public void As_SIUnitSystem_ThrowsArgumentExceptionIfNotSupported() { var quantity = new WarpingMomentOfInertia(value: 1, unit: WarpingMomentOfInertia.BaseUnit); Func<object> AsWithSIUnitSystem = () => quantity.As(UnitSystem.SI); if (SupportsSIUnitSystem) { var value = (double) AsWithSIUnitSystem(); Assert.Equal(1, value); } else { Assert.Throws<ArgumentException>(AsWithSIUnitSystem); } }