def test_write_int(self): writer = LittleEndianByteArrayByteWriter() int_to_write = 0xF1F2F3F4 writer.write_int(int_to_write) self.assertEqual(writer.get_n_bytes_written(),4) self.assertEqual(writer.data,bytearray([0xF4, 0xF3, 0xF2,0xF1]))