Csharp/anyof oneof mixed primitive object parse error

[ForgeRubenAguilar]

Deserialization fails for C# client models using anyOf/oneOf with json primitive/array types. Triages #16686

This is the current workaround we're using with just the templates, but afaik this will produce uncompilable code if the template needs to generate a ctor with Object args.

Rather than feeding everything to JObject which will fail for primitives/array json tokens. It uses a switch to deserialize the token appropriate to its json token type. The property setter does validation on the typing, though the types will be wrong for non-string types as JsonReader gives Int64s and Doubles back regardless of the json typing, which doesn't jive with the generated C# type validation in the setter.

I added the repro to issue data, but I was unsure where those tests would live. I saw mention of CI tests. Would that cover the in language generation?

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[wing328]

FYI @mandrean (2017/08) @shibayan (2020/02) @Blackclaws (2021/03) @lucamazzanti (2021/05) @iBicha (2023/07)

[wing328]

Thanks for the PR.

Please add tests to the test spec and update test file to cover the issues moving forward.

test file: samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools.Test/JSONComposedSchemaTests.cs

test spec: modules/openapi-generator/src/test/resources/3_0/csharp/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml

[ForgeRubenAguilar]

@wing328 This should be ready now. Added some tests around the anyOf/oneOf round trip json serialization to samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools.Test/JSONComposedSchemaTests.cs

This solution only covers primitives. Covering enums will require more work around logic in the template building the json deserializer, especially with potentially mixed String/Enum type parsing.

[wing328]

Some CI tests failed. Can you please take a look when you've time?

For https://github.com/OpenAPITools/openapi-generator/actions/runs/6503860025/job/17710059790?pr=16706, you will need to update ./bin/utils/test_file_list.yaml ?

[wing328]

thanks for the PR. closed via #17986