/**
    * 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 storm.starter.bolt;
  
  import backtype.storm.Config;
  import backtype.storm.topology.BasicOutputCollector;
  import backtype.storm.topology.OutputFieldsDeclarer;
  import backtype.storm.tuple.Fields;
  import backtype.storm.tuple.Tuple;
  import backtype.storm.tuple.Values;
  import com.google.common.collect.Lists;
  import org.testng.annotations.DataProvider;
  import org.testng.annotations.Test;
  import storm.starter.tools.MockTupleHelpers;
  
  import java.util.Map;
  
  import static org.fest.assertions.api.Assertions.assertThat;
  import static org.mockito.Matchers.any;
  import static org.mockito.Mockito.*;
  
  public class IntermediateRankingsBoltTest {
  
    private static final String ANY_NON_SYSTEM_COMPONENT_ID = "irrelevant_component_id";
    private static final String ANY_NON_SYSTEM_STREAM_ID = "irrelevant_stream_id";
    private static final Object ANY_OBJECT = new Object();
    private static final int ANY_TOPN = 10;
    private static final long ANY_COUNT = 42;
  
    private Tuple mockRankableTuple(Object obj, long count) {
      Tuple tuple = MockTupleHelpers.mockTuple(ANY_NON_SYSTEM_COMPONENT_ID, ANY_NON_SYSTEM_STREAM_ID);
      when(tuple.getValues()).thenReturn(Lists.newArrayList(ANY_OBJECT, ANY_COUNT));
      return tuple;
    }
  
    @DataProvider
    public Object[][] illegalTopN() {
      return new Object[][]{ { -10 }, { -3 }, { -2 }, { -1 }, { 0 } };
    }
  
    @Test(expectedExceptions = IllegalArgumentException.class, dataProvider = "illegalTopN")
    public void negativeOrZeroTopNShouldThrowIAE(int topN) {
      new IntermediateRankingsBolt(topN);
    }
  
    @DataProvider
    public Object[][] illegalEmitFrequency() {
      return new Object[][]{ { -10 }, { -3 }, { -2 }, { -1 }, { 0 } };
    }
  
    @Test(expectedExceptions = IllegalArgumentException.class, dataProvider = "illegalEmitFrequency")
    public void negativeOrZeroEmitFrequencyShouldThrowIAE(int emitFrequencyInSeconds) {
      new IntermediateRankingsBolt(ANY_TOPN, emitFrequencyInSeconds);
    }
  
    @DataProvider
    public Object[][] legalTopN() {
      return new Object[][]{ { 1 }, { 2 }, { 3 }, { 20 } };
    }
  
    @Test(dataProvider = "legalTopN")
    public void positiveTopNShouldBeOk(int topN) {
      new IntermediateRankingsBolt(topN);
    }
  
    @DataProvider
    public Object[][] legalEmitFrequency() {
      return new Object[][]{ { 1 }, { 2 }, { 3 }, { 20 } };
    }
  
    @Test(dataProvider = "legalEmitFrequency")
    public void positiveEmitFrequencyShouldBeOk(int emitFrequencyInSeconds) {
      new IntermediateRankingsBolt(ANY_TOPN, emitFrequencyInSeconds);
    }
  
    @Test
    public void shouldEmitSomethingIfTickTupleIsReceived() {
      // given
      Tuple tickTuple = MockTupleHelpers.mockTickTuple();
      BasicOutputCollector collector = mock(BasicOutputCollector.class);
      IntermediateRankingsBolt bolt = new IntermediateRankingsBolt();
  
      // when
      bolt.execute(tickTuple, collector);
 
     // then
     // verifyZeroInteractions(collector);
     verify(collector).emit(any(Values.class));
   }
 
   @Test
   public void shouldEmitNothingIfNormalTupleIsReceived() {
     // given
     Tuple normalTuple = mockRankableTuple(ANY_OBJECT, ANY_COUNT);
     BasicOutputCollector collector = mock(BasicOutputCollector.class);
     IntermediateRankingsBolt bolt = new IntermediateRankingsBolt();
 
     // when
     bolt.execute(normalTuple, collector);
 
     // then
     verifyZeroInteractions(collector);
   }
 
   @Test
   public void shouldDeclareOutputFields() {
     // given
     OutputFieldsDeclarer declarer = mock(OutputFieldsDeclarer.class);
     IntermediateRankingsBolt bolt = new IntermediateRankingsBolt();
 
     // when
     bolt.declareOutputFields(declarer);
 
     // then
     verify(declarer, times(1)).declare(any(Fields.class));
   }
 
   @Test
   public void shouldSetTickTupleFrequencyInComponentConfigurationToNonZeroValue() {
     // given
     IntermediateRankingsBolt bolt = new IntermediateRankingsBolt();
 
     // when
     Map<String, Object> componentConfig = bolt.getComponentConfiguration();
 
     // then
     assertThat(componentConfig).containsKey(Config.TOPOLOGY_TICK_TUPLE_FREQ_SECS);
     Integer emitFrequencyInSeconds = (Integer) componentConfig.get(Config.TOPOLOGY_TICK_TUPLE_FREQ_SECS);
     assertThat(emitFrequencyInSeconds).isGreaterThan(0);
   }
 }