Fix and improve test_queue:

- decrease timeout, remove unneeded sleep;
  - make and check objects from the data received in message queue;
  - add docstrings.

minode/tests/test_queue.py

@@ -1,11 +1,15 @@
+"""Test interprocess queues"""
 import time
 
 import zmq
 
+from minode import structure, message
+
 from .test_process import TestProcessProto
 
 
 class TestProcessQueue(TestProcessProto):
+    """A test case starting the process with queues"""
     _process_cmd = ['minode', '--msg-queue']
 
     @classmethod
@@ -14,7 +18,7 @@ class TestProcessQueue(TestProcessProto):
         context = zmq.Context()
         cls.socket = context.socket(zmq.SUB)
         cls.socket.connect('tcp://localhost:5556')
-        cls.socket.setsockopt(zmq.RCVTIMEO, 120000)
+        cls.socket.setsockopt(zmq.RCVTIMEO, 5000)
         cls.socket.setsockopt(zmq.SUBSCRIBE, b'obj')
 
     def test_receive_msg(self):
@@ -28,11 +32,15 @@ class TestProcessQueue(TestProcessProto):
             try:
                 tag, data = self.socket.recv().split(b'\x00', 1)
             except zmq.error.Again:
-                time.sleep(2)
                 continue
-            else:
+
             c += 1
             self.assertEqual(tag, b'obj')
+            obj_type, data = data.split(b'\x00', 1)
+            obj = structure.Object.from_message(
+                message.Message(b'object', data))
+            self.assertEqual(int(obj_type), obj.object_type)
+            self.assertTrue(obj.is_valid())
 
         if c == 0:
             self.fail('No messages received in %ss' % timeout)