code: def test_argwhere():
      cond = tensor([[True, False], [False, True]], chunk_size=1)
      indices = argwhere(cond)
  
      assert np.isnan(indices.shape[0])
      assert indices.shape[1] == 2
  
      indices = tile(indices)
  
      assert indices.nsplits[1] == (1, 1)
  
imports: import numpy
  import pytest
  from ....core import tile
  from ....core.operand import OperandStage
  from ...datasource import ones, tensor, arange
  from ..None import transpose, broadcast_to, where, argwhere, array_split, split, squeeze, result_type, repeat, copyto, isin, moveaxis, TensorCopyTo, atleast_1d, atleast_2d, atleast_3d, ravel, searchsorted, unique, sort, partition, topk, to_gpu, to_cpu
label_desc: Use image node_id 8 for calling a global function with example usage: test_argwhere() without return types