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   * 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
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   * KIND, either express or implied.  See the License for the
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  package org.apache.cassandra.metrics;
  
  import java.util.List;
  import java.util.concurrent.TimeoutException;
  
  import org.apache.cassandra.metrics.Sampler.Sample;
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  
  public class TopFrequencySamplerTest extends SamplerTest
  {
      @Before
      public void setSampler()
      {
          this.sampler = new FrequencySampler<String>()
          {
              public String toString(String value)
              {
                  return value;
              }
          };
      }
  
      @Test
      public void testSamplerSingleInsertionsEqualMulti() throws TimeoutException
      {
          sampler.beginSampling(10, 100000);
          insert(sampler);
          waitForEmpty(1000);
          List<Sample<String>> single = sampler.finishSampling(10);
  
          FrequencySampler<String> sampler2 = new FrequencySampler<String>()
          {
              public String toString(String value)
              {
                  return value;
              }
          };
          sampler2.beginSampling(10, 100000);
          for(int i = 1; i <= 10; i++)
          {
             String key = "item" + i;
             sampler2.addSample(key, i);
          }
          waitForEmpty(1000);
          Assert.assertEquals(countMap(single), countMap(sampler2.finishSampling(10)));
      }
  
  
  }
  