def test_returns_final_expected_answer(self):
target = PartOne()
numbers = target.load_data("test_data.txt")
pair = target.find_pair(numbers)
answer = target.calculate_answer(pair)
self.assertEqual(answer, 514579)
def test_can_find_number_pair(self):
target = PartOne()
numbers = target.load_data("test_data.txt")
answer = target.find_pair(numbers)
self.assertEqual(answer[0] + answer[1], 2020)