fix: 按 K-00 约定修复 Python SDK 断线重交与退避

sdk/python/tests/test_client.py

@@ -7,8 +7,9 @@ import threading
 import time
 import unittest
 
-from nixmsg import Body, Client, ConnectionState, FakeTransport, NixMsgError, SendOptions, Target
+from nixmsg import Body, Client, ConnectionState, NixMsgError, SendOptions, Target
 from nixmsg.protocol import dumps
+from nixmsg.transport import FakeTransport
 
 
 class FakeTransportTests(unittest.TestCase):
@@ -48,6 +49,7 @@ class FakeTransportTests(unittest.TestCase):
         c = Client(transport=tr)
         c.on_session(lambda t: tokens.append(t))
         c.connect("ws://example.test/mqtt", "ep1", password="pw")
+        time.sleep(0.05)
         self.assertEqual(tokens, ["nst_test_token"])
         self.assertEqual(c.session_token, "nst_test_token")
         c.close()