def test_001_t (self):
        # set up fg
        src_data = (-3, 4, -5.5, 2, 3)
        expected_result = (9, 16, 30.2, 4, 9)
        src = blocks.vector_source_f(src_data)
        sqr = grconf.carre()
        dst = blocks.vector_sink_f()
        self.tb.connect(src, sqr)
        self.tb.connect(sqr, dst)
        self.tb.run()
        # check data
        result_data = dst.data()
        self.assertFloatTuplesAlmostEqual(expected_result, result_data, 6)