def test_write_long(self):
writer = BigEndianByteArrayByteWriter()
long_to_write = 0xF1F2F3F4F5F6F7F8
writer.write_long(long_to_write)
self.assertEqual(writer.get_n_bytes_written(), 8)
self.assertEqual(writer.data, bytearray([0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8]))
