def METHOD_NAME(path1, path2):
    with isolated_filesystem():
        merge_coolers("test.cool", [path1, path2], mergebuf=int(15e6))
        single = cooler.Cooler(path1)
        merged = cooler.Cooler("test.cool")
        assert (
            merged.pixels()["count"][:].sum() == 2 * single.pixels()["count"][:].sum()
        )