code: def testFormatTable(self):
      flags_dict = {
          labels.ENGINE_FLAG: "engine",
          labels.PIPELINE_DSL_PATH: "path_to_pipeline_dsl",
      }
      handler = FakeHandler(flags_dict)
      self.assertEqual(
          textwrap.dedent(
              """\
        +=====+=====+=======+
        | abc | d   | False |
        +=====+=====+=======+
        | 1   | 234 | None  |
        +-----+-----+-------+
        | xxx |     | []    |
        +=====+=====+=======+
        """
          ),
          handler._format_table(
              ("abc", "d", False), [[1, "234", None], ["xxx", "", []]]
          ),
      )
  
imports: import os
  import textwrap
  import tensorflow
  from tfx.dsl.io import fileio
  from tfx.tools.cli import labels
  from tfx.tools.cli.handler import base_handler
label_desc: Use image node_id 8 for calling the BaseHandlerTest obj's underlying member method code with example usage: obj.testFormatTable() without return types