fix add server start test

re6st/tests/test_network/re6st_wrap.py

@@ -9,6 +9,7 @@ import time
 import re
 from subprocess import PIPE, call
 from pathlib2 import Path
+import logging
 
 import re6st.tests.tools as tools
 
@@ -34,6 +35,15 @@ def ip_to_serial(ip6):
     return int(ip6, 16)
 
 
+def wait_ps(p, timeout=1, sec=0.1):
+    """implement timeout of wait"""
+    now = time.time()
+    while time.time() -timeout < now:
+        if p.poll() is not None:
+            return
+        time.sleep(sec)
+    raise Exception("{}, not terminate".format(p.pid))
+
 class Re6stRegistry(object):
     """class run a re6st-registry service on a namespace"""
     registry_seq = -1
@@ -67,6 +77,25 @@ class Re6stRegistry(object):
 
         self.run()
 
+        # wait the servcice started
+        p = self.node.Popen(['python', '-c', """if 1:
+        import socket, time
+        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        while True:
+            try:
+                s.connect(('localhost', 80))
+                break
+            except socket.error:
+                time.sleep(.1)
+        """])
+        try:
+            wait_ps(p, 5)
+        except Exception as e:
+            logging.error("{}: {}", self.name, e)
+            raise e
+        logging.info("re6st service started")
+
+
     @classmethod
     def generate_name(cls):
         cls.registry_seq += 1