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 com.alibaba.metrics;
  
  import org.junit.Test;
  
  import static org.assertj.core.api.Assertions.assertThat;
  
  public class UniformReservoirTest {
      @Test
      @SuppressWarnings("unchecked")
      public void aReservoirOf100OutOf1000Elements() throws Exception {
          final UniformReservoir reservoir = new UniformReservoir(100);
          for (int i = 0; i < 1000; i++) {
              reservoir.update(i);
          }
  
          final Snapshot snapshot = reservoir.getSnapshot();
  
          assertThat(reservoir.size())
                  .isEqualTo(100);
  
          assertThat(snapshot.size())
                  .isEqualTo(100);
  
          for (double i : snapshot.getValues()) {
              assertThat(i)
                      .isLessThan(1000)
                      .isGreaterThanOrEqualTo(0);
          }
      }
  
  }
  