public void IsOpen_ThrowsException()
{
var date = DateTime.Parse("2018-12-25");
Action testDate = () => testPeriod1.IsOpen(date);
Assert.Throws <ArgumentOutOfRangeException>(testDate);
date = DateTime.Parse("2019-01-01 00:00:00");
testDate = () => testPeriod1.IsOpen(date);
Assert.Throws <ArgumentOutOfRangeException>(testDate);
date = DateTime.Parse("2017-12-31 23:59:59");
testDate = () => testPeriod1.IsOpen(date);
Assert.Throws <ArgumentOutOfRangeException>(testDate);
}
