Revision 346d1069c3031468cf5cb06299f018a873c9fb33 authored by Daniel Black on 26 June 2018, 05:42:35 UTC, committed by Facebook Github Bot on 26 June 2018, 05:58:19 UTC
Summary: Pinned the alignment of StatisticsData to the cacheline size rather than just extending its size (which could go over two cache lines)if unaligned in allocation. Avoid compile errors in the process as per individual commit messages. strengthen static_assert to CACHELINE rather than the highest common multiple. Closes https://github.com/facebook/rocksdb/pull/4036 Differential Revision: D8582844 Pulled By: yiwu-arbug fbshipit-source-id: 363c37029f28e6093e06c60b987bca9aa204bc71
1 parent 6d454d7
log_test.cc
// 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).
//
// 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 "db/log_reader.h"
#include "db/log_writer.h"
#include "rocksdb/env.h"
#include "util/coding.h"
#include "util/crc32c.h"
#include "util/file_reader_writer.h"
#include "util/random.h"
#include "util/testharness.h"
#include "util/testutil.h"
namespace rocksdb {
namespace log {
// Construct a string of the specified length made out of the supplied
// partial string.
static std::string BigString(const std::string& partial_string, size_t n) {
std::string result;
while (result.size() < n) {
result.append(partial_string);
}
result.resize(n);
return result;
}
// Construct a string from a number
static std::string NumberString(int n) {
char buf[50];
snprintf(buf, sizeof(buf), "%d.", n);
return std::string(buf);
}
// Return a skewed potentially long string
static std::string RandomSkewedString(int i, Random* rnd) {
return BigString(NumberString(i), rnd->Skewed(17));
}
class LogTest : public ::testing::TestWithParam<int> {
private:
class StringSource : public SequentialFile {
public:
Slice& contents_;
bool force_error_;
size_t force_error_position_;
bool force_eof_;
size_t force_eof_position_;
bool returned_partial_;
explicit StringSource(Slice& contents) :
contents_(contents),
force_error_(false),
force_error_position_(0),
force_eof_(false),
force_eof_position_(0),
returned_partial_(false) { }
virtual Status Read(size_t n, Slice* result, char* scratch) override {
EXPECT_TRUE(!returned_partial_) << "must not Read() after eof/error";
if (force_error_) {
if (force_error_position_ >= n) {
force_error_position_ -= n;
} else {
*result = Slice(contents_.data(), force_error_position_);
contents_.remove_prefix(force_error_position_);
force_error_ = false;
returned_partial_ = true;
return Status::Corruption("read error");
}
}
if (contents_.size() < n) {
n = contents_.size();
returned_partial_ = true;
}
if (force_eof_) {
if (force_eof_position_ >= n) {
force_eof_position_ -= n;
} else {
force_eof_ = false;
n = force_eof_position_;
returned_partial_ = true;
}
}
// By using scratch we ensure that caller has control over the
// lifetime of result.data()
memcpy(scratch, contents_.data(), n);
*result = Slice(scratch, n);
contents_.remove_prefix(n);
return Status::OK();
}
virtual Status Skip(uint64_t n) override {
if (n > contents_.size()) {
contents_.clear();
return Status::NotFound("in-memory file skipepd past end");
}
contents_.remove_prefix(n);
return Status::OK();
}
};
class ReportCollector : public Reader::Reporter {
public:
size_t dropped_bytes_;
std::string message_;
ReportCollector() : dropped_bytes_(0) { }
virtual void Corruption(size_t bytes, const Status& status) override {
dropped_bytes_ += bytes;
message_.append(status.ToString());
}
};
std::string& dest_contents() {
auto dest =
dynamic_cast<test::StringSink*>(writer_.file()->writable_file());
assert(dest);
return dest->contents_;
}
const std::string& dest_contents() const {
auto dest =
dynamic_cast<const test::StringSink*>(writer_.file()->writable_file());
assert(dest);
return dest->contents_;
}
void reset_source_contents() {
auto src = dynamic_cast<StringSource*>(reader_.file()->file());
assert(src);
src->contents_ = dest_contents();
}
Slice reader_contents_;
unique_ptr<WritableFileWriter> dest_holder_;
unique_ptr<SequentialFileReader> source_holder_;
ReportCollector report_;
Writer writer_;
Reader reader_;
// Record metadata for testing initial offset functionality
static size_t initial_offset_record_sizes_[];
uint64_t initial_offset_last_record_offsets_[4];
public:
LogTest()
: reader_contents_(),
dest_holder_(test::GetWritableFileWriter(
new test::StringSink(&reader_contents_))),
source_holder_(test::GetSequentialFileReader(
new StringSource(reader_contents_), "" /* file name */)),
writer_(std::move(dest_holder_), 123, GetParam()),
reader_(nullptr, std::move(source_holder_), &report_, true /*checksum*/,
0 /*initial_offset*/, 123) {
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
initial_offset_last_record_offsets_[0] = 0;
initial_offset_last_record_offsets_[1] = header_size + 10000;
initial_offset_last_record_offsets_[2] = 2 * (header_size + 10000);
initial_offset_last_record_offsets_[3] = 2 * (header_size + 10000) +
(2 * log::kBlockSize - 1000) +
3 * header_size;
}
Slice* get_reader_contents() { return &reader_contents_; }
void Write(const std::string& msg) {
writer_.AddRecord(Slice(msg));
}
size_t WrittenBytes() const {
return dest_contents().size();
}
std::string Read(const WALRecoveryMode wal_recovery_mode =
WALRecoveryMode::kTolerateCorruptedTailRecords) {
std::string scratch;
Slice record;
if (reader_.ReadRecord(&record, &scratch, wal_recovery_mode)) {
return record.ToString();
} else {
return "EOF";
}
}
void IncrementByte(int offset, char delta) {
dest_contents()[offset] += delta;
}
void SetByte(int offset, char new_byte) {
dest_contents()[offset] = new_byte;
}
void ShrinkSize(int bytes) {
auto dest =
dynamic_cast<test::StringSink*>(writer_.file()->writable_file());
assert(dest);
dest->Drop(bytes);
}
void FixChecksum(int header_offset, int len, bool recyclable) {
// Compute crc of type/len/data
int header_size = recyclable ? kRecyclableHeaderSize : kHeaderSize;
uint32_t crc = crc32c::Value(&dest_contents()[header_offset + 6],
header_size - 6 + len);
crc = crc32c::Mask(crc);
EncodeFixed32(&dest_contents()[header_offset], crc);
}
void ForceError(size_t position = 0) {
auto src = dynamic_cast<StringSource*>(reader_.file()->file());
src->force_error_ = true;
src->force_error_position_ = position;
}
size_t DroppedBytes() const {
return report_.dropped_bytes_;
}
std::string ReportMessage() const {
return report_.message_;
}
void ForceEOF(size_t position = 0) {
auto src = dynamic_cast<StringSource*>(reader_.file()->file());
src->force_eof_ = true;
src->force_eof_position_ = position;
}
void UnmarkEOF() {
auto src = dynamic_cast<StringSource*>(reader_.file()->file());
src->returned_partial_ = false;
reader_.UnmarkEOF();
}
bool IsEOF() {
return reader_.IsEOF();
}
// Returns OK iff recorded error message contains "msg"
std::string MatchError(const std::string& msg) const {
if (report_.message_.find(msg) == std::string::npos) {
return report_.message_;
} else {
return "OK";
}
}
void WriteInitialOffsetLog() {
for (int i = 0; i < 4; i++) {
std::string record(initial_offset_record_sizes_[i],
static_cast<char>('a' + i));
Write(record);
}
}
void CheckOffsetPastEndReturnsNoRecords(uint64_t offset_past_end) {
WriteInitialOffsetLog();
unique_ptr<SequentialFileReader> file_reader(test::GetSequentialFileReader(
new StringSource(reader_contents_), "" /* fname */));
unique_ptr<Reader> offset_reader(
new Reader(nullptr, std::move(file_reader), &report_,
true /*checksum*/, WrittenBytes() + offset_past_end, 123));
Slice record;
std::string scratch;
ASSERT_TRUE(!offset_reader->ReadRecord(&record, &scratch));
}
void CheckInitialOffsetRecord(uint64_t initial_offset,
int expected_record_offset) {
WriteInitialOffsetLog();
unique_ptr<SequentialFileReader> file_reader(test::GetSequentialFileReader(
new StringSource(reader_contents_), "" /* fname */));
unique_ptr<Reader> offset_reader(
new Reader(nullptr, std::move(file_reader), &report_,
true /*checksum*/, initial_offset, 123));
Slice record;
std::string scratch;
ASSERT_TRUE(offset_reader->ReadRecord(&record, &scratch));
ASSERT_EQ(initial_offset_record_sizes_[expected_record_offset],
record.size());
ASSERT_EQ(initial_offset_last_record_offsets_[expected_record_offset],
offset_reader->LastRecordOffset());
ASSERT_EQ((char)('a' + expected_record_offset), record.data()[0]);
}
};
size_t LogTest::initial_offset_record_sizes_[] =
{10000, // Two sizable records in first block
10000,
2 * log::kBlockSize - 1000, // Span three blocks
1};
TEST_P(LogTest, Empty) { ASSERT_EQ("EOF", Read()); }
TEST_P(LogTest, ReadWrite) {
Write("foo");
Write("bar");
Write("");
Write("xxxx");
ASSERT_EQ("foo", Read());
ASSERT_EQ("bar", Read());
ASSERT_EQ("", Read());
ASSERT_EQ("xxxx", Read());
ASSERT_EQ("EOF", Read());
ASSERT_EQ("EOF", Read()); // Make sure reads at eof work
}
TEST_P(LogTest, ManyBlocks) {
for (int i = 0; i < 100000; i++) {
Write(NumberString(i));
}
for (int i = 0; i < 100000; i++) {
ASSERT_EQ(NumberString(i), Read());
}
ASSERT_EQ("EOF", Read());
}
TEST_P(LogTest, Fragmentation) {
Write("small");
Write(BigString("medium", 50000));
Write(BigString("large", 100000));
ASSERT_EQ("small", Read());
ASSERT_EQ(BigString("medium", 50000), Read());
ASSERT_EQ(BigString("large", 100000), Read());
ASSERT_EQ("EOF", Read());
}
TEST_P(LogTest, MarginalTrailer) {
// Make a trailer that is exactly the same length as an empty record.
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
const int n = kBlockSize - 2 * header_size;
Write(BigString("foo", n));
ASSERT_EQ((unsigned int)(kBlockSize - header_size), WrittenBytes());
Write("");
Write("bar");
ASSERT_EQ(BigString("foo", n), Read());
ASSERT_EQ("", Read());
ASSERT_EQ("bar", Read());
ASSERT_EQ("EOF", Read());
}
TEST_P(LogTest, MarginalTrailer2) {
// Make a trailer that is exactly the same length as an empty record.
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
const int n = kBlockSize - 2 * header_size;
Write(BigString("foo", n));
ASSERT_EQ((unsigned int)(kBlockSize - header_size), WrittenBytes());
Write("bar");
ASSERT_EQ(BigString("foo", n), Read());
ASSERT_EQ("bar", Read());
ASSERT_EQ("EOF", Read());
ASSERT_EQ(0U, DroppedBytes());
ASSERT_EQ("", ReportMessage());
}
TEST_P(LogTest, ShortTrailer) {
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
const int n = kBlockSize - 2 * header_size + 4;
Write(BigString("foo", n));
ASSERT_EQ((unsigned int)(kBlockSize - header_size + 4), WrittenBytes());
Write("");
Write("bar");
ASSERT_EQ(BigString("foo", n), Read());
ASSERT_EQ("", Read());
ASSERT_EQ("bar", Read());
ASSERT_EQ("EOF", Read());
}
TEST_P(LogTest, AlignedEof) {
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
const int n = kBlockSize - 2 * header_size + 4;
Write(BigString("foo", n));
ASSERT_EQ((unsigned int)(kBlockSize - header_size + 4), WrittenBytes());
ASSERT_EQ(BigString("foo", n), Read());
ASSERT_EQ("EOF", Read());
}
TEST_P(LogTest, RandomRead) {
const int N = 500;
Random write_rnd(301);
for (int i = 0; i < N; i++) {
Write(RandomSkewedString(i, &write_rnd));
}
Random read_rnd(301);
for (int i = 0; i < N; i++) {
ASSERT_EQ(RandomSkewedString(i, &read_rnd), Read());
}
ASSERT_EQ("EOF", Read());
}
// Tests of all the error paths in log_reader.cc follow:
TEST_P(LogTest, ReadError) {
Write("foo");
ForceError();
ASSERT_EQ("EOF", Read());
ASSERT_EQ((unsigned int)kBlockSize, DroppedBytes());
ASSERT_EQ("OK", MatchError("read error"));
}
TEST_P(LogTest, BadRecordType) {
Write("foo");
// Type is stored in header[6]
IncrementByte(6, 100);
FixChecksum(0, 3, false);
ASSERT_EQ("EOF", Read());
ASSERT_EQ(3U, DroppedBytes());
ASSERT_EQ("OK", MatchError("unknown record type"));
}
TEST_P(LogTest, TruncatedTrailingRecordIsIgnored) {
Write("foo");
ShrinkSize(4); // Drop all payload as well as a header byte
ASSERT_EQ("EOF", Read());
// Truncated last record is ignored, not treated as an error
ASSERT_EQ(0U, DroppedBytes());
ASSERT_EQ("", ReportMessage());
}
TEST_P(LogTest, TruncatedTrailingRecordIsNotIgnored) {
Write("foo");
ShrinkSize(4); // Drop all payload as well as a header byte
ASSERT_EQ("EOF", Read(WALRecoveryMode::kAbsoluteConsistency));
// Truncated last record is ignored, not treated as an error
ASSERT_GT(DroppedBytes(), 0U);
ASSERT_EQ("OK", MatchError("Corruption: truncated header"));
}
TEST_P(LogTest, BadLength) {
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
const int kPayloadSize = kBlockSize - header_size;
Write(BigString("bar", kPayloadSize));
Write("foo");
// Least significant size byte is stored in header[4].
IncrementByte(4, 1);
if (!GetParam()) {
ASSERT_EQ("foo", Read());
ASSERT_EQ(kBlockSize, DroppedBytes());
ASSERT_EQ("OK", MatchError("bad record length"));
} else {
ASSERT_EQ("EOF", Read());
}
}
TEST_P(LogTest, BadLengthAtEndIsIgnored) {
Write("foo");
ShrinkSize(1);
ASSERT_EQ("EOF", Read());
ASSERT_EQ(0U, DroppedBytes());
ASSERT_EQ("", ReportMessage());
}
TEST_P(LogTest, BadLengthAtEndIsNotIgnored) {
Write("foo");
ShrinkSize(1);
ASSERT_EQ("EOF", Read(WALRecoveryMode::kAbsoluteConsistency));
ASSERT_GT(DroppedBytes(), 0U);
ASSERT_EQ("OK", MatchError("Corruption: truncated header"));
}
TEST_P(LogTest, ChecksumMismatch) {
Write("foooooo");
IncrementByte(0, 14);
ASSERT_EQ("EOF", Read());
if (!GetParam()) {
ASSERT_EQ(14U, DroppedBytes());
ASSERT_EQ("OK", MatchError("checksum mismatch"));
} else {
ASSERT_EQ(0U, DroppedBytes());
ASSERT_EQ("", ReportMessage());
}
}
TEST_P(LogTest, UnexpectedMiddleType) {
Write("foo");
SetByte(6, static_cast<char>(GetParam() ? kRecyclableMiddleType : kMiddleType));
FixChecksum(0, 3, !!GetParam());
ASSERT_EQ("EOF", Read());
ASSERT_EQ(3U, DroppedBytes());
ASSERT_EQ("OK", MatchError("missing start"));
}
TEST_P(LogTest, UnexpectedLastType) {
Write("foo");
SetByte(6, static_cast<char>(GetParam() ? kRecyclableLastType : kLastType));
FixChecksum(0, 3, !!GetParam());
ASSERT_EQ("EOF", Read());
ASSERT_EQ(3U, DroppedBytes());
ASSERT_EQ("OK", MatchError("missing start"));
}
TEST_P(LogTest, UnexpectedFullType) {
Write("foo");
Write("bar");
SetByte(6, static_cast<char>(GetParam() ? kRecyclableFirstType : kFirstType));
FixChecksum(0, 3, !!GetParam());
ASSERT_EQ("bar", Read());
ASSERT_EQ("EOF", Read());
ASSERT_EQ(3U, DroppedBytes());
ASSERT_EQ("OK", MatchError("partial record without end"));
}
TEST_P(LogTest, UnexpectedFirstType) {
Write("foo");
Write(BigString("bar", 100000));
SetByte(6, static_cast<char>(GetParam() ? kRecyclableFirstType : kFirstType));
FixChecksum(0, 3, !!GetParam());
ASSERT_EQ(BigString("bar", 100000), Read());
ASSERT_EQ("EOF", Read());
ASSERT_EQ(3U, DroppedBytes());
ASSERT_EQ("OK", MatchError("partial record without end"));
}
TEST_P(LogTest, MissingLastIsIgnored) {
Write(BigString("bar", kBlockSize));
// Remove the LAST block, including header.
ShrinkSize(14);
ASSERT_EQ("EOF", Read());
ASSERT_EQ("", ReportMessage());
ASSERT_EQ(0U, DroppedBytes());
}
TEST_P(LogTest, MissingLastIsNotIgnored) {
Write(BigString("bar", kBlockSize));
// Remove the LAST block, including header.
ShrinkSize(14);
ASSERT_EQ("EOF", Read(WALRecoveryMode::kAbsoluteConsistency));
ASSERT_GT(DroppedBytes(), 0U);
ASSERT_EQ("OK", MatchError("Corruption: error reading trailing data"));
}
TEST_P(LogTest, PartialLastIsIgnored) {
Write(BigString("bar", kBlockSize));
// Cause a bad record length in the LAST block.
ShrinkSize(1);
ASSERT_EQ("EOF", Read());
ASSERT_EQ("", ReportMessage());
ASSERT_EQ(0U, DroppedBytes());
}
TEST_P(LogTest, PartialLastIsNotIgnored) {
Write(BigString("bar", kBlockSize));
// Cause a bad record length in the LAST block.
ShrinkSize(1);
ASSERT_EQ("EOF", Read(WALRecoveryMode::kAbsoluteConsistency));
ASSERT_GT(DroppedBytes(), 0U);
ASSERT_EQ("OK", MatchError(
"Corruption: truncated headerCorruption: "
"error reading trailing data"));
}
TEST_P(LogTest, ErrorJoinsRecords) {
// Consider two fragmented records:
// first(R1) last(R1) first(R2) last(R2)
// where the middle two fragments disappear. We do not want
// first(R1),last(R2) to get joined and returned as a valid record.
// Write records that span two blocks
Write(BigString("foo", kBlockSize));
Write(BigString("bar", kBlockSize));
Write("correct");
// Wipe the middle block
for (unsigned int offset = kBlockSize; offset < 2*kBlockSize; offset++) {
SetByte(offset, 'x');
}
if (!GetParam()) {
ASSERT_EQ("correct", Read());
ASSERT_EQ("EOF", Read());
size_t dropped = DroppedBytes();
ASSERT_LE(dropped, 2 * kBlockSize + 100);
ASSERT_GE(dropped, 2 * kBlockSize);
} else {
ASSERT_EQ("EOF", Read());
}
}
TEST_P(LogTest, ReadStart) { CheckInitialOffsetRecord(0, 0); }
TEST_P(LogTest, ReadSecondOneOff) { CheckInitialOffsetRecord(1, 1); }
TEST_P(LogTest, ReadSecondTenThousand) { CheckInitialOffsetRecord(10000, 1); }
TEST_P(LogTest, ReadSecondStart) {
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
CheckInitialOffsetRecord(10000 + header_size, 1);
}
TEST_P(LogTest, ReadThirdOneOff) {
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
CheckInitialOffsetRecord(10000 + header_size + 1, 2);
}
TEST_P(LogTest, ReadThirdStart) {
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
CheckInitialOffsetRecord(20000 + 2 * header_size, 2);
}
TEST_P(LogTest, ReadFourthOneOff) {
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
CheckInitialOffsetRecord(20000 + 2 * header_size + 1, 3);
}
TEST_P(LogTest, ReadFourthFirstBlockTrailer) {
CheckInitialOffsetRecord(log::kBlockSize - 4, 3);
}
TEST_P(LogTest, ReadFourthMiddleBlock) {
CheckInitialOffsetRecord(log::kBlockSize + 1, 3);
}
TEST_P(LogTest, ReadFourthLastBlock) {
CheckInitialOffsetRecord(2 * log::kBlockSize + 1, 3);
}
TEST_P(LogTest, ReadFourthStart) {
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
CheckInitialOffsetRecord(
2 * (header_size + 1000) + (2 * log::kBlockSize - 1000) + 3 * header_size,
3);
}
TEST_P(LogTest, ReadEnd) { CheckOffsetPastEndReturnsNoRecords(0); }
TEST_P(LogTest, ReadPastEnd) { CheckOffsetPastEndReturnsNoRecords(5); }
TEST_P(LogTest, ClearEofSingleBlock) {
Write("foo");
Write("bar");
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
ForceEOF(3 + header_size + 2);
ASSERT_EQ("foo", Read());
UnmarkEOF();
ASSERT_EQ("bar", Read());
ASSERT_TRUE(IsEOF());
ASSERT_EQ("EOF", Read());
Write("xxx");
UnmarkEOF();
ASSERT_EQ("xxx", Read());
ASSERT_TRUE(IsEOF());
}
TEST_P(LogTest, ClearEofMultiBlock) {
size_t num_full_blocks = 5;
int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
size_t n = (kBlockSize - header_size) * num_full_blocks + 25;
Write(BigString("foo", n));
Write(BigString("bar", n));
ForceEOF(n + num_full_blocks * header_size + header_size + 3);
ASSERT_EQ(BigString("foo", n), Read());
ASSERT_TRUE(IsEOF());
UnmarkEOF();
ASSERT_EQ(BigString("bar", n), Read());
ASSERT_TRUE(IsEOF());
Write(BigString("xxx", n));
UnmarkEOF();
ASSERT_EQ(BigString("xxx", n), Read());
ASSERT_TRUE(IsEOF());
}
TEST_P(LogTest, ClearEofError) {
// If an error occurs during Read() in UnmarkEOF(), the records contained
// in the buffer should be returned on subsequent calls of ReadRecord()
// until no more full records are left, whereafter ReadRecord() should return
// false to indicate that it cannot read any further.
Write("foo");
Write("bar");
UnmarkEOF();
ASSERT_EQ("foo", Read());
ASSERT_TRUE(IsEOF());
Write("xxx");
ForceError(0);
UnmarkEOF();
ASSERT_EQ("bar", Read());
ASSERT_EQ("EOF", Read());
}
TEST_P(LogTest, ClearEofError2) {
Write("foo");
Write("bar");
UnmarkEOF();
ASSERT_EQ("foo", Read());
Write("xxx");
ForceError(3);
UnmarkEOF();
ASSERT_EQ("bar", Read());
ASSERT_EQ("EOF", Read());
ASSERT_EQ(3U, DroppedBytes());
ASSERT_EQ("OK", MatchError("read error"));
}
TEST_P(LogTest, Recycle) {
if (!GetParam()) {
return; // test is only valid for recycled logs
}
Write("foo");
Write("bar");
Write("baz");
Write("bif");
Write("blitz");
while (get_reader_contents()->size() < log::kBlockSize * 2) {
Write("xxxxxxxxxxxxxxxx");
}
unique_ptr<WritableFileWriter> dest_holder(test::GetWritableFileWriter(
new test::OverwritingStringSink(get_reader_contents())));
Writer recycle_writer(std::move(dest_holder), 123, true);
recycle_writer.AddRecord(Slice("foooo"));
recycle_writer.AddRecord(Slice("bar"));
ASSERT_GE(get_reader_contents()->size(), log::kBlockSize * 2);
ASSERT_EQ("foooo", Read());
ASSERT_EQ("bar", Read());
ASSERT_EQ("EOF", Read());
}
INSTANTIATE_TEST_CASE_P(bool, LogTest, ::testing::Values(0, 2));
} // namespace log
} // namespace rocksdb
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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