diff options
Diffstat (limited to 'db/log_test.cc')
| -rw-r--r-- | db/log_test.cc | 342 |
1 files changed, 186 insertions, 156 deletions
diff --git a/db/log_test.cc b/db/log_test.cc index dcf0562..0e31648 100644 --- a/db/log_test.cc +++ b/db/log_test.cc @@ -37,95 +37,29 @@ static std::string RandomSkewedString(int i, Random* rnd) { } class LogTest { - private: - class StringDest : public WritableFile { - public: - std::string contents_; - - virtual Status Close() { return Status::OK(); } - virtual Status Flush() { return Status::OK(); } - virtual Status Sync() { return Status::OK(); } - virtual Status Append(const Slice& slice) { - contents_.append(slice.data(), slice.size()); - return Status::OK(); - } - }; - - class StringSource : public SequentialFile { - public: - Slice contents_; - bool force_error_; - bool returned_partial_; - StringSource() : force_error_(false), returned_partial_(false) { } - - virtual Status Read(size_t n, Slice* result, char* scratch) { - ASSERT_TRUE(!returned_partial_) << "must not Read() after eof/error"; - - if (force_error_) { - force_error_ = false; - returned_partial_ = true; - return Status::Corruption("read error"); - } - - if (contents_.size() < n) { - n = contents_.size(); - returned_partial_ = true; - } - *result = Slice(contents_.data(), n); - contents_.remove_prefix(n); - return Status::OK(); - } - - virtual Status Skip(uint64_t n) { - 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) { - dropped_bytes_ += bytes; - message_.append(status.ToString()); - } - }; - - StringDest dest_; - StringSource source_; - ReportCollector report_; - bool reading_; - Writer writer_; - Reader reader_; - - // Record metadata for testing initial offset functionality - static size_t initial_offset_record_sizes_[]; - static uint64_t initial_offset_last_record_offsets_[]; - public: - LogTest() : reading_(false), - writer_(&dest_), - reader_(&source_, &report_, true/*checksum*/, - 0/*initial_offset*/) { + LogTest() + : reading_(false), + writer_(new Writer(&dest_)), + reader_(new Reader(&source_, &report_, true /*checksum*/, + 0 /*initial_offset*/)) {} + + ~LogTest() { + delete writer_; + delete reader_; + } + + void ReopenForAppend() { + delete writer_; + writer_ = new Writer(&dest_, dest_.contents_.size()); } void Write(const std::string& msg) { ASSERT_TRUE(!reading_) << "Write() after starting to read"; - writer_.AddRecord(Slice(msg)); + writer_->AddRecord(Slice(msg)); } - size_t WrittenBytes() const { - return dest_.contents_.size(); - } + size_t WrittenBytes() const { return dest_.contents_.size(); } std::string Read() { if (!reading_) { @@ -134,7 +68,7 @@ class LogTest { } std::string scratch; Slice record; - if (reader_.ReadRecord(&record, &scratch)) { + if (reader_->ReadRecord(&record, &scratch)) { return record.ToString(); } else { return "EOF"; @@ -155,22 +89,16 @@ class LogTest { void FixChecksum(int header_offset, int len) { // Compute crc of type/len/data - uint32_t crc = crc32c::Value(&dest_.contents_[header_offset+6], 1 + len); + uint32_t crc = crc32c::Value(&dest_.contents_[header_offset + 6], 1 + len); crc = crc32c::Mask(crc); EncodeFixed32(&dest_.contents_[header_offset], crc); } - void ForceError() { - source_.force_error_ = true; - } + void ForceError() { source_.force_error_ = true; } - size_t DroppedBytes() const { - return report_.dropped_bytes_; - } + size_t DroppedBytes() const { return report_.dropped_bytes_; } - std::string ReportMessage() const { - return report_.message_; - } + std::string ReportMessage() const { return report_.message_; } // Returns OK iff recorded error message contains "msg" std::string MatchError(const std::string& msg) const { @@ -182,18 +110,23 @@ class LogTest { } void WriteInitialOffsetLog() { - for (int i = 0; i < 4; i++) { + for (int i = 0; i < num_initial_offset_records_; i++) { std::string record(initial_offset_record_sizes_[i], static_cast<char>('a' + i)); Write(record); } } + void StartReadingAt(uint64_t initial_offset) { + delete reader_; + reader_ = new Reader(&source_, &report_, true /*checksum*/, initial_offset); + } + void CheckOffsetPastEndReturnsNoRecords(uint64_t offset_past_end) { WriteInitialOffsetLog(); reading_ = true; source_.contents_ = Slice(dest_.contents_); - Reader* offset_reader = new Reader(&source_, &report_, true/*checksum*/, + Reader* offset_reader = new Reader(&source_, &report_, true /*checksum*/, WrittenBytes() + offset_past_end); Slice record; std::string scratch; @@ -206,38 +139,126 @@ class LogTest { WriteInitialOffsetLog(); reading_ = true; source_.contents_ = Slice(dest_.contents_); - Reader* offset_reader = new Reader(&source_, &report_, true/*checksum*/, - initial_offset); - 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]); + Reader* offset_reader = + new Reader(&source_, &report_, true /*checksum*/, initial_offset); + + // Read all records from expected_record_offset through the last one. + ASSERT_LT(expected_record_offset, num_initial_offset_records_); + for (; expected_record_offset < num_initial_offset_records_; + ++expected_record_offset) { + 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]); + } delete offset_reader; } + private: + class StringDest : public WritableFile { + public: + Status Close() override { return Status::OK(); } + Status Flush() override { return Status::OK(); } + Status Sync() override { return Status::OK(); } + Status Append(const Slice& slice) override { + contents_.append(slice.data(), slice.size()); + return Status::OK(); + } + + std::string contents_; + }; + + class StringSource : public SequentialFile { + public: + StringSource() : force_error_(false), returned_partial_(false) {} + + Status Read(size_t n, Slice* result, char* scratch) override { + ASSERT_TRUE(!returned_partial_) << "must not Read() after eof/error"; + + if (force_error_) { + force_error_ = false; + returned_partial_ = true; + return Status::Corruption("read error"); + } + + if (contents_.size() < n) { + n = contents_.size(); + returned_partial_ = true; + } + *result = Slice(contents_.data(), n); + contents_.remove_prefix(n); + return Status::OK(); + } + + Status Skip(uint64_t n) override { + if (n > contents_.size()) { + contents_.clear(); + return Status::NotFound("in-memory file skipped past end"); + } + + contents_.remove_prefix(n); + + return Status::OK(); + } + + Slice contents_; + bool force_error_; + bool returned_partial_; + }; + + class ReportCollector : public Reader::Reporter { + public: + ReportCollector() : dropped_bytes_(0) {} + void Corruption(size_t bytes, const Status& status) override { + dropped_bytes_ += bytes; + message_.append(status.ToString()); + } + + size_t dropped_bytes_; + std::string message_; + }; + + // Record metadata for testing initial offset functionality + static size_t initial_offset_record_sizes_[]; + static uint64_t initial_offset_last_record_offsets_[]; + static int num_initial_offset_records_; + + StringDest dest_; + StringSource source_; + ReportCollector report_; + bool reading_; + Writer* writer_; + Reader* reader_; }; -size_t LogTest::initial_offset_record_sizes_[] = - {10000, // Two sizable records in first block - 10000, - 2 * log::kBlockSize - 1000, // Span three blocks - 1}; +size_t LogTest::initial_offset_record_sizes_[] = { + 10000, // Two sizable records in first block + 10000, + 2 * log::kBlockSize - 1000, // Span three blocks + 1, + 13716, // Consume all but two bytes of block 3. + log::kBlockSize - kHeaderSize, // Consume the entirety of block 4. +}; -uint64_t LogTest::initial_offset_last_record_offsets_[] = - {0, - kHeaderSize + 10000, - 2 * (kHeaderSize + 10000), - 2 * (kHeaderSize + 10000) + - (2 * log::kBlockSize - 1000) + 3 * kHeaderSize}; +uint64_t LogTest::initial_offset_last_record_offsets_[] = { + 0, + kHeaderSize + 10000, + 2 * (kHeaderSize + 10000), + 2 * (kHeaderSize + 10000) + (2 * log::kBlockSize - 1000) + 3 * kHeaderSize, + 2 * (kHeaderSize + 10000) + (2 * log::kBlockSize - 1000) + 3 * kHeaderSize + + kHeaderSize + 1, + 3 * log::kBlockSize, +}; +// LogTest::initial_offset_last_record_offsets_ must be defined before this. +int LogTest::num_initial_offset_records_ = + sizeof(LogTest::initial_offset_last_record_offsets_) / sizeof(uint64_t); -TEST(LogTest, Empty) { - ASSERT_EQ("EOF", Read()); -} +TEST(LogTest, Empty) { ASSERT_EQ("EOF", Read()); } TEST(LogTest, ReadWrite) { Write("foo"); @@ -274,7 +295,7 @@ TEST(LogTest, Fragmentation) { TEST(LogTest, MarginalTrailer) { // Make a trailer that is exactly the same length as an empty record. - const int n = kBlockSize - 2*kHeaderSize; + const int n = kBlockSize - 2 * kHeaderSize; Write(BigString("foo", n)); ASSERT_EQ(kBlockSize - kHeaderSize, WrittenBytes()); Write(""); @@ -287,7 +308,7 @@ TEST(LogTest, MarginalTrailer) { TEST(LogTest, MarginalTrailer2) { // Make a trailer that is exactly the same length as an empty record. - const int n = kBlockSize - 2*kHeaderSize; + const int n = kBlockSize - 2 * kHeaderSize; Write(BigString("foo", n)); ASSERT_EQ(kBlockSize - kHeaderSize, WrittenBytes()); Write("bar"); @@ -299,7 +320,7 @@ TEST(LogTest, MarginalTrailer2) { } TEST(LogTest, ShortTrailer) { - const int n = kBlockSize - 2*kHeaderSize + 4; + const int n = kBlockSize - 2 * kHeaderSize + 4; Write(BigString("foo", n)); ASSERT_EQ(kBlockSize - kHeaderSize + 4, WrittenBytes()); Write(""); @@ -311,13 +332,22 @@ TEST(LogTest, ShortTrailer) { } TEST(LogTest, AlignedEof) { - const int n = kBlockSize - 2*kHeaderSize + 4; + const int n = kBlockSize - 2 * kHeaderSize + 4; Write(BigString("foo", n)); ASSERT_EQ(kBlockSize - kHeaderSize + 4, WrittenBytes()); ASSERT_EQ(BigString("foo", n), Read()); ASSERT_EQ("EOF", Read()); } +TEST(LogTest, OpenForAppend) { + Write("hello"); + ReopenForAppend(); + Write("world"); + ASSERT_EQ("hello", Read()); + ASSERT_EQ("world", Read()); + ASSERT_EQ("EOF", Read()); +} + TEST(LogTest, RandomRead) { const int N = 500; Random write_rnd(301); @@ -353,7 +383,7 @@ TEST(LogTest, BadRecordType) { TEST(LogTest, TruncatedTrailingRecordIsIgnored) { Write("foo"); - ShrinkSize(4); // Drop all payload as well as a header byte + 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(0, DroppedBytes()); @@ -445,6 +475,22 @@ TEST(LogTest, PartialLastIsIgnored) { ASSERT_EQ(0, DroppedBytes()); } +TEST(LogTest, SkipIntoMultiRecord) { + // Consider a fragmented record: + // first(R1), middle(R1), last(R1), first(R2) + // If initial_offset points to a record after first(R1) but before first(R2) + // incomplete fragment errors are not actual errors, and must be suppressed + // until a new first or full record is encountered. + Write(BigString("foo", 3 * kBlockSize)); + Write("correct"); + StartReadingAt(kBlockSize); + + ASSERT_EQ("correct", Read()); + ASSERT_EQ("", ReportMessage()); + ASSERT_EQ(0, DroppedBytes()); + ASSERT_EQ("EOF", Read()); +} + TEST(LogTest, ErrorJoinsRecords) { // Consider two fragmented records: // first(R1) last(R1) first(R2) last(R2) @@ -457,44 +503,30 @@ TEST(LogTest, ErrorJoinsRecords) { Write("correct"); // Wipe the middle block - for (int offset = kBlockSize; offset < 2*kBlockSize; offset++) { + for (int offset = kBlockSize; offset < 2 * kBlockSize; offset++) { SetByte(offset, 'x'); } ASSERT_EQ("correct", Read()); ASSERT_EQ("EOF", Read()); const size_t dropped = DroppedBytes(); - ASSERT_LE(dropped, 2*kBlockSize + 100); - ASSERT_GE(dropped, 2*kBlockSize); + ASSERT_LE(dropped, 2 * kBlockSize + 100); + ASSERT_GE(dropped, 2 * kBlockSize); } -TEST(LogTest, ReadStart) { - CheckInitialOffsetRecord(0, 0); -} +TEST(LogTest, ReadStart) { CheckInitialOffsetRecord(0, 0); } -TEST(LogTest, ReadSecondOneOff) { - CheckInitialOffsetRecord(1, 1); -} +TEST(LogTest, ReadSecondOneOff) { CheckInitialOffsetRecord(1, 1); } -TEST(LogTest, ReadSecondTenThousand) { - CheckInitialOffsetRecord(10000, 1); -} +TEST(LogTest, ReadSecondTenThousand) { CheckInitialOffsetRecord(10000, 1); } -TEST(LogTest, ReadSecondStart) { - CheckInitialOffsetRecord(10007, 1); -} +TEST(LogTest, ReadSecondStart) { CheckInitialOffsetRecord(10007, 1); } -TEST(LogTest, ReadThirdOneOff) { - CheckInitialOffsetRecord(10008, 2); -} +TEST(LogTest, ReadThirdOneOff) { CheckInitialOffsetRecord(10008, 2); } -TEST(LogTest, ReadThirdStart) { - CheckInitialOffsetRecord(20014, 2); -} +TEST(LogTest, ReadThirdStart) { CheckInitialOffsetRecord(20014, 2); } -TEST(LogTest, ReadFourthOneOff) { - CheckInitialOffsetRecord(20015, 3); -} +TEST(LogTest, ReadFourthOneOff) { CheckInitialOffsetRecord(20015, 3); } TEST(LogTest, ReadFourthFirstBlockTrailer) { CheckInitialOffsetRecord(log::kBlockSize - 4, 3); @@ -514,17 +546,15 @@ TEST(LogTest, ReadFourthStart) { 3); } -TEST(LogTest, ReadEnd) { - CheckOffsetPastEndReturnsNoRecords(0); +TEST(LogTest, ReadInitialOffsetIntoBlockPadding) { + CheckInitialOffsetRecord(3 * log::kBlockSize - 3, 5); } -TEST(LogTest, ReadPastEnd) { - CheckOffsetPastEndReturnsNoRecords(5); -} +TEST(LogTest, ReadEnd) { CheckOffsetPastEndReturnsNoRecords(0); } + +TEST(LogTest, ReadPastEnd) { CheckOffsetPastEndReturnsNoRecords(5); } } // namespace log } // namespace leveldb -int main(int argc, char** argv) { - return leveldb::test::RunAllTests(); -} +int main(int argc, char** argv) { return leveldb::test::RunAllTests(); } |