<launch>
  <param name="/use_sim_time" value="true" />
  <param name="param" value="value" />
  <group ns="group">
    <param name="param" value="group_value" />
  </group>
  
  <node name="fake_time" pkg="test_rosmaster" type="fake_time.py" />
  <node name="talker" pkg="test_rospy" type="talker.py" />
  <node name="a2iserver" pkg="test_rosmaster" type="add_two_ints_server" />
  
  <test test-name="rospy_client" pkg="test_rospy" type="test_rospy_client_online.py" />
</launch>
