src/leveldb/helpers/memenv/memenv_test.cc

   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 }