docstr: Tests outputing a graph to a file does not error out.
  
  There is no validation that the output graph is correct.
docstr_tok: ["Tests","outputing","a","graph","to","a","file","does","not","error","out",".","There","is","no","validation","that","the","output","graph","is","correct","."]
code: def test_output_graph(self):
      """Tests outputing a graph to a file does not error out.
  
      There is no validation that the output graph is correct.
      """
      output_path = self.create_tempdir()
      event_log_dirs = [
          "event_log_ant_eval00",
          "event_log_ant_eval01",
          "event_log_ant_eval02",
      ]
      event_log_paths = [
          os.path.join(TEST_DATA, log_dir) for log_dir in event_log_dirs
      ]
      stat_builder = graph_builder.StatsBuilder(
          event_log_paths,
          "AverageReturn",
          graph_agg=graph_builder.GraphAggTypes.MEDIAN,
          output_path=output_path.full_path,
      )
      data_collector, _ = stat_builder._gather_data()
      agg_results = stat_builder._align_and_aggregate(data_collector)
      stat_builder._output_graph(agg_results, len(event_log_dirs))
  
imports: import os
  from absl.testing import absltest
  import graph_builder
label_desc: Use image node_id 2 for calling the GraphBuilderTest obj's underlying member method code with example usage: obj.test_output_graph() without return types