params_basic.py

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#!/usr/bin/env python
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PKG = 'test_roslaunch'

import os, sys, unittest

try:
    from xmlrpc.client import Binary
except ImportError:
    from xmlrpclib import Binary
import rostest
import rospkg

import rosgraph
master = rosgraph.Master('params_basic')
def get_param(*args):
    return master.getParam(*args)
    
## Test Roslaunch 'param' tags
class TestParamsBasic(unittest.TestCase):

    ## test primitive values
    def test_values(self):
        ## Test roslaunch string params
        self.assertEquals(get_param('stringempty'), '')
        print(get_param('stringbar'))
        self.assertEquals(get_param('stringbar'), 'bar')
        self.assertEquals(get_param('str10'), '10')
        self.assertEquals(get_param('string10'), '10')        
        self.assertEquals(get_param('stringentity'), '<stringentity/>')        
        ## Test roslaunch integer params
        self.assertEquals(get_param("integerneg1"), -1)
        self.assertEquals(get_param("integer0"), 0)
        self.assertEquals(get_param("integer1"), 1)
        self.assertEquals(get_param("integernoop1"), 1)
        self.assertEquals(get_param("integer12345"), 12345)
        ## Test roslaunch float params
        self.assertEquals(get_param("floatpi"),3.14159)
        self.assertEquals(get_param("floatnooppi"),3.14159)
        self.assertEquals(get_param("float3"),3.0)
        self.assertEquals(get_param("floatneg1"),-1.0)
        ## Test roslaunch boolean params
        for p in ['true', 'TRUE', 'True']:
            self.assertTrue(get_param(p), "[%s] is not false: %s"%(p, get_param(p)))
        for p in ['false', "FALSE", 'False']:
            self.assertFalse(get_param(p), "[%s] is not false: %s"%(p, get_param(p)))
            
    ## Test roslaunch ns attribute (namespace) on params
    def test_ns(self):
        self.assertEquals(get_param("/wg/childparam"),"wg")
        self.assertEquals(get_param("/wg2/childparam"),"wg2")
        self.assertEquals(get_param("/wg3/childparam"),"wg3")
        self.assertEquals(get_param("/wg/wg4/childparam"),"wg4")
        self.assertEquals(get_param("/wg/wg4/wg5/childparam"),"wg5")          
        ## Test roslaunch <group> tag with and without ns attribute
        self.assertEquals(get_param("/wga/wg/childparam"),"wg")
        self.assertEquals(get_param("/wga/wg2/childparam"),"wg2")
        self.assertEquals(get_param("/wga/wg3/childparam"),"wg3")
        self.assertEquals(get_param("/wga/wg/wg4/childparam"),"wg4")
        self.assertEquals(get_param("/wga/wg/wg4/wg5/childparam"),"wg5")          
        # test second-level group
        self.assertEquals(get_param("/wga/wgb/wg/childparam"),"bwg")
        self.assertEquals(get_param("/wga/wgb/wg2/childparam"),"bwg2")
        self.assertEquals(get_param("/wga/wgb/wg3/childparam"),"bwg3")
        self.assertEquals(get_param("/wga/wgb/wg/wg4/childparam"),"bwg4")
        self.assertEquals(get_param("/wga/wgb/wg/wg4/wg5/childparam"),"bwg5")
        # test unscoped group
        self.assertEquals(get_param("/wgc/childparam"),"wg")
        self.assertEquals(get_param("/wgc2/childparam"),"wg2")
        self.assertEquals(get_param("/wgc3/childparam"),"wg3")
        self.assertEquals(get_param("/wgc/wg4/childparam"),"wg4")
        self.assertEquals(get_param("/wgc/wg4/wg5/childparam"),"wg5")          
        
    ## test 'command' attribute
    def test_commandandfile(self):
        dir = rospkg.RosPack().get_path('roslaunch')
        with open(os.path.join(dir, 'resources', 'example.launch'), 'r') as f:
            text_data = f.read()
        with open(os.path.join(dir, 'resources', 'example.launch'), 'rb') as f:
            binary_data = f.read()
        self.assertEquals(get_param("commandoutput"), binary_data)
        self.assertEquals(get_param("textfile"), text_data)
        ## test 'binfile' attribute
        bindata = get_param("binaryfile")
        self.assertTrue(isinstance(bindata, Binary))
        self.assertEquals(bindata.data, binary_data)
    
if __name__ == '__main__':
    rostest.rosrun(PKG, sys.argv[0], TestParamsBasic, sys.argv)