qa_zeromq_pubsub.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2014 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
from gnuradio import blocks, zeromq
import pmt
import time

def make_tag(key, value, offset, srcid=None):
    tag = gr.tag_t()
    tag.key = pmt.string_to_symbol(key)
    tag.value = pmt.to_pmt(value)
    tag.offset = offset
    if srcid is not None:
        tag.srcid = pmt.to_pmt(srcid)
    return tag

def compare_tags(a, b):
    return a.offset == b.offset and pmt.equal(a.key, b.key) and \
           pmt.equal(a.value, b.value) and pmt.equal(a.srcid, b.srcid)

class qa_zeromq_pubsub (gr_unittest.TestCase):

    def setUp (self):
        self.send_tb = gr.top_block()
        self.recv_tb = gr.top_block()

    def tearDown (self):
        self.send_tb = None
        self.recv_tb = None

    def test_001 (self):
        vlen = 10
        src_data = list(range(vlen))*100
        src = blocks.vector_source_f(src_data, False, vlen)
        zeromq_pub_sink = zeromq.pub_sink(gr.sizeof_float, vlen, "tcp://127.0.0.1:0", 0)
        address = zeromq_pub_sink.last_endpoint()
        zeromq_sub_source = zeromq.sub_source(gr.sizeof_float, vlen, address, 0)
        sink = blocks.vector_sink_f(vlen)
        self.send_tb.connect(src, zeromq_pub_sink)
        self.recv_tb.connect(zeromq_sub_source, sink)
        self.recv_tb.start()
        time.sleep(0.5)
        self.send_tb.start()
        time.sleep(0.5)
        self.recv_tb.stop()
        self.send_tb.stop()
        self.recv_tb.wait()
        self.send_tb.wait()
        self.assertFloatTuplesAlmostEqual(sink.data(), src_data)

    def test_002 (self): 
        # same as test_001, but insert a tag and set key filter 
        vlen = 10
        src_data = list(range(vlen))*100

        src_tags = tuple([make_tag('key', 'val', 0, 'src'), make_tag('key', 'val', 1, 'src')])

        src = blocks.vector_source_f(src_data, False, vlen, tags=src_tags)
        zeromq_pub_sink = zeromq.pub_sink(gr.sizeof_float, vlen, "tcp://127.0.0.1:0", 0, pass_tags=True, key="filter_key")
        address = zeromq_pub_sink.last_endpoint()
        zeromq_sub_source = zeromq.sub_source(gr.sizeof_float, vlen, address, 0, pass_tags=True, key="filter_key")
        sink = blocks.vector_sink_f(vlen)
        self.send_tb.connect(src, zeromq_pub_sink)
        self.recv_tb.connect(zeromq_sub_source, sink)

        # start both flowgraphs
        self.recv_tb.start()
        time.sleep(0.5)
        self.send_tb.start()
        time.sleep(0.5)
        self.recv_tb.stop()
        self.send_tb.stop()
        self.recv_tb.wait()
        self.send_tb.wait()

        # compare data
        self.assertFloatTuplesAlmostEqual(sink.data(), src_data)

        # compare all tags
        rx_tags = sink.tags()
        self.assertEqual(len(src_tags), len(rx_tags))

        for in_tag, out_tag in zip(src_tags, rx_tags):
            self.assertTrue(compare_tags(in_tag, out_tag)) 

if __name__ == '__main__':
    gr_unittest.run(qa_zeromq_pubsub)