public void ShlTest()
{
const int RepeatCount = 5;
UlongRandomGenerator random = new UlongRandomGenerator();
ulong[] y = new ulong[3];
ulong[] copy = new ulong[3];
int size = y.Length * 64;
for (int count = 0; count <= size; count++)
{
for (int pos = 0; pos < size - count; pos++)
{
for (int shift = 0; shift <= count; shift++)
{
for (int i = 0; i < RepeatCount; i++)
{
random.Generate(y.Length, y);
Vectors.Copy(y.Length, y, 0, copy, 0);
BitUtils.Shl(count, shift, y, pos);
// right part that was not copied
if (pos > 0)
{
Assert.IsTrue(BitUtils.Equals(pos, y, 0, copy, 0));
}
// shifted part
if (shift < count)
{
Assert.IsTrue(BitUtils.Equals(count - shift, y, pos + shift, copy, pos));
}
// zeroed part
if (shift > 0)
{
Assert.AreEqual(0, BitUtils.CountOneBits(shift, y, pos));
}
// left part that was not copied
if (pos + count < size)
{
Assert.IsTrue(BitUtils.Equals(size - (pos + count), y, pos + count, copy, pos + count));
}
}
}
}
}
}