New test case for packets data, so far here are the tests for:

varint, protocol.encodeHost(), protocol.CreatePacket() - only checks magic

src/tests/samples.py

@@ -3,6 +3,8 @@
 from binascii import unhexlify
 
 
+magic = 0xE9BEB4D9
+
 # These keys are from addresses test script
 sample_pubsigningkey = unhexlify(
     '044a367f049ec16cb6b6118eb734a9962d10b8db59c890cd08f210c43ff08bdf09d'
@@ -14,6 +16,7 @@ sample_privsigningkey = \
     b'93d0b61371a54b53df143b954035d612f8efa8a3ed1cf842c2186bfd8f876665'
 sample_privencryptionkey = \
     b'4b0b73a54e19b059dc274ab69df095fe699f43b17397bca26fdf40f4d7400a3a'
+
 sample_ripe = b'003cd097eb7f35c87b5dc8b4538c22cb55312a9f'
 # stream: 1, version: 2
 sample_address = 'BM-onkVu1KKL2UaUss5Upg9vXmqd3esTmV79'

src/tests/test_packets.py

@@ -0,0 +1,68 @@
+
+import unittest
+from binascii import unhexlify
+from struct import pack
+
+from pybitmessage import addresses, protocol
+
+from .samples import magic
+
+
+class TestSerialize(unittest.TestCase):
+    """Test serializing and deserializing packet data"""
+
+    def test_varint(self):
+        """Test varint encoding and decoding"""
+        data = addresses.encodeVarint(0)
+        self.assertEqual(data, b'\x00')
+        data = addresses.encodeVarint(42)
+        self.assertEqual(data, b'*')
+        data = addresses.encodeVarint(252)
+        self.assertEqual(data, unhexlify('fc'))
+        data = addresses.encodeVarint(253)
+        self.assertEqual(data, unhexlify('fd00fd'))
+        data = addresses.encodeVarint(100500)
+        self.assertEqual(data, unhexlify('fe00018894'))
+        data = addresses.encodeVarint(65535)
+        self.assertEqual(data, unhexlify('fdffff'))
+        data = addresses.encodeVarint(4294967295)
+        self.assertEqual(data, unhexlify('feffffffff'))
+        data = addresses.encodeVarint(4294967296)
+        self.assertEqual(data, unhexlify('ff0000000100000000'))
+        data = addresses.encodeVarint(18446744073709551615)
+        self.assertEqual(data, unhexlify('ffffffffffffffffff'))
+
+        with self.assertRaises(addresses.varintEncodeError):
+            addresses.encodeVarint(18446744073709551616)
+
+        value, length = addresses.decodeVarint(b'\xfeaddr')
+        self.assertEqual(value, protocol.OBJECT_ADDR)
+        self.assertEqual(length, 5)
+        value, length = addresses.decodeVarint(b'\xfe\x00tor')
+        self.assertEqual(value, protocol.OBJECT_ONIONPEER)
+        self.assertEqual(length, 5)
+
+    def test_packet(self):
+        """Check the packet created by protocol.CreatePacket()"""
+        head = unhexlify(b'%x' % magic)
+        self.assertEqual(
+            protocol.CreatePacket(b'ping')[:len(head)], head)
+
+    def test_encodehost(self):
+        """Check the result of protocol.encodeHost()"""
+        self.assertEqual(
+            protocol.encodeHost('127.0.0.1'),
+            b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF'
+            + pack('>L', 2130706433))
+        self.assertEqual(
+            protocol.encodeHost('191.168.1.1'),
+            unhexlify('00000000000000000000ffffbfa80101'))
+        self.assertEqual(
+            protocol.encodeHost('1.1.1.1'),
+            unhexlify('00000000000000000000ffff01010101'))
+        self.assertEqual(
+            protocol.encodeHost('0102:0304:0506:0708:090A:0B0C:0D0E:0F10'),
+            unhexlify('0102030405060708090a0b0c0d0e0f10'))
+        self.assertEqual(
+            protocol.encodeHost('quzwelsuziwqgpt2.onion'),
+            unhexlify('fd87d87eeb438533622e54ca2d033e7a'))