code: def test_view_groups(self):
      self.assertEqual(
          view_groups([2, 3], [3, 2]),
          (
              Split(Flatten((InputDim(0), InputDim(1))), (3, 2), 0),
              Split(Flatten((InputDim(0), InputDim(1))), (3, 2), 1),
          ),
      )
      self.assertEqual(
          view_groups([3, 4, 5], [12, 5]),
          (Flatten((InputDim(0), InputDim(1))), InputDim(2)),
      )
      self.assertEqual(
          view_groups([2, 3, 4, 5, 7], [12, 70]),
          (
              Split(
                  Flatten(
                      (
                          InputDim(0),
                          InputDim(1),
                          InputDim(2),
                          InputDim(3),
                          InputDim(4),
                      )
                  ),
                  (12, 70),
                  0,
              ),
              Split(
                  Flatten(
                      (
                          InputDim(0),
                          InputDim(1),
                          InputDim(2),
                          InputDim(3),
                          InputDim(4),
                      )
                  ),
                  (12, 70),
                  1,
              ),
          ),
      )
      self.assertEqual(
          view_groups([2, 3, 4, 5, 7], [3, 8, 7, 5]),
          (
              Split(
                  Flatten((InputDim(0), InputDim(1), InputDim(2))),
                  (3, 8),
                  0,
              ),
              Split(
                  Flatten((InputDim(0), InputDim(1), InputDim(2))),
                  (3, 8),
                  1,
              ),
              Split(Flatten((InputDim(3), InputDim(4))), (7, 5), 0),
              Split(Flatten((InputDim(3), InputDim(4))), (7, 5), 1),
          ),
      )
      self.assertEqual(
          view_groups([3, 4, 8, 3], [12, 4, 2, 3]),
          (
              Flatten((InputDim(0), InputDim(1))),
              Split(InputDim(2), (4, 2), 0),
              Split(InputDim(2), (4, 2), 1),
              InputDim(3),
          ),
      )
      self.assertEqual(
          view_groups([3, 24], [1, 3, 2, 4, 1, 3, 1]),
          (
              Singleton(),
              InputDim(0),
              Split(InputDim(1), (2, 4, 3), 0),
              Split(InputDim(1), (2, 4, 3), 1),
              Singleton(),
              Split(InputDim(1), (2, 4, 3), 2),
              Singleton(),
          ),
      )
      self.assertEqual(
          view_groups([1, 1, 3, 2, 1, 1], [6, 1, 1, 1]),
          (
              Flatten((InputDim(2), InputDim(3))),
              Singleton(),
              Singleton(),
              Singleton(),
          ),
      )
      self.assertEqual(
          view_groups([1, 1, 12, 1, 1, 1, 2, 5, 1], [3, 4, 1, 10]),
          (
              Split(InputDim(2), (3, 4), 0),
              Split(InputDim(2), (3, 4), 1),
              Singleton(),
              Flatten((InputDim(6), InputDim(7))),
          ),
      )
      self.assertEqual(
          view_groups([2, 3, 4], [2, -1, 4]),
          (InputDim(0), InputDim(1), InputDim(2)),
      )
  
file_path: pytorch/test/distributed/_tensor/test_view_ops.py
imports: import itertools
  from typing import cast, List
  import torch
  import torch.distributed
  from torch import rand, randn, Tensor
  from torch.distributed._tensor import DeviceMesh, distribute_tensor, Replicate, Shard
  from torch.distributed._tensor.debug import CommDebugMode
  from torch.distributed._tensor.ops.view_ops import Broadcast, Flatten, InputDim, ops, Repeat, Singleton, Split, view_groups
  from torch.distributed._tensor.placement_types import Placement
  from torch.testing._internal.common_utils import run_tests
  from torch.testing._internal.distributed._tensor.common_dtensor import DTensorTestBase, with_comms
  from torch.utils import _pytree
label_desc: Use image node_id 1 for calling the TestViewOps obj's underlying member method code with example usage: obj.test_view_groups() without return types