public void WhenToOADateCalled_ExpectExpectedValueReturned()
{
// Arrange
var date = new DateTime(2015, 10, 15, 12, 12, 12);
var expected = date.ToOADate();
// Act
var target = new DateTimeWrap(date);
var actual = target.ToOADate();
// Assert
actual.Should().Equal(expected);
}