1 /*
2  * Copyright (C) 2008 The Guava Authors
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.google.common.collect;
18 
19 import com.google.common.annotations.GwtCompatible;
20 import java.util.Iterator;
21 import java.util.NoSuchElementException;
22 import junit.framework.TestCase;
23 
24 /**
25  * Tests for {@link UnmodifiableIterator}.
26  *
27  * @author Jared Levy
28  */
29 @GwtCompatible
30 public class UnmodifiableIteratorTest extends TestCase {
31 
testRemove()32   public void testRemove() {
33     final String[] array = {"a", "b", "c"};
34 
35     Iterator<String> iterator =
36         new UnmodifiableIterator<String>() {
37           int i;
38 
39           @Override
40           public boolean hasNext() {
41             return i < array.length;
42           }
43 
44           @Override
45           public String next() {
46             if (!hasNext()) {
47               throw new NoSuchElementException();
48             }
49             return array[i++];
50           }
51         };
52 
53     assertTrue(iterator.hasNext());
54     assertEquals("a", iterator.next());
55     try {
56       iterator.remove();
57       fail();
58     } catch (UnsupportedOperationException expected) {
59     }
60   }
61 }
62