bandwidthThrottle\tokenBucket\storage\FileStorage::setMicrotime PHP Метод

    public function setMicrotime($microtime)
    {
        if (fseek($this->fileHandle, 0) !== 0) {
            throw new StorageException("Could not move to beginning of the file.");
        }
        $data = DoublePacker::pack($microtime);
        $result = fwrite($this->fileHandle, $data, strlen($data));
        if ($result !== strlen($data)) {
            throw new StorageException("Could not write to storage.");
        }
    }

 /**
  * Tests writings fails in setMicrotime().
  *
  * @expectedException bandwidthThrottle\tokenBucket\storage\StorageException
  */
 public function testSetMicrotimeFailsWriting()
 {
     $this->getFunctionMock(__NAMESPACE__, "fwrite")->expects($this->atLeastOnce())->willReturn(false);
     vfsStream::setup('test');
     $storage = new FileStorage(vfsStream::url("test/data"));
     $storage->setMicrotime(1.1234);
 }