您最多选择25个主题
主题必须以字母或数字开头，可以包含连字符 (-)，并且长度不得超过35个字符
264 行
8.3 KiB
264 行
8.3 KiB
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#include "helpers/memenv/memenv.h"
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "gtest/gtest.h"
|
|
#include "db/db_impl.h"
|
|
#include "leveldb/db.h"
|
|
#include "leveldb/env.h"
|
|
#include "util/testutil.h"
|
|
|
|
namespace leveldb {
|
|
|
|
class MemEnvTest : public testing::Test {
|
|
public:
|
|
MemEnvTest() : env_(NewMemEnv(Env::Default())) {}
|
|
~MemEnvTest() { delete env_; }
|
|
|
|
Env* env_;
|
|
};
|
|
|
|
TEST_F(MemEnvTest, Basics) {
|
|
uint64_t file_size;
|
|
WritableFile* writable_file;
|
|
std::vector<std::string> children;
|
|
|
|
ASSERT_LEVELDB_OK(env_->CreateDir("/dir"));
|
|
|
|
// Check that the directory is empty.
|
|
ASSERT_TRUE(!env_->FileExists("/dir/non_existent"));
|
|
ASSERT_TRUE(!env_->GetFileSize("/dir/non_existent", &file_size).ok());
|
|
ASSERT_LEVELDB_OK(env_->GetChildren("/dir", &children));
|
|
ASSERT_EQ(0, children.size());
|
|
|
|
// Create a file.
|
|
ASSERT_LEVELDB_OK(env_->NewWritableFile("/dir/f", &writable_file));
|
|
ASSERT_LEVELDB_OK(env_->GetFileSize("/dir/f", &file_size));
|
|
ASSERT_EQ(0, file_size);
|
|
delete writable_file;
|
|
|
|
// Check that the file exists.
|
|
ASSERT_TRUE(env_->FileExists("/dir/f"));
|
|
ASSERT_LEVELDB_OK(env_->GetFileSize("/dir/f", &file_size));
|
|
ASSERT_EQ(0, file_size);
|
|
ASSERT_LEVELDB_OK(env_->GetChildren("/dir", &children));
|
|
ASSERT_EQ(1, children.size());
|
|
ASSERT_EQ("f", children[0]);
|
|
|
|
// Write to the file.
|
|
ASSERT_LEVELDB_OK(env_->NewWritableFile("/dir/f", &writable_file));
|
|
ASSERT_LEVELDB_OK(writable_file->Append("abc"));
|
|
delete writable_file;
|
|
|
|
// Check that append works.
|
|
ASSERT_LEVELDB_OK(env_->NewAppendableFile("/dir/f", &writable_file));
|
|
ASSERT_LEVELDB_OK(env_->GetFileSize("/dir/f", &file_size));
|
|
ASSERT_EQ(3, file_size);
|
|
ASSERT_LEVELDB_OK(writable_file->Append("hello"));
|
|
delete writable_file;
|
|
|
|
// Check for expected size.
|
|
ASSERT_LEVELDB_OK(env_->GetFileSize("/dir/f", &file_size));
|
|
ASSERT_EQ(8, file_size);
|
|
|
|
// Check that renaming works.
|
|
ASSERT_TRUE(!env_->RenameFile("/dir/non_existent", "/dir/g").ok());
|
|
ASSERT_LEVELDB_OK(env_->RenameFile("/dir/f", "/dir/g"));
|
|
ASSERT_TRUE(!env_->FileExists("/dir/f"));
|
|
ASSERT_TRUE(env_->FileExists("/dir/g"));
|
|
ASSERT_LEVELDB_OK(env_->GetFileSize("/dir/g", &file_size));
|
|
ASSERT_EQ(8, file_size);
|
|
|
|
// Check that opening non-existent file fails.
|
|
SequentialFile* seq_file;
|
|
RandomAccessFile* rand_file;
|
|
ASSERT_TRUE(!env_->NewSequentialFile("/dir/non_existent", &seq_file).ok());
|
|
ASSERT_TRUE(!seq_file);
|
|
ASSERT_TRUE(!env_->NewRandomAccessFile("/dir/non_existent", &rand_file).ok());
|
|
ASSERT_TRUE(!rand_file);
|
|
|
|
// Check that deleting works.
|
|
ASSERT_TRUE(!env_->DeleteFile("/dir/non_existent").ok());
|
|
ASSERT_LEVELDB_OK(env_->DeleteFile("/dir/g"));
|
|
ASSERT_TRUE(!env_->FileExists("/dir/g"));
|
|
ASSERT_LEVELDB_OK(env_->GetChildren("/dir", &children));
|
|
ASSERT_EQ(0, children.size());
|
|
ASSERT_LEVELDB_OK(env_->DeleteDir("/dir"));
|
|
}
|
|
|
|
TEST_F(MemEnvTest, ReadWrite) {
|
|
WritableFile* writable_file;
|
|
SequentialFile* seq_file;
|
|
RandomAccessFile* rand_file;
|
|
Slice result;
|
|
char scratch[100];
|
|
|
|
ASSERT_LEVELDB_OK(env_->CreateDir("/dir"));
|
|
|
|
ASSERT_LEVELDB_OK(env_->NewWritableFile("/dir/f", &writable_file));
|
|
ASSERT_LEVELDB_OK(writable_file->Append("hello "));
|
|
ASSERT_LEVELDB_OK(writable_file->Append("world"));
|
|
delete writable_file;
|
|
|
|
// Read sequentially.
|
|
ASSERT_LEVELDB_OK(env_->NewSequentialFile("/dir/f", &seq_file));
|
|
ASSERT_LEVELDB_OK(seq_file->Read(5, &result, scratch)); // Read "hello".
|
|
ASSERT_EQ(0, result.compare("hello"));
|
|
ASSERT_LEVELDB_OK(seq_file->Skip(1));
|
|
ASSERT_LEVELDB_OK(seq_file->Read(1000, &result, scratch)); // Read "world".
|
|
ASSERT_EQ(0, result.compare("world"));
|
|
ASSERT_LEVELDB_OK(
|
|
seq_file->Read(1000, &result, scratch)); // Try reading past EOF.
|
|
ASSERT_EQ(0, result.size());
|
|
ASSERT_LEVELDB_OK(seq_file->Skip(100)); // Try to skip past end of file.
|
|
ASSERT_LEVELDB_OK(seq_file->Read(1000, &result, scratch));
|
|
ASSERT_EQ(0, result.size());
|
|
delete seq_file;
|
|
|
|
// Random reads.
|
|
ASSERT_LEVELDB_OK(env_->NewRandomAccessFile("/dir/f", &rand_file));
|
|
ASSERT_LEVELDB_OK(rand_file->Read(6, 5, &result, scratch)); // Read "world".
|
|
ASSERT_EQ(0, result.compare("world"));
|
|
ASSERT_LEVELDB_OK(rand_file->Read(0, 5, &result, scratch)); // Read "hello".
|
|
ASSERT_EQ(0, result.compare("hello"));
|
|
ASSERT_LEVELDB_OK(rand_file->Read(10, 100, &result, scratch)); // Read "d".
|
|
ASSERT_EQ(0, result.compare("d"));
|
|
|
|
// Too high offset.
|
|
ASSERT_TRUE(!rand_file->Read(1000, 5, &result, scratch).ok());
|
|
delete rand_file;
|
|
}
|
|
|
|
TEST_F(MemEnvTest, Locks) {
|
|
FileLock* lock;
|
|
|
|
// These are no-ops, but we test they return success.
|
|
ASSERT_LEVELDB_OK(env_->LockFile("some file", &lock));
|
|
ASSERT_LEVELDB_OK(env_->UnlockFile(lock));
|
|
}
|
|
|
|
TEST_F(MemEnvTest, Misc) {
|
|
std::string test_dir;
|
|
ASSERT_LEVELDB_OK(env_->GetTestDirectory(&test_dir));
|
|
ASSERT_TRUE(!test_dir.empty());
|
|
|
|
WritableFile* writable_file;
|
|
ASSERT_LEVELDB_OK(env_->NewWritableFile("/a/b", &writable_file));
|
|
|
|
// These are no-ops, but we test they return success.
|
|
ASSERT_LEVELDB_OK(writable_file->Sync());
|
|
ASSERT_LEVELDB_OK(writable_file->Flush());
|
|
ASSERT_LEVELDB_OK(writable_file->Close());
|
|
delete writable_file;
|
|
}
|
|
|
|
TEST_F(MemEnvTest, LargeWrite) {
|
|
const size_t kWriteSize = 300 * 1024;
|
|
char* scratch = new char[kWriteSize * 2];
|
|
|
|
std::string write_data;
|
|
for (size_t i = 0; i < kWriteSize; ++i) {
|
|
write_data.append(1, static_cast<char>(i));
|
|
}
|
|
|
|
WritableFile* writable_file;
|
|
ASSERT_LEVELDB_OK(env_->NewWritableFile("/dir/f", &writable_file));
|
|
ASSERT_LEVELDB_OK(writable_file->Append("foo"));
|
|
ASSERT_LEVELDB_OK(writable_file->Append(write_data));
|
|
delete writable_file;
|
|
|
|
SequentialFile* seq_file;
|
|
Slice result;
|
|
ASSERT_LEVELDB_OK(env_->NewSequentialFile("/dir/f", &seq_file));
|
|
ASSERT_LEVELDB_OK(seq_file->Read(3, &result, scratch)); // Read "foo".
|
|
ASSERT_EQ(0, result.compare("foo"));
|
|
|
|
size_t read = 0;
|
|
std::string read_data;
|
|
while (read < kWriteSize) {
|
|
ASSERT_LEVELDB_OK(seq_file->Read(kWriteSize - read, &result, scratch));
|
|
read_data.append(result.data(), result.size());
|
|
read += result.size();
|
|
}
|
|
ASSERT_TRUE(write_data == read_data);
|
|
delete seq_file;
|
|
delete[] scratch;
|
|
}
|
|
|
|
TEST_F(MemEnvTest, OverwriteOpenFile) {
|
|
const char kWrite1Data[] = "Write #1 data";
|
|
const size_t kFileDataLen = sizeof(kWrite1Data) - 1;
|
|
const std::string kTestFileName = testing::TempDir() + "leveldb-TestFile.dat";
|
|
|
|
ASSERT_LEVELDB_OK(WriteStringToFile(env_, kWrite1Data, kTestFileName));
|
|
|
|
RandomAccessFile* rand_file;
|
|
ASSERT_LEVELDB_OK(env_->NewRandomAccessFile(kTestFileName, &rand_file));
|
|
|
|
const char kWrite2Data[] = "Write #2 data";
|
|
ASSERT_LEVELDB_OK(WriteStringToFile(env_, kWrite2Data, kTestFileName));
|
|
|
|
// Verify that overwriting an open file will result in the new file data
|
|
// being read from files opened before the write.
|
|
Slice result;
|
|
char scratch[kFileDataLen];
|
|
ASSERT_LEVELDB_OK(rand_file->Read(0, kFileDataLen, &result, scratch));
|
|
ASSERT_EQ(0, result.compare(kWrite2Data));
|
|
|
|
delete rand_file;
|
|
}
|
|
|
|
TEST_F(MemEnvTest, DBTest) {
|
|
Options options;
|
|
options.create_if_missing = true;
|
|
options.env = env_;
|
|
DB* db;
|
|
|
|
const Slice keys[] = {Slice("aaa"), Slice("bbb"), Slice("ccc")};
|
|
const Slice vals[] = {Slice("foo"), Slice("bar"), Slice("baz")};
|
|
|
|
ASSERT_LEVELDB_OK(DB::Open(options, "/dir/db", &db));
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
ASSERT_LEVELDB_OK(db->Put(WriteOptions(), keys[i], vals[i]));
|
|
}
|
|
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
std::string res;
|
|
ASSERT_LEVELDB_OK(db->Get(ReadOptions(), keys[i], &res));
|
|
ASSERT_TRUE(res == vals[i]);
|
|
}
|
|
|
|
Iterator* iterator = db->NewIterator(ReadOptions());
|
|
iterator->SeekToFirst();
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
ASSERT_TRUE(iterator->Valid());
|
|
ASSERT_TRUE(keys[i] == iterator->key());
|
|
ASSERT_TRUE(vals[i] == iterator->value());
|
|
iterator->Next();
|
|
}
|
|
ASSERT_TRUE(!iterator->Valid());
|
|
delete iterator;
|
|
|
|
DBImpl* dbi = reinterpret_cast<DBImpl*>(db);
|
|
ASSERT_LEVELDB_OK(dbi->TEST_CompactMemTable());
|
|
|
|
for (size_t i = 0; i < 3; ++i) {
|
|
std::string res;
|
|
ASSERT_LEVELDB_OK(db->Get(ReadOptions(), keys[i], &res));
|
|
ASSERT_TRUE(res == vals[i]);
|
|
}
|
|
|
|
delete db;
|
|
}
|
|
|
|
} // namespace leveldb
|
|
|
|
int main(int argc, char** argv) {
|
|
testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|