public void TestRevertToPosition()
{
decisions.Decide(1, 1, defaultRule);
decisions.Decide(-2, 2, defaultRule);
decisions.Decide(3, 3, defaultRule);
decisions.Decide(-4, 4, defaultRule);
decisions.RevertToPosition(1);
Assert.AreEqual(2, decisions.Count);
Assert.IsTrue(decisions.IsDecided(1));
Assert.IsTrue(decisions.IsDecided(2));
Assert.IsFalse(decisions.IsDecided(3));
Assert.IsFalse(decisions.IsDecided(4));
}