public void TestCopy()
{
long[] x = new long[] { 2, 1, 3, 2 };
long[] y = AbstractHashGenerator.Copy(x);
Assert.IsTrue(Common.Base.Compares.AreDeepEqual(x, y));
Assert.AreNotSame(x, y);
}
public void TestLowestThreeBits()
{
Assert.AreEqual(0, AbstractHashGenerator.LowestThreeBits(0L));
Assert.AreEqual(1, AbstractHashGenerator.LowestThreeBits(1L));
Assert.AreEqual(2, AbstractHashGenerator.LowestThreeBits(2L));
Assert.AreEqual(3, AbstractHashGenerator.LowestThreeBits(3L));
Assert.AreEqual(4, AbstractHashGenerator.LowestThreeBits(4L));
Assert.AreEqual(5, AbstractHashGenerator.LowestThreeBits(5L));
Assert.AreEqual(6, AbstractHashGenerator.LowestThreeBits(6L));
Assert.AreEqual(7, AbstractHashGenerator.LowestThreeBits(7L));
// check we don't exceed 7
Assert.AreEqual(0, AbstractHashGenerator.LowestThreeBits(8L));
Assert.AreEqual(1, AbstractHashGenerator.LowestThreeBits(9L));
Assert.AreEqual(2, AbstractHashGenerator.LowestThreeBits(10L));
Assert.AreEqual(3, AbstractHashGenerator.LowestThreeBits(11L));
Assert.AreEqual(4, AbstractHashGenerator.LowestThreeBits(12L));
Assert.AreEqual(5, AbstractHashGenerator.LowestThreeBits(13L));
Assert.AreEqual(6, AbstractHashGenerator.LowestThreeBits(14L));
Assert.AreEqual(7, AbstractHashGenerator.LowestThreeBits(15L));
Assert.AreEqual(0, AbstractHashGenerator.LowestThreeBits(16L));
// max/min numbers
Assert.AreEqual(7, AbstractHashGenerator.LowestThreeBits(long.MaxValue));
Assert.AreEqual(0, AbstractHashGenerator.LowestThreeBits(long.MinValue));
}
public void TestRotate_N()
{
var m_pseudorandom = new Mock <Pseudorandom>();
AbstractHashGenerator f = new AbstractHashGenerator(m_pseudorandom.Object);
f.Rotate(0, 5); // note 0 doesn't rotate..
m_pseudorandom.Verify(n => n.Next(0), Times.Exactly(5));
}
public void TestRotate()
{
var m_pseudorandom = new Mock <Pseudorandom>();
AbstractHashGenerator f = new AbstractHashGenerator(m_pseudorandom.Object);
f.Rotate(5L);
m_pseudorandom.Verify(n => n.Next(5L), Times.Exactly(1));
}
public void TestCopy_SrcDest()
{
long[] x = new long[] { 42, 23, 1, 72 };
long[] y = new long[4];
AbstractHashGenerator.Copy(x, y);
Assert.IsTrue(Common.Base.Compares.AreDeepEqual(x, y));
Assert.AreNotSame(x, y);
}
public void TestDistribute()
{
var m_pseudorandom = new Mock <Pseudorandom>();
AbstractHashGenerator f = new AbstractHashGenerator(m_pseudorandom.Object);
long x = f.Distribute(5L); // lowest 3 bits = 5, rotate 6 times
m_pseudorandom.Verify(n => n.Next(It.IsAny <long>()), Times.Exactly(6));
Assert.AreNotEqual(5L, x);
}
public void TestDistribute_AtLeastOnce()
{
var m_pseudorandom = new Mock <Pseudorandom>();
AbstractHashGenerator f = new AbstractHashGenerator(m_pseudorandom.Object);
long x = f.Distribute(8L); // lowest 3 bits = 0, make sure we rotate 1
m_pseudorandom.Verify(n => n.Next(It.IsAny <long>()), Times.Exactly(1));
Assert.AreNotEqual(8L, x);
}