Implement a service connection handler counter, use it in Pathod test suite

Lots of failures, but that's a good thing.

netlib/tcp.py

@@ -833,6 +833,25 @@ class BaseHandler(_Connection):
             return b""
 
 
+class Counter:
+    def __init__(self):
+        self._count = 0
+        self._lock = threading.Lock()
+
+    @property
+    def count(self):
+        with self._lock:
+            return self._count
+
+    def __enter__(self):
+        with self._lock:
+            self._count += 1
+
+    def __exit__(self, *args):
+        with self._lock:
+            self._count -= 1
+
+
 class TCPServer(object):
     request_queue_size = 20
 
@@ -845,8 +864,10 @@ class TCPServer(object):
         self.socket.bind(self.address())
         self.address = Address.wrap(self.socket.getsockname())
         self.socket.listen(self.request_queue_size)
+        self.counter = Counter()
 
     def connection_thread(self, connection, client_address):
+        with self.counter:
             client_address = Address(client_address)
             try:
                 self.handle_client_connection(connection, client_address)

pathod/test.py

@@ -7,6 +7,10 @@ from six.moves import queue
 from . import pathod
 
 
+class TimeoutError(Exception):
+    pass
+
+
 class Daemon:
     IFACE = "127.0.0.1"
 
@@ -40,6 +44,17 @@ class Daemon:
     def text_log(self):
         return self.logfp.getvalue()
 
+    def wait_for_silence(self, timeout=5):
+        start = time.time()
+        while 1:
+            if time.time() - start >= timeout:
+                raise TimeoutError(
+                    "%s service threads still alive" %
+                    self.thread.server.counter.count
+                )
+            if self.thread.server.counter.count == 0:
+                return
+
     def expect_log(self, n, timeout=5):
         l = []
         start = time.time()

test/pathod/tutils.py

@@ -64,6 +64,7 @@ class DaemonTests(object):
         shutil.rmtree(cls.confdir)
 
     def teardown(self):
+        self.d.wait_for_silence()
         if not (self.noweb or self.noapi):
             self.d.clear_log()