def test_decode_unknown_type():
"""
Test the decode routine rejects frames it cannot recognise.
"""
frame = AX25UnnumberedInformationFrame(destination='APZAIO',
source='VK4MSL-7',
pid=0xf0,
payload=b'X A mystery frame X')
decoded = APRSFrame.decode(frame, logging.getLogger('decoder'))
assert_is(decoded, frame)
def test_decode_message():
"""
Test the decode routine can recognise a message frame.
"""
frame = AX25UnnumberedInformationFrame(destination='APZAIO',
source='VK4MSL-7',
pid=0xf0,
payload=b':VK4MDL-7 :Hi')
decoded = APRSFrame.decode(frame, logging.getLogger('decoder'))
assert_is_not(decoded, frame)
assert isinstance(decoded, APRSMessageFrame)
def test_decode_wrong_pid():
"""
Test the decode routine ignores UI frames with wrong PID.
"""
frame = AX25UnnumberedInformationFrame(
destination='APZAIO',
source='VK4MSL-7',
pid=0x80, # Not correct for APRS, should not get decoded.
payload=b'Test frame that\'s not APRS')
decoded = APRSFrame.decode(frame, logging.getLogger('decoder'))
assert_is(decoded, frame)
def test_decode_no_payload():
"""
Test the decode routine rejects frames without a payload.
"""
frame = AX25UnnumberedInformationFrame(
destination='APZAIO',
source='VK4MSL-7',
pid=0xf0,
payload=b'' # Empty payload
)
decoded = APRSFrame.decode(frame, logging.getLogger('decoder'))
assert_is(decoded, frame)
def test_decode_message_ack():
"""
Test the decode routine can recognise a message acknowledgement frame.
"""
frame = AX25UnnumberedInformationFrame(destination='APZAIO',
source='VK4MSL-7',
pid=0xf0,
payload=b':VK4MDL-7 :ack2')
decoded = APRSFrame.decode(frame, logging.getLogger('decoder'))
assert_is_not(decoded, frame)
assert isinstance(decoded, APRSMessageAckFrame)
eq_(decoded.msgid, '2')
def test_decode_message_replyack_reply():
"""
Test the decode routine can recognise a message frame sent as a
reply-ack.
"""
frame = AX25UnnumberedInformationFrame(destination='APZAIO',
source='VK4MSL-7',
pid=0xf0,
payload=b':VK4MDL-7 :Hi{01}45')
decoded = APRSFrame.decode(frame, logging.getLogger('decoder'))
assert_is_not(decoded, frame)
assert isinstance(decoded, APRSMessageFrame)
eq_(decoded.replyack, '45')
eq_(decoded.msgid, '01')