'``SerializableArgument`` can round-trip a ``NonManifestDatasets``
instance.'

def test_nonmanifestdatasets(self):

    argument = SerializableArgument(NonManifestDatasets)
    as_bytes = argument.toString(NONMANIFEST)
    deserialized = argument.fromString(as_bytes)
    self.assertEqual([bytes, NONMANIFEST], [type(as_bytes), deserialized])
