def METHOD_NAME():
    outfile = '/tmp/result.bg'
    args = "-b1 {} -b2 {} -o {} --operation add --skipNAs " \
           "--outFileFormat bedgraph".format(BIGWIG_A, BIGWIG_B, outfile).split()
    bwComp.main(args)
    _foo = open(outfile, 'r')
    resp = _foo.readlines()
    _foo.close()
    expected = ['3R\t100\t150\t2\n', '3R\t150\t200\t3\n']
    assert f"{resp}" == f"{expected}", f"{resp} != {expected}"
    unlink(outfile)