Doesn't take pattern field into account

[eelessam]

Hi I have the following contract

openapi: 3.0.0
info:
  title: ban-check
  version: '1.0'
servers:
  - url: 'http://localhost:3000'
paths:
  /demo-app/ban-check:
    post:
      summary: ban-check
      tags: []
      responses:
        201:
          description: Created
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                    enum:
                      - BANNED
                      - NOT_BANNED
                  tom:
                    type: string
                    enum:
                      - BANNED
                      - NOT_BANNED
                required:
                  - status
      parameters:
        - schema:
            type: string
            enum:
              - VENTURE1
              - VENTURE2
          in: header
          name: Venture-Name
          required: true
      requestBody:
        content:
          application/json:
            schema:
              type: object
              properties:
                dni:
                  type: string
                  minLength: 9
                  maxLength: 9
                  pattern: '^[A-Za-z0-9]+$'
              required:
                - dni
        description: Dni request
components:
  schemas: {}

To reproduce:

When I compare it with another contract that has a stricter pattern on the REGEX for example only numbers or only lower case, the change is not detected by the diff tool.

Expected behaviour:

It shows that the regex has changed and thus is a breaking change

[DrSatyr]

The issue is fixed. Meanwhile, all changes are considered breaking changes to keep it simple ATM. See details #724