Use UnitAbbreviationsCache.Default to extend a abbreviation

[Matze693]

UseCase

I'm using a multimeter which returns ElectricResistance as string, with the pattern x.xx Ohm. To parse this with UnitsNet I'm using UnitAbbreviationsCache.Default.MapUnitToAbbreviation(ElectricResistanceUnit.Ohm, formatProvider, "Ω", "Ohm").

Issue

When using UnitAbbreviationsCache.Default.MapUnitToAbbreviation all other abbreviations are overridden. Means, in my case, I'm not able to parse "4.00 MΩ" any more.

[Fact]
public void ExtendUnitAbbreviationsCacheTest()
{
    const string valueToParse = "4.00 MΩ";
    var expectedQuantity = ElectricResistance.FromMegaohms(4);
    var formatProvider = CultureInfo.InvariantCulture;

    Assert.Equal(ElectricResistance.Parse(valueToParse, formatProvider), expectedQuantity);

    UnitAbbreviationsCache.Default.MapUnitToAbbreviation(ElectricResistanceUnit.Ohm, formatProvider, "Ω", "Ohm");

    // -> The input string '4.00 M' was not in a correct format.
    Assert.Equal(ElectricResistance.Parse(valueToParse, formatProvider), expectedQuantity);
}

Question

Is there any other solution, to extend a unit map with a custom abbreviation, instead of using my own UnitAbbreviationsCache?

[angularsen]

Late reply, sorry.

What version is this?
Your code works for me on 5.58 and 6.0.0-pre012.

[angularsen]

It seems from the comment The input string '4.00 M' was not in a correct format. that you maybe accidentally forgot to pass the Ohm character in your testing? 4.00 M vs 4.00 MΩ.

[Matze693]

Thanks for your reply.

We still use 5.12.0, with 5.59.0 works as expected...
Sorry, my fault to check the version first.

[angularsen]

I see, no problem. Glad it worked out!