def METHOD_NAME(self):
    x = 10*mpi.rank
    ans = list(range(0, 10*mpi.procs, 10))
    for root in range(mpi.procs):
        globalx = mpi.gather(x, root = root)
        if mpi.rank == root:
            self.check(globalx == ans)
        else:
            self.check(globalx == None)