remove() public method

public remove ( )
 /**
  * Tests deleting fails.
  *
  * @test
  * @expectedException bandwidthThrottle\tokenBucket\storage\StorageException
  */
 public function testRemoveFails()
 {
     $data = new vfsStreamFile("data");
     $root = vfsStream::setup('test');
     $root->chmod(0);
     $root->addChild($data);
     $storage = new FileStorage(vfsStream::url("test/data"));
     $storage->remove();
 }