def test_send_receive(self):
event = threading.Event()
buf, seq, action = array.array('B'), 5, stentura._OPEN
request = stentura._make_request(array.array('B'), stentura._OPEN, seq)
correct_response = make_response(seq, action)
wrong_seq = make_response(seq - 1, action)
wrong_action = make_response(seq, action + 1)
bad_response = make_response(seq, action, data="foo", length=15)
# Correct response first time.
responses = [correct_response]
port = MockPacketPort(responses)
response = stentura._send_receive(port, event, request, buf)
self.assertSequenceEqual(response, correct_response)
# Timeout once then correct response.
responses = ['', correct_response]
port = MockPacketPort(responses)
response = stentura._send_receive(port, event, request, buf,
timeout=0.001)
self.assertSequenceEqual(response, correct_response)
# Wrong sequence number then correct response.
responses = [wrong_seq, correct_response]
port = MockPacketPort(responses)
response = stentura._send_receive(port, event, request, buf)
self.assertSequenceEqual(response, correct_response)
# No correct responses. Also make sure max_retries is honored.
max_tries = 6
responses = [''] * max_tries
port = MockPacketPort(responses)
with self.assertRaises(stentura._ConnectionLostException):
stentura._send_receive(port, event, request, buf, max_tries,
timeout=0.0001)
self.assertEqual(max_tries, port.writes)
# Wrong action.
responses = [wrong_action]
port = MockPacketPort(responses)
with self.assertRaises(stentura._ProtocolViolationException):
stentura._send_receive(port, event, request, buf)
# Bad packet.
responses = [bad_response]
port = MockPacketPort(responses)
with self.assertRaises(stentura._ProtocolViolationException):
stentura._send_receive(port, event, request, buf)
# Stopped.
responses = []
event.set()
port = MockPacketPort(responses)
with self.assertRaises(stentura._StopException):
stentura._send_receive(port, event, request, buf)
def test_send_receive(self):
event = threading.Event()
buf, seq, action = array.array('B'), 5, stentura._OPEN
request = stentura._make_request(array.array('B'), stentura._OPEN, seq)
correct_response = make_response(seq, action)
wrong_seq = make_response(seq - 1, action)
wrong_action = make_response(seq, action + 1)
bad_response = make_response(seq, action, data="foo", length=15)
# Correct response first time.
responses = [correct_response]
port = MockPacketPort(responses)
response = stentura._send_receive(port, event, request, buf)
self.assertSequenceEqual(response, correct_response)
# Timeout once then correct response.
responses = ['', correct_response]
port = MockPacketPort(responses)
response = stentura._send_receive(port, event, request, buf,
timeout=0.001)
self.assertSequenceEqual(response, correct_response)
# Wrong sequence number then correct response.
responses = [wrong_seq, correct_response]
port = MockPacketPort(responses)
response = stentura._send_receive(port, event, request, buf)
self.assertSequenceEqual(response, correct_response)
# No correct responses. Also make sure max_retries is honored.
max_tries = 6
responses = [''] * max_tries
port = MockPacketPort(responses)
with self.assertRaises(stentura._ConnectionLostException):
stentura._send_receive(port, event, request, buf, max_tries,
timeout=0.0001)
self.assertEqual(max_tries, port.writes)
# Wrong action.
responses = [wrong_action]
port = MockPacketPort(responses)
with self.assertRaises(stentura._ProtocolViolationException):
stentura._send_receive(port, event, request, buf)
# Bad packet.
responses = [bad_response]
port = MockPacketPort(responses)
with self.assertRaises(stentura._ProtocolViolationException):
stentura._send_receive(port, event, request, buf)
# Stopped.
responses = []
event.set()
port = MockPacketPort(responses)
with self.assertRaises(stentura._StopException):
stentura._send_receive(port, event, request, buf)
def test_make_request(self):
buf = array.array('B')
seq = 2
action = stentura._OPEN
p1, p2, p3, p4, p5 = 1, 2, 3, 4, 5
p = stentura._make_request(buf, action, seq, p1, p2, p3, p4, p5)
for_crc = [seq, 18, 0, action, 0, p1, 0, p2, 0, p3, 0, p4, 0, p5, 0]
crc = stentura._crc(for_crc)
expected = [1] + for_crc + [crc & 0xFF, crc >> 8]
self.assertSequenceEqual(p, [chr(b) for b in expected])
# Now with data.
data = 'Testing Testing 123'
p = stentura._make_request(buf, action, seq, p1, p2, p3, p4, p5, data)
length = 18 + len(data) + 2
for_crc = [seq, length & 0xFF, length >> 8, action, 0,
p1, 0, p2, 0, p3, 0, p4, 0, p5, 0]
crc = stentura._crc(for_crc)
data_crc = stentura._crc(data)
expected = ([1] + for_crc + [crc & 0xFF, crc >> 8] +
[ord(b) for b in data] + [data_crc & 0xFF, data_crc >> 8])
self.assertSequenceEqual(p, [chr(b) for b in expected])
def test_make_request(self):
buf = array.array('B')
seq = 2
action = stentura._OPEN
p1, p2, p3, p4, p5 = 1, 2, 3, 4, 5
p = stentura._make_request(buf, action, seq, p1, p2, p3, p4, p5)
for_crc = [seq, 18, 0, action, 0, p1, 0, p2, 0, p3, 0, p4, 0, p5, 0]
crc = stentura._crc(for_crc)
expected = [1] + for_crc + [crc & 0xFF, crc >> 8]
self.assertSequenceEqual(p, [chr(b) for b in expected])
# Now with data.
data = 'Testing Testing 123'
p = stentura._make_request(buf, action, seq, p1, p2, p3, p4, p5, data)
length = 18 + len(data) + 2
for_crc = [seq, length & 0xFF, length >> 8, action, 0,
p1, 0, p2, 0, p3, 0, p4, 0, p5, 0]
crc = stentura._crc(for_crc)
data_crc = stentura._crc(data)
expected = ([1] + for_crc + [crc & 0xFF, crc >> 8] +
[ord(b) for b in data] + [data_crc & 0xFF, data_crc >> 8])
self.assertSequenceEqual(p, [chr(b) for b in expected])
