return target.getClass().getSimpleName() + "[" + target.getMessage() + "]";
        }
        final StringBuilder sb = new StringBuilder();
        while (target != null) {
            sb.append(target.getClass().getSimpleName());
            if (target.getMessage() != null) {
                sb.append("[");
                sb.append(target.getMessage());
                sb.append("]");
            }

            // Some invalid queries might be handled gracefully
        } catch (InvalidQueryException e) {
            // This is expected for malformed queries
            assertNotNull(e.getMessage());
            assertTrue(e.getMessage().contains("Invalid query"));
        }
    }

    public void test_build_emptyQuery() {
        QueryContext context = queryHelper.build(SearchRequestType.SEARCH, "", ctx -> {

            createdStr = sdf.format(created);
        } else {
            createdStr = ComponentUtil.getMessageManager().getMessage(locale, "labels.search_unknown");
        }
        doc.put(CACHE_MSG, ComponentUtil.getMessageManager().getMessage(locale, "labels.search_cache_msg", url, createdStr));

        doc.put(QUERIES, queries);