TestHex.cpp - mozsearch

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include <cstdint>

#include <cstring>

#include "gtest/gtest.h"

#include "mozilla/Hex.h"

#include "mozilla/Span.h"

#include "mozilla/gtest/MozAssertions.h"

#include "nsString.h"

#include "nsTArray.h"

using mozilla::HexDecode;

using mozilla::HexEncode;

using mozilla::Span;

TEST(HexEncode, EncodeLowercase)

  const uint8_t bytes[] = {0xab, 0x0c, 0x00, 0xff};

  nsAutoCString out;

  HexEncode(Span(bytes), out);

  EXPECT_TRUE(out.EqualsASCII("ab0c00ff"));

TEST(HexEncode, EncodeUppercase)

  const uint8_t bytes[] = {0xab, 0x0c, 0xff};

  nsAutoCString out;

  HexEncode(Span(bytes), out, /* aUpperCase = */ true);

  EXPECT_TRUE(out.EqualsASCII("AB0CFF"));

TEST(HexEncode, EncodeEmpty)

  nsAutoCString out;

  HexEncode(Span<const uint8_t>(), out);

  EXPECT_TRUE(out.IsEmpty());

TEST(HexEncode, RoundTripAllByteValues)

  uint8_t bytes[256];

  for (size_t i = 0; i < 256; ++i) {

    bytes[i] = static_cast<uint8_t>(i);

  nsAutoCString hex;

  HexEncode(Span(bytes), hex);

  EXPECT_EQ(hex.Length(), 512u);

  nsTArray<uint8_t> decoded;

  EXPECT_NS_SUCCEEDED(HexDecode(hex, decoded));

  ASSERT_EQ(decoded.Length(), 256u);

  EXPECT_EQ(0, memcmp(bytes, decoded.Elements(), sizeof(bytes)));

TEST(HexEncode, DecodeAcceptsMixedCase)

  nsTArray<uint8_t> out;

  EXPECT_NS_SUCCEEDED(HexDecode("Ab0C"_ns, out));

  ASSERT_EQ(out.Length(), 2u);

  EXPECT_EQ(out[0], 0xab);

  EXPECT_EQ(out[1], 0x0c);

TEST(HexEncode, DecodeEmpty)

  nsTArray<uint8_t> out;

  EXPECT_NS_SUCCEEDED(HexDecode(""_ns, out));

  EXPECT_TRUE(out.IsEmpty());

TEST(HexEncode, DecodeRejectsOddLength)

  nsTArray<uint8_t> out;

  EXPECT_EQ(HexDecode("abc"_ns, out), NS_ERROR_INVALID_ARG);

  EXPECT_TRUE(out.IsEmpty());

TEST(HexEncode, DecodeRejectsNonHexCharacter)

  nsTArray<uint8_t> out;

  EXPECT_EQ(HexDecode("0g"_ns, out), NS_ERROR_INVALID_ARG);

  EXPECT_TRUE(out.IsEmpty());