public function testInterface()
 {
     $interface = new PhpInterface();
     $interface->setDescription('my interface')->setLongDescription('this is my very long description')->setConstant($this->getConstant())->setMethod($this->getMethod());
     $interface->generateDocblock();
     $this->assertFalse($interface->getDocblock()->isEmpty());
     $this->assertNotNull($interface->getMethod(self::METHOD)->getDocblock());
     $this->assertNotNull($interface->getConstant(self::CONSTANT)->getDocblock());
 }