#!/usr/bin/env python

#

# Copyright 2004,2007,2010 Free Software Foundation, Inc.

# 

# This file is part of GNU Radio

# 

# GNU Radio is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 3, or (at your option)

# any later version.

# 

# GNU Radio is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

# 

# You should have received a copy of the GNU General Public License

# along with GNU Radio; see the file COPYING.  If not, write to

# the Free Software Foundation, Inc., 51 Franklin Street,

# Boston, MA 02110-1301, USA.

# 

from gnuradio import gr, gr_unittest

class test_head (gr_unittest.TestCase):

    def setUp (self):

        self.tb = gr.top_block ()

    def tearDown (self):

        self.tb = None

    def test_head (self):

        src_data = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)

        expected_result = (1, 2, 3, 4)

        src1 = gr.vector_source_i (src_data)

        op = gr.head (gr.sizeof_int, 4)

        dst1 = gr.vector_sink_i ()

        self.tb.connect (src1, op)

        self.tb.connect (op, dst1)

        self.tb.run ()

        dst_data = dst1.data ()

        self.assertEqual (expected_result, dst_data)

if __name__ == '__main__':

    gr_unittest.run(test_head, "test_head.xml")