def test_initialise_directories(self):
        directory = FilePath(self.mktemp()).child('loopback')
        self.assertDirectoryStructure(directory)
``from_path`` creates a directory structure if it doesn't already
dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/test/test_blockdevice.py/LoopbackBlockDeviceAPIImplementationTests.test_initialise_directories