def test_get_current_task_returns_last_time_units_element():
processor = Processor()
processor.add_time_unit()
t = Task('T1', 1, 1)
processor.set_task(t)
assert processor.get_current_task() == t
def test_get_current_task_returns_none_when_time_units_is_empty():
processor = Processor()
assert processor.get_current_task() is None