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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.collections4.iterators;
18  
19  import static org.junit.jupiter.api.Assertions.assertEquals;
20  import static org.junit.jupiter.api.Assertions.assertFalse;
21  import static org.junit.jupiter.api.Assertions.assertThrows;
22  import static org.junit.jupiter.api.Assertions.assertTrue;
23  
24  import java.util.Arrays;
25  import java.util.Iterator;
26  import java.util.NoSuchElementException;
27  
28  import org.junit.jupiter.api.Test;
29  
30  /**
31   * Tests the IteratorEnumeration.
32   */
33  public class IteratorEnumerationTest {
34  
35      @Test
36      public void testEnumeration() {
37          final Iterator<String> iterator = Arrays.asList("a", "b", "c").iterator();
38          final IteratorEnumeration<String> enumeration = new IteratorEnumeration<>(iterator);
39  
40          assertEquals(iterator, enumeration.getIterator());
41  
42          assertTrue(enumeration.hasMoreElements());
43          assertEquals("a", enumeration.nextElement());
44          assertEquals("b", enumeration.nextElement());
45          assertEquals("c", enumeration.nextElement());
46          assertFalse(enumeration.hasMoreElements());
47  
48          assertThrows(NoSuchElementException.class, () -> enumeration.nextElement());
49      }
50  
51  }