public void TestHash256()
{
const int minBitDelta = 64; // on average, the bit delta will be 128
var result0 = new byte[256 / 8];
var result1 = HashUtilities.ComputeHash256(new byte[0]);
Console.WriteLine("Hashed to: {0}", StringUtilities.ToHexString(result1));
Assert.GreaterOrEqual(GetBitDelta(result0, result1), minBitDelta);
var result1B = HashUtilities.ComputeHash256(new byte[0]);
Console.WriteLine("Hashed to: {0}", StringUtilities.ToHexString(result1B));
Assert.AreEqual(GetBitDelta(result1, result1B), 0);
var result2 = HashUtilities.ComputeHash256(Encoding.ASCII.GetBytes("ClearCanvas.Common.Utilities.Tests"));
Console.WriteLine("Hashed to: {0}", StringUtilities.ToHexString(result2));
Assert.GreaterOrEqual(GetBitDelta(result0, result2), minBitDelta);
Assert.GreaterOrEqual(GetBitDelta(result1, result2), minBitDelta);
var result3 = HashUtilities.ComputeHash256(Encoding.ASCII.GetBytes("ClearCanvas.Commom.Utilities.Tests"));
Console.WriteLine("Hashed to: {0}", StringUtilities.ToHexString(result3));
Assert.GreaterOrEqual(GetBitDelta(result0, result3), minBitDelta);
Assert.GreaterOrEqual(GetBitDelta(result1, result3), minBitDelta);
Assert.GreaterOrEqual(GetBitDelta(result2, result3), minBitDelta);
var result4 = HashUtilities.ComputeHash256(Encoding.ASCII.GetBytes("ClearCanvas.Common.Utilities.Tests"), 18, 10);
Console.WriteLine("Hashed to: {0}", StringUtilities.ToHexString(result4));
Assert.GreaterOrEqual(GetBitDelta(result0, result4), minBitDelta);
Assert.GreaterOrEqual(GetBitDelta(result1, result4), minBitDelta);
Assert.GreaterOrEqual(GetBitDelta(result2, result4), minBitDelta);
Assert.GreaterOrEqual(GetBitDelta(result3, result4), minBitDelta);
var result5 = HashUtilities.ComputeHash256(Encoding.ASCII.GetBytes("ClearCanvas.Commom.Utilities.Tests"), 18, 10);
Console.WriteLine("Hashed to: {0}", StringUtilities.ToHexString(result5));
Assert.GreaterOrEqual(GetBitDelta(result0, result5), minBitDelta);
Assert.GreaterOrEqual(GetBitDelta(result1, result5), minBitDelta);
Assert.GreaterOrEqual(GetBitDelta(result2, result5), minBitDelta);
Assert.GreaterOrEqual(GetBitDelta(result3, result5), minBitDelta);
Assert.AreEqual(0, GetBitDelta(result4, result5), minBitDelta);
}
