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 * i * i + Math.PI * i) % 256);
}
var expectedTimeLow = length / (MegabytesPerSecondHighSpeed * 1000);
var expectedTimeHigh = 1 + length / (MegabytesPerSecondLowSpeed * 1000);
var hasher = new Sha256ContentHasher();
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);
}
}
public static async Task TestHashes(string expectedHash, string inputMessage)
{
var expectedHashFormatted = expectedHash.Replace(" ", string.Empty).ToLowerInvariant();
var hasher = new Sha256ContentHasher();
var messageBytes = Encoding.ASCII.GetBytes(inputMessage);
using (var stream = new MemoryStream(messageBytes))
{
var actualHash = await hasher.ComputeHash(stream);
Assert.Equal(expectedHashFormatted, actualHash);
}
}