public void should_return_empty_task()
 {
     Timesheet sut = new Timesheet(_file);
     Assert.AreEqual(new Task(), sut.GetLastTask());
 }
 public void should_return_most_recent_task()
 {
     Timesheet timesheet = new Timesheet(_file);
     Assert.AreEqual(_task, timesheet.GetLastTask());
 }
 public void should_return_task_contained_in_file()
 {
     Timesheet timesheet = new Timesheet(_file);
     Assert.AreEqual(_task, timesheet.GetLastTask());
 }