test_embed_msg.py

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#!/usr/bin/env python
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from __future__ import print_function
 
PKG = 'test_rospy'
NAME = 'test_embed_msg'
 
import sys
import time
import unittest
 
import rospy
import rostest
from std_msgs.msg import String, Int32
from test_rospy.msg import EmbedTest, Val, ArrayVal
 
PUBTOPIC = "chatter"
LPNODE = 'listenerpublisher'
LPTOPIC = 'listenerpublisher'
 
MSG = EmbedTest
 
TIMEOUT = 10.0 #seconds
 
class TestEmbedMsg(unittest.TestCase):
 
    def setUp(self):
        self.callback_data = None
        
    def _test_embed_msg_callback(self, data):
        self.callback_data = data
    
    def test_embed_msg(self):
        self.assertTrue(self.callback_data is None, "invalid test fixture")
 
        # wait at most 5 seconds for listenerpublisher to be registered
        timeout_t = time.time() + 5.0
        while not rostest.is_subscriber(
            rospy.resolve_name(PUBTOPIC),
            rospy.resolve_name(LPNODE)) and time.time() < timeout_t:
            time.sleep(0.1)
 
        self.assertTrue(rostest.is_subscriber(
            rospy.resolve_name(PUBTOPIC),
            rospy.resolve_name(LPNODE)), "%s is not up"%LPNODE)
        
        print("Publishing to ", PUBTOPIC)
        pub = rospy.Publisher(PUBTOPIC, MSG, queue_size=0)
        rospy.Subscriber(LPTOPIC, MSG, self._test_embed_msg_callback) 
 
        # publish about 10 messages for fun
        import random
        val = random.randint(0, 109812312)
        msg = "hi [%s]"%val
        for i in range(0, 10):
            # The test message could be better in terms of the values
            # it assigns to leaf fields, but the main focus is trying
            # to dig up edge conditions in the embeds, especially with
            # respect to arrays and embeds.
            pub.publish(
                MSG(String(msg), Int32(val),
                    [Int32(val+1), Int32(val+2), Int32(val+3)],
                    Val(msg+msg),
                    [Val(msg), Val("two")],
                    [ArrayVal([Val("av1"), Val("av2")]), #[Val("%s"%i) for i in range(0, 10)]),
                     ArrayVal([]) #,[Val("%s"%i) for i in range(0, 10)]),
                     ]
                    ))
            time.sleep(0.1)
 
        # listenerpublisher is supposed to repeat our messages back onto /listenerpublisher,
        # make sure we got it
        self.assertTrue(self.callback_data is not None, "no callback data from listenerpublisher")
        print("Got ", self.callback_data.str1.data, self.callback_data.int1.data)
        errorstr = "callback msg field [%s] from listenerpublisher does not match"
        self.assertEqual(msg, self.callback_data.str1.data,
                          errorstr%"str1.data")
        self.assertEqual(val, self.callback_data.int1.data,
                          errorstr%"int1.data")
        for i in range(1, 4):
            self.assertEqual(val+i, self.callback_data.ints[i-1].data,
                              errorstr%"ints[i-1].data")
        self.assertEqual(msg+msg, self.callback_data.val.val,
                          errorstr%"val.val")
        self.assertEqual(msg, self.callback_data.vals[0].val,
                          errorstr%"vals[0].val")
        self.assertEqual("two", self.callback_data.vals[1].val,
                          errorstr%"vals[1].val")
        # #435: test array of arrays
        self.assertEqual(2, len(self.callback_data.arrayval),
                          errorstr%"len arrayval")
        self.assertEqual(2, len(self.callback_data.arrayval[0].vals),
                          errorstr%"len arrayval[0].vals")
        self.assertEqual("av1", self.callback_data.arrayval[0].vals[0].val,
                          errorstr%"arrayval[0].vals[0].val")
        self.assertEqual("av2", self.callback_data.arrayval[0].vals[1].val,
                          errorstr%"arrayval[0].vals[1].val")
        self.assertEqual(0, len(self.callback_data.arrayval[1].vals),
                          errorstr%"len arrayval[1].vals")
 
        
if __name__ == '__main__':
    rospy.init_node(NAME)
    rostest.run(PKG, NAME, TestEmbedMsg, sys.argv)