F(LeveldbValueStoreUnitTest, RestoreDoesMinimumNecessary) {
const char* kNotCorruptKeys[] = {"a", "n", "z"};
const size_t kNotCorruptKeysSize = 3u;
const char kCorruptKey1[] = "f";
const char kCorruptKey2[] = "s";
const char kValue[] = "value";
const char kCorruptValue[] = "[{(.*+\"\'\\";
// Insert a collection of non-corrupted pairs.
scoped_ptr<base::Value> value(new base::StringValue(kValue));
for (size_t i = 0; i < kNotCorruptKeysSize; ++i) {
ASSERT_TRUE(store()
->Set(ValueStore::DEFAULTS, kNotCorruptKeys[i], *value)
->status().ok());
}
// Insert a few corrupted pairs.
leveldb::WriteBatch batch;
batch.Put(kCorruptKey1, kCorruptValue);
batch.Put(kCorruptKey2, kCorruptValue);
ASSERT_TRUE(store()->WriteToDbForTest(&batch));
// Verify that we broke it and that it was repaired by the value store.
ValueStore::ReadResult result = store()->Get();
ASSERT_FALSE(result->status().ok());
ASSERT_EQ(ValueStore::CORRUPTION, result->status().code);
ASSERT_EQ(ValueStore::VALUE_RESTORE_DELETE_SUCCESS,
result->status().restore_status);
// We should still have all valid pairs present in the database.
std::string value_string;
for (size_t i = 0; i < kNotCorruptKeysSize; ++i) {
result = store()->Get(kNotCorruptKeys[i]);
EXPECT_TRUE(result->status().ok());
ASSERT_EQ(ValueStore::RESTORE_NONE, result->status().restore_status);
EXPECT_TRUE(result->settings().HasKey(kNotCorruptKeys[i]));
EXPECT_TRUE(
result->settings().GetString(kNotCorruptKeys[i], &value_string));
EXPECT_EQ(kValue, value_string);
}
}
// Test that the LeveldbValueStore can recover in the case of a CATastrophic
// failure and we have total corruption. In this case, the database is plagued
// by LolCats.
// Full corruption has been known to happen occasionally in strange edge cases,
// such as after users use Windows Restore. We can't prevent it, but we need to
// be able to handle it smoothly.
TEST_F(LeveldbValueStoreUnitTest, RestoreFullDatabase) {
const std::string kLolCats("I can haz leveldb filez?");
const char* kNotCorruptKeys[] = {"a", "n", "z"};
const size_t kNotCorruptKeysSize = 3u;
const char kValue[] = "value";
// Generate a database.
scoped_ptr<base::Value> value(new base::StringValue(kValue));
for (size_t i = 0; i < kNotCorruptKeysSize; ++i) {
ASSERT_TRUE(store()
->Set(ValueStore::DEFAULTS, kNotCorruptKeys[i], *value)
->status().ok());
}
// Close it (so we remove the lock), and replace all files with LolCats.
CloseStore();
base::FileEnumerator enumerator(
database_path(), true /* recursive */, base::FileEnumerator::FILES);
for (base::FilePath file = enumerator.Next(); !file.empty();
file = enumerator.Next()) {
// WriteFile() failure is a result of -1.
ASSERT_NE(base::WriteFile(file, kLolCats.c_str(), kLolCats.length()), -1);
}
CreateStore();
// We couldn't recover anything, but we should be in a sane state again.
ValueStore::ReadResult result = store()->Get();
ASSERT_EQ(ValueStore::DB_RESTORE_REPAIR_SUCCESS,
result->status().restore_status);
EXPECT_TRUE(result->status().ok());
EXPECT_EQ(0u, result->settings().size());
}
|
