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 @ElementTypesAreNonnullByDefault 31 public class UnmodifiableIteratorTest extends TestCase { 32 33 @SuppressWarnings("DoNotCall") testRemove()34 public void testRemove() { 35 final String[] array = {"a", "b", "c"}; 36 37 Iterator<String> iterator = 38 new UnmodifiableIterator<String>() { 39 int i; 40 41 @Override 42 public boolean hasNext() { 43 return i < array.length; 44 } 45 46 @Override 47 public String next() { 48 if (!hasNext()) { 49 throw new NoSuchElementException(); 50 } 51 return array[i++]; 52 } 53 }; 54 55 assertTrue(iterator.hasNext()); 56 assertEquals("a", iterator.next()); 57 try { 58 iterator.remove(); 59 fail(); 60 } catch (UnsupportedOperationException expected) { 61 } 62 } 63 } 64