def it_can_construct_from_an_image_blob(self, blob_, BytesIO_,
_from_stream_, stream_, image_):
image = Image.from_blob(blob_)
BytesIO_.assert_called_once_with(blob_)
_from_stream_.assert_called_once_with(stream_, blob_)
assert image is image_
def image(self):
if self._image is None:
self._image = Image.from_blob(self.blob)
return self._image