public void EvaluateIncrementFunctionApply()
{
IFunction incr = new IncrementFunction();
IFunction result = incr.Apply(new ConstantFunction(1));
Assert.IsNotNull(result);
Assert.AreEqual(0, result.Arity);
Assert.IsInstanceOfType(result, typeof(ConstantFunction));
Assert.AreEqual(2, result.Value);
}
public void ComposeFunctions()
{
IFunction incr = new IncrementFunction();
IFunction compose = new ComposeFunction(incr, incr);
Assert.AreEqual(1, compose.Arity);
Assert.AreEqual(compose, compose.Value);
IFunction result = compose.Apply(new ConstantFunction(1));
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(ConstantFunction));
Assert.AreEqual(3, result.Value);
}
