Validator does not check a response body if response content is not present in OpenApi spec

I have some endpoints which return nothing except the HTTP status code.

responses:
  204:
    description: OK

In the case of no schema in spec, I expect to get a validation error if the real response body is not empty.

As far as I understand this is due to ResponseValidator returning empty ValidationReport if apiResponse.content is null.

if (apiResponse.getContent() == null) {
    return ValidationReport.empty();
}

In another case, if apiResponse contains schema but the response body is missing (and the response has empty content-type) I get no error too.

if (!mostSpecificMatch.isPresent()) {
    // Validation of invalid content type is handled in content type validation
    return ValidationReport.empty();
}

I added nullable and required fields in my schema objects.

nullable: false
required:
  - foo
  - bar

But they work only during schema validation. If the response body and content-type are missing they are not used.

I’m not sure if this is an issue since perhaps this behavior is correct. In my project, I use custom MissingBodyResponseValidator to validate the response body is not empty if the schema is present in spec and vice versa.

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