subscribe_empty.cpp

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/*
 * Copyright (c) 2008, Willow Garage, Inc.
 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
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 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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/* Author: Brian Gerkey */
 
/*
 * Subscribe to a topic, expecting to get a number of messages based on the first command line argument
 */
 
#include <string>
 
#include <gtest/gtest.h>
 
#include <time.h>
#include <stdlib.h>
 
#include "ros/ros.h"
#include <test_roscpp/TestEmpty.h>
 
int g_argc;
char** g_argv;
 
class Subscriptions : public testing::Test
{
  public:
    test_roscpp::TestEmpty msg;
    bool success;
    bool failure;
    int msg_count;
    int msg_i;
    ros::Duration dt;
 
    void messageCallback(const test_roscpp::TestEmptyConstPtr&)
    {
      if(failure || success)
        return;
 
      msg_i++;
      printf("received message %d\n", msg_i);
      if(msg_i == (msg_count-1))
      {
        success = true;
        puts("success");
      }
    }
 
  protected:
    Subscriptions() {}
    void SetUp()
    {
      success = false;
      failure = false;
 
      msg_i = -1;
      ASSERT_TRUE(g_argc == 3);
      msg_count = atoi(g_argv[1]);
      dt.fromSec(atof(g_argv[2]));
    }
    void TearDown()
    {
    }
};
 
TEST_F(Subscriptions, emptyMsg)
{
  ros::NodeHandle nh;
  ros::Subscriber sub = nh.subscribe("roscpp/pubsub_test", msg_count, &Subscriptions::messageCallback, (Subscriptions*)this);
  ros::Time t1(ros::Time::now()+dt);
 
  while(ros::Time::now() < t1 && !success)
  {
    ros::WallDuration(0.01).sleep();
    ros::spinOnce();
  }
 
  if(success)
    SUCCEED();
  else
    FAIL();
}
 
int main(int argc, char** argv)
{
  ros::init(argc, argv, "subscribe_empty");
  ros::NodeHandle nh;
 
  testing::InitGoogleTest(&argc, argv);
  g_argc = argc;
  g_argv = argv;
  return RUN_ALL_TESTS();
}