Fix x-ms-enum as discriminator

[sergey-shandar]

Issue #325

[vladbarosan]

Approved with a comment, please refer the issue on type change for jsonRefs

[veronicagg]

@sergey-shandar could you expand on your resolution for my question/comment: "there are cases were this should be true, like on enums not part of discriminator types, how are we affecting those cases? we generally recommend modelAsString= true for specs, to avoid breaking changes in future api-versions for code generation, so I'd like to understand more of what's not working due to this value for the tool"

[sergey-shandar]

@veronicagg this fix is only applied for a specific model (internally generated) when we know exact value that we expect.

oav/lib/validators/specResolver.ts

Line 950 in d5bfd41

d.enum = [`${val}`]

Honestly, modelAsString in a discriminator may cause serious issues, because in this case we don't really know how to desterilize the structure if the value is not name of one of the polymorphic model. What's the fallback should be? Base class?