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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome/browser/value_store/value_store_unittest.h" | 5 #include "chrome/browser/value_store/value_store_unittest.h" |
6 | 6 |
7 #include "base/file_util.h" | |
8 #include "base/files/file_enumerator.h" | |
9 #include "base/files/scoped_temp_dir.h" | |
10 #include "base/memory/ref_counted.h" | 7 #include "base/memory/ref_counted.h" |
11 #include "base/message_loop/message_loop.h" | |
12 #include "base/values.h" | |
13 #include "chrome/browser/value_store/leveldb_value_store.h" | 8 #include "chrome/browser/value_store/leveldb_value_store.h" |
14 #include "content/public/test/test_browser_thread_bundle.h" | |
15 #include "testing/gtest/include/gtest/gtest.h" | |
16 #include "third_party/leveldatabase/src/include/leveldb/db.h" | |
17 #include "third_party/leveldatabase/src/include/leveldb/write_batch.h" | |
18 | 9 |
19 namespace { | 10 namespace { |
20 | 11 |
21 ValueStore* Param(const base::FilePath& file_path) { | 12 ValueStore* Param(const base::FilePath& file_path) { |
22 return new LeveldbValueStore(file_path); | 13 return new LeveldbValueStore(file_path); |
23 } | 14 } |
24 | 15 |
25 } // namespace | 16 } // namespace |
26 | 17 |
27 INSTANTIATE_TEST_CASE_P( | 18 INSTANTIATE_TEST_CASE_P( |
28 LeveldbValueStore, | 19 LeveldbValueStore, |
29 ValueStoreTest, | 20 ValueStoreTest, |
30 testing::Values(&Param)); | 21 testing::Values(&Param)); |
31 | |
32 class LeveldbValueStoreUnitTest : public testing::Test { | |
33 public: | |
34 LeveldbValueStoreUnitTest() {} | |
35 virtual ~LeveldbValueStoreUnitTest() {} | |
36 | |
37 protected: | |
38 virtual void SetUp() OVERRIDE { | |
39 ASSERT_TRUE(database_dir_.CreateUniqueTempDir()); | |
40 OpenStore(); | |
41 ASSERT_FALSE(store_->Get()->HasError()); | |
42 } | |
43 | |
44 virtual void TearDown() OVERRIDE { | |
45 store_->Clear(); | |
46 store_.reset(); | |
47 } | |
48 | |
49 void CloseStore() { store_.reset(); } | |
50 | |
51 void OpenStore() { store_.reset(new LeveldbValueStore(database_path())); } | |
52 | |
53 LeveldbValueStore* store() { return store_.get(); } | |
54 const base::FilePath& database_path() { return database_dir_.path(); } | |
55 | |
56 private: | |
57 scoped_ptr<LeveldbValueStore> store_; | |
58 base::ScopedTempDir database_dir_; | |
59 | |
60 content::TestBrowserThreadBundle thread_bundle_; | |
61 }; | |
62 | |
63 // Check that we can restore a single corrupted key in the LeveldbValueStore. | |
64 TEST_F(LeveldbValueStoreUnitTest, RestoreKeyTest) { | |
65 const char kNotCorruptKey[] = "not-corrupt"; | |
66 const char kValue[] = "value"; | |
67 | |
68 // Insert a valid pair. | |
69 scoped_ptr<base::Value> value(base::Value::CreateStringValue(kValue)); | |
70 ASSERT_FALSE( | |
71 store()->Set(ValueStore::DEFAULTS, kNotCorruptKey, *value)->HasError()); | |
72 | |
73 // Insert a corrupt pair. | |
74 const char kCorruptKey[] = "corrupt"; | |
75 leveldb::WriteBatch batch; | |
76 batch.Put(kCorruptKey, "[{(.*+\"\'\\"); | |
77 ASSERT_TRUE(store()->WriteToDbForTest(&batch)); | |
78 | |
79 // Verify corruption. | |
80 ValueStore::ReadResult result = store()->Get(kCorruptKey); | |
81 ASSERT_TRUE(result->HasError()); | |
82 ASSERT_EQ(ValueStore::CORRUPTION, result->error().code); | |
83 | |
84 // Restore and verify. | |
85 ASSERT_TRUE(store()->RestoreKey(kCorruptKey)); | |
86 result = store()->Get(kCorruptKey); | |
87 EXPECT_FALSE(result->HasError()); | |
88 EXPECT_TRUE(result->settings().empty()); | |
89 | |
90 // Verify that the valid pair is still present. | |
91 result = store()->Get(kNotCorruptKey); | |
92 EXPECT_FALSE(result->HasError()); | |
93 EXPECT_TRUE(result->settings().HasKey(kNotCorruptKey)); | |
94 std::string value_string; | |
95 EXPECT_TRUE(result->settings().GetString(kNotCorruptKey, &value_string)); | |
96 EXPECT_EQ(kValue, value_string); | |
97 } | |
98 | |
99 // Test that the Restore() method does not just delete the entire database | |
100 // (unless absolutely necessary), and instead only removes corrupted keys. | |
101 TEST_F(LeveldbValueStoreUnitTest, RestoreDoesMinimumNecessary) { | |
102 const char* kNotCorruptKeys[] = {"a", "n", "z"}; | |
103 const size_t kNotCorruptKeysSize = 3u; | |
104 const char kCorruptKey1[] = "f"; | |
105 const char kCorruptKey2[] = "s"; | |
106 const char kValue[] = "value"; | |
107 const char kCorruptValue[] = "[{(.*+\"\'\\"; | |
108 | |
109 // Insert a collection of non-corrupted pairs. | |
110 scoped_ptr<base::Value> value(base::Value::CreateStringValue(kValue)); | |
111 for (size_t i = 0; i < kNotCorruptKeysSize; ++i) { | |
112 ASSERT_FALSE(store() | |
113 ->Set(ValueStore::DEFAULTS, kNotCorruptKeys[i], *value) | |
114 ->HasError()); | |
115 } | |
116 | |
117 // Insert a few corrupted pairs. | |
118 leveldb::WriteBatch batch; | |
119 batch.Put(kCorruptKey1, kCorruptValue); | |
120 batch.Put(kCorruptKey2, kCorruptValue); | |
121 ASSERT_TRUE(store()->WriteToDbForTest(&batch)); | |
122 | |
123 // Verify that we broke it, and then fix it. | |
124 ValueStore::ReadResult result = store()->Get(); | |
125 ASSERT_TRUE(result->HasError()); | |
126 ASSERT_EQ(ValueStore::CORRUPTION, result->error().code); | |
127 | |
128 ASSERT_TRUE(store()->Restore()); | |
129 | |
130 // We should still have all valid pairs present in the database. | |
131 std::string value_string; | |
132 for (size_t i = 0; i < kNotCorruptKeysSize; ++i) { | |
133 result = store()->Get(kNotCorruptKeys[i]); | |
134 EXPECT_FALSE(result->HasError()); | |
135 EXPECT_TRUE(result->settings().HasKey(kNotCorruptKeys[i])); | |
136 EXPECT_TRUE( | |
137 result->settings().GetString(kNotCorruptKeys[i], &value_string)); | |
138 EXPECT_EQ(kValue, value_string); | |
139 } | |
140 } | |
141 | |
142 // Test that the LeveldbValueStore can recover in the case of a CATastrophic | |
143 // failure and we have total corruption. In this case, the database is plagued | |
144 // by LolCats. | |
145 // Full corruption has been known to happen occasionally in strange edge cases, | |
146 // such as after users use Windows Restore. We can't prevent it, but we need to | |
147 // be able to handle it smoothly. | |
148 TEST_F(LeveldbValueStoreUnitTest, RestoreFullDatabase) { | |
149 const std::string kLolCats("I can haz leveldb filez?"); | |
150 const char* kNotCorruptKeys[] = {"a", "n", "z"}; | |
151 const size_t kNotCorruptKeysSize = 3u; | |
152 const char kValue[] = "value"; | |
153 | |
154 // Generate a database. | |
155 scoped_ptr<base::Value> value(base::Value::CreateStringValue(kValue)); | |
156 for (size_t i = 0; i < kNotCorruptKeysSize; ++i) { | |
157 ASSERT_FALSE(store() | |
158 ->Set(ValueStore::DEFAULTS, kNotCorruptKeys[i], *value) | |
159 ->HasError()); | |
160 } | |
161 | |
162 // Close it (so we remove the lock), and replace all files with LolCats. | |
163 CloseStore(); | |
164 base::FileEnumerator enumerator( | |
165 database_path(), true /* recursive */, base::FileEnumerator::FILES); | |
166 for (base::FilePath file = enumerator.Next(); !file.empty(); | |
167 file = enumerator.Next()) { | |
168 // WriteFile() failure is a result of -1. | |
169 ASSERT_NE(file_util::WriteFile(file, kLolCats.c_str(), kLolCats.length()), | |
170 -1); | |
171 } | |
172 OpenStore(); | |
173 | |
174 // We should definitely have an error. | |
175 ValueStore::ReadResult result = store()->Get(); | |
176 ASSERT_TRUE(result->HasError()); | |
177 ASSERT_EQ(ValueStore::CORRUPTION, result->error().code); | |
178 | |
179 ASSERT_TRUE(store()->Restore()); | |
180 result = store()->Get(); | |
181 EXPECT_FALSE(result->HasError()); | |
182 // We couldn't recover anything, but we should be in a sane state again. | |
183 EXPECT_EQ(0u, result->settings().size()); | |
184 } | |
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