def test_create_thumbnail_with_given_dimensions_and_image_mode_in_create_thumbnail(self, image):
attachment = Attachment(attachment=Mock())
attachment.mimetype = "x/y"
attachment.create_thumbnail(max_size=2)
image.open.return_value.thumbnail.assert_called_once_with((2, 2), image.ANTIALIAS)
def test_open_image_with_stringio_of_attachment_in_create_thumbnail(self, image_class, stringio):
attachment = Attachment(attachment=Mock())
attachment.mimetype = "x/y"
attachment.create_thumbnail(max_size=100)
self.assertEqual(((attachment.attachment,), {}), stringio.call_args_list[0])
image_class.open.assert_called_once_with(stringio.return_value)
