public void GetBytesCountTest(int byteCount)
{
IPrng prng = new PrngSHA256();
byte[] bytes = prng.GetRandomBytes(byteCount);
Assert.True(bytes.Length == byteCount);
}
public void GetSingleRandomByteTest()
{
IPrng prng = new PrngSHA256();
byte b = prng.GetRandomByte();
Assert.True(Convert.ToInt32(b) > -1 && Convert.ToInt32(b) < 256);
}
public void NegativeByteCountTest()
{
const int byteCounnt = -1;
IPrng prng = new PrngSHA256();
byte[] bytes;
Exception ex = Assert.Throws <ArgumentException>(() => bytes = prng.GetRandomBytes(byteCounnt));
Assert.Contains("A non-negative integer is required.", ex.Message);
}
public void GetBytesEntropyTest(int byteCount)
{
IPrng prng = new PrngSHA256();
bool isFilled = false;
byte[] bytes = prng.GetRandomBytes(byteCount);
foreach (var b in bytes)
{
if (Convert.ToInt32(b) > 0)
{
//Testing that we are getting at least some non-zero values. Not testing the quality of the PRNG.
isFilled = true;
}
}
Assert.True(isFilled);
}
