public void WhenAddCalled_ExpectSameValueReturned()
{
// Arrange
var now = DateTime.Now;
var addedTimeSpan = TimeSpan.FromDays(15);
var expected = now.Add(addedTimeSpan);
// Act
var target = new DateTimeWrap(now);
var actual = target.Add(addedTimeSpan);
// Assert
actual.DateTimeInstance.Should().Equal(expected);
}
