@Test
  public void testIncludes1() throws JSONException {
    int categoryId = 10;
    Query q = new Query().field("category_ids").includes(categoryId);
    ReadResponse resp = factual.fetch(TABLE, q);
    assertOk(resp);
    for (Map<String, Object> data : resp.getData()) {
      JSONArray categoryIds = (JSONArray) data.get("category_ids");
      boolean found = false;
      for (int i=0;i<categoryIds.length();i++) {
        if (categoryIds.getInt(i) == categoryId) {
          found = true;
          break;
        }
      }
      assertTrue(found);
    }
  }