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 harry.generators;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  public class SurjectionsTest
  {
      private static int RUNS = 1000000;
  
      @Test
      public void weightedTest()
      {
          int[] weights = new int[] {50, 40, 10};
  
          Surjections.Surjection<String> gen = Surjections.weighted(Surjections.weights(weights),
                                                                  "a", "b", "c");
  
          Map<String, Integer> frequencies = new HashMap<>();
          EntropySource rng = new PcgRSUFast(System.currentTimeMillis(), 0);
  
          for (int i = 0; i < RUNS; i++)
          {
              String s = gen.inflate(rng.next());
              frequencies.compute(s, (s1, i1) -> {
                  if (i1 == null)
                      return 1;
                  else
                      return i1 + 1;
              });
          }
  
          Assert.assertEquals(frequencies.get("a") / 10000, weights[0], 1);
          Assert.assertEquals(frequencies.get("b") / 10000, weights[1], 1);
          Assert.assertEquals(frequencies.get("c") / 10000, weights[2], 1);
      }
  
  
  }
  