def test_last_task_ended_returns_true_when_last_assigned_task_ended():
processor = Processor()
processor.add_time_unit()
t = Task('T1', 2, 2)
processor.set_task(t)
processor.add_time_unit()
assert processor.last_task_ended()
def test_last_task_ended_returns_true_when_current_task_is_none():
processor = Processor()
processor.add_time_unit()
assert processor.last_task_ended()