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 
21 import junit.framework.TestCase;
22 
23 import java.util.Iterator;
24 import java.util.NoSuchElementException;
25 
26 /**
27  * Tests for {@link UnmodifiableIterator}.
28  *
29  * @author Jared Levy
30  */
31 @GwtCompatible
32 public class UnmodifiableIteratorTest extends TestCase {
33 
34   public void testRemove() {
35     final String[] array = {"a", "b", "c"};
36 
37     Iterator<String> iterator = new UnmodifiableIterator<String>() {
38       int i;
39       @Override
40       public boolean hasNext() {
41         return i < array.length;
42       }
43       @Override
44       public String next() {
45         if (!hasNext()) {
46           throw new NoSuchElementException();
47         }
48         return array[i++];
49       }
50     };
51 
52     assertTrue(iterator.hasNext());
53     assertEquals("a", iterator.next());
54     try {
55       iterator.remove();
56       fail();
57     } catch (UnsupportedOperationException expected) {}
58   }
59 }
60