def METHOD_NAME(self):
    expected_result = self._vector
    src = blocks.file_source(gr.sizeof_float, self._datafilename)
    src.set_begin_tag(pmt.string_to_symbol("file_begin"))
    snk = blocks.vector_sink_f()
    self.tb.connect(src, snk)
    self.tb.run()
    result_data = snk.data()
    self.assertFloatTuplesAlmostEqual(expected_result, result_data)
    self.assertEqual(len(snk.tags()), 1)