public void AddOneInteger()
{
IFunction addf = new AddIntegerFunction();
IFunction result = addf.Apply(new ConstantFunction(1));
Assert.IsNotNull(result);
Assert.AreEqual(1, result.Arity);
Assert.IsInstanceOfType(result, typeof(PartialFunction));
Assert.AreEqual(result, result.Value);
}
public void AddTwoIntegers()
{
IFunction addf = new AddIntegerFunction();
IFunction result = addf.Apply(new ConstantFunction(1)).Apply(new ConstantFunction(2));
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(ConstantFunction));
Assert.AreEqual(0, result.Arity);
Assert.AreEqual(3, result.Value);
}