mirror of
https://github.com/google/leveldb.git
synced 2024-12-04 22:38:59 +08:00
36a5f8ed7f
- Replace raw slice comparison with a call to user comparator.
Added test for custom comparators.
- Fix end of namespace comments.
- Fixed bug in picking inputs for a level-0 compaction.
When finding overlapping files, the covered range may expand
as files are added to the input set. We now correctly expand
the range when this happens instead of continuing to use the
old range. For example, suppose L0 contains files with the
following ranges:
F1: a .. d
F2: c .. g
F3: f .. j
and the initial compaction target is F3. We used to search
for range f..j which yielded {F2,F3}. However we now expand
the range as soon as another file is added. In this case,
when F2 is added, we expand the range to c..j and restart the
search. That picks up file F1 as well.
This change fixes a bug related to deleted keys showing up
incorrectly after a compaction as described in Issue 44.
(Sync with upstream @25072954)
233 lines
6.7 KiB
C++
233 lines
6.7 KiB
C++
// 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 "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/testharness.h"
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#include <string>
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#include <vector>
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namespace leveldb {
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class MemEnvTest {
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public:
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Env* env_;
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MemEnvTest()
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: env_(NewMemEnv(Env::Default())) {
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}
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~MemEnvTest() {
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delete env_;
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}
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};
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TEST(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_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_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_OK(env_->NewWritableFile("/dir/f", &writable_file));
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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_OK(env_->GetFileSize("/dir/f", &file_size));
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ASSERT_EQ(0, file_size);
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ASSERT_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_OK(env_->NewWritableFile("/dir/f", &writable_file));
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ASSERT_OK(writable_file->Append("abc"));
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delete writable_file;
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// Check for expected size.
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ASSERT_OK(env_->GetFileSize("/dir/f", &file_size));
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ASSERT_EQ(3, 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_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_OK(env_->GetFileSize("/dir/g", &file_size));
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ASSERT_EQ(3, 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_->DeleteFile("/dir/non_existent").ok());
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ASSERT_OK(env_->DeleteFile("/dir/g"));
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ASSERT_TRUE(!env_->FileExists("/dir/g"));
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ASSERT_OK(env_->GetChildren("/dir", &children));
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ASSERT_EQ(0, children.size());
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ASSERT_OK(env_->DeleteDir("/dir"));
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}
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TEST(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_OK(env_->CreateDir("/dir"));
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ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file));
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ASSERT_OK(writable_file->Append("hello "));
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ASSERT_OK(writable_file->Append("world"));
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delete writable_file;
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// Read sequentially.
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ASSERT_OK(env_->NewSequentialFile("/dir/f", &seq_file));
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ASSERT_OK(seq_file->Read(5, &result, scratch)); // Read "hello".
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ASSERT_EQ(0, result.compare("hello"));
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ASSERT_OK(seq_file->Skip(1));
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ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Read "world".
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ASSERT_EQ(0, result.compare("world"));
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ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Try reading past EOF.
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ASSERT_EQ(0, result.size());
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ASSERT_OK(seq_file->Skip(100)); // Try to skip past end of file.
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ASSERT_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_OK(env_->NewRandomAccessFile("/dir/f", &rand_file));
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ASSERT_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_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_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(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_OK(env_->LockFile("some file", &lock));
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ASSERT_OK(env_->UnlockFile(lock));
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}
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TEST(MemEnvTest, Misc) {
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std::string test_dir;
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ASSERT_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_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_OK(writable_file->Sync());
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ASSERT_OK(writable_file->Flush());
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ASSERT_OK(writable_file->Close());
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delete writable_file;
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}
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TEST(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_OK(env_->NewWritableFile("/dir/f", &writable_file));
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ASSERT_OK(writable_file->Append("foo"));
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ASSERT_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_OK(env_->NewSequentialFile("/dir/f", &seq_file));
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ASSERT_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_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(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_OK(DB::Open(options, "/dir/db", &db));
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for (size_t i = 0; i < 3; ++i) {
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ASSERT_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_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_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_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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int main(int argc, char** argv) {
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return leveldb::test::RunAllTests();
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}
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