code: def test_dimension_mismatch_no_ellipsis(self) -> None:
      x = torch.randn((1, 2, 3))
      with self.assertRaises(ValueError):
          rearrange(x, "a b -> b a")
  
      with self.assertRaises(ValueError):
          rearrange(x, "a b c d -> c d b a")
  
file_path: pytorch/test/functorch/test_rearrange.py
imports: from typing import List, Tuple
  import numpy
  import torch
  from functorch.einops import rearrange
  from torch.testing._internal.common_utils import TestCase, run_tests
label_desc: Use image node_id 9 for calling the TestRearrange obj's underlying member method code with example usage: obj.test_dimension_mismatch_no_ellipsis() without return types