def test_position_can_be_created_with_x_and_y_params(self):
position = Position(2, 3)
self.assertEqual(2, position.x())
self.assertEqual(3, position.y())
def test_position_with_no_params_corresponds_to_origin (self):
position= Position()
self.assertEqual (0, position.x())
self.assertEqual(0, position.y())
def test_distance_to_same_position_is_cero (self):
position = Position(1,3)
self.assertEqual(0, position.distance_to(position))
def test_position_can_be_created_with_no_params (self):
position = Position ()
self.assertTrue(position != None)
def test_distance_is_greater_than_zero_if_positions_are_diff(self):
first_pos = Position()
second_po = Position(1, 1)
self.assertTrue(first_pos.distance_to(second_po) > 0)