def test_set_unit(self):
        speed = Speed(mi__hr=10)
        speed.unit = 'm__s'

        expected_value = 4.4704
        actual_value = speed.value

        self.assertAlmostEqual(
            expected_value,
            actual_value,
        )
    def test_set_unit(self):
        speed = Speed(mi__hr=10)
        speed.unit = 'm__s'

        expected_value = 4.4704
        actual_value = speed.value

        self.assertAlmostEqual(
            expected_value,
            actual_value,
        )
    def test_set_unit(self):
        speed = Speed(mi__hr=10)
        speed.unit = 'm__s'

        expected_value =  Decimal('4.4704')
        actual_value = speed.value

        self.assertEqual(
            expected_value,
            actual_value,
        )