text: import pytest
  from click.testing import CliRunner
  from sealer import cli
  
  
  @pytest.fixture
  def runner():
      return CliRunner()
  
  
  # def test_cli(runner):
  #     result = runner.invoke(cli.main)
  #     assert result.exit_code == 0
  #     assert not result.exception
  #     assert result.output.strip() == 'Hello, world.'
  
  
  def test_cli_with_option(runner):
      result = runner.invoke(cli.main, ['--help'])
      assert not result.exception
      assert result.exit_code == 0
      assert result.output.split("\n")[0] == 'Usage: main [OPTIONS]'
  
  
  # def test_cli_with_arg(runner):
  #     result = runner.invoke(cli.main, ['Michael'])
  #     assert result.exit_code == 0
  #     assert not result.exception
  #     assert result.output.strip() == 'Hello, Michael.'
  