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// 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 "db/db_impl.h"
#include "leveldb/db.h"
#include "leveldb/env.h"
#include "util/testharness.h"
#include <string>
#include <vector>
namespace leveldb {
class MemEnvTest {
public:
Env* env_;
MemEnvTest()
: env_(NewMemEnv(Env::Default())) {
}
~MemEnvTest() {
delete env_;
}
};
TEST(MemEnvTest, Basics) {
uint64_t file_size;
WritableFile* writable_file;
std::vector<std::string> children;
ASSERT_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_OK(env_->GetChildren("/dir", &children));
ASSERT_EQ(0, children.size());
// Create a file.
ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file));
ASSERT_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_OK(env_->GetFileSize("/dir/f", &file_size));
ASSERT_EQ(0, file_size);
ASSERT_OK(env_->GetChildren("/dir", &children));
ASSERT_EQ(1, children.size());
ASSERT_EQ("f", children[0]);
// Write to the file.
ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file));
ASSERT_OK(writable_file->Append("abc"));
delete writable_file;
// Check that append works.
ASSERT_OK(env_->NewAppendableFile("/dir/f", &writable_file));
ASSERT_OK(env_->GetFileSize("/dir/f", &file_size));
ASSERT_EQ(3, file_size);
ASSERT_OK(writable_file->Append("hello"));
delete writable_file;
// Check for expected size.
ASSERT_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_OK(env_->RenameFile("/dir/f", "/dir/g"));
ASSERT_TRUE(!env_->FileExists("/dir/f"));
ASSERT_TRUE(env_->FileExists("/dir/g"));
ASSERT_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_OK(env_->DeleteFile("/dir/g"));
ASSERT_TRUE(!env_->FileExists("/dir/g"));
ASSERT_OK(env_->GetChildren("/dir", &children));
ASSERT_EQ(0, children.size());
ASSERT_OK(env_->DeleteDir("/dir"));
}
TEST(MemEnvTest, ReadWrite) {
WritableFile* writable_file;
SequentialFile* seq_file;
RandomAccessFile* rand_file;
Slice result;
char scratch[100];
ASSERT_OK(env_->CreateDir("/dir"));
ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file));
ASSERT_OK(writable_file->Append("hello "));
ASSERT_OK(writable_file->Append("world"));
delete writable_file;
// Read sequentially.
ASSERT_OK(env_->NewSequentialFile("/dir/f", &seq_file));
ASSERT_OK(seq_file->Read(5, &result, scratch)); // Read "hello".
ASSERT_EQ(0, result.compare("hello"));
ASSERT_OK(seq_file->Skip(1));
ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Read "world".
ASSERT_EQ(0, result.compare("world"));
ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Try reading past EOF.
ASSERT_EQ(0, result.size());
ASSERT_OK(seq_file->Skip(100)); // Try to skip past end of file.
ASSERT_OK(seq_file->Read(1000, &result, scratch));
ASSERT_EQ(0, result.size());
delete seq_file;
// Random reads.
ASSERT_OK(env_->NewRandomAccessFile("/dir/f", &rand_file));
ASSERT_OK(rand_file->Read(6, 5, &result, scratch)); // Read "world".
ASSERT_EQ(0, result.compare("world"));
ASSERT_OK(rand_file->Read(0, 5, &result, scratch)); // Read "hello".
ASSERT_EQ(0, result.compare("hello"));
ASSERT_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(MemEnvTest, Locks) {
FileLock* lock;
// These are no-ops, but we test they return success.
ASSERT_OK(env_->LockFile("some file", &lock));
ASSERT_OK(env_->UnlockFile(lock));
}
TEST(MemEnvTest, Misc) {
std::string test_dir;
ASSERT_OK(env_->GetTestDirectory(&test_dir));
ASSERT_TRUE(!test_dir.empty());
WritableFile* writable_file;
ASSERT_OK(env_->NewWritableFile("/a/b", &writable_file));
// These are no-ops, but we test they return success.
ASSERT_OK(writable_file->Sync());
ASSERT_OK(writable_file->Flush());
ASSERT_OK(writable_file->Close());
delete writable_file;
}
TEST(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_OK(env_->NewWritableFile("/dir/f", &writable_file));
ASSERT_OK(writable_file->Append("foo"));
ASSERT_OK(writable_file->Append(write_data));
delete writable_file;
SequentialFile* seq_file;
Slice result;
ASSERT_OK(env_->NewSequentialFile("/dir/f", &seq_file));
ASSERT_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_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(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_OK(DB::Open(options, "/dir/db", &db));
for (size_t i = 0; i < 3; ++i) {
ASSERT_OK(db->Put(WriteOptions(), keys[i], vals[i]));
}
for (size_t i = 0; i < 3; ++i) {
std::string res;
ASSERT_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_OK(dbi->TEST_CompactMemTable());
for (size_t i = 0; i < 3; ++i) {
std::string res;
ASSERT_OK(db->Get(ReadOptions(), keys[i], &res));
ASSERT_TRUE(res == vals[i]);
}
delete db;
}
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
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