test/test_fru-utils.cpp - openbmc/entity-manager - Gitiles

 #include "fru_utils.hpp"

 #include <algorithm>
 #include <array>
 #include <iterator>

 #include "gtest/gtest.h"

 static constexpr size_t blockSize = I2C_SMBUS_BLOCK_MAX;

 TEST(ValidateIPMIHeaderTest, InvalidFruVersionReturnsFalse)
 {
     // Validates the FruVersion is checked for the only legal value.
     const std::vector<uint8_t> fruHeader = {0x00, 0x00, 0x00, 0x00,
                                             0x00, 0x00, 0x00, 0x00};

     EXPECT_FALSE(validateIPMIHeader(fruHeader));
 }

 TEST(ValidateIPMIHeaderTest, InvalidReservedReturnsFalse)
 {
     // Validates the reserved bit(7:4) of first bytes.
     const std::vector<uint8_t> fruHeader = {0xf0, 0x00, 0x00, 0x00,
                                             0x00, 0x00, 0x00, 0x00};

     EXPECT_FALSE(validateIPMIHeader(fruHeader));
 }

 TEST(ValidateIPMIHeaderTest, InvalidPaddingReturnsFalse)
 {
     // Validates the padding byte (7th byte).
     const std::vector<uint8_t> fruHeader = {0x00, 0x00, 0x00, 0x00,
                                             0x00, 0x00, 0x01, 0x00};

     EXPECT_FALSE(validateIPMIHeader(fruHeader));
 }

 TEST(ValidateIPMIHeaderTest, InvalidChecksumReturnsFalse)
 {
     // Validates the checksum, check for incorrect value.
     const std::vector<uint8_t> fruHeader = {0x01, 0x00, 0x01, 0x02,
                                             0x03, 0x04, 0x00, 0x00};

     EXPECT_FALSE(validateIPMIHeader(fruHeader));
 }

 TEST(ValidateIPMIHeaderTest, ValidChecksumReturnsTrue)
 {
     // Validates the checksum, check for correct value.
     const std::vector<uint8_t> fruHeader = {0x01, 0x00, 0x01, 0x02,
                                             0x03, 0x04, 0x00, 0xf5};

     EXPECT_TRUE(validateIPMIHeader(fruHeader));
 }

 TEST(VerifyOffsetTest, EmptyFruDataReturnsFalse)
 {
     // Validates the FruData size is checked for non empty.
     std::vector<uint8_t> fruData = {};

     EXPECT_FALSE(verifyOffset(fruData, fruAreas::fruAreaChassis, 0));
 }

 TEST(VerifyOffsetTest, AreaOutOfRangeReturnsFalse)
 {
     // Validates the FruArea value, check if it is within range.
     const std::vector<uint8_t> fruData = {0x01, 0x00, 0x00, 0x00, 0x00,
                                           0x00, 0x00, 0x00, 0x00};

     unsigned int areaOutOfRange = 8;
     EXPECT_FALSE(
         verifyOffset(fruData, static_cast<fruAreas>(areaOutOfRange), 0));
 }

 TEST(VerifyOffsetTest, OverlapNextAreaReturnsFalse)
 {
     // Validates the Overlap of offsets with overlapped values.
     const std::vector<uint8_t> fruData = {0x01, 0x00, 0x01, 0x02, 0x03,
                                           0x04, 0x00, 0x00, 0x00};

     EXPECT_FALSE(verifyOffset(fruData, fruAreas::fruAreaChassis, 2));
 }

 TEST(VerifyOffsetTest, OverlapPrevAreaReturnsFalse)
 {
     // Validates the Overlap of offsets with overlapped values.
     const std::vector<uint8_t> fruData = {0x01, 0x00, 0x01, 0x03, 0x02,
                                           0x07, 0x00, 0x00, 0x00};

     EXPECT_FALSE(verifyOffset(fruData, fruAreas::fruAreaProduct, 2));
 }

 TEST(VerifyOffsetTest, ValidInputDataNoOverlapReturnsTrue)
 {
     // Validates all inputs with expected value and no overlap.
     const std::vector<uint8_t> fruData = {0x01, 0x00, 0x01, 0x02, 0x03,
                                           0x04, 0x00, 0x00, 0x00};

     EXPECT_TRUE(verifyOffset(fruData, fruAreas::fruAreaChassis, 1));
 }

 TEST(VerifyChecksumTest, EmptyInput)
 {
     std::vector<uint8_t> data = {};

     EXPECT_EQ(calculateChecksum(data), 0);
 }

 TEST(VerifyChecksumTest, SingleOneInput)
 {
     std::vector<uint8_t> data(1, 1);

     EXPECT_EQ(calculateChecksum(data), 255);
 }

 TEST(VerifyChecksumTest, AllOneInput)
 {
     std::vector<uint8_t> data(256, 1);

     EXPECT_EQ(calculateChecksum(data), 0);
 }

 TEST(VerifyChecksumTest, WrapBoundaryLow)
 {
     std::vector<uint8_t> data = {255, 0};

     EXPECT_EQ(calculateChecksum(data), 1);
 }

 TEST(VerifyChecksumTest, WrapBoundaryExact)
 {
     std::vector<uint8_t> data = {255, 1};

     EXPECT_EQ(calculateChecksum(data), 0);
 }

 TEST(VerifyChecksumTest, WrapBoundaryHigh)
 {
     std::vector<uint8_t> data = {255, 2};

     EXPECT_EQ(calculateChecksum(data), 255);
 }

 int64_t getDataTempl(const std::vector<uint8_t>& data, off_t offset,
                      size_t length, uint8_t* outBuf)
 {
     if (offset >= static_cast<off_t>(data.size()))
     {
         return 0;
     }

     uint16_t idx = offset;
     // NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
     for (; idx < std::min(data.size(), offset + length); ++idx, ++outBuf)
     {
         *outBuf = data[idx];
     }

     return idx - offset;
 }

 TEST(FRUReaderTest, ReadData)
 {
     std::vector<uint8_t> data = {};
     for (size_t i = 0; i < blockSize * 2; i++)
     {
         data.push_back(i);
     }
     std::array<uint8_t, blockSize * 2> rdbuf{};
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_EQ(reader.read(0, data.size(), rdbuf.data()),
               static_cast<ssize_t>(data.size()));
     EXPECT_TRUE(std::equal(rdbuf.begin(), rdbuf.end(), data.begin()));
     for (size_t i = 0; i < blockSize * 2; i++)
     {
         EXPECT_EQ(reader.read(i, 1, rdbuf.data()), 1);
         EXPECT_EQ(rdbuf[i], i);
     }
     EXPECT_EQ(reader.read(blockSize - 1, 2, rdbuf.data()), 2);
     EXPECT_EQ(rdbuf[0], blockSize - 1);
     EXPECT_EQ(rdbuf[1], blockSize);
 }

 TEST(FRUReaderTest, StartPastUnknownEOF)
 {
     const std::vector<uint8_t> data = {};
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_EQ(reader.read(1, 1, nullptr), 0);
 }

 TEST(FRUReaderTest, StartPastKnownEOF)
 {
     std::vector<uint8_t> data = {};
     data.resize(blockSize / 2);
     std::array<uint8_t, blockSize> blockData{};
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_EQ(reader.read(0, blockSize, blockData.data()),
               static_cast<ssize_t>(data.size()));
     EXPECT_EQ(reader.read(data.size(), 1, nullptr), 0);
     EXPECT_EQ(reader.read(data.size() + 1, 1, nullptr), 0);
     EXPECT_EQ(reader.read(blockSize, 1, nullptr), 0);
     EXPECT_EQ(reader.read(blockSize + 1, 1, nullptr), 0);
 }

 TEST(FRUReaderTest, DecreasingEOF)
 {
     const std::vector<uint8_t> data = {};
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_EQ(reader.read(blockSize * 2, 1, nullptr), 0);
     EXPECT_EQ(reader.read(blockSize + (blockSize / 2), 1, nullptr), 0);
     EXPECT_EQ(reader.read(blockSize, 1, nullptr), 0);
     EXPECT_EQ(reader.read(blockSize / 2, 1, nullptr), 0);
     EXPECT_EQ(reader.read(0, 1, nullptr), 0);
 }

 TEST(FRUReaderTest, CacheHit)
 {
     std::vector<uint8_t> data = {'X'};
     std::array<uint8_t, blockSize> read1{};
     std::array<uint8_t, blockSize> read2{};
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     // cache hit should return the same data for the second read even if we
     // change it behind the FRUReader's back after the first
     EXPECT_EQ(reader.read(0, blockSize, read1.data()), 1);
     data[0] = 'Y';
     EXPECT_EQ(reader.read(0, blockSize, read2.data()), 1);
     EXPECT_EQ(read1[0], read2[0]);
 }

 TEST(FRUReaderTest, ReadPastKnownEnd)
 {
     const std::vector<uint8_t> data = {'X', 'Y'};
     std::array<uint8_t, blockSize> rdbuf{};
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_EQ(reader.read(0, data.size(), rdbuf.data()),
               static_cast<ssize_t>(data.size()));
     EXPECT_EQ(rdbuf[0], 'X');
     EXPECT_EQ(rdbuf[1], 'Y');
     EXPECT_EQ(reader.read(1, data.size(), rdbuf.data()),
               static_cast<ssize_t>(data.size() - 1));
     EXPECT_EQ(rdbuf[0], 'Y');
 }

 TEST(FRUReaderTest, MultiBlockRead)
 {
     std::vector<uint8_t> data = {};
     data.resize(blockSize, 'X');
     data.resize(2 * blockSize, 'Y');
     std::array<uint8_t, 2 * blockSize> rdbuf{};
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_EQ(reader.read(0, 2 * blockSize, rdbuf.data()),
               static_cast<ssize_t>(2 * blockSize));
     EXPECT_TRUE(std::equal(rdbuf.begin(), rdbuf.end(), data.begin()));
 }

 TEST(FRUReaderTest, ShrinkingEEPROM)
 {
     std::vector<uint8_t> data = {};
     data.resize(3 * blockSize, 'X');
     std::array<uint8_t, blockSize> rdbuf{};
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_EQ(reader.read(data.size() - 1, 2, rdbuf.data()), 1);
     data.resize(blockSize);
     EXPECT_EQ(reader.read(data.size() - 1, 2, rdbuf.data()), 1);
 }

 static constexpr auto testFRUData = std::to_array<uint8_t>({
     0x01, 0x00, 0x01, 0x05, 0x0d, 0x00, 0x00, 0xec, 0x01, 0x04, 0x11, 0xd1,
     0x4f, 0x42, 0x4d, 0x43, 0x5f, 0x54, 0x45, 0x53, 0x54, 0x5f, 0x43, 0x48,
     0x41, 0x53, 0x53, 0x49, 0x53, 0xc6, 0x58, 0x59, 0x5a, 0x31, 0x32, 0x33,
     0xc1, 0x00, 0x00, 0xc4, 0x01, 0x08, 0x19, 0xd8, 0xe7, 0xd1, 0xcf, 0x4f,
     0x70, 0x65, 0x6e, 0x42, 0x4d, 0x43, 0x20, 0x50, 0x72, 0x6f, 0x6a, 0x65,
     0x63, 0x74, 0xcf, 0x4f, 0x42, 0x4d, 0x43, 0x5f, 0x54, 0x45, 0x53, 0x54,
     0x5f, 0x42, 0x4f, 0x41, 0x52, 0x44, 0xc6, 0x41, 0x42, 0x43, 0x30, 0x31,
     0x32, 0xcd, 0x42, 0x4f, 0x41, 0x52, 0x44, 0x5f, 0x50, 0x41, 0x52, 0x54,
     0x4e, 0x55, 0x4d, 0xc0, 0xc1, 0x00, 0x00, 0x73, 0x01, 0x06, 0x19, 0xcf,
     0x4f, 0x70, 0x65, 0x6e, 0x42, 0x4d, 0x43, 0x20, 0x50, 0x72, 0x6f, 0x6a,
     0x65, 0x63, 0x74, 0xd1, 0x4f, 0x42, 0x4d, 0x43, 0x5f, 0x54, 0x45, 0x53,
     0x54, 0x5f, 0x50, 0x52, 0x4f, 0x44, 0x55, 0x43, 0x54, 0xc0, 0xc0, 0xc4,
     0x39, 0x39, 0x39, 0x39, 0xc0, 0xc0, 0xc1, 0x3c,
 });

 TEST(ReadFRUContentsTest, InvalidHeader)
 {
     const std::vector<uint8_t> data = {255, 16};
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_TRUE(readFRUContents(reader, "error").empty());
 }

 TEST(ReadFRUContentsTest, NoData)
 {
     const std::vector<uint8_t> data = {};
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_TRUE(readFRUContents(reader, "error").empty());
 }

 TEST(ReadFRUContentsTest, IPMIValidData)
 {
     const std::vector<uint8_t> data(testFRUData.begin(), testFRUData.end());
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_EQ(readFRUContents(reader, "error"), data);
 }

 TEST(ReadFRUContentsTest, IPMIInvalidData)
 {
     std::vector<uint8_t> data(testFRUData.begin(), testFRUData.end());
     // corrupt a byte to throw off the checksum
     data[7] ^= 0xff;
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_TRUE(readFRUContents(reader, "error").empty());
 }

 TEST(ReadFRUContentsTest, TyanInvalidHeader)
 {
     std::vector<uint8_t> data = {'$', 'T', 'Y', 'A', 'N', '$', 0, 0};
     data.resize(0x6000 + 32);
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_TRUE(readFRUContents(reader, "error").empty());
 }

 TEST(ReadFRUContentsTest, TyanNoData)
 {
     const std::vector<uint8_t> data = {'$', 'T', 'Y', 'A', 'N', '$', 0, 0};
     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     EXPECT_TRUE(readFRUContents(reader, "error").empty());
 }

 TEST(ReadFRUContentsTest, TyanValidData)
 {
     std::vector<uint8_t> data = {'$', 'T', 'Y', 'A', 'N', '$', 0, 0};
     data.resize(0x6000);
     copy(testFRUData.begin(), testFRUData.end(), back_inserter(data));

     auto getData = [&data](auto o, auto l, auto* b) {
         return getDataTempl(data, o, l, b);
     };
     FRUReader reader(getData);

     std::vector<uint8_t> device = readFRUContents(reader, "error");
     EXPECT_TRUE(std::equal(device.begin(), device.end(), testFRUData.begin()));
 }
	#include "fru_utils.hpp"

	#include <algorithm>
	#include <array>
	#include <iterator>

	#include "gtest/gtest.h"

	static constexpr size_t blockSize = I2C_SMBUS_BLOCK_MAX;

	TEST(ValidateIPMIHeaderTest, InvalidFruVersionReturnsFalse)
	{
	// Validates the FruVersion is checked for the only legal value.
	const std::vector<uint8_t> fruHeader = {0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00};

	EXPECT_FALSE(validateIPMIHeader(fruHeader));
	}

	TEST(ValidateIPMIHeaderTest, InvalidReservedReturnsFalse)
	{
	// Validates the reserved bit(7:4) of first bytes.
	const std::vector<uint8_t> fruHeader = {0xf0, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00};

	EXPECT_FALSE(validateIPMIHeader(fruHeader));
	}

	TEST(ValidateIPMIHeaderTest, InvalidPaddingReturnsFalse)
	{
	// Validates the padding byte (7th byte).
	const std::vector<uint8_t> fruHeader = {0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x01, 0x00};

	EXPECT_FALSE(validateIPMIHeader(fruHeader));
	}

	TEST(ValidateIPMIHeaderTest, InvalidChecksumReturnsFalse)
	{
	// Validates the checksum, check for incorrect value.
	const std::vector<uint8_t> fruHeader = {0x01, 0x00, 0x01, 0x02,
	0x03, 0x04, 0x00, 0x00};

	EXPECT_FALSE(validateIPMIHeader(fruHeader));
	}

	TEST(ValidateIPMIHeaderTest, ValidChecksumReturnsTrue)
	{
	// Validates the checksum, check for correct value.
	const std::vector<uint8_t> fruHeader = {0x01, 0x00, 0x01, 0x02,
	0x03, 0x04, 0x00, 0xf5};

	EXPECT_TRUE(validateIPMIHeader(fruHeader));
	}

	TEST(VerifyOffsetTest, EmptyFruDataReturnsFalse)
	{
	// Validates the FruData size is checked for non empty.
	std::vector<uint8_t> fruData = {};

	EXPECT_FALSE(verifyOffset(fruData, fruAreas::fruAreaChassis, 0));
	}

	TEST(VerifyOffsetTest, AreaOutOfRangeReturnsFalse)
	{
	// Validates the FruArea value, check if it is within range.
	const std::vector<uint8_t> fruData = {0x01, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00};

	unsigned int areaOutOfRange = 8;
	EXPECT_FALSE(
	verifyOffset(fruData, static_cast<fruAreas>(areaOutOfRange), 0));
	}

	TEST(VerifyOffsetTest, OverlapNextAreaReturnsFalse)
	{
	// Validates the Overlap of offsets with overlapped values.
	const std::vector<uint8_t> fruData = {0x01, 0x00, 0x01, 0x02, 0x03,
	0x04, 0x00, 0x00, 0x00};

	EXPECT_FALSE(verifyOffset(fruData, fruAreas::fruAreaChassis, 2));
	}

	TEST(VerifyOffsetTest, OverlapPrevAreaReturnsFalse)
	{
	// Validates the Overlap of offsets with overlapped values.
	const std::vector<uint8_t> fruData = {0x01, 0x00, 0x01, 0x03, 0x02,
	0x07, 0x00, 0x00, 0x00};

	EXPECT_FALSE(verifyOffset(fruData, fruAreas::fruAreaProduct, 2));
	}

	TEST(VerifyOffsetTest, ValidInputDataNoOverlapReturnsTrue)
	{
	// Validates all inputs with expected value and no overlap.
	const std::vector<uint8_t> fruData = {0x01, 0x00, 0x01, 0x02, 0x03,
	0x04, 0x00, 0x00, 0x00};

	EXPECT_TRUE(verifyOffset(fruData, fruAreas::fruAreaChassis, 1));
	}

	TEST(VerifyChecksumTest, EmptyInput)
	{
	std::vector<uint8_t> data = {};

	EXPECT_EQ(calculateChecksum(data), 0);
	}

	TEST(VerifyChecksumTest, SingleOneInput)
	{
	std::vector<uint8_t> data(1, 1);

	EXPECT_EQ(calculateChecksum(data), 255);
	}

	TEST(VerifyChecksumTest, AllOneInput)
	{
	std::vector<uint8_t> data(256, 1);

	EXPECT_EQ(calculateChecksum(data), 0);
	}

	TEST(VerifyChecksumTest, WrapBoundaryLow)
	{
	std::vector<uint8_t> data = {255, 0};

	EXPECT_EQ(calculateChecksum(data), 1);
	}

	TEST(VerifyChecksumTest, WrapBoundaryExact)
	{
	std::vector<uint8_t> data = {255, 1};

	EXPECT_EQ(calculateChecksum(data), 0);
	}

	TEST(VerifyChecksumTest, WrapBoundaryHigh)
	{
	std::vector<uint8_t> data = {255, 2};

	EXPECT_EQ(calculateChecksum(data), 255);
	}

	int64_t getDataTempl(const std::vector<uint8_t>& data, off_t offset,
	size_t length, uint8_t* outBuf)
	{
	if (offset >= static_cast<off_t>(data.size()))
	{
	return 0;
	}

	uint16_t idx = offset;
	// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
	for (; idx < std::min(data.size(), offset + length); ++idx, ++outBuf)
	{
	*outBuf = data[idx];
	}

	return idx - offset;
	}

	TEST(FRUReaderTest, ReadData)
	{
	std::vector<uint8_t> data = {};
	for (size_t i = 0; i < blockSize * 2; i++)
	{
	data.push_back(i);
	}
	std::array<uint8_t, blockSize * 2> rdbuf{};
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_EQ(reader.read(0, data.size(), rdbuf.data()),
	static_cast<ssize_t>(data.size()));
	EXPECT_TRUE(std::equal(rdbuf.begin(), rdbuf.end(), data.begin()));
	for (size_t i = 0; i < blockSize * 2; i++)
	{
	EXPECT_EQ(reader.read(i, 1, rdbuf.data()), 1);
	EXPECT_EQ(rdbuf[i], i);
	}
	EXPECT_EQ(reader.read(blockSize - 1, 2, rdbuf.data()), 2);
	EXPECT_EQ(rdbuf[0], blockSize - 1);
	EXPECT_EQ(rdbuf[1], blockSize);
	}

	TEST(FRUReaderTest, StartPastUnknownEOF)
	{
	const std::vector<uint8_t> data = {};
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_EQ(reader.read(1, 1, nullptr), 0);
	}

	TEST(FRUReaderTest, StartPastKnownEOF)
	{
	std::vector<uint8_t> data = {};
	data.resize(blockSize / 2);
	std::array<uint8_t, blockSize> blockData{};
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_EQ(reader.read(0, blockSize, blockData.data()),
	static_cast<ssize_t>(data.size()));
	EXPECT_EQ(reader.read(data.size(), 1, nullptr), 0);
	EXPECT_EQ(reader.read(data.size() + 1, 1, nullptr), 0);
	EXPECT_EQ(reader.read(blockSize, 1, nullptr), 0);
	EXPECT_EQ(reader.read(blockSize + 1, 1, nullptr), 0);
	}

	TEST(FRUReaderTest, DecreasingEOF)
	{
	const std::vector<uint8_t> data = {};
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_EQ(reader.read(blockSize * 2, 1, nullptr), 0);
	EXPECT_EQ(reader.read(blockSize + (blockSize / 2), 1, nullptr), 0);
	EXPECT_EQ(reader.read(blockSize, 1, nullptr), 0);
	EXPECT_EQ(reader.read(blockSize / 2, 1, nullptr), 0);
	EXPECT_EQ(reader.read(0, 1, nullptr), 0);
	}

	TEST(FRUReaderTest, CacheHit)
	{
	std::vector<uint8_t> data = {'X'};
	std::array<uint8_t, blockSize> read1{};
	std::array<uint8_t, blockSize> read2{};
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	// cache hit should return the same data for the second read even if we
	// change it behind the FRUReader's back after the first
	EXPECT_EQ(reader.read(0, blockSize, read1.data()), 1);
	data[0] = 'Y';
	EXPECT_EQ(reader.read(0, blockSize, read2.data()), 1);
	EXPECT_EQ(read1[0], read2[0]);
	}

	TEST(FRUReaderTest, ReadPastKnownEnd)
	{
	const std::vector<uint8_t> data = {'X', 'Y'};
	std::array<uint8_t, blockSize> rdbuf{};
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_EQ(reader.read(0, data.size(), rdbuf.data()),
	static_cast<ssize_t>(data.size()));
	EXPECT_EQ(rdbuf[0], 'X');
	EXPECT_EQ(rdbuf[1], 'Y');
	EXPECT_EQ(reader.read(1, data.size(), rdbuf.data()),
	static_cast<ssize_t>(data.size() - 1));
	EXPECT_EQ(rdbuf[0], 'Y');
	}

	TEST(FRUReaderTest, MultiBlockRead)
	{
	std::vector<uint8_t> data = {};
	data.resize(blockSize, 'X');
	data.resize(2 * blockSize, 'Y');
	std::array<uint8_t, 2 * blockSize> rdbuf{};
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_EQ(reader.read(0, 2 * blockSize, rdbuf.data()),
	static_cast<ssize_t>(2 * blockSize));
	EXPECT_TRUE(std::equal(rdbuf.begin(), rdbuf.end(), data.begin()));
	}

	TEST(FRUReaderTest, ShrinkingEEPROM)
	{
	std::vector<uint8_t> data = {};
	data.resize(3 * blockSize, 'X');
	std::array<uint8_t, blockSize> rdbuf{};
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_EQ(reader.read(data.size() - 1, 2, rdbuf.data()), 1);
	data.resize(blockSize);
	EXPECT_EQ(reader.read(data.size() - 1, 2, rdbuf.data()), 1);
	}

	static constexpr auto testFRUData = std::to_array<uint8_t>({
	0x01, 0x00, 0x01, 0x05, 0x0d, 0x00, 0x00, 0xec, 0x01, 0x04, 0x11, 0xd1,
	0x4f, 0x42, 0x4d, 0x43, 0x5f, 0x54, 0x45, 0x53, 0x54, 0x5f, 0x43, 0x48,
	0x41, 0x53, 0x53, 0x49, 0x53, 0xc6, 0x58, 0x59, 0x5a, 0x31, 0x32, 0x33,
	0xc1, 0x00, 0x00, 0xc4, 0x01, 0x08, 0x19, 0xd8, 0xe7, 0xd1, 0xcf, 0x4f,
	0x70, 0x65, 0x6e, 0x42, 0x4d, 0x43, 0x20, 0x50, 0x72, 0x6f, 0x6a, 0x65,
	0x63, 0x74, 0xcf, 0x4f, 0x42, 0x4d, 0x43, 0x5f, 0x54, 0x45, 0x53, 0x54,
	0x5f, 0x42, 0x4f, 0x41, 0x52, 0x44, 0xc6, 0x41, 0x42, 0x43, 0x30, 0x31,
	0x32, 0xcd, 0x42, 0x4f, 0x41, 0x52, 0x44, 0x5f, 0x50, 0x41, 0x52, 0x54,
	0x4e, 0x55, 0x4d, 0xc0, 0xc1, 0x00, 0x00, 0x73, 0x01, 0x06, 0x19, 0xcf,
	0x4f, 0x70, 0x65, 0x6e, 0x42, 0x4d, 0x43, 0x20, 0x50, 0x72, 0x6f, 0x6a,
	0x65, 0x63, 0x74, 0xd1, 0x4f, 0x42, 0x4d, 0x43, 0x5f, 0x54, 0x45, 0x53,
	0x54, 0x5f, 0x50, 0x52, 0x4f, 0x44, 0x55, 0x43, 0x54, 0xc0, 0xc0, 0xc4,
	0x39, 0x39, 0x39, 0x39, 0xc0, 0xc0, 0xc1, 0x3c,
	});

	TEST(ReadFRUContentsTest, InvalidHeader)
	{
	const std::vector<uint8_t> data = {255, 16};
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_TRUE(readFRUContents(reader, "error").empty());
	}

	TEST(ReadFRUContentsTest, NoData)
	{
	const std::vector<uint8_t> data = {};
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_TRUE(readFRUContents(reader, "error").empty());
	}

	TEST(ReadFRUContentsTest, IPMIValidData)
	{
	const std::vector<uint8_t> data(testFRUData.begin(), testFRUData.end());
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_EQ(readFRUContents(reader, "error"), data);
	}

	TEST(ReadFRUContentsTest, IPMIInvalidData)
	{
	std::vector<uint8_t> data(testFRUData.begin(), testFRUData.end());
	// corrupt a byte to throw off the checksum
	data[7] ^= 0xff;
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_TRUE(readFRUContents(reader, "error").empty());
	}

	TEST(ReadFRUContentsTest, TyanInvalidHeader)
	{
	std::vector<uint8_t> data = {'$', 'T', 'Y', 'A', 'N', '$', 0, 0};
	data.resize(0x6000 + 32);
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_TRUE(readFRUContents(reader, "error").empty());
	}

	TEST(ReadFRUContentsTest, TyanNoData)
	{
	const std::vector<uint8_t> data = {'$', 'T', 'Y', 'A', 'N', '$', 0, 0};
	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	EXPECT_TRUE(readFRUContents(reader, "error").empty());
	}

	TEST(ReadFRUContentsTest, TyanValidData)
	{
	std::vector<uint8_t> data = {'$', 'T', 'Y', 'A', 'N', '$', 0, 0};
	data.resize(0x6000);
	copy(testFRUData.begin(), testFRUData.end(), back_inserter(data));

	auto getData = [&data](auto o, auto l, auto* b) {
	return getDataTempl(data, o, l, b);
	};
	FRUReader reader(getData);

	std::vector<uint8_t> device = readFRUContents(reader, "error");
	EXPECT_TRUE(std::equal(device.begin(), device.end(), testFRUData.begin()));
	}