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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.rng.sampling.distribution;
18  
19  import org.apache.commons.rng.RandomProviderState;
20  import org.apache.commons.rng.RestorableUniformRandomProvider;
21  import org.apache.commons.rng.simple.RandomSource;
22  import org.junit.Assert;
23  import org.junit.Test;
24  
25  /**
26   * This test checks the {@link SmallMeanPoissonSampler} can be created
27   * from a saved state.
28   */
29  public class SmallMeanPoissonSamplerTest {
30  
31      // Edge cases for construction
32  
33      /**
34       * Test the constructor with a bad mean.
35       */
36      @Test(expected=IllegalArgumentException.class)
37      public void testConstructorThrowsWithMeanLargerThanUpperBound() {
38          final RestorableUniformRandomProvider rng =
39              RandomSource.create(RandomSource.SPLIT_MIX_64);
40          @SuppressWarnings("unused")
41          SmallMeanPoissonSampler sampler = new SmallMeanPoissonSampler(rng, Integer.MAX_VALUE / 2 + 1);
42      }
43  
44      /**
45       * Test the constructor with a bad mean.
46       */
47      @Test(expected=IllegalArgumentException.class)
48      public void testConstructorThrowsWithZeroMean() {
49          final RestorableUniformRandomProvider rng =
50              RandomSource.create(RandomSource.SPLIT_MIX_64);
51          @SuppressWarnings("unused")
52          SmallMeanPoissonSampler sampler = new SmallMeanPoissonSampler(rng, 0);
53      }
54  }