test__backdoor.py: do not leak the servers out of the test

greentest/test__backdoor.py

@@ -35,20 +35,26 @@ class Test(greentest.TestCase):
     def test_quit(self):
         server = backdoor.BackdoorServer(('127.0.0.1', 0))
         server.start()
-        conn = socket.create_connection(('127.0.0.1', server.server_port))
-        read_until(conn, '>>> ')
-        conn.sendall('quit()\r\n')
-        line = conn.makefile().read()
-        self.assertEqual(line, '')
+        try:
+            conn = socket.create_connection(('127.0.0.1', server.server_port))
+            read_until(conn, '>>> ')
+            conn.sendall('quit()\r\n')
+            line = conn.makefile().read()
+            self.assertEqual(line, '')
+        finally:
+            server.stop()
 
     def test_sys_exit(self):
         server = backdoor.BackdoorServer(('127.0.0.1', 0))
         server.start()
-        conn = socket.create_connection(('127.0.0.1', server.server_port))
-        read_until(conn, '>>> ')
-        conn.sendall('import sys; sys.exit(0)\r\n')
-        line = conn.makefile().read()
-        self.assertEqual(line, '')
+        try:
+            conn = socket.create_connection(('127.0.0.1', server.server_port))
+            read_until(conn, '>>> ')
+            conn.sendall('import sys; sys.exit(0)\r\n')
+            line = conn.makefile().read()
+            self.assertEqual(line, '')
+        finally:
+            server.stop()
 
 
 if __name__ == '__main__':