assertEquals("_", ldapManager.replaceWithUnderscores("?"));
        assertEquals("_", ldapManager.replaceWithUnderscores("<"));
        assertEquals("_", ldapManager.replaceWithUnderscores(">"));

        assertEquals("_a_", ldapManager.replaceWithUnderscores("/a/"));
        assertEquals("___", ldapManager.replaceWithUnderscores("///"));
        assertEquals("a_a", ldapManager.replaceWithUnderscores("a/a"));
    }