openapi: 3.0.0

info:
  title: test
  description: test case for nullable enum value
  version: "1.0"
  contact:
    name: me

servers:
  - url: https://test.ops/v1
    description: Main API server

tags:
  - name: test

paths:
  /event/create:
    post:
      operationId: createEvent
      summary: Create a new event
      description: todo
      tags:
        - test
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                event_type:
                  type: string
                result:
                  type: string
                  nullable: true
                  enum:
                    - OK
                    - FAILED
                    - null
              example:
                event_type: AccountBlocked
                result: null
      responses:
        '200':
          description: ok
        '500':
          description: not ok