11d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2010 The Guava Authors 31d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 41d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Licensed under the Apache License, Version 2.0 (the "License"); 51d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * you may not use this file except in compliance with the License. 61d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * You may obtain a copy of the License at 71d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 81d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * http://www.apache.org/licenses/LICENSE-2.0 91d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Unless required by applicable law or agreed to in writing, software 111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * distributed under the License is distributed on an "AS IS" BASIS, 121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * See the License for the specific language governing permissions and 141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * limitations under the License. 151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpackage com.google.common.collect; 181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.annotations.GwtCompatible; 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 210888a09821a98ac0680fad765217302858e70fa4Paul Duffinimport junit.framework.TestCase; 220888a09821a98ac0680fad765217302858e70fa4Paul Duffin 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.util.Iterator; 241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.util.ListIterator; 251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport java.util.NoSuchElementException; 261d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 271d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/** 281d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Tests for UnmodifiableListIterator. 291d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 301d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author Louis Wasserman 311d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 321d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert@GwtCompatible 331d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpublic class UnmodifiableListIteratorTest extends TestCase { 341d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testRemove() { 351d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Iterator<String> iterator = create(); 361d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 371d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(iterator.hasNext()); 381d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("a", iterator.next()); 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert try { 401d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert iterator.remove(); 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert fail(); 421d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } catch (UnsupportedOperationException expected) {} 431d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 441d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 451d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testAdd() { 461d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert ListIterator<String> iterator = create(); 471d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 481d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(iterator.hasNext()); 491d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("a", iterator.next()); 501d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("b", iterator.next()); 511d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("b", iterator.previous()); 521d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert try { 531d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert iterator.add("c"); 541d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert fail(); 551d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } catch (UnsupportedOperationException expected) {} 561d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 571d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 581d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testSet() { 591d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert ListIterator<String> iterator = create(); 601d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 611d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(iterator.hasNext()); 621d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("a", iterator.next()); 631d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("b", iterator.next()); 641d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals("b", iterator.previous()); 651d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert try { 661d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert iterator.set("c"); 671d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert fail(); 681d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } catch (UnsupportedOperationException expected) {} 691d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 701d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 711d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert UnmodifiableListIterator<String> create() { 721d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert final String[] array = {"a", "b", "c"}; 731d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 741d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return new UnmodifiableListIterator<String>() { 751d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert int i; 761d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 771d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public boolean hasNext() { 781d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return i < array.length; 791d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 801d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override 811d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public String next() { 821d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert if (!hasNext()) { 831d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert throw new NoSuchElementException(); 841d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 851d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return array[i++]; 861d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 871d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override public boolean hasPrevious() { 881d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return i > 0; 891d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 901d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override public int nextIndex() { 911d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return i; 921d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 931d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override public String previous() { 940888a09821a98ac0680fad765217302858e70fa4Paul Duffin if (!hasPrevious()) { 951d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert throw new NoSuchElementException(); 960888a09821a98ac0680fad765217302858e70fa4Paul Duffin } 971d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return array[--i]; 981d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 991d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @Override public int previousIndex() { 1001d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert return i-1; 1011d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1021d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert }; 1031d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 1041d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert} 105