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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.commons.collections4.iterators;
19  
20  import java.util.Arrays;
21  import java.util.Iterator;
22  import java.util.NoSuchElementException;
23  
24  import org.junit.Test;
25  import static org.junit.Assert.*;
26  
27  /**
28   * Tests the IteratorEnumeration.
29   *
30   */
31  public class IteratorEnumerationTest {
32  
33      @Test
34      public void testEnumeration() {
35          final Iterator<String> iterator = Arrays.asList("a", "b", "c").iterator();
36          final IteratorEnumeration<String> enumeration = new IteratorEnumeration<>(iterator);
37  
38          assertEquals(iterator, enumeration.getIterator());
39  
40          assertTrue(enumeration.hasMoreElements());
41          assertEquals("a", enumeration.nextElement());
42          assertEquals("b", enumeration.nextElement());
43          assertEquals("c", enumeration.nextElement());
44          assertFalse(enumeration.hasMoreElements());
45  
46          try {
47              enumeration.nextElement();
48              fail("NoSuchElementException expected");
49          } catch (final NoSuchElementException e) {
50              // expected
51          }
52      }
53  }