test loading petstore.yaml

[ctaggart]

I'm getting a NRE when simply trying to load the petstore.yaml.
https://github.com/OAI/OpenAPI-Specification/blob/master/examples/v2.0/yaml/petstore.yaml

Test Name:	AutoRest.Modeler.Tests.SwaggerModelerXmlTests.TestModelOfPetstore
Test FullName:	AutoRest.Modeler.Tests.SwaggerModelerXmlTests.TestModelOfPetstore
Test Source:	C:\Users\taggac\github\autorest.modeler\test\SwaggerModelerXmlTests.cs : line 69
Test Outcome:	Failed
Test Duration:	0:00:00.327

Result StackTrace:	
at AutoRest.Modeler.ObjectBuilder.BuildServiceType(String serviceTypeName, Boolean required) in C:\Users\taggac\github\autorest.modeler\src\ObjectBuilder.cs:line 49
   at AutoRest.Modeler.ParameterBuilder.ParentBuildServiceType(String serviceTypeName, Boolean required) in C:\Users\taggac\github\autorest.modeler\src\ParameterBuilder.cs:line 98
   at AutoRest.Modeler.ParameterBuilder.BuildServiceType(String serviceTypeName, Boolean required) in C:\Users\taggac\github\autorest.modeler\src\ParameterBuilder.cs:line 95
   at AutoRest.Modeler.ParameterBuilder.Build() in C:\Users\taggac\github\autorest.modeler\src\ParameterBuilder.cs:line 54
   at AutoRest.Modeler.OperationBuilder.BuildMethodParameters(Method method) in C:\Users\taggac\github\autorest.modeler\src\OperationBuilder.cs:line 291
   at AutoRest.Modeler.OperationBuilder.BuildMethod(HttpMethod httpMethod, String url, String methodName, String methodGroup) in C:\Users\taggac\github\autorest.modeler\src\OperationBuilder.cs:line 100
   at AutoRest.Modeler.SwaggerModeler.BuildMethod(HttpMethod httpMethod, String url, String name, Operation operation) in C:\Users\taggac\github\autorest.modeler\src\SwaggerModeler.cs:line 404
   at AutoRest.Modeler.SwaggerModeler.Build(ServiceDefinition serviceDefinition) in C:\Users\taggac\github\autorest.modeler\src\SwaggerModeler.cs:line 106
   at AutoRest.Modeler.Tests.SwaggerModelerXmlTests.TestModelOfPetstore() in C:\Users\taggac\github\autorest.modeler\test\SwaggerModelerXmlTests.cs:line 75
Result Message:	System.NullReferenceException : Object reference not set to an instance of an object.

[OzBob]

After converting
https://petstore.swagger.io/v2/swagger.json
to OpenAPI 3.0.1

by loading it into https://editor.swagger.io/ then Edit | Convert to Open API 3 - > sending it to https://converter.swagger.io/api/convert

downloading the resultant json and using

Autorest --v3 --input-file=petstore3.json --csharp --output-folder=petstore --namespace=petstore

results in:

   Loading AutoRest extension '@microsoft.azure/autorest.csharp' (~2.3.79->2.3.84)
   Loading AutoRest extension '@microsoft.azure/autorest.modeler' (2.3.55->2.3.55)
FATAL: System.ArgumentNullException: Value cannot be null.
Parameter name: source
   at System.Linq.Enumerable.Select[TSource,TResult](IEnumerable1 source, Func2 selector)
   at AutoRest.Modeler.Model.RequestBody.AsParameters() in /opt/vsts/work/1/s/src/Model/RequestBody.cs:line 38

Feature Request: add a --debug flag to have line numbers /paths etc. output to console during run of extensions

[OzBob]

raised in: Azure/autorest#3464