// 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(); }