Predis\Connection\Factory::undefine PHP Method

    public function undefine($scheme)
    {
        unset($this->schemes[$scheme]);
    }

 /**
  * @group disconnected
  * @expectedException \InvalidArgumentException
  * @expecteExceptionMessage Unknown connection scheme: 'test'.
  */
 public function testDefineAndUndefineConnection()
 {
     list(, $connectionClass) = $this->getMockConnectionClass();
     $factory = new Factory();
     $factory->define('test', $connectionClass);
     $this->assertInstanceOf($connectionClass, $factory->create('test://127.0.0.1'));
     $factory->undefine('test');
     $factory->create('test://127.0.0.1');
 }