def METHOD_NAME(self):
    #- if data,offsets are already good, just return them
    data = np.random.uniform((5,10))
    offsets = np.array([2,1,0,-1,-2])
    data2, offsets2 = desispec.resolution._sort_and_symmeterize(data, offsets)
    self.assertTrue(data is data2)
    self.assertTrue(offsets is offsets2)