test/redfish-core/include/utils/hex_utils_test.cpp

#include "hex_utils.hpp"

#include <algorithm>
#include <cctype>
#include <cstdint>
#include <limits>
#include <string>
#include <vector>

#include <gmock/gmock.h>  // IWYU pragma: keep
#include <gtest/gtest.h>  // IWYU pragma: keep

// IWYU pragma: no_include "gtest/gtest_pred_impl.h"
// IWYU pragma: no_include <gtest/gtest-message.h>
// IWYU pragma: no_include <gtest/gtest-test-part.h>
// IWYU pragma: no_include "gtest/gtest_pred_impl.h"

namespace {

using ::testing::IsEmpty;

TEST(IntToHexString, ReturnsCorrectHexForUint64) {
  EXPECT_EQ(intToHexString(0xFFFFFFFFFFFFFFFFULL, 16), "FFFFFFFFFFFFFFFF");

  EXPECT_EQ(intToHexString(0, 4), "0000");
  EXPECT_EQ(intToHexString(0, 8), "00000000");
  EXPECT_EQ(intToHexString(0, 12), "000000000000");
  EXPECT_EQ(intToHexString(0, 16), "0000000000000000");

  // uint64_t sized ints
  EXPECT_EQ(intToHexString(0xDEADBEEFBAD4F00DULL, 4), "F00D");
  EXPECT_EQ(intToHexString(0xDEADBEEFBAD4F00DULL, 8), "BAD4F00D");
  EXPECT_EQ(intToHexString(0xDEADBEEFBAD4F00DULL, 12), "BEEFBAD4F00D");
  EXPECT_EQ(intToHexString(0xDEADBEEFBAD4F00DULL, 16), "DEADBEEFBAD4F00D");

  // uint16_t sized ints
  EXPECT_EQ(intToHexString(0xBEEF, 1), "F");
  EXPECT_EQ(intToHexString(0xBEEF, 2), "EF");
  EXPECT_EQ(intToHexString(0xBEEF, 3), "EEF");
  EXPECT_EQ(intToHexString(0xBEEF, 4), "BEEF");
}

TEST(BytesToHexString, OnSuccess) {
  EXPECT_EQ(bytesToHexString({0x1a, 0x2b}), "1A2B");
}

TEST(BytesToHexDump, ZeroLength) { EXPECT_EQ(bytesToHexDump({}), ""); }

TEST(BytesToHexDump, MultipleLines) {
  std::vector<uint8_t> bytes;
  for (int i = 0; i < 20; ++i) {
    bytes.push_back(static_cast<uint8_t>('A' + i));
  }
  std::string expected =
      "0000:  41 42 43 44 45 46 47 48  49 4A 4B 4C 4D 4E 4F 50  | "
      "ABCDEFGHIJKLMNOP |\n"
      "0010:  51 52 53 54                                       | QRST |\n";
  EXPECT_EQ(bytesToHexDump(bytes), expected);
}

TEST(BytesToHexDump, LargeLength) {
  std::vector<uint8_t> bytes(512, 'A');
  std::string result = bytesToHexDump(bytes);
  EXPECT_EQ(result.length(), 32 * 78);  // 32 lines, 78 chars each
  EXPECT_EQ(std::count(result.begin(), result.end(), '\n'), 32);
}

TEST(BytesToHexDump, ActualHexValues) {
  std::vector<uint8_t> bytes = {0x00, 0x01, 0x02, 0xAB, 0xFF, 'A', 'B', 'C'};
  std::string expected =
      "0000:  00 01 02 AB FF 41 42 43                           | .....ABC "
      "|\n";
  EXPECT_EQ(bytesToHexDump(bytes), expected);
}

TEST(HexCharToNibble, ReturnsCorrectNibbleForEveryHexChar) {
  for (char c = 0; c < std::numeric_limits<char>::max(); ++c) {
    uint8_t expected = 16;
    if (isdigit(c) != 0) {
      expected = static_cast<uint8_t>(c - '0');
    } else if (c >= 'A' && c <= 'F') {
      expected = static_cast<uint8_t>(c - 'A' + 10);
    } else if (c >= 'a' && c <= 'f') {
      expected = static_cast<uint8_t>(c - 'a' + 10);
    }

    EXPECT_EQ(hexCharToNibble(c), expected);
  }
}

TEST(HexStringToBytes, Success) {
  std::vector<uint8_t> hexBytes = {0x01, 0x23, 0x45, 0x67,
                                   0x89, 0xAB, 0xCD, 0xEF};
  EXPECT_EQ(hexStringToBytes("0123456789ABCDEF"), hexBytes);
  EXPECT_THAT(hexStringToBytes(""), IsEmpty());
}

TEST(HexStringToBytes, Failure) {
  EXPECT_THAT(hexStringToBytes("Hello"), IsEmpty());
  EXPECT_THAT(hexStringToBytes("`"), IsEmpty());
  EXPECT_THAT(hexStringToBytes("012"), IsEmpty());
}

}  // namespace