`additionalProperties` doesn't work properly with `$ref`

Consider the following:

openapi: 3.0.1
info:
  title: Whatever
  version: 1.0.0
paths:
  /foo:
    post:
      operationId: getFoo
      responses:
        200:
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Foo'
components:
  schemas:
    Foo:
      type: object
      required:
        - something
        - props
      properties:
        something:
          type: string
        props:
          type: object
          additionalProperties:
            type: integer
            format: int32
    FooProps:
      type: object
      additionalProperties:
        type: integer
        format: int32
    FooNested:
      type: object
      required:
        - something
        - props
      properties:
        something:
          type: string
        props:
          $ref: "#/components/schemas/FooProps"

Foo comes out correct:

case class Foo(something: String, props: Map[String, Int])

However, I would expect FooNested to look the same, but instead we get:

case class FooNested(something: String, props: io.circe.Json)

(And FooProps isn’t emitted at all, as I guess we’d expect.)

[kelnos]

Ah yeah, looks like you fixed it: https://github.com/twilio/guardrail/commit/364a06c12fd8925100f825365d77dc27e7b491ae

[kelnos]

Yah, I’m working on a test now.