No valid values defined for var=VarDef[200.Content.Media-Type]

[mneiferbag]

I just got started with OpenAPI and Tcases. Please be patient. I have a question about the following error message from Tcases.

[ERROR] Failed to execute goal org.cornutum.tcases:tcases-maven-plugin:3.7.1:api (default-cli) on project jaxrs: Can't generate requested models: FunctionInputDef[POST_verb]: Can't create test cases: Can't complete tuples -- no valid values defined for var=VarDef[200.Content.Media-Type] -> [Help 1]

It seems to me, that Tcases requires a media-type for a post response 200. Afaik this is not required by the OpenAPI 3.0 spec. Is this check configurable in Tcases? I had a look at mvn tcases:help -Ddetail=true -Dgoal=api but found nothing.

Thanks in advance!

[kerrykimbrough]

You did not attach an OpenAPI definition to reproduce this problem. However, I was able to reproduce this symptom using a response definition with an empty content map -- see below. But that's a peculiar way to say "no content". A simpler way is to just omit the content field entirely, in which case the problem goes away. Assuming this matches your situation, that would be an easy fix. Do you agree?

{
    "openapi": "3.0.0",
    "info": {
        "title": "Responses",
        "version": "0.0.0"
    },
    "paths": {
        "/responses": {
            "get": {
                "responses": {
                    "200": {
                        "description": "No content",
                        "content": {
                        }
                    }
                }
            }
        }
    }
}

On the one hand, dropping the content will cure the failure and clarify the API definition. On the other hand, I agree that an empty content should be a valid way to say "no content", so that's a Tcases defect that ought to be fixed.

[mneiferbag]

Thank you for your answer and my apologies for omitting the definition. You can view it online.

https://raw.githubusercontent.com/mneiferbag/java-jaxrs/main/src/main/resources/api_v3.yaml

You are right, I use content: {}. Please note that I'm no expert in API design and this is just a toy project to get started with API testing and Tcases.

I have removed all occurences of content: {} and I can now run mvn tcases:api without errors. I have checked my adjusted definition with editor.swagger.io and I see no errors or warnings. I will continue with this definition.

[kerrykimbrough]

See also issue #213