import org.mockito.junit.jupiter.MockitoExtension;

@ExtendWith(MockitoExtension.class)
class WinErrorTest {

    // Helper to lookup a message by code using the production arrays
    private static Optional<String> lookupMessage(int code) {
        int[] codes = WinError.WINERR_CODES;
        String[] msgs = WinError.WINERR_MESSAGES;
        for (int i = 0; i < codes.length; i++) {
            if (codes[i] == code) {