How to use the betelgeuse.cli function in Betelgeuse

def test_test_results_default_path(cli_runner):
    """Check if test results in the default path works."""
    with cli_runner.isolated_filesystem():
        with open('junit-results.xml', 'w') as handler:
            handler.write(JUNIT_XML)
        result = cli_runner.invoke(cli, ['test-results'])
        assert result.exit_code == 0
        assert 'Error: 1\n' in result.output
        assert 'Failure: 1\n' in result.output
        assert 'Passed: 4\n' in result.output
        assert 'Skipped: 1\n' in result.output

def test_test_results(cli_runner):
    """Check if test results command works."""
    with cli_runner.isolated_filesystem():
        with open('results.xml', 'w') as handler:
            handler.write(JUNIT_XML)
        result = cli_runner.invoke(
            cli, ['test-results', '--path', 'results.xml'])
        assert result.exit_code == 0
        assert 'Error: 1\n' in result.output
        assert 'Failure: 1\n' in result.output
        assert 'Passed: 4\n' in result.output
        assert 'Skipped: 1\n' in result.output