old_contents: import click
  from click.testing import CliRunner
  
  from pathvalidate.click import (
      sanitize_filename_arg,
      sanitize_filepath_arg,
      validate_filename_arg,
      validate_filepath_arg,
  )
  
  
  @click.command()
  @click.option("--filename", callback=validate_filename_arg)
  @click.option("--filepath", callback=validate_filepath_arg)
  def cli_validate(filename, filepath):
      if filename:
          click.echo(filename)
      if filepath:
          click.echo(filepath)
  
  
  @click.command()
  @click.option("--filename", callback=sanitize_filename_arg)
  @click.option("--filepath", callback=sanitize_filepath_arg)
  def cli_sanitize(filename, filepath):
      if filename:
          click.echo(filename)
      if filepath:
          click.echo(filepath)
  
  
  class Test_validate:
      def test_normal_filename(self):
          runner = CliRunner()
          result = runner.invoke(cli_validate, ["--filename", "a/b"])
          assert result.exit_code
  
      def test_normal_filepath(self):
          runner = CliRunner()
          result = runner.invoke(cli_validate, ["--filepath", "a/?b"])
          assert result.exit_code
  
  
  class Test_sanitize:
      def test_normal_filename(self):
          runner = CliRunner()
          result = runner.invoke(cli_sanitize, ["--filename", "a/b"])
          assert result.output.strip() == "ab"
  
      def test_normal_filepath(self):
          runner = CliRunner()
          result = runner.invoke(cli_sanitize, ["--filepath", "a/?b"])
          assert result.output.strip() == "a/b"
  
new_contents: import click
  import pytest
  from click.testing import CliRunner
  
  from pathvalidate.click import (
      sanitize_filename_arg,
      sanitize_filepath_arg,
      validate_filename_arg,
      validate_filepath_arg,
  )
  
  
  @click.command()
  @click.option("--filename", callback=validate_filename_arg)
  @click.option("--filepath", callback=validate_filepath_arg)
  def cli_validate(filename, filepath):
      if filename:
          click.echo(filename)
      if filepath:
          click.echo(filepath)
  
  
  @click.command()
  @click.option("--filename", callback=sanitize_filename_arg)
  @click.option("--filepath", callback=sanitize_filepath_arg)
  def cli_sanitize(filename, filepath):
      if filename:
          click.echo(filename)
      if filepath:
          click.echo(filepath)
  
  
  class Test_validate:
      @pytest.mark.parametrize(["value", "expected"], [["ab", 0], ["", 0], ["a/b", 2], ["a/?b", 2]])
      def test_normal_filename(self, value, expected):
          runner = CliRunner()
          result = runner.invoke(cli_validate, ["--filename", value])
          assert result.exit_code == expected
  
      @pytest.mark.parametrize(["value", "expected"], [["ab", 0], ["", 0], ["a/b", 0], ["a/?b", 2]])
      def test_normal_filepath(self, value, expected):
          runner = CliRunner()
          result = runner.invoke(cli_validate, ["--filepath", value])
          assert result.exit_code == expected
  
  
  class Test_sanitize:
      @pytest.mark.parametrize(
          ["value", "expected"], [["ab", "ab"], ["", ""], ["a/b", "ab"], ["a/?b", "ab"]]
      )
      def test_normal_filename(self, value, expected):
          runner = CliRunner()
          result = runner.invoke(cli_sanitize, ["--filename", value])
          assert result.output.strip() == expected
  
      @pytest.mark.parametrize(
          ["value", "expected"], [["ab", "ab"], ["", ""], ["a/b", "a/b"], ["a/?b", "a/b"]]
      )
      def test_normal_filepath(self, value, expected):
          runner = CliRunner()
          result = runner.invoke(cli_sanitize, ["--filepath", value])
          assert result.output.strip() == expected
  
subject: Add test cases