public void PassiveChainTest()
{
//Nested Adds
var add3 = new Add().And(new Add().And(new Add()));
Assert.AreEqual(3, add3.Execute(0));
var sub5 = new Sub().And(new Sub().And(new Sub().And(new Sub().And(new Sub()))));
Assert.AreEqual(10, sub5.Execute(15));
//Continous adds to Root
var sub2 = new Add().And(new Sub()).And(new Sub()).And(new Sub());
Assert.AreEqual(3, sub2.Execute(5));
var add5 = new Add();
for (int i = 0; i < 4; i++)
add5.And(new Add());
Assert.AreEqual(5, add5.Execute(0));
}