|
|
- // 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));
- 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 for expected size.
- ASSERT_OK(env_->GetFileSize("/dir/f", &file_size));
- ASSERT_EQ(3, 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(3, 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;
- }
-
- }
-
- int main(int argc, char** argv) {
- return leveldb::test::RunAllTests();
- }
|