PYTHON-1227 - Don't use select.POLLNVAL

It causes problems with Jython and seems unnecessary
since we know the fd represents an open socket.

pymongo/network.py

@@ -24,8 +24,8 @@ _HAS_POLL = True
 _EVENT_MASK = 0
 try:
     from select import poll
-    _EVENT_MASK = (select.POLLIN | select.POLLPRI | select.POLLERR |
-                   select.POLLHUP | select.POLLNVAL)
+    _EVENT_MASK = (
+        select.POLLIN | select.POLLPRI | select.POLLERR | select.POLLHUP)
 except ImportError:
     _HAS_POLL = False
 

test/test_client.py

@@ -314,7 +314,6 @@ class TestClient(IntegrationTest):
                        "a closed socket gets replaced from the pool")
             self.assertFalse(sock_info in server._pool.sockets)
 
-    @unittest.skipIf(sys.platform.startswith('java'), 'PYTHON-1227')
     def test_max_idle_time_checkout(self):
         # Use high frequency to test _get_socket_no_auth.
         with client_knobs(kill_cursor_frequency=99999999):

test/test_pooling.py

@@ -191,7 +191,6 @@ class TestPooling(_TestPoolingBase):
     def test_disconnect(self):
         run_cases(self.c, [InsertOneAndFind, Disconnect, Unique])
 
-    @unittest.skipIf(sys.platform.startswith('java'), 'PYTHON-1227')
     def test_pool_reuses_open_socket(self):
         # Test Pool's _check_closed() method doesn't close a healthy socket.
         cx_pool = self.create_pool(max_pool_size=10)
@@ -250,7 +249,6 @@ class TestPooling(_TestPoolingBase):
         with cx_pool.get_socket({}):
             pass
 
-    @unittest.skipIf(sys.platform.startswith('java'), 'PYTHON-1227')
     def test_socket_closed(self):
         s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         s.connect((client_context.host, client_context.port))
@@ -330,7 +328,6 @@ class TestPooling(_TestPoolingBase):
 
         sock_info.close()
 
-    @unittest.skipIf(sys.platform.startswith('java'), 'PYTHON-1227')
     def test_no_wait_queue_timeout(self):
         # Verify get_socket() with no wait_queue_timeout blocks forever.
         pool = self.create_pool(max_pool_size=1)