def freeze(h, output_yaml, resolve, groups):
    """Output installed packages."""
    if not groups:
        groups = filter(lambda group: not group.lower().startswith("bower"),
                        h.requirements.keys())
    else:
        groups = [text_type.strip(group) for group in groups.split(",")]

    if output_yaml:
        for requirements in h.requirements.values():
            for requirement in requirements:
                if resolve and not requirement.version:
                    requirement.load_installed_version()
        click.echo(h.requirements.yaml)
    else:
        for group in groups:
            if not h.requirements[group]:
                continue
            click.echo("# {}".format(group))
            for requirement in h.requirements[group]:
                if resolve and not requirement.version:
                    requirement.load_installed_version()
                click.echo(str(requirement))
def test_when_verbose_and_retcode_is_nonzero_output_should_be_had():
    expected_stderr = "this is something fnord"
    with patch.dict(
        pdbedit.__salt__,
        {
            "cmd.run_all": MagicMock(
                return_value={"stdout": "", "stderr": expected_stderr, "retcode": 1}
            )
        },
    ), patch("salt.modules.pdbedit.log.error", autospec=True) as fake_error_log:
        pdbedit.list_users(verbose=True)
        actual_error = fake_error_log.mock_calls[0].args[0]
        assert actual_error == expected_stderr