public void ToString_WhenCalledAndIsNull_CorrectStringIsSet()
{
//Arrange
double?newValue = null;
var constantObject = new ConstantObject(newValue);
//Act
var result = constantObject.ToString();
//Assert
Assert.AreEqual(result, "constant");
}
public void ToString_WhenCalledAndHasValue_CorrectStringIsSet()
{
//Arrange
const double newValue = 12;
var constantObject = new ConstantObject(newValue);
//Act
var result = constantObject.ToString();
//Assert
Assert.AreEqual(result, newValue.ToString(CultureInfo.InvariantCulture));
}