Function _expect_metric_exception

tests/test_exposition.py:468–476

(registry, expected_error)

def _expect_metric_exception(registry, expected_error):
    try:
        generate_latest(registry, openmetrics.ALLOWUTF8)
    except expected_error as exception:
        assert isinstance(exception.args[-1], core.Metric)
        # Got a valid error as expected, return quietly
        return

    raise RuntimeError('Expected exception not raised')


@pytest.mark.parametrize('MetricFamily', [