mirror of
https://github.com/facebook/rocksdb.git
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3c327ac2d0
Summary: Closes https://github.com/facebook/rocksdb/pull/2589 Differential Revision: D5431502 Pulled By: siying fbshipit-source-id: 8ebf8c87883daa9daa54b2303d11ce01ab1f6f75
740 lines
22 KiB
C++
740 lines
22 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// 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 "db/log_reader.h"
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#include "db/log_writer.h"
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#include "rocksdb/env.h"
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#include "util/coding.h"
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#include "util/crc32c.h"
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#include "util/file_reader_writer.h"
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#include "util/random.h"
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#include "util/testharness.h"
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#include "util/testutil.h"
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namespace rocksdb {
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namespace log {
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// Construct a string of the specified length made out of the supplied
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// partial string.
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static std::string BigString(const std::string& partial_string, size_t n) {
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std::string result;
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while (result.size() < n) {
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result.append(partial_string);
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}
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result.resize(n);
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return result;
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}
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// Construct a string from a number
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static std::string NumberString(int n) {
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char buf[50];
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snprintf(buf, sizeof(buf), "%d.", n);
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return std::string(buf);
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}
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// Return a skewed potentially long string
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static std::string RandomSkewedString(int i, Random* rnd) {
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return BigString(NumberString(i), rnd->Skewed(17));
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}
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class LogTest : public ::testing::TestWithParam<int> {
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private:
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class StringSource : public SequentialFile {
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public:
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Slice& contents_;
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bool force_error_;
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size_t force_error_position_;
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bool force_eof_;
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size_t force_eof_position_;
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bool returned_partial_;
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explicit StringSource(Slice& contents) :
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contents_(contents),
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force_error_(false),
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force_error_position_(0),
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force_eof_(false),
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force_eof_position_(0),
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returned_partial_(false) { }
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virtual Status Read(size_t n, Slice* result, char* scratch) override {
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EXPECT_TRUE(!returned_partial_) << "must not Read() after eof/error";
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if (force_error_) {
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if (force_error_position_ >= n) {
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force_error_position_ -= n;
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} else {
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*result = Slice(contents_.data(), force_error_position_);
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contents_.remove_prefix(force_error_position_);
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force_error_ = false;
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returned_partial_ = true;
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return Status::Corruption("read error");
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}
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}
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if (contents_.size() < n) {
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n = contents_.size();
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returned_partial_ = true;
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}
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if (force_eof_) {
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if (force_eof_position_ >= n) {
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force_eof_position_ -= n;
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} else {
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force_eof_ = false;
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n = force_eof_position_;
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returned_partial_ = true;
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}
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}
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// By using scratch we ensure that caller has control over the
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// lifetime of result.data()
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memcpy(scratch, contents_.data(), n);
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*result = Slice(scratch, n);
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contents_.remove_prefix(n);
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return Status::OK();
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}
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virtual Status Skip(uint64_t n) override {
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if (n > contents_.size()) {
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contents_.clear();
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return Status::NotFound("in-memory file skipepd past end");
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}
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contents_.remove_prefix(n);
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return Status::OK();
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}
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};
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class ReportCollector : public Reader::Reporter {
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public:
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size_t dropped_bytes_;
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std::string message_;
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ReportCollector() : dropped_bytes_(0) { }
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virtual void Corruption(size_t bytes, const Status& status) override {
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dropped_bytes_ += bytes;
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message_.append(status.ToString());
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}
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};
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std::string& dest_contents() {
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auto dest =
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dynamic_cast<test::StringSink*>(writer_.file()->writable_file());
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assert(dest);
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return dest->contents_;
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}
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const std::string& dest_contents() const {
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auto dest =
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dynamic_cast<const test::StringSink*>(writer_.file()->writable_file());
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assert(dest);
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return dest->contents_;
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}
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void reset_source_contents() {
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auto src = dynamic_cast<StringSource*>(reader_.file()->file());
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assert(src);
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src->contents_ = dest_contents();
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}
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Slice reader_contents_;
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unique_ptr<WritableFileWriter> dest_holder_;
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unique_ptr<SequentialFileReader> source_holder_;
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ReportCollector report_;
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Writer writer_;
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Reader reader_;
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// Record metadata for testing initial offset functionality
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static size_t initial_offset_record_sizes_[];
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uint64_t initial_offset_last_record_offsets_[4];
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public:
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LogTest()
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: reader_contents_(),
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dest_holder_(test::GetWritableFileWriter(
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new test::StringSink(&reader_contents_))),
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source_holder_(
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test::GetSequentialFileReader(new StringSource(reader_contents_))),
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writer_(std::move(dest_holder_), 123, GetParam()),
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reader_(NULL, std::move(source_holder_), &report_, true /*checksum*/,
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0 /*initial_offset*/, 123) {
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int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
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initial_offset_last_record_offsets_[0] = 0;
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initial_offset_last_record_offsets_[1] = header_size + 10000;
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initial_offset_last_record_offsets_[2] = 2 * (header_size + 10000);
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initial_offset_last_record_offsets_[3] = 2 * (header_size + 10000) +
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(2 * log::kBlockSize - 1000) +
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3 * header_size;
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}
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Slice* get_reader_contents() { return &reader_contents_; }
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void Write(const std::string& msg) {
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writer_.AddRecord(Slice(msg));
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}
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size_t WrittenBytes() const {
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return dest_contents().size();
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}
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std::string Read(const WALRecoveryMode wal_recovery_mode =
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WALRecoveryMode::kTolerateCorruptedTailRecords) {
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std::string scratch;
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Slice record;
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if (reader_.ReadRecord(&record, &scratch, wal_recovery_mode)) {
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return record.ToString();
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} else {
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return "EOF";
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}
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}
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void IncrementByte(int offset, int delta) {
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dest_contents()[offset] += delta;
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}
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void SetByte(int offset, char new_byte) {
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dest_contents()[offset] = new_byte;
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}
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void ShrinkSize(int bytes) {
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auto dest =
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dynamic_cast<test::StringSink*>(writer_.file()->writable_file());
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assert(dest);
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dest->Drop(bytes);
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}
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void FixChecksum(int header_offset, int len, bool recyclable) {
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// Compute crc of type/len/data
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int header_size = recyclable ? kRecyclableHeaderSize : kHeaderSize;
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uint32_t crc = crc32c::Value(&dest_contents()[header_offset + 6],
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header_size - 6 + len);
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crc = crc32c::Mask(crc);
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EncodeFixed32(&dest_contents()[header_offset], crc);
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}
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void ForceError(size_t position = 0) {
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auto src = dynamic_cast<StringSource*>(reader_.file()->file());
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src->force_error_ = true;
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src->force_error_position_ = position;
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}
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size_t DroppedBytes() const {
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return report_.dropped_bytes_;
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}
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std::string ReportMessage() const {
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return report_.message_;
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}
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void ForceEOF(size_t position = 0) {
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auto src = dynamic_cast<StringSource*>(reader_.file()->file());
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src->force_eof_ = true;
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src->force_eof_position_ = position;
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}
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void UnmarkEOF() {
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auto src = dynamic_cast<StringSource*>(reader_.file()->file());
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src->returned_partial_ = false;
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reader_.UnmarkEOF();
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}
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bool IsEOF() {
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return reader_.IsEOF();
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}
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// Returns OK iff recorded error message contains "msg"
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std::string MatchError(const std::string& msg) const {
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if (report_.message_.find(msg) == std::string::npos) {
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return report_.message_;
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} else {
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return "OK";
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}
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}
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void WriteInitialOffsetLog() {
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for (int i = 0; i < 4; i++) {
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std::string record(initial_offset_record_sizes_[i],
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static_cast<char>('a' + i));
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Write(record);
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}
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}
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void CheckOffsetPastEndReturnsNoRecords(uint64_t offset_past_end) {
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WriteInitialOffsetLog();
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unique_ptr<SequentialFileReader> file_reader(
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test::GetSequentialFileReader(new StringSource(reader_contents_)));
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unique_ptr<Reader> offset_reader(
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new Reader(NULL, std::move(file_reader), &report_,
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true /*checksum*/, WrittenBytes() + offset_past_end, 123));
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Slice record;
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std::string scratch;
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ASSERT_TRUE(!offset_reader->ReadRecord(&record, &scratch));
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}
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void CheckInitialOffsetRecord(uint64_t initial_offset,
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int expected_record_offset) {
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WriteInitialOffsetLog();
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unique_ptr<SequentialFileReader> file_reader(
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test::GetSequentialFileReader(new StringSource(reader_contents_)));
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unique_ptr<Reader> offset_reader(
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new Reader(NULL, std::move(file_reader), &report_,
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true /*checksum*/, initial_offset, 123));
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Slice record;
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std::string scratch;
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ASSERT_TRUE(offset_reader->ReadRecord(&record, &scratch));
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ASSERT_EQ(initial_offset_record_sizes_[expected_record_offset],
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record.size());
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ASSERT_EQ(initial_offset_last_record_offsets_[expected_record_offset],
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offset_reader->LastRecordOffset());
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ASSERT_EQ((char)('a' + expected_record_offset), record.data()[0]);
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}
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};
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size_t LogTest::initial_offset_record_sizes_[] =
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{10000, // Two sizable records in first block
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10000,
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2 * log::kBlockSize - 1000, // Span three blocks
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1};
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TEST_P(LogTest, Empty) { ASSERT_EQ("EOF", Read()); }
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TEST_P(LogTest, ReadWrite) {
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Write("foo");
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Write("bar");
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Write("");
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Write("xxxx");
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ASSERT_EQ("foo", Read());
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ASSERT_EQ("bar", Read());
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ASSERT_EQ("", Read());
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ASSERT_EQ("xxxx", Read());
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ("EOF", Read()); // Make sure reads at eof work
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}
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TEST_P(LogTest, ManyBlocks) {
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for (int i = 0; i < 100000; i++) {
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Write(NumberString(i));
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}
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for (int i = 0; i < 100000; i++) {
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ASSERT_EQ(NumberString(i), Read());
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}
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ASSERT_EQ("EOF", Read());
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}
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TEST_P(LogTest, Fragmentation) {
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Write("small");
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Write(BigString("medium", 50000));
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Write(BigString("large", 100000));
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ASSERT_EQ("small", Read());
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ASSERT_EQ(BigString("medium", 50000), Read());
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ASSERT_EQ(BigString("large", 100000), Read());
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ASSERT_EQ("EOF", Read());
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}
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TEST_P(LogTest, MarginalTrailer) {
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// Make a trailer that is exactly the same length as an empty record.
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int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
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const int n = kBlockSize - 2 * header_size;
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Write(BigString("foo", n));
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ASSERT_EQ((unsigned int)(kBlockSize - header_size), WrittenBytes());
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Write("");
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Write("bar");
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ASSERT_EQ(BigString("foo", n), Read());
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ASSERT_EQ("", Read());
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ASSERT_EQ("bar", Read());
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ASSERT_EQ("EOF", Read());
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}
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TEST_P(LogTest, MarginalTrailer2) {
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// Make a trailer that is exactly the same length as an empty record.
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int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
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const int n = kBlockSize - 2 * header_size;
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Write(BigString("foo", n));
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ASSERT_EQ((unsigned int)(kBlockSize - header_size), WrittenBytes());
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Write("bar");
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ASSERT_EQ(BigString("foo", n), Read());
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ASSERT_EQ("bar", Read());
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ(0U, DroppedBytes());
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ASSERT_EQ("", ReportMessage());
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}
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TEST_P(LogTest, ShortTrailer) {
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int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
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const int n = kBlockSize - 2 * header_size + 4;
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Write(BigString("foo", n));
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ASSERT_EQ((unsigned int)(kBlockSize - header_size + 4), WrittenBytes());
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Write("");
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Write("bar");
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ASSERT_EQ(BigString("foo", n), Read());
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ASSERT_EQ("", Read());
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ASSERT_EQ("bar", Read());
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ASSERT_EQ("EOF", Read());
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}
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TEST_P(LogTest, AlignedEof) {
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int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
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const int n = kBlockSize - 2 * header_size + 4;
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Write(BigString("foo", n));
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ASSERT_EQ((unsigned int)(kBlockSize - header_size + 4), WrittenBytes());
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ASSERT_EQ(BigString("foo", n), Read());
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ASSERT_EQ("EOF", Read());
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}
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TEST_P(LogTest, RandomRead) {
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const int N = 500;
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Random write_rnd(301);
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for (int i = 0; i < N; i++) {
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Write(RandomSkewedString(i, &write_rnd));
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}
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Random read_rnd(301);
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for (int i = 0; i < N; i++) {
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ASSERT_EQ(RandomSkewedString(i, &read_rnd), Read());
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}
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ASSERT_EQ("EOF", Read());
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}
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// Tests of all the error paths in log_reader.cc follow:
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TEST_P(LogTest, ReadError) {
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Write("foo");
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ForceError();
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ((unsigned int)kBlockSize, DroppedBytes());
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ASSERT_EQ("OK", MatchError("read error"));
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}
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TEST_P(LogTest, BadRecordType) {
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Write("foo");
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// Type is stored in header[6]
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IncrementByte(6, 100);
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FixChecksum(0, 3, false);
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ(3U, DroppedBytes());
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ASSERT_EQ("OK", MatchError("unknown record type"));
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}
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TEST_P(LogTest, TruncatedTrailingRecordIsIgnored) {
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Write("foo");
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ShrinkSize(4); // Drop all payload as well as a header byte
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ASSERT_EQ("EOF", Read());
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// Truncated last record is ignored, not treated as an error
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ASSERT_EQ(0U, DroppedBytes());
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ASSERT_EQ("", ReportMessage());
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}
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TEST_P(LogTest, TruncatedTrailingRecordIsNotIgnored) {
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Write("foo");
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ShrinkSize(4); // Drop all payload as well as a header byte
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ASSERT_EQ("EOF", Read(WALRecoveryMode::kAbsoluteConsistency));
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// Truncated last record is ignored, not treated as an error
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ASSERT_GT(DroppedBytes(), 0U);
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ASSERT_EQ("OK", MatchError("Corruption: truncated header"));
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}
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TEST_P(LogTest, BadLength) {
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int header_size = GetParam() ? kRecyclableHeaderSize : kHeaderSize;
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const int kPayloadSize = kBlockSize - header_size;
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Write(BigString("bar", kPayloadSize));
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Write("foo");
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// Least significant size byte is stored in header[4].
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IncrementByte(4, 1);
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if (!GetParam()) {
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ASSERT_EQ("foo", Read());
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ASSERT_EQ(kBlockSize, DroppedBytes());
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ASSERT_EQ("OK", MatchError("bad record length"));
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} else {
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ASSERT_EQ("EOF", Read());
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}
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}
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TEST_P(LogTest, BadLengthAtEndIsIgnored) {
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Write("foo");
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ShrinkSize(1);
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ(0U, DroppedBytes());
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ASSERT_EQ("", ReportMessage());
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}
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TEST_P(LogTest, BadLengthAtEndIsNotIgnored) {
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Write("foo");
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ShrinkSize(1);
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ASSERT_EQ("EOF", Read(WALRecoveryMode::kAbsoluteConsistency));
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ASSERT_GT(DroppedBytes(), 0U);
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ASSERT_EQ("OK", MatchError("Corruption: truncated header"));
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}
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TEST_P(LogTest, ChecksumMismatch) {
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Write("foooooo");
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IncrementByte(0, 14);
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ASSERT_EQ("EOF", Read());
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if (!GetParam()) {
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ASSERT_EQ(14U, DroppedBytes());
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ASSERT_EQ("OK", MatchError("checksum mismatch"));
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} else {
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ASSERT_EQ(0U, DroppedBytes());
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ASSERT_EQ("", ReportMessage());
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}
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}
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TEST_P(LogTest, UnexpectedMiddleType) {
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Write("foo");
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SetByte(6, GetParam() ? kRecyclableMiddleType : kMiddleType);
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FixChecksum(0, 3, !!GetParam());
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ(3U, DroppedBytes());
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ASSERT_EQ("OK", MatchError("missing start"));
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}
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TEST_P(LogTest, UnexpectedLastType) {
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Write("foo");
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SetByte(6, GetParam() ? kRecyclableLastType : kLastType);
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FixChecksum(0, 3, !!GetParam());
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ASSERT_EQ("EOF", Read());
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ASSERT_EQ(3U, DroppedBytes());
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ASSERT_EQ("OK", MatchError("missing start"));
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}
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TEST_P(LogTest, UnexpectedFullType) {
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Write("foo");
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Write("bar");
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SetByte(6, GetParam() ? kRecyclableFirstType : kFirstType);
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FixChecksum(0, 3, !!GetParam());
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ASSERT_EQ("bar", Read());
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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, 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();
|
|
}
|