code: def test_bad_inputs(self):
      graph = one_node_graph()
      pytest.raises(
          nx.NetworkXError,
          nx.coloring.greedy_color,
          graph,
          strategy="invalid strategy",
      )
  
imports: import itertools
  import pytest
  import networkx
label_desc: Use image node_id 4 for calling the TestColoring obj's underlying member method code with example usage: obj.test_bad_inputs() without return types