def METHOD_NAME(self):
    """
    Check if upload_from_file is called when we call GoogleCloudStorage.save().
    """
    self.storage.save("myfile.jpg", self.content, blob_object=self.blob_obj)
    # Check that blob.upload_from_file() has been called inside storage.save()
    self.blob_obj.upload_from_file.assert_called()