content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to you under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   * 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.
   */
  package org.apache.calcite.test;
  
  import org.apache.calcite.adapter.druid.DruidQuery;
  
  import java.util.List;
  import java.util.function.Consumer;
  
  import static org.hamcrest.CoreMatchers.containsString;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.hasSize;
  
  /**
   * A consumer that checks that a particular Druid query is generated to implement a query.
   */
  class DruidChecker implements Consumer<List> {
    private final String[] lines;
    private final boolean replaceSingleWithDoubleQuotes;
  
    DruidChecker(String... lines) {
      this(true, lines);
    }
  
    DruidChecker(boolean replaceSingleWithDoubleQuotes, String... lines) {
      this.replaceSingleWithDoubleQuotes = replaceSingleWithDoubleQuotes;
      this.lines = lines;
    }
  
    @Override public void accept(final List list) {
      assertThat((List<Object>) list, hasSize(1));
      DruidQuery.QuerySpec querySpec = (DruidQuery.QuerySpec) list.get(0);
      for (String line : lines) {
        final String s =
            replaceSingleWithDoubleQuotes ? line.replace('\'', '"') : line;
        assertThat(querySpec.getQueryString(null, -1), containsString(s));
      }
    }
  }
  