PHPUnit + openapi-validator で「スキーマが正、実装が追従」にする

openapi: 3.0.2
info:
  title: 蔵書管理システムAPIドキュメント
  description: 蔵書管理システムのAPIドキュメントです
  version: 1.0.0
servers:
  - url: https://example.com/api
    description: 本番環境
paths:
  /books:
    get:
      summary: 本の一覧
      description: |
        登録してある本の一覧を取得できます
      operationId: getBooks
      parameters:
        - name: borrow
          in: query
          description: |
            貸出中を含める
          required: false
          schema:
            type: boolean
            example: true
      responses:
        200:
          description: 成功
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/book'
components:
  schemas:
    book:
      title: Book
      description: Bookのスキーマです。
      required:
        - id
        - title
        - created_at
        - updated_at
      type: object
      properties:
        id:
          type: integer
        title:
          type: string
        created_at:
          type: string
        updated_at:
          type: string
      example:
        id: "1"
        title: "Love beautiful code"
        created_at: "2019-07-08 15:22:15"
        updated_at: "2019-07-08 15:22:15"

response => Validator = (OK) => Green
                      = (NG) => Red

<?php

namespace Tests\Feature;

use Tests\TestCase;
use Mmal\OpenapiValidator\Validator;
use Symfony\Component\Yaml\Yaml;


class ApiV1Test extends TestCase
{
    /** @var Validator */
    static $openApiValidator;

    public static function setUpBeforeClass()
    {
        parent::setUpBeforeClass();
        self::$openApiValidator = new Validator(Yaml::parse(file_get_contents(resource_path('docs/apiV1.yml'))));
    }

    /**
     * @test
     */
    public function getBooks()
    {
        $response = $this->get('api/book');

        $result = self::$openApiValidator->validate('getBooks', 200, json_decode($response->getContent(), true));
        $this->assertFalse($result->hasErrors(), $result);
    }
}