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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.math4.legacy.optim;
18  
19  import org.apache.commons.math4.legacy.exception.NotStrictlyPositiveException;
20  import org.junit.Test;
21  import org.junit.Assert;
22  
23  public class SimplePointCheckerTest {
24      @Test(expected=NotStrictlyPositiveException.class)
25      public void testIterationCheckPrecondition() {
26          new SimplePointChecker<>(1e-1, 1e-2, 0);
27      }
28  
29      @Test
30      public void testIterationCheck() {
31          final int max = 10;
32          final SimplePointChecker<PointValuePair> checker
33              = new SimplePointChecker<>(1e-1, 1e-2, max);
34          Assert.assertTrue(checker.converged(max, null, null));
35          Assert.assertTrue(checker.converged(max + 1, null, null));
36      }
37  
38      @Test
39      public void testIterationCheckDisabled() {
40          final SimplePointChecker<PointValuePair> checker
41              = new SimplePointChecker<>(1e-8, 1e-8);
42  
43          final PointValuePair a = new PointValuePair(new double[] { 1d }, 1d);
44          final PointValuePair b = new PointValuePair(new double[] { 10d }, 10d);
45  
46          Assert.assertFalse(checker.converged(-1, a, b));
47          Assert.assertFalse(checker.converged(0, a, b));
48          Assert.assertFalse(checker.converged(1000000, a, b));
49  
50          Assert.assertTrue(checker.converged(-1, a, a));
51          Assert.assertTrue(checker.converged(-1, b, b));
52      }
53  }