oliverdavies.uk/tools/Phpat/ArchitectureTest.php

<?php

declare(strict_types=1);

namespace Tools\Phpat;

use PHPat\Selector\Selector;
use PHPat\Test\Builder\Rule;
use PHPat\Test\PHPat;

final class ArchitectureTest {

  public function test_all_classes_should_be_final(): Rule {
    return PHPat::rule()
      ->classes(
        Selector::inNamespace(
          namespace: '/^Drupal\\\\opd_\w+/',
          regex: TRUE,
        ),
      )
      ->excluding(Selector::isInterface())
      ->shouldBeFinal();
  }

}