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