memenv_test.cc raw
1 // Copyright (c) 2011 The LevelDB 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. See the AUTHORS file for names of contributors.
4
5 #include "helpers/memenv/memenv.h"
6
7 #include <string>
8 #include <vector>
9
10 #include "db/db_impl.h"
11 #include "leveldb/db.h"
12 #include "leveldb/env.h"
13 #include "util/testharness.h"
14
15 namespace leveldb {
16
17 class MemEnvTest {
18 public:
19 MemEnvTest() : env_(NewMemEnv(Env::Default())) {}
20 ~MemEnvTest() { delete env_; }
21
22 Env* env_;
23 };
24
25 TEST(MemEnvTest, Basics) {
26 uint64_t file_size;
27 WritableFile* writable_file;
28 std::vector<std::string> children;
29
30 ASSERT_OK(env_->CreateDir("/dir"));
31
32 // Check that the directory is empty.
33 ASSERT_TRUE(!env_->FileExists("/dir/non_existent"));
34 ASSERT_TRUE(!env_->GetFileSize("/dir/non_existent", &file_size).ok());
35 ASSERT_OK(env_->GetChildren("/dir", &children));
36 ASSERT_EQ(0, children.size());
37
38 // Create a file.
39 ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file));
40 ASSERT_OK(env_->GetFileSize("/dir/f", &file_size));
41 ASSERT_EQ(0, file_size);
42 delete writable_file;
43
44 // Check that the file exists.
45 ASSERT_TRUE(env_->FileExists("/dir/f"));
46 ASSERT_OK(env_->GetFileSize("/dir/f", &file_size));
47 ASSERT_EQ(0, file_size);
48 ASSERT_OK(env_->GetChildren("/dir", &children));
49 ASSERT_EQ(1, children.size());
50 ASSERT_EQ("f", children[0]);
51
52 // Write to the file.
53 ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file));
54 ASSERT_OK(writable_file->Append("abc"));
55 delete writable_file;
56
57 // Check that append works.
58 ASSERT_OK(env_->NewAppendableFile("/dir/f", &writable_file));
59 ASSERT_OK(env_->GetFileSize("/dir/f", &file_size));
60 ASSERT_EQ(3, file_size);
61 ASSERT_OK(writable_file->Append("hello"));
62 delete writable_file;
63
64 // Check for expected size.
65 ASSERT_OK(env_->GetFileSize("/dir/f", &file_size));
66 ASSERT_EQ(8, file_size);
67
68 // Check that renaming works.
69 ASSERT_TRUE(!env_->RenameFile("/dir/non_existent", "/dir/g").ok());
70 ASSERT_OK(env_->RenameFile("/dir/f", "/dir/g"));
71 ASSERT_TRUE(!env_->FileExists("/dir/f"));
72 ASSERT_TRUE(env_->FileExists("/dir/g"));
73 ASSERT_OK(env_->GetFileSize("/dir/g", &file_size));
74 ASSERT_EQ(8, file_size);
75
76 // Check that opening non-existent file fails.
77 SequentialFile* seq_file;
78 RandomAccessFile* rand_file;
79 ASSERT_TRUE(!env_->NewSequentialFile("/dir/non_existent", &seq_file).ok());
80 ASSERT_TRUE(!seq_file);
81 ASSERT_TRUE(!env_->NewRandomAccessFile("/dir/non_existent", &rand_file).ok());
82 ASSERT_TRUE(!rand_file);
83
84 // Check that deleting works.
85 ASSERT_TRUE(!env_->DeleteFile("/dir/non_existent").ok());
86 ASSERT_OK(env_->DeleteFile("/dir/g"));
87 ASSERT_TRUE(!env_->FileExists("/dir/g"));
88 ASSERT_OK(env_->GetChildren("/dir", &children));
89 ASSERT_EQ(0, children.size());
90 ASSERT_OK(env_->DeleteDir("/dir"));
91 }
92
93 TEST(MemEnvTest, ReadWrite) {
94 WritableFile* writable_file;
95 SequentialFile* seq_file;
96 RandomAccessFile* rand_file;
97 Slice result;
98 char scratch[100];
99
100 ASSERT_OK(env_->CreateDir("/dir"));
101
102 ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file));
103 ASSERT_OK(writable_file->Append("hello "));
104 ASSERT_OK(writable_file->Append("world"));
105 delete writable_file;
106
107 // Read sequentially.
108 ASSERT_OK(env_->NewSequentialFile("/dir/f", &seq_file));
109 ASSERT_OK(seq_file->Read(5, &result, scratch)); // Read "hello".
110 ASSERT_EQ(0, result.compare("hello"));
111 ASSERT_OK(seq_file->Skip(1));
112 ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Read "world".
113 ASSERT_EQ(0, result.compare("world"));
114 ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Try reading past EOF.
115 ASSERT_EQ(0, result.size());
116 ASSERT_OK(seq_file->Skip(100)); // Try to skip past end of file.
117 ASSERT_OK(seq_file->Read(1000, &result, scratch));
118 ASSERT_EQ(0, result.size());
119 delete seq_file;
120
121 // Random reads.
122 ASSERT_OK(env_->NewRandomAccessFile("/dir/f", &rand_file));
123 ASSERT_OK(rand_file->Read(6, 5, &result, scratch)); // Read "world".
124 ASSERT_EQ(0, result.compare("world"));
125 ASSERT_OK(rand_file->Read(0, 5, &result, scratch)); // Read "hello".
126 ASSERT_EQ(0, result.compare("hello"));
127 ASSERT_OK(rand_file->Read(10, 100, &result, scratch)); // Read "d".
128 ASSERT_EQ(0, result.compare("d"));
129
130 // Too high offset.
131 ASSERT_TRUE(!rand_file->Read(1000, 5, &result, scratch).ok());
132 delete rand_file;
133 }
134
135 TEST(MemEnvTest, Locks) {
136 FileLock* lock;
137
138 // These are no-ops, but we test they return success.
139 ASSERT_OK(env_->LockFile("some file", &lock));
140 ASSERT_OK(env_->UnlockFile(lock));
141 }
142
143 TEST(MemEnvTest, Misc) {
144 std::string test_dir;
145 ASSERT_OK(env_->GetTestDirectory(&test_dir));
146 ASSERT_TRUE(!test_dir.empty());
147
148 WritableFile* writable_file;
149 ASSERT_OK(env_->NewWritableFile("/a/b", &writable_file));
150
151 // These are no-ops, but we test they return success.
152 ASSERT_OK(writable_file->Sync());
153 ASSERT_OK(writable_file->Flush());
154 ASSERT_OK(writable_file->Close());
155 delete writable_file;
156 }
157
158 TEST(MemEnvTest, LargeWrite) {
159 const size_t kWriteSize = 300 * 1024;
160 char* scratch = new char[kWriteSize * 2];
161
162 std::string write_data;
163 for (size_t i = 0; i < kWriteSize; ++i) {
164 write_data.append(1, static_cast<char>(i));
165 }
166
167 WritableFile* writable_file;
168 ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file));
169 ASSERT_OK(writable_file->Append("foo"));
170 ASSERT_OK(writable_file->Append(write_data));
171 delete writable_file;
172
173 SequentialFile* seq_file;
174 Slice result;
175 ASSERT_OK(env_->NewSequentialFile("/dir/f", &seq_file));
176 ASSERT_OK(seq_file->Read(3, &result, scratch)); // Read "foo".
177 ASSERT_EQ(0, result.compare("foo"));
178
179 size_t read = 0;
180 std::string read_data;
181 while (read < kWriteSize) {
182 ASSERT_OK(seq_file->Read(kWriteSize - read, &result, scratch));
183 read_data.append(result.data(), result.size());
184 read += result.size();
185 }
186 ASSERT_TRUE(write_data == read_data);
187 delete seq_file;
188 delete[] scratch;
189 }
190
191 TEST(MemEnvTest, OverwriteOpenFile) {
192 const char kWrite1Data[] = "Write #1 data";
193 const size_t kFileDataLen = sizeof(kWrite1Data) - 1;
194 const std::string kTestFileName = test::TmpDir() + "/leveldb-TestFile.dat";
195
196 ASSERT_OK(WriteStringToFile(env_, kWrite1Data, kTestFileName));
197
198 RandomAccessFile* rand_file;
199 ASSERT_OK(env_->NewRandomAccessFile(kTestFileName, &rand_file));
200
201 const char kWrite2Data[] = "Write #2 data";
202 ASSERT_OK(WriteStringToFile(env_, kWrite2Data, kTestFileName));
203
204 // Verify that overwriting an open file will result in the new file data
205 // being read from files opened before the write.
206 Slice result;
207 char scratch[kFileDataLen];
208 ASSERT_OK(rand_file->Read(0, kFileDataLen, &result, scratch));
209 ASSERT_EQ(0, result.compare(kWrite2Data));
210
211 delete rand_file;
212 }
213
214 TEST(MemEnvTest, DBTest) {
215 Options options;
216 options.create_if_missing = true;
217 options.env = env_;
218 DB* db;
219
220 const Slice keys[] = {Slice("aaa"), Slice("bbb"), Slice("ccc")};
221 const Slice vals[] = {Slice("foo"), Slice("bar"), Slice("baz")};
222
223 ASSERT_OK(DB::Open(options, "/dir/db", &db));
224 for (size_t i = 0; i < 3; ++i) {
225 ASSERT_OK(db->Put(WriteOptions(), keys[i], vals[i]));
226 }
227
228 for (size_t i = 0; i < 3; ++i) {
229 std::string res;
230 ASSERT_OK(db->Get(ReadOptions(), keys[i], &res));
231 ASSERT_TRUE(res == vals[i]);
232 }
233
234 Iterator* iterator = db->NewIterator(ReadOptions());
235 iterator->SeekToFirst();
236 for (size_t i = 0; i < 3; ++i) {
237 ASSERT_TRUE(iterator->Valid());
238 ASSERT_TRUE(keys[i] == iterator->key());
239 ASSERT_TRUE(vals[i] == iterator->value());
240 iterator->Next();
241 }
242 ASSERT_TRUE(!iterator->Valid());
243 delete iterator;
244
245 DBImpl* dbi = reinterpret_cast<DBImpl*>(db);
246 ASSERT_OK(dbi->TEST_CompactMemTable());
247
248 for (size_t i = 0; i < 3; ++i) {
249 std::string res;
250 ASSERT_OK(db->Get(ReadOptions(), keys[i], &res));
251 ASSERT_TRUE(res == vals[i]);
252 }
253
254 delete db;
255 }
256
257 } // namespace leveldb
258
259 int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }
260