Until v2.0.2, a request parameter that's non-nullable in Kotlin code wasn't marked as required in the openapi docs if a
default value was provided in the @RequestParameter annotation.
Since v2.0.3, such parameters are marked as required, even though the SpringMVC endpoint works perfectly fine without providing a value.
See HelloController for an example.
OpenApiTest checks that the api docs didn't change from a documentation that was created with v2.0.2.
This refers to springdoc/springdoc-openapi#2149