public void Fit_OnlyOnce()
{
broomList = new List<BookableRoom>() { broom1 };
broomList2 = new List<BookableRoom>() { (BookableRoom) broom1.Clone() };
day1 = new Day(broomList);
day2 = new Day(broomList2);
table1 = new Timetable(new List<Day>() { day1, day2 });
Assert.IsTrue(table1.Fit(course1));
var fits = table1.Days.Where(day => day.IsCourseBooked(course1)).ToList();
Assert.AreEqual(1, fits.Count);
}