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