| // 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; |
| } |
| |
| } // namespace leveldb |
| |
| int main(int argc, char** argv) { |
| return leveldb::test::RunAllTests(); |
| } |