nullable int always set to 0?

[StefH]

  [ValueArgument(typeof(int), "MaxRequestLogCount", Optional = true, DefaultValue = null)]
  public int? MaxRequestLogCount { get; set; }

When not providing this argument, the default value is set to 0 instead of null ? Do I miss something?

And typeof(int?) crashes ?

  [ValueArgument(typeof(int?), "MaxRequestLogCount", Optional = true, DefaultValue = null)]
  public int? MaxRequestLogCount { get; set; }

[j-maly]

[ValueArgument(typeof(int))] - I am surprised that this does not crash. property.SetValue(null) where property is of type int.... weird

But this

[ValueArgument(typeof(int?), "MaxRequestLogCount", Optional = true, DefaultValue = null)]
public int? MaxRequestLogCount { get; set; }

seem to work fine for me. And isn't DefaultValue=null redundant?

[StefH]

Maybe it's just Net Core 2.0 related???

See https://github.com/WireMock-Net/WireMock.Net/tree/master/examples/WireMock.Net.StandAlone.NETCoreApp

And the command is: dotnet run -f netcoreapp2.0 --MaxRequestLogCount 100

The error is like:

Type System.Nullable`1[System.Int32] of argument 100 is not a built-in type.Set ConvertValueHandler to a conversion routine for this type or define static method Parse(string stringValue, Cu
ltureInfo cultureInfo) that can Parse your type from string.

Usage:
        --Port[optional]... Port to listen on.

        --Urls[optional]... URL(s) to listen on.

        --AllowPartialMapping[optional]... Allow Partial Mapping (default set to false).

        --StartAdminInterface[optional]... Start the AdminInterface (default set to true).

        --ReadStaticMappings[optional]... Read StaticMappings from ./__admin/mappings (default set to true).

        --ProxyURL[optional]... The ProxyURL to use.

        --SaveProxyMapping[optional]... Save the proxied request and response mapping files in ./__admin/mappings.  (default set to true).

        --X509Certificate2ThumbprintOrSubjectName[optional]... The X509Certificate2 Thumbprint or SubjectName to use.

        --AdminUsername[optional]... The username needed for __admin access.

        --AdminPassword[optional]... The password needed for __admin access.

        --RequestLogExpirationDuration[optional]... The RequestLog expiration in hours (optional).

        --MaxRequestLogCount[optional]... The MaxRequestLog count (optional).

Unhandled Exception: CommandLineParser.Exceptions.InvalidConversionException: Type System.Nullable`1[System.Int32] of argument 100 is not a built-in type.Set ConvertValueHandler to a convers
ion routine for this type or define static method Parse(string stringValue, CultureInfo cultureInfo) that can Parse your type from string.
   at CommandLineParser.Arguments.ValueArgument`1.DefaultConvert(String stringValue)
   at CommandLineParser.Arguments.ValueArgument`1.Convert(String stringValue)
   at CommandLineParser.Arguments.ValueArgument`1.Parse(IList`1 args, Int32& i)
   at CommandLineParser.CommandLineParser.ParseCommandLine(String[] args)
   at WireMock.Net.StandAlone.StandAloneApp.Start(String[] args) in C:\Users\StefHeyenrath\Documents\GitHub\WireMock.Net\src\WireMock.Net.StandAlone\StandAloneApp.cs:line 146
   at WireMock.Net.StandAlone.NETCoreApp.Program.Main(String[] args) in C:\Users\StefHeyenrath\Documents\GitHub\WireMock.Net\examples\WireMock.Net.StandAlone.NETCoreApp\Program.cs:line 14

[j-maly]

Yeah, could be .Net version. Could you take a look whether there is some change in the implementation of int32? .tryparse/parse in NC2.0?

On Aug 20, 2017 7:26 PM, "Stef Heyenrath" notifications@github.com wrote:

Maybe it's just Net Core 2.0 related???

See https://github.com/WireMock-Net/WireMock.Net/tree/master/ examples/WireMock.Net.StandAlone.NETCoreApp

And the command is: dotnet run -f netcoreapp2.0 --MaxRequestLogCount 100

The error is like:

Type System.Nullable`1[System.Int32] of argument 100 is not a built-in type.Set ConvertValueHandler to a conversion routine for this type or define static method Parse(string stringValue, Cu ltureInfo cultureInfo) that can Parse your type from string.

Usage: --Port[optional]... Port to listen on.

    --Urls[optional]... URL(s) to listen on.

    --AllowPartialMapping[optional]... Allow Partial Mapping

(default set to false).

    --StartAdminInterface[optional]... Start the AdminInterface

(default set to true).

    --ReadStaticMappings[optional]... Read StaticMappings from

./__admin/mappings (default set to true).

    --ProxyURL[optional]... The ProxyURL to use.

    --SaveProxyMapping[optional]... Save the proxied request and

response mapping files in ./__admin/mappings. (default set to true).

    --X509Certificate2ThumbprintOrSubjectName[optional]... The

X509Certificate2 Thumbprint or SubjectName to use.

    --AdminUsername[optional]... The username needed for __admin access.

    --AdminPassword[optional]... The password needed for __admin access.

    --RequestLogExpirationDuration[optional]... The RequestLog

expiration in hours (optional).

    --MaxRequestLogCount[optional]... The MaxRequestLog count (optional).

Unhandled Exception: CommandLineParser.Exceptions.InvalidConversionException: Type System.Nullable1[System.Int32] of argument 100 is not a built-in type.Set ConvertValueHandler to a convers ion routine for this type or define static method Parse(string stringValue, CultureInfo cultureInfo) that can Parse your type from string. at CommandLineParser.Arguments.ValueArgument1.DefaultConvert(String stringValue) at CommandLineParser.Arguments.ValueArgument1.Convert(String stringValue) at CommandLineParser.Arguments.ValueArgument1.Parse(IList`1 args, Int32& i) at CommandLineParser.CommandLineParser.ParseCommandLine(String[] args) at WireMock.Net.StandAlone.StandAloneApp.Start(String[] args) in C:\Users\StefHeyenrath\Documents\GitHub\WireMock.Net\src\WireMock.Net.StandAlone\StandAloneApp.cs:line 146 at WireMock.Net.StandAlone.NETCoreApp.Program.Main(String[] args) in C:\Users\StefHeyenrath\Documents\GitHub\WireMock.Net\examples\WireMock.Net.StandAlone.NETCoreApp\Program.cs:line 14

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[StefH]

I doubt if this is Net Core 2.0 related, actually I think that this code (https://github.com/j-maly/CommandLineParser/blob/e891473b225d49c48fcb53508cd15489c1b4a3f8/src/CommandLineArgumentsParser/Arguments/ValueArgument.cs#L388) cannot work if it's a Nullable type.

I think you need this code:

if (valueType.IsGenericType && valueType.GetGenericTypeDefinition() == typeof(Nullable<>))
{
    valueType = Nullable.GetUnderlyingType(valueType);
}
MethodInfo mi = valueType.GetMethod("Parse", new [] { typeof(string), typeof(CultureInfo)});
if (mi != null)
{
  if (mi.IsStatic && mi.ReturnType == valueType)
  {
    return stringValue != null ? (TValue)mi.Invoke(null, new object[] { stringValue, _cultureInfo }) : null;
  }
}

See my example at: https://github.com/WireMock-Net/WireMock.Net-docker/blob/master/CommandLineParserTest/Program.cs#L16-L19

Also verify for null: https://github.com/WireMock-Net/WireMock.Net-docker/blob/master/CommandLineParserTest/Program.cs#L46

[StefH]

Should I make a PR + unit-tests for this issue?