code: def test_smart_array_concatenate_empty():
      with pytest.raises(
          ValueError, match="need at least one array to concatenate"
      ):
          smart_array_concatenate([])
  
file_path: stellargraph/tests/core/test_utils.py
imports: import pytest
  import numpy
  from stellargraph.core.utils import *
  from ..test_utils import flaky_xfail_mark
  from ..test_utils.graphs import example_graph_random
label_desc: Use image node_id 8 for calling a global function with example usage: test_smart_array_concatenate_empty() without return types