| # |
| # Copyright (c) 2021 Project CHIP Authors |
| # All rights reserved. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| |
| |
| from chip.tlv import TLVWriter, TLVReader |
| from chip.tlv import uint as tlvUint |
| |
| import unittest |
| |
| |
| class TestTLVWriter(unittest.TestCase): |
| def _getEncoded(self, val, tag=None): |
| writer = TLVWriter() |
| writer.put(tag, val) |
| return writer.encoding |
| |
| def test_int(self): |
| encodedVal = self._getEncoded(0x00deadbeefca00fe) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000011, |
| 0xfe, 0x00, 0xca, 0xef, 0xbe, 0xad, 0xde, 0x00])) |
| encodedVal = self._getEncoded(0x7cadbeef) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000010, 0xef, 0xbe, 0xad, 0x7c])) |
| encodedVal = self._getEncoded(0x7cad) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000001, 0xad, 0x7c])) |
| encodedVal = self._getEncoded(0x7c) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000000, 0x7c])) |
| # Negative numbers |
| encodedVal = self._getEncoded(-(0x5555555555555555)) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000011, |
| 0xab, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa])) |
| encodedVal = self._getEncoded(-(0x55555555)) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000010, 0xab, 0xaa, 0xaa, 0xaa])) |
| encodedVal = self._getEncoded(-(0x5555)) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000001, 0xab, 0xaa])) |
| encodedVal = self._getEncoded(-(0x55)) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000000, 0xab])) |
| # The following numbers are positive values but exceeds the upper bounds of the type they seems to be. |
| encodedVal = self._getEncoded(0xdeadbeef) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000011, 0xef, 0xbe, 0xad, 0xde, 0x00, 0x00, 0x00, 0x00])) |
| encodedVal = self._getEncoded(0xdead) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000010, 0xad, 0xde, 0x00, 0x00])) |
| encodedVal = self._getEncoded(0xad) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000001, 0xad, 0x00])) |
| # Similar, these negative numbers also exceedes the width of the type they seems to be. |
| encodedVal = self._getEncoded(-(0xaaaaaaaa)) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000011, 0x56, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff])) |
| encodedVal = self._getEncoded(-(0xaaaa)) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000010, 0x56, 0x55, 0xff, 0xff])) |
| encodedVal = self._getEncoded(-(0xaa)) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000001, 0x56, 0xff])) |
| try: |
| encodedVal = self._getEncoded(0xf000f000f000f000) |
| self.fail("Signed number exceeds INT64_MAX but no exception received") |
| except Exception: |
| pass |
| |
| try: |
| encodedVal = self._getEncoded(-(0xf000f000f000f000)) |
| self.fail("Signed number exceeds INT64_MIN but no exception received") |
| except Exception: |
| pass |
| |
| def test_uint(self): |
| encodedVal = self._getEncoded(tlvUint(0xdeadbeefca0000fe)) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000111, |
| 0xfe, 0x00, 0x00, 0xca, 0xef, 0xbe, 0xad, 0xde])) |
| encodedVal = self._getEncoded(tlvUint(0xdeadbeef)) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000110, 0xef, 0xbe, 0xad, 0xde])) |
| encodedVal = self._getEncoded(tlvUint(0xdead)) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000101, 0xad, 0xde])) |
| encodedVal = self._getEncoded(tlvUint(0xde)) |
| self.assertEqual(encodedVal, |
| bytearray([0b00000100, 0xde])) |
| try: |
| encodedVal = self._getEncoded(tlvUint(-1)) |
| self.fail("Negative unsigned int but no exception raised.") |
| except Exception: |
| pass |
| try: |
| encodedVal = self._getEncoded(tlvUint(0x10000000000000000)) |
| self.fail("Overflowed uint but no exception raised.") |
| except Exception: |
| pass |
| |
| |
| class TestTLVReader(unittest.TestCase): |
| def _read_case(self, input, answer): |
| decoded = TLVReader(bytearray(input)).get()["Any"] |
| self.assertEqual(type(decoded), type(answer)) |
| self.assertEqual(decoded, answer) |
| |
| def test_int(self): |
| self._read_case([0b00000011, |
| 0xfe, 0x00, 0xca, 0xef, 0xbe, 0xad, 0xde, 0x00], 0x00deadbeefca00fe) |
| self._read_case([0b00000010, 0xef, 0xbe, 0xad, 0x7c], 0x7cadbeef) |
| self._read_case([0b00000001, 0xad, 0x7c], 0x7cad) |
| self._read_case([0b00000000, 0x7c], 0x7c) |
| |
| self._read_case([0b00000011, |
| 0xab, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa], -(0x5555555555555555)) |
| self._read_case([0b00000010, 0xab, 0xaa, 0xaa, 0xaa], -(0x55555555)) |
| self._read_case([0b00000001, 0xab, 0xaa], -(0x5555)) |
| self._read_case([0b00000000, 0xab], -(0x55)) |
| |
| def test_uint(self): |
| self._read_case([0b00000111, |
| 0xfe, 0x00, 0xca, 0xef, 0xbe, 0xad, 0xde, 0x00], tlvUint(0x00deadbeefca00fe)) |
| self._read_case([0b00000110, 0xef, 0xbe, 0xad, 0x7c], |
| tlvUint(0x7cadbeef)) |
| self._read_case([0b00000101, 0xad, 0x7c], tlvUint(0x7cad)) |
| self._read_case([0b00000100, 0x7c], tlvUint(0x7c)) |
| |
| self._read_case([0b00000111, |
| 0xab, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa], tlvUint(0xaaaaaaaaaaaaaaab)) |
| self._read_case([0b00000110, 0xab, 0xaa, 0xaa, 0xaa], |
| tlvUint(0xaaaaaaab)) |
| self._read_case([0b00000101, 0xab, 0xaa], tlvUint(0xaaab)) |
| self._read_case([0b00000100, 0xab], tlvUint(0xab)) |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |
