public void Should_return_null_when_source_is_null()
{
// Given
var function = new AddMonthsFunction();
var source = (DateTime?)null;
// When
var result = function.Evaluate(source, "3");
// Then
Assert.That(result, Is.Null);
}
public void Should_return_source_when_months_is_null()
{
// Given
var function = new AddMonthsFunction();
var source = new DateTime(2017, 9, 15, 9, 10, 0);
// When
var result = function.Evaluate(source, null);
// Then
Assert.That(result, Is.EqualTo(source));
}
public void Should_add_months_to_date()
{
// Given
var function = new AddMonthsFunction();
var source = new DateTime(2017, 9, 15, 9, 10, 0);
// When
var result = function.Evaluate(source, "3");
// Then
Assert.That(result, Is.EqualTo(source.AddMonths(3)));
}