public void Distance_ToUnit_When_ConvertingFromMilliMeterToMile_Then_ResultShouldBeAsExpected(
            double length,
            double expected)
        {
            var testee = new Distance(length, x => x.Milli.Meters);

            IQuantity result = testee.ToUnit(x => x.Miles);

            result.Value.Should().BeApproximately(expected, TestHelper.DefaultAssertPrecision);
        }