def test_escape(self):
self.assertEqual(
encode.information_frame(0x7e, b'\x7d'),
FLAG + b'\x7d\x5e\x00\x7d\x5d' + _fcs(b'\x7e\x00\x7d') + FLAG)
self.assertEqual(
encode.information_frame(0x7d, b'A\x7e\x7dBC'),
FLAG + b'\x7d\x5d\x00A\x7d\x5e\x7d\x5dBC' +
_fcs(b'\x7d\x00A\x7e\x7dBC') + FLAG)
def channel_output(writer: Callable[[bytes], Any],
address: int = DEFAULT_ADDRESS,
delay_s: float = 0) -> Callable[[bytes], None]:
"""Returns a function that can be used as a channel output for pw_rpc."""
if delay_s:
def slow_write(data: bytes) -> None:
"""Slows down writes in case unbuffered serial is in use."""
for byte in data:
time.sleep(delay_s)
writer(bytes([byte]))
return lambda data: slow_write(encode.information_frame(address, data))
return lambda data: writer(encode.information_frame(address, data))
def test_1byte(self):
self.assertEqual(encode.information_frame(0, b'A'),
FLAG + _with_fcs(b'\0\0A') + FLAG)
def test_multibyte(self):
self.assertEqual(encode.information_frame(0, b'123456789'),
FLAG + _with_fcs(b'\x00\x00123456789') + FLAG)
def test_empty(self):
self.assertEqual(encode.information_frame(0, b''),
FLAG + _with_fcs(b'\0\0') + FLAG)
self.assertEqual(encode.information_frame(0x1a, b''),
FLAG + _with_fcs(b'\x1a\0') + FLAG)