test_service_failure.py

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#!/usr/bin/env python
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## Integration test for empty services to test serializers
## and transport

PKG = 'test_rospy'
NAME = 'empty_service'

import sys, time
import unittest

import rostest

class TestServiceFailure(unittest.TestCase):
        
    def test_persistent(self):
        # fail_two_ints succeeds unless the first argument is -1.
        # this makes sure, in the persistent case, that the proxy handle remains valid after a call
        from test_rosmaster.srv import AddTwoInts
        import rospy
        rospy.wait_for_service('fail_two_ints', 10.)
        p = rospy.ServiceProxy('fail_two_ints', AddTwoInts, persistent=True)
        for a in [1, -1, 1, -1, -1, -1, -1, 1]:
            try:
                resp = p(a, 1)
                if a == 1:
                    self.assertEquals(resp.sum, 2)
                else:
                    self.fail("service call should have failed: %s,%s, %s"%(a, 1, resp.sum))
            except rospy.ServiceException as e:
                if a == -1:
                    # expected
                    pass
                else:
                    self.fail("service call failed when it shouldn't have: %s"%str(e))

    def test_non_persistent(self):
        # fail_two_ints succeeds unless the first argument is -1.
        # this makes sure, in the non-persistent case, that the proxy handle remains valid after a call
        from test_rosmaster.srv import AddTwoInts
        import rospy
        rospy.wait_for_service('fail_two_ints', 10.)
        p = rospy.ServiceProxy('fail_two_ints', AddTwoInts)
        for a in [1, -1, 1, -1, -1, -1, -1, 1]:
            try:
                resp = p(a, 1)
                if a == 1:
                    self.assertEquals(resp.sum, 2)
                else:
                    self.fail("service call should have failed")
            except rospy.ServiceException:
                if a == -1:
                    # expected
                    pass
                else:
                    self.fail("service call should have failed")
        
        
if __name__ == '__main__':
    rostest.run(PKG, 'rospy_service_failure', TestServiceFailure, sys.argv)