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# SPDX-FileCopyrightText: Christian Amsüss and the aiocoap contributors
#
# SPDX-License-Identifier: MIT
import copy
import aiocoap
import aiocoap.optiontypes
import unittest
class TestMessage(unittest.TestCase):
def test_encode(self):
msg1 = aiocoap.Message(mtype=aiocoap.CON, mid=0, code=aiocoap.EMPTY)
binary1 = bytes((64, 0, 0, 0))
self.assertEqual(
msg1.encode(), binary1, "wrong encode operation for empty CON message"
)
msg2 = aiocoap.Message(
mtype=aiocoap.ACK,
mid=0xBC90,
code=aiocoap.CONTENT,
payload=b"temp = 22.5 C",
token=b"q",
)
msg2.opt.etag = b"abcd"
binary2 = (
bytes((97, 69, 188, 144, 113, 68))
+ b"abcd"
+ bytes((255,))
+ b"temp = 22.5 C"
)
self.assertEqual(
msg2.encode(),
binary2,
"wrong encode operation for ACK message with payload, and Etag option",
)
msg2short = binary2[0:5] + binary2[10:] # header, token, marker, data
msg2a = copy.deepcopy(msg2)
del msg2a.opt.etag
self.assertEqual(
msg2a.encode(), msg2short, "deleting single property did not succeed"
)
msg2b = copy.deepcopy(msg2)
del msg2b.opt.etags
self.assertEqual(
msg2b.encode(), msg2short, "deleting list property did not succeed"
)
msg2c = copy.deepcopy(msg2)
msg2c.opt.etags = []
self.assertEqual(
msg2c.encode(), msg2short, "emptying list property did not succeed"
)
msg2d = copy.deepcopy(msg2)
msg2d.opt.etag = None
self.assertEqual(
msg2d.encode(), msg2short, "setting single property to None did not succeed"
)
msg3 = aiocoap.Message()
self.assertRaises(TypeError, msg3.encode)
msg4 = aiocoap.Message(mtype=aiocoap.CON, mid=2 << 16)
self.assertRaises(Exception, msg4.encode)
msg5 = aiocoap.Message(mtype=aiocoap.CON, mid=0, code=aiocoap.EMPTY)
o = aiocoap.optiontypes.OpaqueOption(1234, value=b"abcd")
msg5.opt.add_option(o)
binary5 = binary1 + bytes((0xE4, 0x03, 0xC5)) + b"abcd"
self.assertEqual(
msg5.encode(), binary5, "wrong encoding for high option numbers"
)
msg6 = aiocoap.Message(mtype=aiocoap.CON, mid=0, code=aiocoap.EMPTY)
o = aiocoap.optiontypes.OpaqueOption(12345678, value=b"abcd")
msg6.opt.add_option(o)
self.assertRaises(ValueError, msg6.encode)
msg7 = aiocoap.Message(mtype=aiocoap.CON, mid=0, code=aiocoap.EMPTY)
def set_unknown_opt():
msg7.opt.foobar = 42
self.assertRaises(AttributeError, set_unknown_opt)
def test_decode(self):
rawdata1 = bytes((64, 0, 0, 0))
self.assertEqual(
aiocoap.Message.decode(rawdata1).mtype,
aiocoap.CON,
"wrong message type for decode operation",
)
self.assertEqual(
aiocoap.Message.decode(rawdata1).mid,
0,
"wrong message ID for decode operation",
)
self.assertEqual(
aiocoap.Message.decode(rawdata1).code,
aiocoap.EMPTY,
"wrong message code for decode operation",
)
self.assertEqual(
aiocoap.Message.decode(rawdata1).token,
b"",
"wrong message token for decode operation",
)
self.assertEqual(
aiocoap.Message.decode(rawdata1).payload,
b"",
"wrong message payload for decode operation",
)
rawdata2 = (
bytes((97, 69, 188, 144, 113, 68))
+ b"abcd"
+ bytes((255,))
+ b"temp = 22.5 C"
)
self.assertEqual(
aiocoap.Message.decode(rawdata2).mtype,
aiocoap.ACK,
"wrong message type for decode operation",
)
self.assertEqual(
aiocoap.Message.decode(rawdata2).mid,
0xBC90,
"wrong message ID for decode operation",
)
self.assertEqual(
aiocoap.Message.decode(rawdata2).code,
aiocoap.CONTENT,
"wrong message code for decode operation",
)
self.assertEqual(
aiocoap.Message.decode(rawdata2).token,
b"q",
"wrong message token for decode operation",
)
self.assertEqual(
aiocoap.Message.decode(rawdata2).payload,
b"temp = 22.5 C",
"wrong message payload for decode operation",
)
self.assertEqual(
aiocoap.Message.decode(rawdata2).opt.etags,
(b"abcd",),
"problem with etag option decoding for decode operation",
)
self.assertEqual(
len(aiocoap.Message.decode(rawdata2).opt._options),
1,
"wrong number of options after decode operation",
)
rawdata3 = rawdata1 + bytes((0xF0,))
self.assertRaises(
aiocoap.error.UnparsableMessage, aiocoap.Message.decode, rawdata3
) # message with option delta reserved for payload marker
rawdata4 = rawdata1 + bytes((0xE0,))
self.assertRaises(
aiocoap.error.UnparsableMessage, aiocoap.Message.decode, rawdata4
) # message with extended option delta that is not actually there
rawdata5 = rawdata1 + bytes((0x04,))
self.assertRaises(
aiocoap.error.UnparsableMessage, aiocoap.Message.decode, rawdata5
) # message with option that is not actually there
class TestReadExtendedFieldValue(unittest.TestCase):
def test_read_extended_field_value(self):
arguments = (
(0, b"aaaa"),
(0, b""),
(1, b"aaaa"),
(12, b"aaaa"),
(13, b"aaaa"),
(13, b"a"),
(14, b"aaaa"),
(14, b"aa"),
)
results = (
(0, b"aaaa"),
(0, b""),
(1, b"aaaa"),
(12, b"aaaa"),
(110, b"aaa"),
(110, b""),
(25198, b"aa"),
(25198, b""),
)
for argument, result in zip(arguments, results):
self.assertEqual(
aiocoap.options._read_extended_field_value(argument[0], argument[1]),
result,
"wrong result for value : "
+ repr(argument[0])
+ " , rawdata : "
+ repr(argument[1]),
)
class TestUintOption(unittest.TestCase):
def test_encode(self):
arguments = (0, 1, 2, 40, 50, 255, 256, 1000)
results = (
b"",
bytes((1,)),
bytes((2,)),
bytes((40,)),
bytes((50,)),
bytes((255,)),
bytes((1, 0)),
bytes((3, 232)),
)
for argument, result in zip(arguments, results):
self.assertEqual(
aiocoap.optiontypes.UintOption(0, argument).encode(),
result,
"wrong encode operation for option value : " + str(argument),
)
def test_decode(self):
arguments = (
b"",
bytes((1,)),
bytes((2,)),
bytes((40,)),
bytes((50,)),
bytes((255,)),
bytes((1, 0)),
bytes((3, 232)),
)
results = (0, 1, 2, 40, 50, 255, 256, 1000)
for argument, result in zip(arguments, results):
o = aiocoap.optiontypes.UintOption(0)
o.decode(argument)
self.assertEqual(
o.value, result, "wrong decode operation for rawdata : " + str(argument)
)
class TestOptions(unittest.TestCase):
def test_set_uri_path(self):
opt1 = aiocoap.options.Options()
opt1.uri_path = ["core"]
self.assertEqual(
len(opt1.get_option(aiocoap.OptionNumber.URI_PATH)),
1,
"wrong uri_path setter operation for single string argument",
)
self.assertEqual(
opt1.get_option(aiocoap.OptionNumber.URI_PATH)[0].value,
"core",
"wrong uri_path setter operation for single string argument",
)
opt2 = aiocoap.options.Options()
opt2.uri_path = ("core", ".well-known")
self.assertEqual(
len(opt2.get_option(aiocoap.OptionNumber.URI_PATH)),
2,
"wrong uri_path setter operation for 2-element tuple argument",
)
self.assertEqual(
opt2.get_option(aiocoap.OptionNumber.URI_PATH)[0].value,
"core",
"wrong uri_path setter operation for 2-element tuple argument",
)
self.assertEqual(
opt2.get_option(aiocoap.OptionNumber.URI_PATH)[1].value,
".well-known",
"wrong uri_path setter operation for 2-element tuple argument",
)
opt3 = aiocoap.options.Options()
self.assertRaises(TypeError, setattr, opt3, "uri_path", 42)
class TestOptiontypes(unittest.TestCase):
def test_optiontypes(self):
# from rfc725 table 4
on = aiocoap.numbers.OptionNumber
options = {
on.IF_MATCH: "C",
on.URI_HOST: "CU",
on.ETAG: "",
on.MAX_AGE: "U",
on.SIZE1: "N",
}
for o, expected in options.items():
self.assertEqual(
"C" in expected, o.is_critical(), "Unexpected criticalness of %r" % o
)
self.assertEqual(
"C" not in expected,
o.is_elective(),
"Unexpected electiveness of %r" % o,
)
self.assertEqual(
"U" in expected, o.is_unsafe(), "Unexpected unsafeness of %r" % o
)
self.assertEqual(
"U" not in expected,
o.is_safetoforward(),
"Unexpected safetoforwardness of %r" % o,
)
if o.is_safetoforward():
self.assertEqual(
"N" in expected,
o.is_nocachekey(),
"Unexpected nocachekeyness of %r" % o,
)
self.assertEqual(
"N" not in expected,
o.is_cachekey(),
"Unexpected cachekeyness of %r" % o,
)
else:
self.assertRaises(ValueError, o.is_nocachekey)
self.assertRaises(ValueError, o.is_cachekey)
class TestMessageOptionConstruction(unittest.TestCase):
def test_uri_construction(self):
message = aiocoap.Message(uri="coap://some-host:1234/some/path/")
self.assertEqual(message.opt.uri_host, "some-host")
self.assertEqual(message.opt.uri_port, None)
self.assertEqual(message.opt.uri_path, ("some", "path", ""))
def test_opt_roundtripping(self):
message = aiocoap.Message()
message.opt.content_format = 40
message.opt.etag = b"1234"
message.opt.uri_path = ()
self.assertEqual(message.opt.content_format, 40)
self.assertEqual(message.opt.etag, b"1234")
self.assertEqual(message.opt.uri_path, ())
def test_opt_construction(self):
message = aiocoap.Message(content_format=40, observe=b"1234", uri_path=())
self.assertEqual(message.opt.content_format, 40)
self.assertEqual(message.opt.observe, b"1234")
self.assertEqual(message.opt.uri_path, ())
def test_copy(self):
message = aiocoap.Message()
original_state = repr(message)
new_one = message.copy(
payload=b"x",
mid=42,
code=0,
mtype=3,
token=b"xyz",
observe=0,
content_format=1234,
)
self.assertEqual(original_state, repr(message), "Message.copy mutated original")
self.assertEqual(new_one.payload, b"x")
self.assertEqual(new_one.mid, 42)
self.assertEqual(new_one.token, b"xyz")
self.assertEqual(str(new_one.code), "EMPTY")
# "Type.RST" is also ok if the enum decides to have a different str,
# but it should be of mtype class and not just a number. Beware that
# other tests also look for the string versions (eg. "ACK EMPTY")
self.assertEqual(str(new_one.mtype), "RST")
self.assertEqual(new_one.opt.observe, 0)
self.assertEqual(new_one.opt.content_format, 1234)
new_two = new_one.copy(uri="coap://some-host/some/path")
self.assertEqual(new_two.opt.uri_path, ("some", "path"))
|
