1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
#!/usr/bin/env python3
# Copyright 2020 The Pigweed Authors
#
# 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
#
# https://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.
"""Tests encoding HDLC frames."""
import unittest
from pw_hdlc import encode
from pw_hdlc import protocol
from pw_hdlc.protocol import frame_check_sequence as _fcs
FLAG = bytes([protocol.FLAG])
def _with_fcs(data: bytes) -> bytes:
return data + _fcs(data)
class TestEncodeUIFrame(unittest.TestCase):
"""Tests Encoding bytes with different arguments using a custom serial."""
def test_empty(self):
self.assertEqual(
encode.ui_frame(0, b''), FLAG + _with_fcs(b'\x01\x03') + FLAG
)
self.assertEqual(
encode.ui_frame(0x1A, b''), FLAG + _with_fcs(b'\x35\x03') + FLAG
)
def test_1byte(self):
self.assertEqual(
encode.ui_frame(0, b'A'), FLAG + _with_fcs(b'\x01\x03A') + FLAG
)
def test_multibyte(self):
self.assertEqual(
encode.ui_frame(0, b'123456789'),
FLAG + _with_fcs(b'\x01\x03123456789') + FLAG,
)
def test_multibyte_address(self):
self.assertEqual(
encode.ui_frame(128, b'123456789'),
FLAG + _with_fcs(b'\x00\x03\x03123456789') + FLAG,
)
def test_escape(self):
self.assertEqual(
encode.ui_frame(0x3E, b'\x7d'),
FLAG + b'\x7d\x5d\x03\x7d\x5d' + _fcs(b'\x7d\x03\x7d') + FLAG,
)
self.assertEqual(
encode.ui_frame(0x3E, b'A\x7e\x7dBC'),
FLAG
+ b'\x7d\x5d\x03A\x7d\x5e\x7d\x5dBC'
+ _fcs(b'\x7d\x03A\x7e\x7dBC')
+ FLAG,
)
if __name__ == '__main__':
unittest.main()
|
