public void TestFactorial()
{
//Arrange
VariableNode variableNode = new VariableNode();
FactorialFunction factorialNode = new FactorialFunction(variableNode);
//Act
double result1 = factorialNode.Calculate(0);
double result2 = factorialNode.Calculate(1);
double result3 = factorialNode.Calculate(2);
double result4 = factorialNode.Calculate(4);
//Assert
Assert.AreEqual(1, result1);
Assert.AreEqual(1, result2);
Assert.AreEqual(2, result3);
Assert.AreEqual(24, result4);
}
public void SuccessfullyReturnValueGivenAPositiveDouble()
{
var function = new FactorialFunction();
var inputs = function.GetInputs();
inputs[0].Value = 5.5;
var result = function.Calculate(inputs);
Assert.NotNull(result);
Assert.Collection(result,
i =>
{
Assert.Equal(typeof(double), i.Value.GetType());
Assert.Equal(287.88527781504507, TypeConverter.ToObject <double>(i.Value));
});
}
public void SuccessfullyReturnValueGivenAPositiveInteger()
{
var function = new FactorialFunction();
var inputs = function.GetInputs();
Assert.Single(inputs);
inputs[0].Value = 5;
var result = function.Calculate(inputs);
Assert.NotNull(result);
Assert.Collection(result,
i =>
{
Assert.Equal(typeof(double), i.Value.GetType());
Assert.Equal(120, TypeConverter.ToObject <int>(i.Value));
});
}