Laravel dusk browser macro for asserting that the text in an element has not changed from the previously set baseline

DuskServiceProvider.php

class DuskBrowserServiceProvider extends ServiceProvider
{
  /**
   * Bootstrap the application services.
   *
   * @return void
   */
  public function boot(): void
  {
    Browser::macro('assertExpectedDomText', function (string $selector): Browser {
      /** @var \Laravel\Dusk\Browser $browser */
      $browser = $this;
      $actualDom = $browser->element($selector)->getText();

      $fileName = parse_url($browser->page->url())['path'] . $selector . '.txt';

      $sourcesDirectoryPath = resource_path('/dusk/expected-dom');

      if (!is_dir($sourcesDirectoryPath)) {
          @mkdir($sourcesDirectoryPath, 0777, true);
      }

      $filePath = "{$sourcesDirectoryPath}/{$fileName}";

      if (!file_exists($filePath)) {
          file_put_contents($filePath, $actualDom, LOCK_EX);
      }

      $expected = file_get_contents($filePath);

      Assert::assertSame($expected, $actualDom);

      return $browser;
    });
  }
}