class_docstr: For tests that are not specific to any command.
class_docstr_tok: ["For","tests","that","are","not","specific","to","any","command","."]
code: def test_parse_args_empty(self):
      parser = cmd_line_parser.CmdLineParser()
      results, _ = parser.parse_line("")
      self.assertEqual(parsed_args_lib.CommandName.RUN_CMD, results.cmd)
      self.assertEqual(
          model_registry.ModelName.TEXT_MODEL, results.model_type
      )
      self.assertEqual([], results.inputs)
      self.assertEqual(
          model_lib.ModelArguments(),
          results.model_args,
      )
  
imports: from __future__ import annotations
  import sys
  from unittest import mock
  from absl.testing import absltest
  from google.generativeai.notebook import argument_parser
  from google.generativeai.notebook import cmd_line_parser
  from google.generativeai.notebook import model_registry
  from google.generativeai.notebook import parsed_args_lib
  from google.generativeai.notebook import post_process_utils
  from google.generativeai.notebook.lib import llm_function
  from google.generativeai.notebook.lib import llmfn_output_row
  from google.generativeai.notebook.lib import llmfn_outputs
  from google.generativeai.notebook.lib import model
label_desc: Use image node_id 2 for calling the CmdLineParserCommonTest obj's underlying member method code with example usage: obj.test_parse_args_empty() without return types