public void SequenceHashCode()
{
var ascending = new[] { 1, 2, 3, 4, 5, 6 };
var neither = new[] { 1, 6, 5, 2, 3, 4 };
Assert.AreNotEqual(ascending.SequenceHashCode(), neither.SequenceHashCode()); // not guaranteed, but should be very unlikely
Assert.AreEqual(ascending.SequenceHashCode(), neither.OrderBy(x => x).SequenceHashCode());
var equality = ObjectUtility.CreateEqualityComparer <int>((x, y) => x % 2 == y % 2, x => x % 2);
Assert.AreEqual(ascending.SequenceHashCode(equality), neither.SequenceHashCode(equality));
}
