Contao\CoreBundle\Security\User\ContaoUserProvider::supportsClass PHP Method

    public function supportsClass($class)
    {
        return is_subclass_of($class, 'Contao\\User');
    }

 /**
  * Tests the supportsClass() method.
  */
 public function testSupportsClass()
 {
     $container = new Container();
     $container->addScope(new Scope(ContaoCoreBundle::SCOPE_FRONTEND));
     $container->enterScope(ContaoCoreBundle::SCOPE_FRONTEND);
     $provider = new ContaoUserProvider($container, $this->framework);
     $this->assertTrue($provider->supportsClass('Contao\\FrontendUser'));
 }