def METHOD_NAME(self):
    lenx = 64
    src0 = blocks.vector_source_f(list(range(0, lenx, 4)))
    src1 = blocks.vector_source_f(list(range(1, lenx, 4)))
    src2 = blocks.vector_source_f(list(range(2, lenx, 4)))
    src3 = blocks.vector_source_f(list(range(3, lenx, 4)))
    op = blocks.interleave(gr.sizeof_float)
    dst = blocks.vector_sink_f()
    self.tb.connect(src0, (op, 0))
    self.tb.connect(src1, (op, 1))
    self.tb.connect(src2, (op, 2))
    self.tb.connect(src3, (op, 3))
    self.tb.connect(op, dst)
    self.tb.run()
    expected_result = tuple(range(lenx))
    result_data = dst.data()
    self.assertFloatTuplesAlmostEqual(expected_result, result_data)