code: def test_not_strongly_connected():
      """Tests for a tournament that is not strongly connected."""
      G = DiGraph([(0, 1), (0, 2), (1, 2)])
      assert not is_strongly_connected(G)
  
imports: from itertools import combinations
  import pytest
  from networkx import DiGraph
  from networkx.algorithms.tournament import hamiltonian_path, index_satisfying, is_reachable, is_strongly_connected, is_tournament, random_tournament, score_sequence, tournament_matrix
label_desc: Use image node_id 21 for calling a global function with example usage: test_not_strongly_connected() without return types