allOf validation not working?

Riproduci la richiesta JSON PATCH verso /pets utilizzando il documento OpenAPI fornito e il riferimento allOf dello schema Cat a Pet. Traccia il modo in cui il validator risolve Pet e la relativa proprietà ereditata pet_type, quindi stabilisci se la richiesta viene accettata oppure perché la validazione la rifiuta. Nell’issue non sono indicati file di progetto o test.

Hi, I'm having issues getting an example spec using allOf to work. This is the spec, as provided by the OpenAPI docs:

openapi: 3.0.0
info:
  title: AllOf.v1
  version: '1.0'
servers:
  - url: 'http://localhost:3000'
paths:
  /pets:
    patch:
      requestBody:
        content:
          application/json:
            schema:
              oneOf:
                - $ref: '#/components/schemas/Cat'
                - $ref: '#/components/schemas/Dog'
              discriminator:
                propertyName: pet_type
      responses:
        '200':
          description: Updated
components:
  schemas:
    Pet:
      type: object
      required:
        - pet_type
      properties:
        pet_type:
          type: string
    Dog: # "Dog" is a value for the pet_type property (the discriminator value)
      allOf: # Combines the main `Pet` schema with `Dog`-specific properties
        - $ref: '#/components/schemas/Pet'
        - type: object
          # all other properties specific to a `Dog`
          properties:
            bark:
              type: boolean
            breed:
              type: string
              enum: [ Dingo, Husky, Retriever, Shepherd ]
    Cat: # "Cat" is a value for the pet_type property (the discriminator value)
      allOf: # Combines the main `Pet` schema with `Cat`-specific properties
        - $ref: '#/components/schemas/Pet'
        - type: object
          # all other properties specific to a `Cat`
          properties:
            hunts:
              type: boolean
            age:
              type: integer

My test attempts to send a JSON PATCH request to the /pets endpoint, using:

[
    'pet_type' => 'Cat',
    'age' => 3,
    'hunts' => true,
]

However, this only results in:

Request body did not match provided JSON schema.

Digging in a bit more, it appears that the validator doesn't see the pet_type property it should be inheriting from the Pet component.

Any experience with this, or ideas? Thanks in advance.