PYTHON-2443 Fix TypeError when pyOpenSSL socket has timeout of None (#527)

(cherry picked from commit 5625860)

Author: ShaneHarvey

pymongo/socket_checker.py

@@ -41,7 +41,7 @@ def __init__(self):
             self._poller = None
 
     def select(self, sock, read=False, write=False, timeout=0):
-        """Select for reads or writes with a timeout in seconds.
+        """Select for reads or writes with a timeout in seconds (or None).
 
         Returns True if the socket is readable/writable, False on timeout.
         """
@@ -57,7 +57,8 @@ def select(self, sock, read=False, write=False, timeout=0):
                     try:
                         # poll() timeout is in milliseconds. select()
                         # timeout is in seconds.
-                        res = self._poller.poll(timeout * 1000)
+                        timeout_ = None if timeout is None else timeout * 1000
+                        res = self._poller.poll(timeout_)
                         # poll returns a possibly-empty list containing
                         # (fd, event) 2-tuples for the descriptors that have
                         # events or errors to report. Return True if the list

test/test_pooling.py

@@ -21,7 +21,10 @@
 import threading
 import time
 
-from pymongo import MongoClient
+from bson.son import SON
+from bson.codec_options import DEFAULT_CODEC_OPTIONS
+
+from pymongo import MongoClient, message
 from pymongo.errors import (AutoReconnect,
                             ConnectionFailure,
                             DuplicateKeyError,
@@ -259,6 +262,37 @@ def test_socket_closed(self):
         s.close()
         self.assertTrue(socket_checker.socket_closed(s))
 
+    def test_socket_checker(self):
+        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        s.connect((client_context.host, client_context.port))
+        socket_checker = SocketChecker()
+        # Socket has nothing to read.
+        self.assertFalse(socket_checker.select(s, read=True))
+        self.assertFalse(socket_checker.select(s, read=True, timeout=0))
+        self.assertFalse(socket_checker.select(s, read=True, timeout=.05))
+        # Socket is writable.
+        self.assertTrue(socket_checker.select(s, write=True, timeout=None))
+        self.assertTrue(socket_checker.select(s, write=True))
+        self.assertTrue(socket_checker.select(s, write=True, timeout=0))
+        self.assertTrue(socket_checker.select(s, write=True, timeout=.05))
+        # Make the socket readable
+        _, msg, _ = message.query(
+            0, 'admin.$cmd', 0, -1, SON([('isMaster', 1)]), None,
+            DEFAULT_CODEC_OPTIONS)
+        s.sendall(msg)
+        # Block until the socket is readable.
+        self.assertTrue(socket_checker.select(s, read=True, timeout=None))
+        self.assertTrue(socket_checker.select(s, read=True))
+        self.assertTrue(socket_checker.select(s, read=True, timeout=0))
+        self.assertTrue(socket_checker.select(s, read=True, timeout=.05))
+        # Socket is still writable.
+        self.assertTrue(socket_checker.select(s, write=True, timeout=None))
+        self.assertTrue(socket_checker.select(s, write=True))
+        self.assertTrue(socket_checker.select(s, write=True, timeout=0))
+        self.assertTrue(socket_checker.select(s, write=True, timeout=.05))
+        s.close()
+        self.assertTrue(socket_checker.socket_closed(s))
+
     def test_return_socket_after_reset(self):
         pool = self.create_pool()
         with pool.get_socket({}) as sock: