old_contents: import click
  import pytest
  
  
  if click.__version__ >= '3.0':
      def test_legacy_callbacks(runner):
          def legacy_callback(ctx, value):
              return value.upper()
  
          @click.command()
          @click.option('--foo', callback=legacy_callback)
          def cli(foo):
              click.echo(foo)
  
          with pytest.warns(Warning, match='Invoked legacy parameter callback'):
              result = runner.invoke(cli, ['--foo', 'wat'])
              assert result.exit_code == 0
              assert 'WAT' in result.output
  
  
  def test_bash_func_name():
      from click._bashcomplete import get_completion_script
      script = get_completion_script('foo-bar baz_blah', '_COMPLETE_VAR').strip()
      assert script.startswith('_foo_barbaz_blah_completion()')
      assert '_COMPLETE_VAR=complete $1' in script
  
new_contents: import click
  import pytest
  
  
  if click.__version__ >= '3.0':
      def test_legacy_callbacks(runner):
          def legacy_callback(ctx, value):
              return value.upper()
  
          @click.command()
          @click.option('--foo', callback=legacy_callback)
          def cli(foo):
              click.echo(foo)
  
          with pytest.warns(Warning, match='Invoked legacy parameter callback'):
              result = runner.invoke(cli, ['--foo', 'wat'])
              assert result.exit_code == 0
              assert 'WAT' in result.output
  
  
  def test_bash_func_name():
      from click._bashcomplete import get_completion_script
      script = get_completion_script('foo-bar baz_blah', '_COMPLETE_VAR', 'bash').strip()
      assert script.startswith('_foo_barbaz_blah_completion()')
      assert '_COMPLETE_VAR=complete $1' in script
  
subject: Fix failing bash completion function test signature.