/** * @return void */ public function testTruncates() { $filePath = __DIR__ . '/example_write1.txt'; $fileObject = new FileWriter($filePath, 'a+'); $fileObject->truncates(13); $filePath = __DIR__ . '/example_write2.txt'; $fileObject = new \SplFileObject($filePath, 'a+'); $fileObject->ftruncate(13); }