}

    // Error path: overlaps may throw a CIFSException per signature
    @Test
    @DisplayName("overlaps throws CIFSException when implementation fails")
    void overlapsThrowsCifsException() throws Exception {
        when(locator.overlaps(any())).thenThrow(new CIFSException("Simulated failure"));

        CIFSException ex = assertThrows(CIFSException.class, () -> locator.overlaps(other));