return AppSettingsMock.wikiOnly().attachExecutors(() => {
   return basicExecutorFactory({
     datasets: {
       main: Dataset.fromJS(SMALL_WIKI_DATA)
     }
   });
 });

        return externalFactory(dataSource, druidRequester, timeout, introspectionStrategy).then((external) => {
          var executor = basicExecutorFactory({
            datasets: { main: external }
          });

          return dataSource.setAttributes(external.attributes).attachExecutor(executor);
        }).then(DataSource.updateMaxTime);

          .then((rawData) => {
            var dataset = Dataset.fromJS(rawData).hide();

            if (dataSource.subsetFilter) {
              dataset = dataset.filter(dataSource.subsetFilter.getFn(), {});
            }

            var executor = basicExecutorFactory({
              datasets: { main: dataset }
            });

            return dataSource.addAttributes(dataset.attributes).attachExecutor(executor);
          });

    this.appSettings = newSettings.attachExecutors((dataCube) => {
      if (dataCube.clusterName === 'native') {
        var fileManager = this.getFileManagerFor(dataCube.source);
        if (fileManager) {
          var dataset = fileManager.dataset;
          if (!dataset) return null;
          return basicExecutorFactory({
            datasets: { main: dataset }
          });
        }

      } else {
        var clusterManager = this.getClusterManagerFor(dataCube.clusterName);
        if (clusterManager) {
          var external = clusterManager.getExternalByName(dataCube.name);
          if (!external) return null;
          return basicExecutorFactory({
            datasets: { main: external }
          });
        }

      }
      return null;
    });

 this.appSettings = newSettings.attachExecutors((dataSource) => {
   if (dataSource.engine === 'native') {
     return null; // ToDo: fix this.
   } else {
     for (var clusterManager of clusterManagers) {
       if (clusterManager.cluster.name === dataSource.engine) {
         var external = clusterManager.getExternalByName(dataSource.name);
         if (!external) return null;
         return basicExecutorFactory({
           datasets: { main: external }
         });
       }
     }
   }
   return null;
 });

 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { $, Executor, Dataset, basicExecutorFactory } from 'plywood';
import { DataCube, DataCubeJS } from './data-cube';

var executor = basicExecutorFactory({
  datasets: {
    wiki: Dataset.fromJS([]),
    twitter: Dataset.fromJS([])
  }
});

export class DataCubeMock {
  public static get WIKI_JS(): DataCubeJS {
    return {
      name: 'wiki',
      title: 'Wiki',
      description: 'Wiki description',
      clusterName: 'druid',
      source: 'wiki',
      introspection: 'none',
      attributes: [
        { name: 'time', type: 'TIME' },
        { name: 'articleName', type: 'STRING' },