public void testToJsonString() {
        // Test toJsonString method
        String[] text = { "json", "test" };
        String[][] readings = { { "json" }, { "test" } };
        String[] tags = { "tag1" };

        SuggestItem item = new SuggestItem(text, readings, null, 0L, 10L, 1.0f, tags, null, null, SuggestItem.Kind.QUERY);

        String json = item.toJsonString();

        assertNotNull(json);