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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.geometry.hull.euclidean.twod;
18  
19  import java.util.ArrayList;
20  import java.util.Collection;
21  
22  import org.apache.commons.geometry.core.precision.EpsilonDoublePrecisionContext;
23  import org.apache.commons.geometry.euclidean.twod.Vector2D;
24  import org.junit.Test;
25  
26  /**
27   * Test class for MonotoneChain.
28   */
29  public class MonotoneChainTest extends ConvexHullGenerator2DAbstractTest {
30  
31      @Override
32      protected ConvexHullGenerator2D createConvexHullGenerator(final boolean includeCollinearPoints) {
33          return new MonotoneChain(includeCollinearPoints, TEST_PRECISION);
34      }
35  
36      // ------------------------------------------------------------------------------
37  
38      @Test(expected = IllegalStateException.class)
39      public void testConvergenceException() {
40          // arrange
41          final Collection<Vector2D> points = new ArrayList<>();
42  
43          points.add(Vector2D.of(1, 1));
44          points.add(Vector2D.of(1, 5));
45          points.add(Vector2D.of(0, 7));
46          points.add(Vector2D.of(1, 10));
47          points.add(Vector2D.of(1, 20));
48          points.add(Vector2D.of(20, 20));
49          points.add(Vector2D.of(20, 40));
50          points.add(Vector2D.of(40, 1));
51  
52          // act/assert
53          new MonotoneChain(true, new EpsilonDoublePrecisionContext(1)).generate(points);
54      }
55  }