def test_lsb_encode_1bit_png(self):
encoded = tempfile.NamedTemporaryFile(suffix='.png')
lsb_encode(self.png_image, encoded, 'Hello world!')
decoded_bytes = lsb_decode(encoded)
self.assertEqual(decoded_bytes[:12], b'Hello world!')
def test_lsb_encode_1bit(self):
image = create_random_image(15, 15)
res = lsb_encode(image, None, 'Hello world!')
res_bytes = lsb_decode(res)
self.assertEqual(res_bytes[:12], b'Hello world!')