Source Code Cross Referenced for TestIteratorUtils.java in  » Library » Apache-common-Collections » org » apache » commons » collections » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Library » Apache common Collections » org.apache.commons.collections 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  Copyright 2001-2004 The Apache Software Foundation
003:         *
004:         *  Licensed under the Apache License, Version 2.0 (the "License");
005:         *  you may not use this file except in compliance with the License.
006:         *  You may obtain a copy of the License at
007:         *
008:         *      http://www.apache.org/licenses/LICENSE-2.0
009:         *
010:         *  Unless required by applicable law or agreed to in writing, software
011:         *  distributed under the License is distributed on an "AS IS" BASIS,
012:         *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013:         *  See the License for the specific language governing permissions and
014:         *  limitations under the License.
015:         */
016:        package org.apache.commons.collections;
017:
018:        import java.util.ArrayList;
019:        import java.util.Arrays;
020:        import java.util.Iterator;
021:        import java.util.List;
022:        import java.util.ListIterator;
023:        import java.util.NoSuchElementException;
024:
025:        import junit.framework.Test;
026:
027:        import org.apache.commons.collections.iterators.EmptyIterator;
028:        import org.apache.commons.collections.iterators.EmptyListIterator;
029:        import org.apache.commons.collections.iterators.EmptyMapIterator;
030:        import org.apache.commons.collections.iterators.EmptyOrderedIterator;
031:        import org.apache.commons.collections.iterators.EmptyOrderedMapIterator;
032:
033:        /**
034:         * Tests for IteratorUtils.
035:         * 
036:         * @version $Revision: 155406 $ $Date: 2005-02-26 12:55:26 +0000 (Sat, 26 Feb 2005) $
037:         * 
038:         * @author Unknown
039:         */
040:        public class TestIteratorUtils extends BulkTest {
041:
042:            public TestIteratorUtils(String name) {
043:                super (name);
044:            }
045:
046:            public static void main(String args[]) {
047:                junit.textui.TestRunner.run(suite());
048:            }
049:
050:            public static Test suite() {
051:                return BulkTest.makeSuite(TestIteratorUtils.class);
052:            }
053:
054:            public void testToList() {
055:                List list = new ArrayList();
056:                list.add(new Integer(1));
057:                list.add("Two");
058:                list.add(null);
059:                List result = IteratorUtils.toList(list.iterator());
060:                assertEquals(list, result);
061:            }
062:
063:            public void testToArray() {
064:                List list = new ArrayList();
065:                list.add(new Integer(1));
066:                list.add("Two");
067:                list.add(null);
068:                Object[] result = IteratorUtils.toArray(list.iterator());
069:                assertEquals(list, Arrays.asList(result));
070:            }
071:
072:            public void testToArray2() {
073:                List list = new ArrayList();
074:                list.add("One");
075:                list.add("Two");
076:                list.add(null);
077:                String[] result = (String[]) IteratorUtils.toArray(list
078:                        .iterator(), String.class);
079:                assertEquals(list, Arrays.asList(result));
080:            }
081:
082:            public void testArrayIterator() {
083:                Object[] objArray = { "a", "b", "c" };
084:                ResettableIterator iterator = IteratorUtils
085:                        .arrayIterator(objArray);
086:                assertTrue(iterator.next().equals("a"));
087:                assertTrue(iterator.next().equals("b"));
088:                iterator.reset();
089:                assertTrue(iterator.next().equals("a"));
090:
091:                try {
092:                    iterator = IteratorUtils.arrayIterator(new Integer(0));
093:                    fail("Expecting IllegalArgumentException");
094:                } catch (IllegalArgumentException ex) {
095:                    // expected
096:                }
097:
098:                try {
099:                    iterator = IteratorUtils.arrayIterator(null);
100:                    fail("Expecting NullPointerException");
101:                } catch (NullPointerException ex) {
102:                    // expected
103:                }
104:
105:                iterator = IteratorUtils.arrayIterator(objArray, 1);
106:                assertTrue(iterator.next().equals("b"));
107:
108:                try {
109:                    iterator = IteratorUtils.arrayIterator(objArray, -1);
110:                    fail("Expecting IndexOutOfBoundsException");
111:                } catch (IndexOutOfBoundsException ex) {
112:                    // expected
113:                }
114:
115:                iterator = IteratorUtils.arrayIterator(objArray, 3);
116:                assertTrue(!iterator.hasNext());
117:                iterator.reset();
118:
119:                try {
120:                    iterator = IteratorUtils.arrayIterator(objArray, 4);
121:                    fail("Expecting IndexOutOfBoundsException");
122:                } catch (IndexOutOfBoundsException ex) {
123:                    // expected
124:                }
125:
126:                iterator = IteratorUtils.arrayIterator(objArray, 2, 3);
127:                assertTrue(iterator.next().equals("c"));
128:
129:                try {
130:                    iterator = IteratorUtils.arrayIterator(objArray, 2, 4);
131:                    fail("Expecting IndexOutOfBoundsException");
132:                } catch (IndexOutOfBoundsException ex) {
133:                    // expected
134:                }
135:
136:                try {
137:                    iterator = IteratorUtils.arrayIterator(objArray, -1, 1);
138:                    fail("Expecting IndexOutOfBoundsException");
139:                } catch (IndexOutOfBoundsException ex) {
140:                    // expected
141:                }
142:
143:                try {
144:                    iterator = IteratorUtils.arrayIterator(objArray, 2, 1);
145:                    fail("Expecting IllegalArgumentException");
146:                } catch (IllegalArgumentException ex) {
147:                    // expected
148:                }
149:
150:                int[] intArray = { 0, 1, 2 };
151:                iterator = IteratorUtils.arrayIterator(intArray);
152:                assertTrue(iterator.next().equals(new Integer(0)));
153:                assertTrue(iterator.next().equals(new Integer(1)));
154:                iterator.reset();
155:                assertTrue(iterator.next().equals(new Integer(0)));
156:
157:                iterator = IteratorUtils.arrayIterator(intArray, 1);
158:                assertTrue(iterator.next().equals(new Integer(1)));
159:
160:                try {
161:                    iterator = IteratorUtils.arrayIterator(intArray, -1);
162:                    fail("Expecting IndexOutOfBoundsException");
163:                } catch (IndexOutOfBoundsException ex) {
164:                    // expected
165:                }
166:
167:                iterator = IteratorUtils.arrayIterator(intArray, 3);
168:                assertTrue(!iterator.hasNext());
169:                iterator.reset();
170:
171:                try {
172:                    iterator = IteratorUtils.arrayIterator(intArray, 4);
173:                    fail("Expecting IndexOutOfBoundsException");
174:                } catch (IndexOutOfBoundsException ex) {
175:                    // expected
176:                }
177:
178:                iterator = IteratorUtils.arrayIterator(intArray, 2, 3);
179:                assertTrue(iterator.next().equals(new Integer(2)));
180:
181:                try {
182:                    iterator = IteratorUtils.arrayIterator(intArray, 2, 4);
183:                    fail("Expecting IndexOutOfBoundsException");
184:                } catch (IndexOutOfBoundsException ex) {
185:                    // expected
186:                }
187:
188:                try {
189:                    iterator = IteratorUtils.arrayIterator(intArray, -1, 1);
190:                    fail("Expecting IndexOutOfBoundsException");
191:                } catch (IndexOutOfBoundsException ex) {
192:                    // expected
193:                }
194:
195:                try {
196:                    iterator = IteratorUtils.arrayIterator(intArray, 2, 1);
197:                    fail("Expecting IllegalArgumentException");
198:                } catch (IllegalArgumentException ex) {
199:                    // expected
200:                }
201:            }
202:
203:            public void testArrayListIterator() {
204:                Object[] objArray = { "a", "b", "c", "d" };
205:                ResettableListIterator iterator = IteratorUtils
206:                        .arrayListIterator(objArray);
207:                assertTrue(!iterator.hasPrevious());
208:                assertTrue(iterator.previousIndex() == -1);
209:                assertTrue(iterator.nextIndex() == 0);
210:                assertTrue(iterator.next().equals("a"));
211:                assertTrue(iterator.previous().equals("a"));
212:                assertTrue(iterator.next().equals("a"));
213:                assertTrue(iterator.previousIndex() == 0);
214:                assertTrue(iterator.nextIndex() == 1);
215:                assertTrue(iterator.next().equals("b"));
216:                assertTrue(iterator.next().equals("c"));
217:                assertTrue(iterator.next().equals("d"));
218:                assertTrue(iterator.nextIndex() == 4); // size of list
219:                assertTrue(iterator.previousIndex() == 3);
220:
221:                try {
222:                    iterator = IteratorUtils.arrayListIterator(new Integer(0));
223:                    fail("Expecting IllegalArgumentException");
224:                } catch (IllegalArgumentException ex) {
225:                    // expected
226:                }
227:
228:                try {
229:                    iterator = IteratorUtils.arrayListIterator(null);
230:                    fail("Expecting NullPointerException");
231:                } catch (NullPointerException ex) {
232:                    // expected
233:                }
234:
235:                iterator = IteratorUtils.arrayListIterator(objArray, 1);
236:                assertTrue(iterator.previousIndex() == -1);
237:                assertTrue(!iterator.hasPrevious());
238:                assertTrue(iterator.nextIndex() == 0);
239:                assertTrue(iterator.next().equals("b"));
240:                assertTrue(iterator.previousIndex() == 0);
241:
242:                try {
243:                    iterator = IteratorUtils.arrayListIterator(objArray, -1);
244:                    fail("Expecting IndexOutOfBoundsException.");
245:                } catch (IndexOutOfBoundsException ex) {
246:                    // expected
247:                }
248:
249:                iterator = IteratorUtils.arrayListIterator(objArray, 3);
250:                assertTrue(iterator.hasNext());
251:                try {
252:                    Object x = iterator.previous();
253:                    fail("Expecting NoSuchElementException.");
254:                } catch (NoSuchElementException ex) {
255:                    // expected
256:                }
257:
258:                try {
259:                    iterator = IteratorUtils.arrayListIterator(objArray, 5);
260:                    fail("Expecting IndexOutOfBoundsException.");
261:                } catch (IndexOutOfBoundsException ex) {
262:                    // expected
263:                }
264:
265:                iterator = IteratorUtils.arrayListIterator(objArray, 2, 3);
266:                assertTrue(iterator.next().equals("c"));
267:
268:                try {
269:                    iterator = IteratorUtils.arrayListIterator(objArray, 2, 5);
270:                    fail("Expecting IndexOutOfBoundsException");
271:                } catch (IndexOutOfBoundsException ex) {
272:                    // expected
273:                }
274:
275:                try {
276:                    iterator = IteratorUtils.arrayListIterator(objArray, -1, 1);
277:                    fail("Expecting IndexOutOfBoundsException");
278:                } catch (IndexOutOfBoundsException ex) {
279:                    // expected
280:                }
281:
282:                try {
283:                    iterator = IteratorUtils.arrayListIterator(objArray, 2, 1);
284:                    fail("Expecting IllegalArgumentException");
285:                } catch (IllegalArgumentException ex) {
286:                    // expected
287:                }
288:
289:                int[] intArray = { 0, 1, 2 };
290:                iterator = IteratorUtils.arrayListIterator(intArray);
291:                assertTrue(iterator.previousIndex() == -1);
292:                assertTrue(!iterator.hasPrevious());
293:                assertTrue(iterator.nextIndex() == 0);
294:                assertTrue(iterator.next().equals(new Integer(0)));
295:                assertTrue(iterator.previousIndex() == 0);
296:                assertTrue(iterator.nextIndex() == 1);
297:                assertTrue(iterator.next().equals(new Integer(1)));
298:                assertTrue(iterator.previousIndex() == 1);
299:                assertTrue(iterator.nextIndex() == 2);
300:                assertTrue(iterator.previous().equals(new Integer(1)));
301:                assertTrue(iterator.next().equals(new Integer(1)));
302:
303:                iterator = IteratorUtils.arrayListIterator(intArray, 1);
304:                assertTrue(iterator.previousIndex() == -1);
305:                assertTrue(!iterator.hasPrevious());
306:                assertTrue(iterator.nextIndex() == 0);
307:                assertTrue(iterator.next().equals(new Integer(1)));
308:                assertTrue(iterator.previous().equals(new Integer(1)));
309:                assertTrue(iterator.next().equals(new Integer(1)));
310:                assertTrue(iterator.previousIndex() == 0);
311:                assertTrue(iterator.nextIndex() == 1);
312:                assertTrue(iterator.next().equals(new Integer(2)));
313:                assertTrue(iterator.previousIndex() == 1);
314:                assertTrue(iterator.nextIndex() == 2);
315:                assertTrue(iterator.previous().equals(new Integer(2)));
316:                assertTrue(iterator.previousIndex() == 0);
317:                assertTrue(iterator.nextIndex() == 1);
318:
319:                try {
320:                    iterator = IteratorUtils.arrayListIterator(intArray, -1);
321:                    fail("Expecting IndexOutOfBoundsException");
322:                } catch (IndexOutOfBoundsException ex) {
323:                    // expected
324:                }
325:
326:                iterator = IteratorUtils.arrayListIterator(intArray, 3);
327:                assertTrue(!iterator.hasNext());
328:
329:                try {
330:                    iterator = IteratorUtils.arrayListIterator(intArray, 4);
331:                    fail("Expecting IndexOutOfBoundsException");
332:                } catch (IndexOutOfBoundsException ex) {
333:                    // expected
334:                }
335:
336:                iterator = IteratorUtils.arrayListIterator(intArray, 2, 3);
337:                assertTrue(!iterator.hasPrevious());
338:                assertTrue(iterator.previousIndex() == -1);
339:                assertTrue(iterator.next().equals(new Integer(2)));
340:                assertTrue(iterator.hasPrevious());
341:                assertTrue(!iterator.hasNext());
342:
343:                try {
344:                    iterator = IteratorUtils.arrayListIterator(intArray, 2, 4);
345:                    fail("Expecting IndexOutOfBoundsException");
346:                } catch (IndexOutOfBoundsException ex) {
347:                    // expected
348:                }
349:
350:                try {
351:                    iterator = IteratorUtils.arrayListIterator(intArray, -1, 1);
352:                    fail("Expecting IndexOutOfBoundsException");
353:                } catch (IndexOutOfBoundsException ex) {
354:                    // expected
355:                }
356:
357:                try {
358:                    iterator = IteratorUtils.arrayListIterator(intArray, 2, 1);
359:                    fail("Expecting IllegalArgumentException");
360:                } catch (IllegalArgumentException ex) {
361:                    // expected
362:                }
363:            }
364:
365:            /**
366:             * Gets an immutable Iterator operating on the elements ["a", "b", "c", "d"].
367:             */
368:            private Iterator getImmutableIterator() {
369:                List list = new ArrayList();
370:                list.add("a");
371:                list.add("b");
372:                list.add("c");
373:                list.add("d");
374:                return IteratorUtils.unmodifiableIterator(list.iterator());
375:            }
376:
377:            /**
378:             * Gets an immutable ListIterator operating on the elements ["a", "b", "c", "d"].
379:             */
380:            private ListIterator getImmutableListIterator() {
381:                List list = new ArrayList();
382:                list.add("a");
383:                list.add("b");
384:                list.add("c");
385:                list.add("d");
386:                return IteratorUtils.unmodifiableListIterator(list
387:                        .listIterator());
388:            }
389:
390:            //-----------------------------------------------------------------------
391:            /**
392:             * Test empty iterator
393:             */
394:            public void testEmptyIterator() {
395:                assertSame(EmptyIterator.INSTANCE, IteratorUtils.EMPTY_ITERATOR);
396:                assertSame(EmptyIterator.RESETTABLE_INSTANCE,
397:                        IteratorUtils.EMPTY_ITERATOR);
398:                assertEquals(true,
399:                        IteratorUtils.EMPTY_ITERATOR instanceof  Iterator);
400:                assertEquals(
401:                        true,
402:                        IteratorUtils.EMPTY_ITERATOR instanceof  ResettableIterator);
403:                assertEquals(false,
404:                        IteratorUtils.EMPTY_ITERATOR instanceof  OrderedIterator);
405:                assertEquals(false,
406:                        IteratorUtils.EMPTY_ITERATOR instanceof  ListIterator);
407:                assertEquals(false,
408:                        IteratorUtils.EMPTY_ITERATOR instanceof  MapIterator);
409:                assertEquals(false, IteratorUtils.EMPTY_ITERATOR.hasNext());
410:                IteratorUtils.EMPTY_ITERATOR.reset();
411:                assertSame(IteratorUtils.EMPTY_ITERATOR,
412:                        IteratorUtils.EMPTY_ITERATOR);
413:                assertSame(IteratorUtils.EMPTY_ITERATOR, IteratorUtils
414:                        .emptyIterator());
415:                try {
416:                    IteratorUtils.EMPTY_ITERATOR.next();
417:                    fail();
418:                } catch (NoSuchElementException ex) {
419:                }
420:                try {
421:                    IteratorUtils.EMPTY_ITERATOR.remove();
422:                    fail();
423:                } catch (IllegalStateException ex) {
424:                }
425:            }
426:
427:            //-----------------------------------------------------------------------
428:            /**
429:             * Test empty list iterator
430:             */
431:            public void testEmptyListIterator() {
432:                assertSame(EmptyListIterator.INSTANCE,
433:                        IteratorUtils.EMPTY_LIST_ITERATOR);
434:                assertSame(EmptyListIterator.RESETTABLE_INSTANCE,
435:                        IteratorUtils.EMPTY_LIST_ITERATOR);
436:                assertEquals(true,
437:                        IteratorUtils.EMPTY_LIST_ITERATOR instanceof  Iterator);
438:                assertEquals(
439:                        true,
440:                        IteratorUtils.EMPTY_LIST_ITERATOR instanceof  ListIterator);
441:                assertEquals(
442:                        true,
443:                        IteratorUtils.EMPTY_LIST_ITERATOR instanceof  ResettableIterator);
444:                assertEquals(
445:                        true,
446:                        IteratorUtils.EMPTY_LIST_ITERATOR instanceof  ResettableListIterator);
447:                assertEquals(
448:                        false,
449:                        IteratorUtils.EMPTY_LIST_ITERATOR instanceof  MapIterator);
450:                assertEquals(false, IteratorUtils.EMPTY_LIST_ITERATOR.hasNext());
451:                assertEquals(0, IteratorUtils.EMPTY_LIST_ITERATOR.nextIndex());
452:                assertEquals(-1, IteratorUtils.EMPTY_LIST_ITERATOR
453:                        .previousIndex());
454:                IteratorUtils.EMPTY_LIST_ITERATOR.reset();
455:                assertSame(IteratorUtils.EMPTY_LIST_ITERATOR,
456:                        IteratorUtils.EMPTY_LIST_ITERATOR);
457:                assertSame(IteratorUtils.EMPTY_LIST_ITERATOR, IteratorUtils
458:                        .emptyListIterator());
459:                try {
460:                    IteratorUtils.EMPTY_LIST_ITERATOR.next();
461:                    fail();
462:                } catch (NoSuchElementException ex) {
463:                }
464:                try {
465:                    IteratorUtils.EMPTY_LIST_ITERATOR.previous();
466:                    fail();
467:                } catch (NoSuchElementException ex) {
468:                }
469:                try {
470:                    IteratorUtils.EMPTY_LIST_ITERATOR.remove();
471:                    fail();
472:                } catch (IllegalStateException ex) {
473:                }
474:                try {
475:                    IteratorUtils.EMPTY_LIST_ITERATOR.set(null);
476:                    fail();
477:                } catch (IllegalStateException ex) {
478:                }
479:                try {
480:                    IteratorUtils.EMPTY_LIST_ITERATOR.add(null);
481:                    fail();
482:                } catch (UnsupportedOperationException ex) {
483:                }
484:            }
485:
486:            //-----------------------------------------------------------------------
487:            /**
488:             * Test empty map iterator
489:             */
490:            public void testEmptyMapIterator() {
491:                assertSame(EmptyMapIterator.INSTANCE,
492:                        IteratorUtils.EMPTY_MAP_ITERATOR);
493:                assertEquals(true,
494:                        IteratorUtils.EMPTY_MAP_ITERATOR instanceof  Iterator);
495:                assertEquals(true,
496:                        IteratorUtils.EMPTY_MAP_ITERATOR instanceof  MapIterator);
497:                assertEquals(
498:                        true,
499:                        IteratorUtils.EMPTY_MAP_ITERATOR instanceof  ResettableIterator);
500:                assertEquals(
501:                        false,
502:                        IteratorUtils.EMPTY_MAP_ITERATOR instanceof  ListIterator);
503:                assertEquals(
504:                        false,
505:                        IteratorUtils.EMPTY_MAP_ITERATOR instanceof  OrderedIterator);
506:                assertEquals(
507:                        false,
508:                        IteratorUtils.EMPTY_MAP_ITERATOR instanceof  OrderedMapIterator);
509:                assertEquals(false, IteratorUtils.EMPTY_MAP_ITERATOR.hasNext());
510:                ((ResettableIterator) IteratorUtils.EMPTY_MAP_ITERATOR).reset();
511:                assertSame(IteratorUtils.EMPTY_MAP_ITERATOR,
512:                        IteratorUtils.EMPTY_MAP_ITERATOR);
513:                assertSame(IteratorUtils.EMPTY_MAP_ITERATOR, IteratorUtils
514:                        .emptyMapIterator());
515:                try {
516:                    IteratorUtils.EMPTY_MAP_ITERATOR.next();
517:                    fail();
518:                } catch (NoSuchElementException ex) {
519:                }
520:                try {
521:                    IteratorUtils.EMPTY_MAP_ITERATOR.remove();
522:                    fail();
523:                } catch (IllegalStateException ex) {
524:                }
525:                try {
526:                    IteratorUtils.EMPTY_MAP_ITERATOR.getKey();
527:                    fail();
528:                } catch (IllegalStateException ex) {
529:                }
530:                try {
531:                    IteratorUtils.EMPTY_MAP_ITERATOR.getValue();
532:                    fail();
533:                } catch (IllegalStateException ex) {
534:                }
535:                try {
536:                    IteratorUtils.EMPTY_MAP_ITERATOR.setValue(null);
537:                    fail();
538:                } catch (IllegalStateException ex) {
539:                }
540:            }
541:
542:            //-----------------------------------------------------------------------
543:            /**
544:             * Test empty map iterator
545:             */
546:            public void testEmptyOrderedIterator() {
547:                assertSame(EmptyOrderedIterator.INSTANCE,
548:                        IteratorUtils.EMPTY_ORDERED_ITERATOR);
549:                assertEquals(
550:                        true,
551:                        IteratorUtils.EMPTY_ORDERED_ITERATOR instanceof  Iterator);
552:                assertEquals(
553:                        true,
554:                        IteratorUtils.EMPTY_ORDERED_ITERATOR instanceof  OrderedIterator);
555:                assertEquals(
556:                        true,
557:                        IteratorUtils.EMPTY_ORDERED_ITERATOR instanceof  ResettableIterator);
558:                assertEquals(
559:                        false,
560:                        IteratorUtils.EMPTY_ORDERED_ITERATOR instanceof  ListIterator);
561:                assertEquals(
562:                        false,
563:                        IteratorUtils.EMPTY_ORDERED_ITERATOR instanceof  MapIterator);
564:                assertEquals(false, IteratorUtils.EMPTY_ORDERED_ITERATOR
565:                        .hasNext());
566:                assertEquals(false, IteratorUtils.EMPTY_ORDERED_ITERATOR
567:                        .hasPrevious());
568:                ((ResettableIterator) IteratorUtils.EMPTY_ORDERED_ITERATOR)
569:                        .reset();
570:                assertSame(IteratorUtils.EMPTY_ORDERED_ITERATOR,
571:                        IteratorUtils.EMPTY_ORDERED_ITERATOR);
572:                assertSame(IteratorUtils.EMPTY_ORDERED_ITERATOR, IteratorUtils
573:                        .emptyOrderedIterator());
574:                try {
575:                    IteratorUtils.EMPTY_ORDERED_ITERATOR.next();
576:                    fail();
577:                } catch (NoSuchElementException ex) {
578:                }
579:                try {
580:                    IteratorUtils.EMPTY_ORDERED_ITERATOR.previous();
581:                    fail();
582:                } catch (NoSuchElementException ex) {
583:                }
584:                try {
585:                    IteratorUtils.EMPTY_ORDERED_ITERATOR.remove();
586:                    fail();
587:                } catch (IllegalStateException ex) {
588:                }
589:            }
590:
591:            //-----------------------------------------------------------------------
592:            /**
593:             * Test empty map iterator
594:             */
595:            public void testEmptyOrderedMapIterator() {
596:                assertSame(EmptyOrderedMapIterator.INSTANCE,
597:                        IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR);
598:                assertEquals(
599:                        true,
600:                        IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR instanceof  Iterator);
601:                assertEquals(
602:                        true,
603:                        IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR instanceof  MapIterator);
604:                assertEquals(
605:                        true,
606:                        IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR instanceof  OrderedMapIterator);
607:                assertEquals(
608:                        true,
609:                        IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR instanceof  ResettableIterator);
610:                assertEquals(
611:                        false,
612:                        IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR instanceof  ListIterator);
613:                assertEquals(false, IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR
614:                        .hasNext());
615:                assertEquals(false, IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR
616:                        .hasPrevious());
617:                ((ResettableIterator) IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR)
618:                        .reset();
619:                assertSame(IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR,
620:                        IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR);
621:                assertSame(IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR,
622:                        IteratorUtils.emptyOrderedMapIterator());
623:                try {
624:                    IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR.next();
625:                    fail();
626:                } catch (NoSuchElementException ex) {
627:                }
628:                try {
629:                    IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR.previous();
630:                    fail();
631:                } catch (NoSuchElementException ex) {
632:                }
633:                try {
634:                    IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR.remove();
635:                    fail();
636:                } catch (IllegalStateException ex) {
637:                }
638:                try {
639:                    IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR.getKey();
640:                    fail();
641:                } catch (IllegalStateException ex) {
642:                }
643:                try {
644:                    IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR.getValue();
645:                    fail();
646:                } catch (IllegalStateException ex) {
647:                }
648:                try {
649:                    IteratorUtils.EMPTY_ORDERED_MAP_ITERATOR.setValue(null);
650:                    fail();
651:                } catch (IllegalStateException ex) {
652:                }
653:            }
654:
655:            //-----------------------------------------------------------------------
656:            /**
657:             * Test next() and hasNext() for an immutable Iterator.
658:             */
659:            public void testUnmodifiableIteratorIteration() {
660:                Iterator iterator = getImmutableIterator();
661:
662:                assertTrue(iterator.hasNext());
663:
664:                assertEquals("a", iterator.next());
665:
666:                assertTrue(iterator.hasNext());
667:
668:                assertEquals("b", iterator.next());
669:
670:                assertTrue(iterator.hasNext());
671:
672:                assertEquals("c", iterator.next());
673:
674:                assertTrue(iterator.hasNext());
675:
676:                assertEquals("d", iterator.next());
677:
678:                assertTrue(!iterator.hasNext());
679:            }
680:
681:            /**
682:             * Test next(), hasNext(), previous() and hasPrevious() for an immutable
683:             * ListIterator.
684:             */
685:            public void testUnmodifiableListIteratorIteration() {
686:                ListIterator listIterator = getImmutableListIterator();
687:
688:                assertTrue(!listIterator.hasPrevious());
689:                assertTrue(listIterator.hasNext());
690:
691:                assertEquals("a", listIterator.next());
692:
693:                assertTrue(listIterator.hasPrevious());
694:                assertTrue(listIterator.hasNext());
695:
696:                assertEquals("b", listIterator.next());
697:
698:                assertTrue(listIterator.hasPrevious());
699:                assertTrue(listIterator.hasNext());
700:
701:                assertEquals("c", listIterator.next());
702:
703:                assertTrue(listIterator.hasPrevious());
704:                assertTrue(listIterator.hasNext());
705:
706:                assertEquals("d", listIterator.next());
707:
708:                assertTrue(listIterator.hasPrevious());
709:                assertTrue(!listIterator.hasNext());
710:
711:                assertEquals("d", listIterator.previous());
712:
713:                assertTrue(listIterator.hasPrevious());
714:                assertTrue(listIterator.hasNext());
715:
716:                assertEquals("c", listIterator.previous());
717:
718:                assertTrue(listIterator.hasPrevious());
719:                assertTrue(listIterator.hasNext());
720:
721:                assertEquals("b", listIterator.previous());
722:
723:                assertTrue(listIterator.hasPrevious());
724:                assertTrue(listIterator.hasNext());
725:
726:                assertEquals("a", listIterator.previous());
727:
728:                assertTrue(!listIterator.hasPrevious());
729:                assertTrue(listIterator.hasNext());
730:            }
731:
732:            /**
733:             * Test remove() for an immutable Iterator.
734:             */
735:            public void testUnmodifiableIteratorImmutability() {
736:                Iterator iterator = getImmutableIterator();
737:
738:                try {
739:                    iterator.remove();
740:                    // We shouldn't get to here.
741:                    fail("remove() should throw an UnsupportedOperationException");
742:                } catch (UnsupportedOperationException e) {
743:                    // This is correct; ignore the exception.
744:                }
745:
746:                iterator.next();
747:
748:                try {
749:                    iterator.remove();
750:                    // We shouldn't get to here.
751:                    fail("remove() should throw an UnsupportedOperationException");
752:                } catch (UnsupportedOperationException e) {
753:                    // This is correct; ignore the exception.
754:                }
755:
756:            }
757:
758:            /**
759:             * Test remove() for an immutable ListIterator.
760:             */
761:            public void testUnmodifiableListIteratorImmutability() {
762:                ListIterator listIterator = getImmutableListIterator();
763:
764:                try {
765:                    listIterator.remove();
766:                    // We shouldn't get to here.
767:                    fail("remove() should throw an UnsupportedOperationException");
768:                } catch (UnsupportedOperationException e) {
769:                    // This is correct; ignore the exception.
770:                }
771:
772:                try {
773:                    listIterator.set("a");
774:                    // We shouldn't get to here.
775:                    fail("set(Object) should throw an UnsupportedOperationException");
776:                } catch (UnsupportedOperationException e) {
777:                    // This is correct; ignore the exception.
778:                }
779:
780:                try {
781:                    listIterator.add("a");
782:                    // We shouldn't get to here.
783:                    fail("add(Object) should throw an UnsupportedOperationException");
784:                } catch (UnsupportedOperationException e) {
785:                    // This is correct; ignore the exception.
786:                }
787:
788:                listIterator.next();
789:
790:                try {
791:                    listIterator.remove();
792:                    // We shouldn't get to here.
793:                    fail("remove() should throw an UnsupportedOperationException");
794:                } catch (UnsupportedOperationException e) {
795:                    // This is correct; ignore the exception.
796:                }
797:
798:                try {
799:                    listIterator.set("a");
800:                    // We shouldn't get to here.
801:                    fail("set(Object) should throw an UnsupportedOperationException");
802:                } catch (UnsupportedOperationException e) {
803:                    // This is correct; ignore the exception.
804:                }
805:
806:                try {
807:                    listIterator.add("a");
808:                    // We shouldn't get to here.
809:                    fail("add(Object) should throw an UnsupportedOperationException");
810:                } catch (UnsupportedOperationException e) {
811:                    // This is correct; ignore the exception.
812:                }
813:            }
814:        }
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