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EternalArrowBackup/Tests/Hasher/SHA1/HasherTests.cs

68 lines
2.6 KiB

namespace EternalArrowBackup.Hasher.SHA1
{
using System;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using Xunit;
public static class HasherTests
{
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private const int MegabytesPerSecondLowSpeed = 200;
private const int MegabytesPerSecondHighSpeed = 1000;
// Test vectors taken from http://csrc.nist.gov/groups/ST/toolkit/documents/Examples/SHA_All.pdf
[Theory]
[Trait("Category", "Simple")]
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[InlineData("DA39A3EE 5E6B4B0D 3255BFEF 95601890 AFD80709", "")]
[InlineData("A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D", "abc")]
[InlineData("84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq")]
public static async Task TestHashes(string expectedHash, string inputMessage)
{
var expectedHashFormatted = expectedHash.Replace(" ", string.Empty).ToLowerInvariant();
var hasher = new Sha1ContentHasher();
var messageBytes = Encoding.ASCII.GetBytes(inputMessage);
using (var stream = new MemoryStream(messageBytes))
{
var actualHash = await hasher.ComputeHash(stream);
Assert.Equal(expectedHashFormatted, actualHash);
}
}
// Single-threaded SHA1 performance on i5-6500 is around 500MB/s
[Theory]
[Trait("Category", "Integration")]
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[InlineData(0)]
[InlineData(1)]
[InlineData(1000)]
[InlineData(1000000)]
[InlineData(10000000)]
[InlineData(100000000)]
[InlineData(1000000000)]
public static async Task TestPerformance(int length)
{
var messageBytes = new byte[length];
for (var i = 0; i < length; i++)
{
messageBytes[i] = (byte)((int)(Math.E * length + Math.PI * i) % 256);
}
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var expectedTimeLow = length / (MegabytesPerSecondHighSpeed * 1000);
var expectedTimeHigh = 1 + length / (MegabytesPerSecondLowSpeed * 1000);
var hasher = new Sha1ContentHasher();
using (var stream = new MemoryStream(messageBytes))
{
await hasher.ComputeHash(stream);
stream.Seek(0, SeekOrigin.Begin);
var stopwatch = new Stopwatch();
stopwatch.Start();
await hasher.ComputeHash(stream);
stopwatch.Stop();
Assert.InRange(stopwatch.ElapsedMilliseconds, expectedTimeLow, expectedTimeHigh);
}
}
}
}