def test_compute_min_refills_too_far_to_end(self):
# arrange
total_distance = 10
stops = [1, 3, 5, 7]
car_distance = 2
# act
result = compute_min_refills(total_distance, car_distance, stops)
# assert
self.assertEqual(result, -1)
def test_compute_min_refills_not_possible(self):
# arrange
total_distance = 10
stops = [1, 2, 4, 9]
car_distance = 3
# act
result = compute_min_refills(total_distance, car_distance, stops)
# assert
self.assertEqual(result, -1)
def test_compute_min_refills_equally_spaced(self):
# arrange
total_distance = 10
stops = [3, 6, 9]
car_distance = 3
# act
result = compute_min_refills(total_distance, car_distance, stops)
# assert
self.assertEqual(result, 3)
def test_compute_min_refills_not_required_stops(self):
# arrange
total_distance = 15
stops = [1, 5, 7, 10, 12]
car_distance = 5
# act
result = compute_min_refills(total_distance, car_distance, stops)
# assert
self.assertEqual(result, 2)
def test_compute_min_refills_no_refills(self):
# arrange
total_distance = 5
stops = [1, 2, 3]
car_distance = 6
# act
result = compute_min_refills(total_distance, car_distance, stops)
# assert
self.assertEqual(result, 0)