public void TestImmutability()
{
var wheelElement = new WheelElement(2);
long oldValue = wheelElement.Number;
wheelElement.Next();
Assert.AreEqual(oldValue, wheelElement.Number);
}
public void TestFirst4Primes()
{
const int Count = 10000;
var expected = Enumerable.Range(2, Count).Where(ShouldBeInWheelForFirst4Primes);
var actual = new List<long>();
var wheelElement = new WheelElement(4);
while (wheelElement.Number <= Count + 1)
{
actual.Add(wheelElement.Number);
wheelElement = wheelElement.Next();
}
CollectionAssert.AreEqual(expected.ToList(), actual);
}