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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#include "db/wal_edit.h"
#include "db/db_test_util.h"
#include "file/file_util.h"
#include "port/port.h"
#include "port/stack_trace.h"
#include "test_util/testharness.h"
#include "test_util/testutil.h"
namespace ROCKSDB_NAMESPACE {
TEST(WalSet, AddDeleteReset) {
WalSet wals;
ASSERT_TRUE(wals.GetWals().empty());
// Create WAL 1 - 10.
for (WalNumber log_number = 1; log_number <= 10; log_number++) {
wals.AddWal(WalAddition(log_number));
}
ASSERT_EQ(wals.GetWals().size(), 10);
// Delete WAL 1 - 5.
wals.DeleteWalsBefore(6);
ASSERT_EQ(wals.GetWals().size(), 5);
WalNumber expected_log_number = 6;
for (auto it : wals.GetWals()) {
WalNumber log_number = it.first;
ASSERT_EQ(log_number, expected_log_number++);
}
wals.Reset();
ASSERT_TRUE(wals.GetWals().empty());
}
TEST(WalSet, Overwrite) {
constexpr WalNumber kNumber = 100;
constexpr uint64_t kBytes = 200;
WalSet wals;
wals.AddWal(WalAddition(kNumber));
ASSERT_FALSE(wals.GetWals().at(kNumber).HasSyncedSize());
wals.AddWal(WalAddition(kNumber, WalMetadata(kBytes)));
ASSERT_TRUE(wals.GetWals().at(kNumber).HasSyncedSize());
ASSERT_EQ(wals.GetWals().at(kNumber).GetSyncedSizeInBytes(), kBytes);
}
TEST(WalSet, SmallerSyncedSize) {
constexpr WalNumber kNumber = 100;
constexpr uint64_t kBytes = 100;
WalSet wals;
ASSERT_OK(wals.AddWal(WalAddition(kNumber, WalMetadata(kBytes))));
const auto wals1 = wals.GetWals();
Status s = wals.AddWal(WalAddition(kNumber, WalMetadata(0)));
const auto wals2 = wals.GetWals();
ASSERT_OK(s);
ASSERT_EQ(wals1, wals2);
}
TEST(WalSet, CreateTwice) {
constexpr WalNumber kNumber = 100;
WalSet wals;
ASSERT_OK(wals.AddWal(WalAddition(kNumber)));
Status s = wals.AddWal(WalAddition(kNumber));
ASSERT_TRUE(s.IsCorruption());
ASSERT_TRUE(s.ToString().find("WAL 100 is created more than once") !=
std::string::npos);
}
TEST(WalSet, DeleteAllWals) {
constexpr WalNumber kMaxWalNumber = 10;
WalSet wals;
for (WalNumber i = 1; i <= kMaxWalNumber; i++) {
wals.AddWal(WalAddition(i));
}
ASSERT_OK(wals.DeleteWalsBefore(kMaxWalNumber + 1));
}
TEST(WalSet, AddObsoleteWal) {
constexpr WalNumber kNumber = 100;
WalSet wals;
ASSERT_OK(wals.DeleteWalsBefore(kNumber + 1));
ASSERT_OK(wals.AddWal(WalAddition(kNumber)));
ASSERT_TRUE(wals.GetWals().empty());
}
TEST(WalSet, MinWalNumberToKeep) {
constexpr WalNumber kNumber = 100;
WalSet wals;
ASSERT_EQ(wals.GetMinWalNumberToKeep(), 0);
ASSERT_OK(wals.DeleteWalsBefore(kNumber));
ASSERT_EQ(wals.GetMinWalNumberToKeep(), kNumber);
ASSERT_OK(wals.DeleteWalsBefore(kNumber - 1));
ASSERT_EQ(wals.GetMinWalNumberToKeep(), kNumber);
ASSERT_OK(wals.DeleteWalsBefore(kNumber + 1));
ASSERT_EQ(wals.GetMinWalNumberToKeep(), kNumber + 1);
}
class WalSetTest : public DBTestBase {
public:
WalSetTest() : DBTestBase("WalSetTest", /* env_do_fsync */ true) {}
void SetUp() override {
test_dir_ = test::PerThreadDBPath("wal_set_test");
ASSERT_OK(env_->CreateDir(test_dir_));
}
void TearDown() override {
EXPECT_OK(DestroyDir(env_, test_dir_));
logs_on_disk_.clear();
wals_.Reset();
}
void CreateWalOnDisk(WalNumber number, const std::string& fname,
uint64_t size_bytes) {
std::unique_ptr<WritableFile> f;
std::string fpath = Path(fname);
ASSERT_OK(env_->NewWritableFile(fpath, &f, EnvOptions()));
std::string content(size_bytes, '0');
ASSERT_OK(f->Append(content));
ASSERT_OK(f->Close());
logs_on_disk_[number] = fpath;
}
void AddWalToWalSet(WalNumber number, uint64_t size_bytes) {
// Create WAL.
ASSERT_OK(wals_.AddWal(WalAddition(number)));
// Close WAL.
WalMetadata wal(size_bytes);
ASSERT_OK(wals_.AddWal(WalAddition(number, wal)));
}
Status CheckWals() const { return wals_.CheckWals(env_, logs_on_disk_); }
private:
std::string test_dir_;
std::unordered_map<WalNumber, std::string> logs_on_disk_;
WalSet wals_;
std::string Path(const std::string& fname) { return test_dir_ + "/" + fname; }
};
TEST_F(WalSetTest, CheckEmptyWals) { ASSERT_OK(CheckWals()); }
TEST_F(WalSetTest, CheckWals) {
for (int number = 1; number < 10; number++) {
uint64_t size = rand() % 100;
std::stringstream ss;
ss << "log" << number;
std::string fname = ss.str();
CreateWalOnDisk(number, fname, size);
// log 0 - 5 are obsolete.
if (number > 5) {
AddWalToWalSet(number, size);
}
}
ASSERT_OK(CheckWals());
}
TEST_F(WalSetTest, CheckMissingWals) {
for (int number = 1; number < 10; number++) {
uint64_t size = rand() % 100;
AddWalToWalSet(number, size);
// logs with even number are missing from disk.
if (number % 2) {
std::stringstream ss;
ss << "log" << number;
std::string fname = ss.str();
CreateWalOnDisk(number, fname, size);
}
}
Status s = CheckWals();
ASSERT_TRUE(s.IsCorruption()) << s.ToString();
// The first log with even number is missing.
std::stringstream expected_err;
expected_err << "Missing WAL with log number: " << 2;
ASSERT_TRUE(s.ToString().find(expected_err.str()) != std::string::npos)
<< s.ToString();
}
TEST_F(WalSetTest, CheckWalsWithShrinkedSize) {
for (int number = 1; number < 10; number++) {
uint64_t size = rand() % 100 + 1;
AddWalToWalSet(number, size);
// logs with even number have shrinked size.
std::stringstream ss;
ss << "log" << number;
std::string fname = ss.str();
CreateWalOnDisk(number, fname, (number % 2) ? size : size - 1);
}
Status s = CheckWals();
ASSERT_TRUE(s.IsCorruption()) << s.ToString();
// The first log with even number has wrong size.
std::stringstream expected_err;
expected_err << "Size mismatch: WAL (log number: " << 2 << ")";
ASSERT_TRUE(s.ToString().find(expected_err.str()) != std::string::npos)
<< s.ToString();
}
} // namespace ROCKSDB_NAMESPACE
int main(int argc, char** argv) {
ROCKSDB_NAMESPACE::port::InstallStackTraceHandler();
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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