An empty object as the request body generates an invalid TS definition

[vojty]

Description

An empty object as the request body generates an invalid TS definitionL

export interface operations {

  /**
   * Test 
   * @description Body is ignored
   */
  test: {
    requestBody?: "*/*": never; // <-------------------------------
    responses: {
      /** @description No Content */
      204: never;
      /** @description Bad Request */
      400: never;
    };
  };
}

Name	Version
openapi-typescript	6.2.8
Node.js	18.6.0

Reproduction

Example YAML:

openapi: 3.0.1
info:
  title: Test
  version: 1.0.0
  license:
    name: MIT
    url: https://opensource.org/licenses/MIT
servers:
  - url: http://localhost:8080
security:
  - api_keys: []
paths:
  /api/v1/test:
    post:
      operationId: test
      summary: Test
      description: Body is ignored
      requestBody:
        required: false
        content: {}
      responses:
        204:
          description: No Content
        400:
          description: Bad Request
components:
  securitySchemes:
    api_keys:
      description: |
        Generate your secret API key in the app settings.
      name: secret-key
      type: apiKey
      in: header

The problem can be mitigated by removing requestBody completely in this case, but still it shouldn't generate invalid TS syntax.

Expected result

(in case it’s not obvious)

Checklist

• My OpenAPI schema passes the Redocly validator (npx @redocly/cli@latest lint)
• I’m willing to open a PR (see CONTRIBUTING.md)

[drwpow]

Thanks for the great example! This should be an easy find & fix.

[drwpow]

Related: #1109