77 lines
2.0 KiB
C#
77 lines
2.0 KiB
C#
// Copyright (c) Umbraco.
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// See LICENSE for more details.
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using System.Text;
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using NUnit.Framework;
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using Umbraco.Cms.Core;
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namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Core;
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public class HexEncoderTests
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{
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private static readonly char[] s_bytesToHexStringLookup =
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{
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
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};
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[Test]
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public void ToHexStringCreatesCorrectValue()
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{
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var buffer = new byte[255];
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var random = new Random();
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random.NextBytes(buffer);
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var sb = new StringBuilder(buffer.Length * 2);
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for (var i = 0; i < buffer.Length; i++)
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{
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sb.Append(buffer[i].ToString("X2"));
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}
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var expected = sb.ToString();
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var actual = HexEncoder.Encode(buffer);
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Assert.AreEqual(expected, actual);
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}
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[Test]
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public void ToHexStringWithSeparatorCreatesCorrectValue()
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{
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var buffer = new byte[255];
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var random = new Random();
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random.NextBytes(buffer);
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var expected = ToHexString(buffer, '/', 2, 4);
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var actual = HexEncoder.Encode(buffer, '/', 2, 4);
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Assert.AreEqual(expected, actual);
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}
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// Reference implementation taken from original extension method.
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private static string ToHexString(byte[] bytes, char separator, int blockSize, int blockCount)
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{
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int p = 0, bytesLength = bytes.Length, count = 0, size = 0;
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var chars = new char[(bytesLength * 2) + blockCount];
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for (var i = 0; i < bytesLength; i++)
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{
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var b = bytes[i];
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chars[p++] = s_bytesToHexStringLookup[b / 0x10];
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chars[p++] = s_bytesToHexStringLookup[b % 0x10];
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if (count == blockCount)
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{
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continue;
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}
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if (++size < blockSize)
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{
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continue;
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}
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chars[p++] = separator;
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size = 0;
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count++;
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}
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return new string(chars, 0, chars.Length);
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}
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}
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