code: def test_callback_input_scalar_grouping(scalar_grouping_size):
      if scalar_grouping_size[1] == 0:
          pytest.skip("Empty input grouping is not valid")
  
      check_callback_inputs_for_grouping(scalar_grouping_size[0])
  
imports: import dash
  from dash._grouping import make_grouping_by_index, grouping_len, flatten_grouping
  from dash._utils import create_callback_id
  from dash.dependencies import Input, State, Output, ClientsideFunction
  import mock
  import json
  import string
  import pytest
  from fixtures import scalar_grouping_size, list_grouping_size, dict_grouping_size, mixed_grouping_size
label_desc: Use image node_id 8 for calling a global function with example usage: test_callback_input_scalar_grouping(scalar_grouping_size) without return types