TypeScript generator assumes all responses are JSON

[ColinEberhardt]

See: https://github.com/ScottLogic/openapi-forge-typescript/blob/main/template/fetch.ts#L8

This is probably true for the JS generator also

[ColinEberhardt]

Looking at the spec, despite the media type specifying application/json, primitive values are indeed acceptable https://swagger.io/specification/#schema-object

[ColinEberhardt]

After further exploration, this is not a bug. Strings, when returned from the API, should be quoted, making them valid JSON. For example "hello" is valid JSON.

The Petstore example API server has a bug relating to this. I've raised a PR:

swagger-api/swagger-petstore#95