public void calculate_should_return_real_number_with_multi_value()
{
// Given
SUT = new Multiplication(new RealNumber(2.0), new RealNumber(6.0));
// When
var result = SUT.Calculate();
// Then
Assert.IsInstanceOf<RealNumber>(result);
}
public void calculate_should_return_number_that_is_the_multi()
{
// Given
SUT = new Multiplication(new RealNumber(2.0), new RealNumber(6.0));
// When
var result = SUT.Calculate() as RealNumber;
// Then
Assert.AreEqual(12.0, result.Value);
}