assertEquals("./test.log", AdminLogAction.sanitizeFilename("./test.log"));
        assertEquals(".hidden.log", AdminLogAction.sanitizeFilename(".hidden.log"));
    }

    @Test
    public void test_sanitizeFilename_preservesTripleDots() {
        // "..." has one ".." removed, leaving "."
        assertEquals(".", AdminLogAction.sanitizeFilename("..."));
        assertEquals("./test.log", AdminLogAction.sanitizeFilename(".../test.log"));