stream(conditions.get(SearchRequestParams.AS_NQ))
                .of(stream -> stream.filter(q -> StringUtil.isNotBlank(q) && q.length() <= maxQueryLength).forEach(eq -> {
                    final String nq =
                            split(eq, " ").get(s -> s.filter(StringUtil::isNotBlank).map(q -> "NOT " + q).collect(Collectors.joining(" ")));
                    queryBuf.append(' ').append(nq);
                }));

        assertEquals("(aaa OR bbb)", getAsQuery("111", Collections.singletonMap(k, new String[] { "aaa bbb" })));
    }

    public void test_conditions_eq() {
        final String k = "nq";
        assertEquals("", getAsQuery(Collections.singletonMap(k, new String[] { "" })));
        assertEquals("NOT aaa", getAsQuery(Collections.singletonMap(k, new String[] { "aaa" })));