def test_get_device_path_unattached_volume(self):
        new_volume = self.api.create_volume(
            dataset_id=uuid4(),
            size=self.minimum_allocatable_size
        )
        exception = self.assertRaises(
            UnattachedVolume,
            self.api.get_device_path,
            new_volume.blockdevice_id
        )
        self.assertEqual(new_volume.blockdevice_id, exception.blockdevice_id)
:param w: widget to wrap (stored as self.original_widget)
dataset/ETHPy150Open ClusterHQ/flocker/flocker/node/agents/testtools/_blockdevice.py/IBlockDeviceAPITestsMixin.test_get_device_path_unattached_volume--crossover with--dataset/ETHPy150Open AnyMesh/anyMesh-Python/example/urwid/decoration.py/AttrMap.__init__