def METHOD_NAME(self):
    os.system(f'python -m pyserini.fusion --method rrf --runs ' +
              f'{self.tmp}/anserini.covid-r4.abstract.qq.bm25.txt ' +
              f'{self.tmp}/anserini.covid-r4.full-text.qq.bm25.txt ' +
              f'{self.tmp}/anserini.covid-r4.paragraph.qq.bm25.txt ' +
              f' --output {self.tmp}/anserini.covid-r4.fusion1.txt ' +
              f'--runtag reciprocal_rank_fusion_k=60 --k 100000')
    with open(f'{self.tmp}/anserini.covid-r4.fusion1.txt', 'rb') as f:
        md5 = hashlib.md5(f.read()).hexdigest()
    self.assertEqual('8ae9d1fca05bd1d9bfe7b24d1bdbe270', md5)
    os.system(f'python -m pyserini.fusion --method rrf --runs ' +
              f'{self.tmp}/anserini.covid-r4.abstract.qdel.bm25.txt ' +
              f'{self.tmp}/anserini.covid-r4.full-text.qdel.bm25.txt ' +
              f'{self.tmp}/anserini.covid-r4.paragraph.qdel.bm25.txt ' +
              f' --output {self.tmp}/anserini.covid-r4.fusion2.txt ' +
              f'--runtag reciprocal_rank_fusion_k=60 --k 100000')
    with open(f'{self.tmp}/anserini.covid-r4.fusion2.txt', 'rb') as f:
        md5 = hashlib.md5(f.read()).hexdigest()
    self.assertEqual('e1894209c815c96c6ddd4cacb578261a', md5)