def test1(self):
     stimulus = ("5", "1 3 5 9 11")
     response = 7
     self.assertEqual(response, find_missing_int(*stimulus))
 def test3(self):
     stimulus = ("5", "-20 -10 10 20 30")
     response = 0
     self.assertEqual(response, find_missing_int(*stimulus))
 def test4(self):
     stimulus = ("5", "-50 -40 -30 -10 0")
     response = -20
     self.assertEqual(response, find_missing_int(*stimulus))
 def test2(self):
     stimulus = ("5", "1 11 31 41 51")
     response = 21
     self.assertEqual(response, find_missing_int(*stimulus))