def test_task_clone(self):
t1 = Task(a=1, b=2)
t2 = t1.clone(b=3, c=4)
self.assertEqual(t1.a, 1)
self.assertEqual(t1.b, 2)
self.assertEqual(t2.a, 1)
self.assertEqual(t2.b, 3)
self.assertEqual(t2.c, 4)
def test_requirement_setter(self):
t1 = Task(a=1, b=2)
t2 = t1.clone(b=3, c=4)
t2.set_requirements([t1])
self.assertEqual(t2.get_requirements(), [t1])
