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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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|
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public class LinkedListTest extends TestCase { |
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|
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private static final int N = 10; |
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private static final long SHORT_DELAY_MS = 100; |
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private static final long MEDIUM_DELAY_MS = 1000; |
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private static final long LONG_DELAY_MS = 10000; |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Iterator; |
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import java.util.LinkedList; |
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import java.util.List; |
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import java.util.NoSuchElementException; |
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import java.util.concurrent.ThreadLocalRandom; |
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|
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import junit.framework.Test; |
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|
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public class LinkedListTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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main(suite(), args); |
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} |
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|
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public static Test suite() { |
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return new TestSuite(LinkedListTest.class); |
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class Implementation implements CollectionImplementation { |
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public Class<?> klazz() { return LinkedList.class; } |
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public List emptyCollection() { return new LinkedList(); } |
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public Object makeElement(int i) { return i; } |
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public boolean isConcurrent() { return false; } |
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public boolean permitsNulls() { return true; } |
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} |
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class SubListImplementation extends Implementation { |
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public List emptyCollection() { |
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List list = super.emptyCollection(); |
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ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
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if (rnd.nextBoolean()) |
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list.add(makeElement(rnd.nextInt())); |
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int i = rnd.nextInt(list.size() + 1); |
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return list.subList(i, i); |
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} |
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} |
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return newTestSuite( |
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LinkedListTest.class, |
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CollectionTest.testSuite(new Implementation()), |
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CollectionTest.testSuite(new SubListImplementation())); |
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} |
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|
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/** |
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* Create a queue of given size containing consecutive |
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* Integers 0 ... n. |
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* Returns a new queue of given size containing consecutive |
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* Integers 0 ... n - 1. |
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*/ |
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private LinkedList fullQueue(int n) { |
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LinkedList q = new LinkedList(); |
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private static LinkedList<Integer> populatedQueue(int n) { |
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LinkedList<Integer> q = new LinkedList<>(); |
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assertTrue(q.isEmpty()); |
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for(int i = 0; i < n; ++i) |
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assertTrue(q.offer(new Integer(i))); |
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for (int i = 0; i < n; ++i) |
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assertTrue(q.offer(new Integer(i))); |
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assertFalse(q.isEmpty()); |
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assertEquals(n, q.size()); |
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assertEquals(n, q.size()); |
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assertEquals((Integer) 0, q.peekFirst()); |
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assertEquals((Integer) (n - 1), q.peekLast()); |
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return q; |
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} |
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|
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public void testConstructor1(){ |
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|
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/** |
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* new queue is empty |
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*/ |
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public void testConstructor1() { |
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assertEquals(0, new LinkedList().size()); |
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} |
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|
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/** |
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* Initializing from null Collection throws NPE |
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*/ |
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public void testConstructor3() { |
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try { |
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LinkedList q = new LinkedList((Collection)null); |
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fail("Cannot make from null collection"); |
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} |
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catch (NullPointerException success) {} |
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new LinkedList((Collection)null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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public void testConstructor6(){ |
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try { |
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Integer[] ints = new Integer[N]; |
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for (int i = 0; i < N; ++i) |
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ints[i] = new Integer(i); |
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LinkedList q = new LinkedList(Arrays.asList(ints)); |
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for (int i = 0; i < N; ++i) |
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assertEquals(ints[i], q.poll()); |
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} |
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finally {} |
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/** |
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* Queue contains all elements of collection used to initialize |
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*/ |
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public void testConstructor6() { |
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Integer[] ints = new Integer[SIZE]; |
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for (int i = 0; i < SIZE; ++i) |
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ints[i] = i; |
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LinkedList q = new LinkedList(Arrays.asList(ints)); |
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for (int i = 0; i < SIZE; ++i) |
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assertEquals(ints[i], q.poll()); |
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} |
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|
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/** |
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* isEmpty is true before add, false after |
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*/ |
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public void testEmpty() { |
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LinkedList q = new LinkedList(); |
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assertTrue(q.isEmpty()); |
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assertTrue(q.isEmpty()); |
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} |
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|
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/** |
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* size changes when elements added and removed |
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*/ |
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public void testSize() { |
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LinkedList q = fullQueue(N); |
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for (int i = 0; i < N; ++i) { |
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assertEquals(N-i, q.size()); |
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LinkedList q = populatedQueue(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(SIZE - i, q.size()); |
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q.remove(); |
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} |
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for (int i = 0; i < N; ++i) { |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.size()); |
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q.add(new Integer(i)); |
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} |
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} |
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|
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public void testOfferNull(){ |
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try { |
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LinkedList q = new LinkedList(); |
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q.offer(null); |
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} catch (NullPointerException ie) { |
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fail("should not throw NPE"); |
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} |
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/** |
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* offer(null) succeeds |
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*/ |
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public void testOfferNull() { |
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LinkedList q = new LinkedList(); |
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q.offer(null); |
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assertNull(q.get(0)); |
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assertTrue(q.contains(null)); |
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} |
131 |
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|
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/** |
133 |
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* Offer succeeds |
134 |
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*/ |
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public void testOffer() { |
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LinkedList q = new LinkedList(); |
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assertTrue(q.offer(new Integer(0))); |
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assertTrue(q.offer(new Integer(1))); |
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} |
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|
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public void testAdd(){ |
141 |
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/** |
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* add succeeds |
143 |
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*/ |
144 |
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public void testAdd() { |
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LinkedList q = new LinkedList(); |
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for (int i = 0; i < N; ++i) { |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.size()); |
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assertTrue(q.add(new Integer(i))); |
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} |
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} |
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|
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public void testAddAll1(){ |
152 |
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/** |
153 |
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* addAll(null) throws NPE |
154 |
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*/ |
155 |
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public void testAddAll1() { |
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LinkedList q = new LinkedList(); |
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try { |
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LinkedList q = new LinkedList(); |
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q.addAll(null); |
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fail("Cannot add null collection"); |
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} |
161 |
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catch (NullPointerException success) {} |
159 |
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shouldThrow(); |
160 |
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} catch (NullPointerException success) {} |
161 |
> |
} |
162 |
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|
163 |
> |
/** |
164 |
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* Queue contains all elements, in traversal order, of successful addAll |
165 |
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*/ |
166 |
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public void testAddAll5() { |
167 |
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Integer[] empty = new Integer[0]; |
168 |
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Integer[] ints = new Integer[SIZE]; |
169 |
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for (int i = 0; i < SIZE; ++i) |
170 |
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ints[i] = i; |
171 |
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LinkedList q = new LinkedList(); |
172 |
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assertFalse(q.addAll(Arrays.asList(empty))); |
173 |
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assertTrue(q.addAll(Arrays.asList(ints))); |
174 |
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for (int i = 0; i < SIZE; ++i) |
175 |
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assertEquals(ints[i], q.poll()); |
176 |
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} |
177 |
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|
178 |
> |
/** |
179 |
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* addAll with too large an index throws IOOBE |
180 |
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*/ |
181 |
> |
public void testAddAll2_IndexOutOfBoundsException() { |
182 |
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LinkedList l = new LinkedList(); |
183 |
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l.add(new Object()); |
184 |
> |
LinkedList m = new LinkedList(); |
185 |
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m.add(new Object()); |
186 |
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try { |
187 |
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l.addAll(4,m); |
188 |
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shouldThrow(); |
189 |
> |
} catch (IndexOutOfBoundsException success) {} |
190 |
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} |
191 |
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|
192 |
< |
public void testAddAll5(){ |
192 |
> |
/** |
193 |
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* addAll with negative index throws IOOBE |
194 |
> |
*/ |
195 |
> |
public void testAddAll4_BadIndex() { |
196 |
> |
LinkedList l = new LinkedList(); |
197 |
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l.add(new Object()); |
198 |
> |
LinkedList m = new LinkedList(); |
199 |
> |
m.add(new Object()); |
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try { |
201 |
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Integer[] empty = new Integer[0]; |
202 |
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Integer[] ints = new Integer[N]; |
203 |
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for (int i = 0; i < N; ++i) |
125 |
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ints[i] = new Integer(i); |
126 |
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LinkedList q = new LinkedList(); |
127 |
< |
assertFalse(q.addAll(Arrays.asList(empty))); |
128 |
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assertTrue(q.addAll(Arrays.asList(ints))); |
129 |
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for (int i = 0; i < N; ++i) |
130 |
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assertEquals(ints[i], q.poll()); |
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} |
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finally {} |
201 |
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l.addAll(-1,m); |
202 |
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shouldThrow(); |
203 |
> |
} catch (IndexOutOfBoundsException success) {} |
204 |
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} |
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|
206 |
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public void testPoll(){ |
207 |
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LinkedList q = fullQueue(N); |
208 |
< |
for (int i = 0; i < N; ++i) { |
209 |
< |
assertEquals(i, ((Integer)q.poll()).intValue()); |
206 |
> |
/** |
207 |
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* poll succeeds unless empty |
208 |
> |
*/ |
209 |
> |
public void testPoll() { |
210 |
> |
LinkedList q = populatedQueue(SIZE); |
211 |
> |
for (int i = 0; i < SIZE; ++i) { |
212 |
> |
assertEquals(i, q.poll()); |
213 |
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} |
214 |
< |
assertNull(q.poll()); |
214 |
> |
assertNull(q.poll()); |
215 |
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} |
216 |
|
|
217 |
< |
public void testPeek(){ |
218 |
< |
LinkedList q = fullQueue(N); |
219 |
< |
for (int i = 0; i < N; ++i) { |
220 |
< |
assertEquals(i, ((Integer)q.peek()).intValue()); |
221 |
< |
q.poll(); |
217 |
> |
/** |
218 |
> |
* peek returns next element, or null if empty |
219 |
> |
*/ |
220 |
> |
public void testPeek() { |
221 |
> |
LinkedList q = populatedQueue(SIZE); |
222 |
> |
for (int i = 0; i < SIZE; ++i) { |
223 |
> |
assertEquals(i, q.peek()); |
224 |
> |
assertEquals(i, q.poll()); |
225 |
|
assertTrue(q.peek() == null || |
226 |
< |
i != ((Integer)q.peek()).intValue()); |
226 |
> |
!q.peek().equals(i)); |
227 |
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} |
228 |
< |
assertNull(q.peek()); |
228 |
> |
assertNull(q.peek()); |
229 |
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} |
230 |
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|
231 |
< |
public void testElement(){ |
232 |
< |
LinkedList q = fullQueue(N); |
233 |
< |
for (int i = 0; i < N; ++i) { |
234 |
< |
assertEquals(i, ((Integer)q.element()).intValue()); |
235 |
< |
q.poll(); |
231 |
> |
/** |
232 |
> |
* element returns next element, or throws NSEE if empty |
233 |
> |
*/ |
234 |
> |
public void testElement() { |
235 |
> |
LinkedList q = populatedQueue(SIZE); |
236 |
> |
for (int i = 0; i < SIZE; ++i) { |
237 |
> |
assertEquals(i, q.element()); |
238 |
> |
assertEquals(i, q.poll()); |
239 |
|
} |
240 |
|
try { |
241 |
|
q.element(); |
242 |
< |
fail("no such element"); |
243 |
< |
} |
164 |
< |
catch (NoSuchElementException success) {} |
242 |
> |
shouldThrow(); |
243 |
> |
} catch (NoSuchElementException success) {} |
244 |
|
} |
245 |
|
|
246 |
< |
public void testRemove(){ |
247 |
< |
LinkedList q = fullQueue(N); |
248 |
< |
for (int i = 0; i < N; ++i) { |
249 |
< |
assertEquals(i, ((Integer)q.remove()).intValue()); |
246 |
> |
/** |
247 |
> |
* remove removes next element, or throws NSEE if empty |
248 |
> |
*/ |
249 |
> |
public void testRemove() { |
250 |
> |
LinkedList q = populatedQueue(SIZE); |
251 |
> |
for (int i = 0; i < SIZE; ++i) { |
252 |
> |
assertEquals(i, q.remove()); |
253 |
|
} |
254 |
|
try { |
255 |
|
q.remove(); |
256 |
< |
fail("remove should throw"); |
257 |
< |
} catch (NoSuchElementException success){ |
176 |
< |
} |
256 |
> |
shouldThrow(); |
257 |
> |
} catch (NoSuchElementException success) {} |
258 |
|
} |
259 |
|
|
260 |
< |
public void testRemoveElement(){ |
261 |
< |
LinkedList q = fullQueue(N); |
262 |
< |
for (int i = 1; i < N; i+=2) { |
263 |
< |
assertTrue(q.remove(new Integer(i))); |
264 |
< |
} |
265 |
< |
for (int i = 0; i < N; i+=2) { |
266 |
< |
assertTrue(q.remove(new Integer(i))); |
267 |
< |
assertFalse(q.remove(new Integer(i+1))); |
260 |
> |
/** |
261 |
> |
* remove(x) removes x and returns true if present |
262 |
> |
*/ |
263 |
> |
public void testRemoveElement() { |
264 |
> |
LinkedList q = populatedQueue(SIZE); |
265 |
> |
for (int i = 1; i < SIZE; i += 2) { |
266 |
> |
assertTrue(q.contains(i)); |
267 |
> |
assertTrue(q.remove((Integer)i)); |
268 |
> |
assertFalse(q.contains(i)); |
269 |
> |
assertTrue(q.contains(i - 1)); |
270 |
> |
} |
271 |
> |
for (int i = 0; i < SIZE; i += 2) { |
272 |
> |
assertTrue(q.contains(i)); |
273 |
> |
assertTrue(q.remove((Integer)i)); |
274 |
> |
assertFalse(q.contains(i)); |
275 |
> |
assertFalse(q.remove((Integer)(i + 1))); |
276 |
> |
assertFalse(q.contains(i + 1)); |
277 |
|
} |
278 |
|
assertTrue(q.isEmpty()); |
279 |
|
} |
280 |
< |
|
281 |
< |
public void testContains(){ |
282 |
< |
LinkedList q = fullQueue(N); |
283 |
< |
for (int i = 0; i < N; ++i) { |
280 |
> |
|
281 |
> |
/** |
282 |
> |
* contains(x) reports true when elements added but not yet removed |
283 |
> |
*/ |
284 |
> |
public void testContains() { |
285 |
> |
LinkedList q = populatedQueue(SIZE); |
286 |
> |
for (int i = 0; i < SIZE; ++i) { |
287 |
|
assertTrue(q.contains(new Integer(i))); |
288 |
|
q.poll(); |
289 |
|
assertFalse(q.contains(new Integer(i))); |
290 |
|
} |
291 |
|
} |
292 |
|
|
293 |
< |
public void testClear(){ |
294 |
< |
LinkedList q = fullQueue(N); |
293 |
> |
/** |
294 |
> |
* clear removes all elements |
295 |
> |
*/ |
296 |
> |
public void testClear() { |
297 |
> |
LinkedList q = populatedQueue(SIZE); |
298 |
|
q.clear(); |
299 |
|
assertTrue(q.isEmpty()); |
300 |
|
assertEquals(0, q.size()); |
301 |
< |
q.add(new Integer(1)); |
301 |
> |
assertTrue(q.add(new Integer(1))); |
302 |
|
assertFalse(q.isEmpty()); |
303 |
|
q.clear(); |
304 |
|
assertTrue(q.isEmpty()); |
305 |
|
} |
306 |
|
|
307 |
< |
public void testContainsAll(){ |
308 |
< |
LinkedList q = fullQueue(N); |
307 |
> |
/** |
308 |
> |
* containsAll(c) is true when c contains a subset of elements |
309 |
> |
*/ |
310 |
> |
public void testContainsAll() { |
311 |
> |
LinkedList q = populatedQueue(SIZE); |
312 |
|
LinkedList p = new LinkedList(); |
313 |
< |
for (int i = 0; i < N; ++i) { |
313 |
> |
for (int i = 0; i < SIZE; ++i) { |
314 |
|
assertTrue(q.containsAll(p)); |
315 |
|
assertFalse(p.containsAll(q)); |
316 |
< |
p.add(new Integer(i)); |
316 |
> |
assertTrue(p.add(new Integer(i))); |
317 |
|
} |
318 |
|
assertTrue(p.containsAll(q)); |
319 |
|
} |
320 |
|
|
321 |
< |
public void testRetainAll(){ |
322 |
< |
LinkedList q = fullQueue(N); |
323 |
< |
LinkedList p = fullQueue(N); |
324 |
< |
for (int i = 0; i < N; ++i) { |
321 |
> |
/** |
322 |
> |
* retainAll(c) retains only those elements of c and reports true if changed |
323 |
> |
*/ |
324 |
> |
public void testRetainAll() { |
325 |
> |
LinkedList q = populatedQueue(SIZE); |
326 |
> |
LinkedList p = populatedQueue(SIZE); |
327 |
> |
for (int i = 0; i < SIZE; ++i) { |
328 |
|
boolean changed = q.retainAll(p); |
329 |
|
if (i == 0) |
330 |
|
assertFalse(changed); |
332 |
|
assertTrue(changed); |
333 |
|
|
334 |
|
assertTrue(q.containsAll(p)); |
335 |
< |
assertEquals(N-i, q.size()); |
335 |
> |
assertEquals(SIZE - i, q.size()); |
336 |
|
p.remove(); |
337 |
|
} |
338 |
|
} |
339 |
|
|
340 |
< |
public void testRemoveAll(){ |
341 |
< |
for (int i = 1; i < N; ++i) { |
342 |
< |
LinkedList q = fullQueue(N); |
343 |
< |
LinkedList p = fullQueue(i); |
340 |
> |
/** |
341 |
> |
* removeAll(c) removes only those elements of c and reports true if changed |
342 |
> |
*/ |
343 |
> |
public void testRemoveAll() { |
344 |
> |
for (int i = 1; i < SIZE; ++i) { |
345 |
> |
LinkedList q = populatedQueue(SIZE); |
346 |
> |
LinkedList p = populatedQueue(i); |
347 |
|
assertTrue(q.removeAll(p)); |
348 |
< |
assertEquals(N-i, q.size()); |
348 |
> |
assertEquals(SIZE - i, q.size()); |
349 |
|
for (int j = 0; j < i; ++j) { |
350 |
< |
Integer I = (Integer)(p.remove()); |
351 |
< |
assertFalse(q.contains(I)); |
350 |
> |
Integer x = (Integer)(p.remove()); |
351 |
> |
assertFalse(q.contains(x)); |
352 |
|
} |
353 |
|
} |
354 |
|
} |
355 |
|
|
356 |
< |
public void testToArray(){ |
357 |
< |
LinkedList q = fullQueue(N); |
358 |
< |
Object[] o = q.toArray(); |
359 |
< |
Arrays.sort(o); |
360 |
< |
for(int i = 0; i < o.length; i++) |
361 |
< |
assertEquals(o[i], q.poll()); |
356 |
> |
/** |
357 |
> |
* toArray contains all elements in FIFO order |
358 |
> |
*/ |
359 |
> |
public void testToArray() { |
360 |
> |
LinkedList q = populatedQueue(SIZE); |
361 |
> |
Object[] a = q.toArray(); |
362 |
> |
assertSame(Object[].class, a.getClass()); |
363 |
> |
for (Object o : a) |
364 |
> |
assertSame(o, q.poll()); |
365 |
> |
assertTrue(q.isEmpty()); |
366 |
> |
} |
367 |
> |
|
368 |
> |
/** |
369 |
> |
* toArray(a) contains all elements in FIFO order |
370 |
> |
*/ |
371 |
> |
public void testToArray2() { |
372 |
> |
LinkedList<Integer> q = populatedQueue(SIZE); |
373 |
> |
Integer[] ints = new Integer[SIZE]; |
374 |
> |
Integer[] array = q.toArray(ints); |
375 |
> |
assertSame(ints, array); |
376 |
> |
for (Integer o : ints) |
377 |
> |
assertSame(o, q.poll()); |
378 |
> |
assertTrue(q.isEmpty()); |
379 |
|
} |
380 |
|
|
381 |
< |
public void testToArray2(){ |
382 |
< |
LinkedList q = fullQueue(N); |
383 |
< |
Integer[] ints = new Integer[N]; |
384 |
< |
ints = (Integer[])q.toArray(ints); |
385 |
< |
Arrays.sort(ints); |
386 |
< |
for(int i = 0; i < ints.length; i++) |
387 |
< |
assertEquals(ints[i], q.poll()); |
381 |
> |
/** |
382 |
> |
* toArray(null) throws NullPointerException |
383 |
> |
*/ |
384 |
> |
public void testToArray_NullArg() { |
385 |
> |
LinkedList l = new LinkedList(); |
386 |
> |
l.add(new Object()); |
387 |
> |
try { |
388 |
> |
l.toArray(null); |
389 |
> |
shouldThrow(); |
390 |
> |
} catch (NullPointerException success) {} |
391 |
|
} |
392 |
< |
|
393 |
< |
public void testIterator(){ |
394 |
< |
LinkedList q = fullQueue(N); |
395 |
< |
int i = 0; |
396 |
< |
Iterator it = q.iterator(); |
397 |
< |
while(it.hasNext()) { |
392 |
> |
|
393 |
> |
/** |
394 |
> |
* toArray(incompatible array type) throws ArrayStoreException |
395 |
> |
*/ |
396 |
> |
public void testToArray1_BadArg() { |
397 |
> |
LinkedList l = new LinkedList(); |
398 |
> |
l.add(new Integer(5)); |
399 |
> |
try { |
400 |
> |
l.toArray(new String[10]); |
401 |
> |
shouldThrow(); |
402 |
> |
} catch (ArrayStoreException success) {} |
403 |
> |
} |
404 |
> |
|
405 |
> |
/** |
406 |
> |
* iterator iterates through all elements |
407 |
> |
*/ |
408 |
> |
public void testIterator() { |
409 |
> |
LinkedList q = populatedQueue(SIZE); |
410 |
> |
Iterator it = q.iterator(); |
411 |
> |
int i; |
412 |
> |
for (i = 0; it.hasNext(); i++) |
413 |
|
assertTrue(q.contains(it.next())); |
414 |
< |
++i; |
415 |
< |
} |
276 |
< |
assertEquals(i, N); |
414 |
> |
assertEquals(i, SIZE); |
415 |
> |
assertIteratorExhausted(it); |
416 |
|
} |
417 |
|
|
418 |
< |
public void testIteratorOrdering() { |
418 |
> |
/** |
419 |
> |
* iterator of empty collection has no elements |
420 |
> |
*/ |
421 |
> |
public void testEmptyIterator() { |
422 |
> |
assertIteratorExhausted(new LinkedList().iterator()); |
423 |
> |
} |
424 |
|
|
425 |
+ |
/** |
426 |
+ |
* iterator ordering is FIFO |
427 |
+ |
*/ |
428 |
+ |
public void testIteratorOrdering() { |
429 |
|
final LinkedList q = new LinkedList(); |
282 |
– |
|
430 |
|
q.add(new Integer(1)); |
431 |
|
q.add(new Integer(2)); |
432 |
|
q.add(new Integer(3)); |
286 |
– |
|
433 |
|
int k = 0; |
434 |
|
for (Iterator it = q.iterator(); it.hasNext();) { |
435 |
< |
int i = ((Integer)(it.next())).intValue(); |
290 |
< |
assertEquals("items should come out in order", ++k, i); |
435 |
> |
assertEquals(++k, it.next()); |
436 |
|
} |
437 |
|
|
438 |
< |
assertEquals("should go through 3 elements", 3, k); |
438 |
> |
assertEquals(3, k); |
439 |
|
} |
440 |
|
|
441 |
< |
public void testIteratorRemove () { |
441 |
> |
/** |
442 |
> |
* iterator.remove removes current element |
443 |
> |
*/ |
444 |
> |
public void testIteratorRemove() { |
445 |
|
final LinkedList q = new LinkedList(); |
298 |
– |
|
446 |
|
q.add(new Integer(1)); |
447 |
|
q.add(new Integer(2)); |
448 |
|
q.add(new Integer(3)); |
302 |
– |
|
449 |
|
Iterator it = q.iterator(); |
450 |
< |
it.next(); |
450 |
> |
assertEquals(1, it.next()); |
451 |
|
it.remove(); |
306 |
– |
|
452 |
|
it = q.iterator(); |
453 |
< |
assertEquals(it.next(), new Integer(2)); |
454 |
< |
assertEquals(it.next(), new Integer(3)); |
453 |
> |
assertEquals(2, it.next()); |
454 |
> |
assertEquals(3, it.next()); |
455 |
|
assertFalse(it.hasNext()); |
456 |
|
} |
457 |
|
|
458 |
+ |
/** |
459 |
+ |
* Descending iterator iterates through all elements |
460 |
+ |
*/ |
461 |
+ |
public void testDescendingIterator() { |
462 |
+ |
LinkedList q = populatedQueue(SIZE); |
463 |
+ |
int i = 0; |
464 |
+ |
Iterator it = q.descendingIterator(); |
465 |
+ |
while (it.hasNext()) { |
466 |
+ |
assertTrue(q.contains(it.next())); |
467 |
+ |
++i; |
468 |
+ |
} |
469 |
+ |
assertEquals(i, SIZE); |
470 |
+ |
assertFalse(it.hasNext()); |
471 |
+ |
try { |
472 |
+ |
it.next(); |
473 |
+ |
shouldThrow(); |
474 |
+ |
} catch (NoSuchElementException success) {} |
475 |
+ |
} |
476 |
|
|
477 |
< |
public void testToString(){ |
478 |
< |
LinkedList q = fullQueue(N); |
477 |
> |
/** |
478 |
> |
* Descending iterator ordering is reverse FIFO |
479 |
> |
*/ |
480 |
> |
public void testDescendingIteratorOrdering() { |
481 |
> |
final LinkedList q = new LinkedList(); |
482 |
> |
q.add(new Integer(3)); |
483 |
> |
q.add(new Integer(2)); |
484 |
> |
q.add(new Integer(1)); |
485 |
> |
int k = 0; |
486 |
> |
for (Iterator it = q.descendingIterator(); it.hasNext();) { |
487 |
> |
assertEquals(++k, it.next()); |
488 |
> |
} |
489 |
> |
|
490 |
> |
assertEquals(3, k); |
491 |
> |
} |
492 |
> |
|
493 |
> |
/** |
494 |
> |
* descendingIterator.remove removes current element |
495 |
> |
*/ |
496 |
> |
public void testDescendingIteratorRemove() { |
497 |
> |
final LinkedList q = new LinkedList(); |
498 |
> |
q.add(three); |
499 |
> |
q.add(two); |
500 |
> |
q.add(one); |
501 |
> |
Iterator it = q.descendingIterator(); |
502 |
> |
it.next(); |
503 |
> |
it.remove(); |
504 |
> |
it = q.descendingIterator(); |
505 |
> |
assertSame(it.next(), two); |
506 |
> |
assertSame(it.next(), three); |
507 |
> |
assertFalse(it.hasNext()); |
508 |
> |
} |
509 |
> |
|
510 |
> |
/** |
511 |
> |
* toString contains toStrings of elements |
512 |
> |
*/ |
513 |
> |
public void testToString() { |
514 |
> |
LinkedList q = populatedQueue(SIZE); |
515 |
|
String s = q.toString(); |
516 |
< |
for (int i = 0; i < N; ++i) { |
517 |
< |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
516 |
> |
for (int i = 0; i < SIZE; ++i) { |
517 |
> |
assertTrue(s.contains(String.valueOf(i))); |
518 |
|
} |
519 |
< |
} |
519 |
> |
} |
520 |
|
|
521 |
< |
public void testAddFirst(){ |
522 |
< |
LinkedList q = fullQueue(3); |
523 |
< |
q.addFirst(new Integer(4)); |
524 |
< |
assertEquals(new Integer(4),q.get(0)); |
525 |
< |
} |
526 |
< |
|
527 |
< |
public void testAddLast(){ |
329 |
< |
LinkedList q = fullQueue(3); |
330 |
< |
q.addLast(new Integer(3)); |
331 |
< |
assertEquals(new Integer(3),q.get(3)); |
332 |
< |
} |
333 |
< |
|
334 |
< |
public void testGetFirst() { |
335 |
< |
LinkedList q = fullQueue(3); |
336 |
< |
assertEquals(new Integer(0),q.getFirst()); |
337 |
< |
} |
338 |
< |
|
339 |
< |
public void testGetLast() { |
340 |
< |
LinkedList q = fullQueue(3); |
341 |
< |
assertEquals(new Integer(2),q.getLast()); |
342 |
< |
} |
343 |
< |
|
344 |
< |
public void testIndexOf(){ |
345 |
< |
LinkedList q = fullQueue(3); |
346 |
< |
assertEquals(0,q.indexOf(new Integer(0))); |
347 |
< |
assertEquals(1,q.indexOf(new Integer(1))); |
348 |
< |
assertEquals(2,q.indexOf(new Integer(2))); |
349 |
< |
assertEquals(-1, q.indexOf("not there")); |
521 |
> |
/** |
522 |
> |
* peek returns element inserted with addFirst |
523 |
> |
*/ |
524 |
> |
public void testAddFirst() { |
525 |
> |
LinkedList q = populatedQueue(3); |
526 |
> |
q.addFirst(four); |
527 |
> |
assertSame(four, q.peek()); |
528 |
|
} |
529 |
|
|
530 |
< |
public void testLastIndexOf(){ |
531 |
< |
LinkedList q = fullQueue(3); |
532 |
< |
q.add(new Integer(2)); |
533 |
< |
assertEquals(3,q.lastIndexOf(new Integer(2))); |
534 |
< |
assertEquals(-1, q.lastIndexOf("not there")); |
530 |
> |
/** |
531 |
> |
* peekFirst returns element inserted with push |
532 |
> |
*/ |
533 |
> |
public void testPush() { |
534 |
> |
LinkedList q = populatedQueue(3); |
535 |
> |
q.push(four); |
536 |
> |
assertSame(four, q.peekFirst()); |
537 |
|
} |
538 |
< |
|
539 |
< |
public void testSet(){ |
540 |
< |
LinkedList q = fullQueue(3); |
541 |
< |
q.set(0,(new Integer(1))); |
542 |
< |
assertFalse(q.contains(new Integer(0))); |
543 |
< |
assertEquals(new Integer(1), q.get(0)); |
544 |
< |
} |
545 |
< |
|
546 |
< |
|
547 |
< |
public void testGetFirst_NoSuchElementException(){ |
548 |
< |
try { |
549 |
< |
LinkedList l = new LinkedList(); |
550 |
< |
l.getFirst(); |
371 |
< |
fail("First Element"); |
372 |
< |
} |
373 |
< |
catch(NoSuchElementException success) {} |
374 |
< |
} |
375 |
< |
|
376 |
< |
public void testRemoveFirst() { |
377 |
< |
try { |
378 |
< |
LinkedList l = new LinkedList(); |
379 |
< |
l.removeFirst(); |
380 |
< |
fail("R: First Element"); |
381 |
< |
} |
382 |
< |
catch(NoSuchElementException success) {} |
383 |
< |
} |
384 |
< |
|
385 |
< |
public void testRemoveLast() { |
386 |
< |
try { |
387 |
< |
LinkedList l = new LinkedList(); |
388 |
< |
l.removeLast(); |
389 |
< |
fail("R: Last Element"); |
390 |
< |
} |
391 |
< |
catch(NoSuchElementException success) {} |
392 |
< |
} |
393 |
< |
|
394 |
< |
public void testGetLast_NoSuchElementException(){ |
395 |
< |
try { |
396 |
< |
LinkedList l = new LinkedList(); |
397 |
< |
l.getLast(); |
398 |
< |
fail("Last Element"); |
399 |
< |
} |
400 |
< |
catch(NoSuchElementException success) {} |
401 |
< |
} |
402 |
< |
|
403 |
< |
|
404 |
< |
public void testAddAll_NullPointerException(){ |
405 |
< |
try { |
406 |
< |
LinkedList l = new LinkedList(); |
407 |
< |
l.addAll((Collection)null); |
408 |
< |
fail("Add All Failed"); |
409 |
< |
} |
410 |
< |
catch(NullPointerException success){} |
411 |
< |
} |
412 |
< |
|
413 |
< |
|
414 |
< |
public void testAddAll1_OutOfBounds() { |
415 |
< |
try { |
416 |
< |
LinkedList l = new LinkedList(); |
417 |
< |
l.addAll(4,new LinkedList()); |
418 |
< |
fail("boolean addAll(int, Collection) should throw IndexOutOfBoundsException"); |
419 |
< |
} |
420 |
< |
catch(IndexOutOfBoundsException success) {} |
538 |
> |
|
539 |
> |
/** |
540 |
> |
* pop removes next element, or throws NSEE if empty |
541 |
> |
*/ |
542 |
> |
public void testPop() { |
543 |
> |
LinkedList q = populatedQueue(SIZE); |
544 |
> |
for (int i = 0; i < SIZE; ++i) { |
545 |
> |
assertEquals(i, q.pop()); |
546 |
> |
} |
547 |
> |
try { |
548 |
> |
q.pop(); |
549 |
> |
shouldThrow(); |
550 |
> |
} catch (NoSuchElementException success) {} |
551 |
|
} |
552 |
< |
|
553 |
< |
|
554 |
< |
public void testAddAll2_IndexOutOfBoundsException() { |
555 |
< |
try { |
556 |
< |
LinkedList l = new LinkedList(); |
557 |
< |
l.add(new Object()); |
558 |
< |
LinkedList m = new LinkedList(); |
559 |
< |
m.add(new Object()); |
430 |
< |
l.addAll(4,m); |
431 |
< |
fail("Add All Failed " + l.size()); |
432 |
< |
}catch(IndexOutOfBoundsException success) {} |
552 |
> |
|
553 |
> |
/** |
554 |
> |
* OfferFirst succeeds |
555 |
> |
*/ |
556 |
> |
public void testOfferFirst() { |
557 |
> |
LinkedList q = new LinkedList(); |
558 |
> |
assertTrue(q.offerFirst(new Integer(0))); |
559 |
> |
assertTrue(q.offerFirst(new Integer(1))); |
560 |
|
} |
561 |
|
|
562 |
< |
public void testAddAll4_BadIndex() { |
563 |
< |
try { |
564 |
< |
LinkedList l = new LinkedList(); |
565 |
< |
l.add(new Object()); |
566 |
< |
LinkedList m = new LinkedList(); |
567 |
< |
m.add(new Object()); |
568 |
< |
l.addAll(-1,m); |
442 |
< |
fail("Add All Failed " + l.size()); |
443 |
< |
}catch(IndexOutOfBoundsException success){} |
444 |
< |
} |
445 |
< |
|
446 |
< |
public void testget1() { |
447 |
< |
try { |
448 |
< |
LinkedList l = new LinkedList(); |
449 |
< |
l.add(new Object()); |
450 |
< |
l.get(-1); |
451 |
< |
fail("get Failed - l.get(-1)"); |
452 |
< |
}catch(IndexOutOfBoundsException success) {} |
453 |
< |
} |
454 |
< |
|
455 |
< |
public void testget2() { |
456 |
< |
try { |
457 |
< |
LinkedList l = new LinkedList(); |
458 |
< |
l.add(new Object()); |
459 |
< |
l.get(5); |
460 |
< |
fail("get Failed - l.get(5) l.size(): " + l.size()); |
461 |
< |
}catch(IndexOutOfBoundsException success){} |
462 |
< |
} |
463 |
< |
|
464 |
< |
public void testset1() { |
465 |
< |
try { |
466 |
< |
LinkedList l = new LinkedList(); |
467 |
< |
l.add(new Object()); |
468 |
< |
l.set(-1,new Object()); |
469 |
< |
fail("set failed - l.set(-1,...)" + l.size()); |
470 |
< |
}catch(IndexOutOfBoundsException success){} |
471 |
< |
} |
472 |
< |
|
473 |
< |
public void testset2() { |
474 |
< |
try { |
475 |
< |
LinkedList l = new LinkedList(); |
476 |
< |
l.add(new Object()); |
477 |
< |
l.set(5,new Object()); |
478 |
< |
fail("set failed = l.set(5,..) l.size():" + l.size()); |
479 |
< |
}catch(IndexOutOfBoundsException success){} |
480 |
< |
} |
481 |
< |
|
482 |
< |
public void testadd1() { |
483 |
< |
try { |
484 |
< |
LinkedList l = new LinkedList(); |
485 |
< |
l.add(new Object()); |
486 |
< |
l.add(-1,new Object()); |
487 |
< |
fail("Add Failed - l.add(-1) l.size(): " + l.size()); |
488 |
< |
}catch(IndexOutOfBoundsException success){} |
489 |
< |
} |
490 |
< |
|
491 |
< |
public void add2(){ |
492 |
< |
try { |
493 |
< |
LinkedList l = new LinkedList(); |
494 |
< |
l.add(new Object()); |
495 |
< |
l.add(5,new Object()); |
496 |
< |
fail("Add Failed l.add(f,...)"); |
497 |
< |
}catch(IndexOutOfBoundsException success) {} |
498 |
< |
} |
499 |
< |
|
500 |
< |
public void testremove(){ |
501 |
< |
try { |
502 |
< |
LinkedList l = new LinkedList(); |
503 |
< |
l.add(new Object()); |
504 |
< |
l.remove(-1); |
505 |
< |
fail("Remove Failed l.remove(-1); l.size():" + l.size()); |
506 |
< |
}catch(IndexOutOfBoundsException success){} |
507 |
< |
} |
508 |
< |
|
509 |
< |
public void testremove1(){ |
510 |
< |
try { |
511 |
< |
LinkedList l = new LinkedList(); |
512 |
< |
l.add(new Object()); |
513 |
< |
l.remove(5); |
514 |
< |
fail("Remove Failed l.remove(5); l.size():" + l.size()); |
515 |
< |
}catch(IndexOutOfBoundsException success){} |
516 |
< |
} |
517 |
< |
|
518 |
< |
|
519 |
< |
public void testremove2(){ |
520 |
< |
try{ |
521 |
< |
LinkedList l = new LinkedList(); |
522 |
< |
l.remove(); |
523 |
< |
fail("LinkedList - Object remove() should throw a NoSuchElementException"); |
524 |
< |
}catch(NoSuchElementException e){} |
525 |
< |
} |
526 |
< |
|
527 |
< |
public void testlistIt1() { |
528 |
< |
try { |
529 |
< |
LinkedList l = new LinkedList(); |
530 |
< |
l.add(new Object()); |
531 |
< |
l.listIterator(5); |
532 |
< |
fail("l.listIterator(5) l.size():" + l.size()); |
533 |
< |
}catch(IndexOutOfBoundsException success){} |
534 |
< |
} |
535 |
< |
|
536 |
< |
public void testlistIt2() { |
537 |
< |
try { |
538 |
< |
LinkedList l = new LinkedList(); |
539 |
< |
l.add(new Object()); |
540 |
< |
l.listIterator(-1); |
541 |
< |
fail("l.listIterator(-1) l.size():" + l.size()); |
542 |
< |
}catch(IndexOutOfBoundsException success){} |
543 |
< |
} |
544 |
< |
|
545 |
< |
public void testlistIt3() { |
546 |
< |
try { |
547 |
< |
LinkedList l = new LinkedList(); |
548 |
< |
l.add(new Object()); |
549 |
< |
ListIterator a = l.listIterator(0); |
550 |
< |
l.removeFirst(); |
551 |
< |
a.next(); |
552 |
< |
fail("l.listIterator(-1) l.size():" + l.size()); |
553 |
< |
}catch(ConcurrentModificationException success){} |
554 |
< |
} |
555 |
< |
|
556 |
< |
public void testToArray_BadArg() { |
557 |
< |
try { |
558 |
< |
LinkedList l = new LinkedList(); |
559 |
< |
l.add(new Object()); |
560 |
< |
Object o[] = l.toArray(null); |
561 |
< |
fail("l.toArray(null) did not throw an exception"); |
562 |
< |
}catch(NullPointerException success){} |
562 |
> |
/** |
563 |
> |
* OfferLast succeeds |
564 |
> |
*/ |
565 |
> |
public void testOfferLast() { |
566 |
> |
LinkedList q = new LinkedList(); |
567 |
> |
assertTrue(q.offerLast(new Integer(0))); |
568 |
> |
assertTrue(q.offerLast(new Integer(1))); |
569 |
|
} |
570 |
|
|
571 |
< |
public void testToArray1_BadArg() { |
572 |
< |
try { |
573 |
< |
LinkedList l = new LinkedList(); |
574 |
< |
l.add(new Integer(5)); |
575 |
< |
Object o[] = l.toArray(new String[10] ); |
576 |
< |
fail("l.toArray(String[] f) did not throw an exception, an Integer was added"); |
577 |
< |
}catch(ArrayStoreException success){} |
571 |
> |
/** |
572 |
> |
* pollLast succeeds unless empty |
573 |
> |
*/ |
574 |
> |
public void testPollLast() { |
575 |
> |
LinkedList q = populatedQueue(SIZE); |
576 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
577 |
> |
assertEquals(i, q.pollLast()); |
578 |
> |
} |
579 |
> |
assertNull(q.pollLast()); |
580 |
> |
} |
581 |
> |
|
582 |
> |
/** |
583 |
> |
* peekFirst returns next element, or null if empty |
584 |
> |
*/ |
585 |
> |
public void testPeekFirst() { |
586 |
> |
LinkedList q = populatedQueue(SIZE); |
587 |
> |
for (int i = 0; i < SIZE; ++i) { |
588 |
> |
assertEquals(i, q.peekFirst()); |
589 |
> |
assertEquals(i, q.pollFirst()); |
590 |
> |
assertTrue(q.peekFirst() == null || |
591 |
> |
!q.peekFirst().equals(i)); |
592 |
> |
} |
593 |
> |
assertNull(q.peekFirst()); |
594 |
> |
} |
595 |
> |
|
596 |
> |
/** |
597 |
> |
* peekLast returns next element, or null if empty |
598 |
> |
*/ |
599 |
> |
public void testPeekLast() { |
600 |
> |
LinkedList q = populatedQueue(SIZE); |
601 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
602 |
> |
assertEquals(i, q.peekLast()); |
603 |
> |
assertEquals(i, q.pollLast()); |
604 |
> |
assertTrue(q.peekLast() == null || |
605 |
> |
!q.peekLast().equals(i)); |
606 |
> |
} |
607 |
> |
assertNull(q.peekLast()); |
608 |
> |
} |
609 |
> |
|
610 |
> |
public void testFirstElement() { |
611 |
> |
LinkedList q = populatedQueue(SIZE); |
612 |
> |
for (int i = 0; i < SIZE; ++i) { |
613 |
> |
assertEquals(i, q.getFirst()); |
614 |
> |
assertEquals(i, q.pollFirst()); |
615 |
> |
} |
616 |
> |
try { |
617 |
> |
q.getFirst(); |
618 |
> |
shouldThrow(); |
619 |
> |
} catch (NoSuchElementException success) {} |
620 |
> |
} |
621 |
> |
|
622 |
> |
/** |
623 |
> |
* getLast returns next element, or throws NSEE if empty |
624 |
> |
*/ |
625 |
> |
public void testLastElement() { |
626 |
> |
LinkedList q = populatedQueue(SIZE); |
627 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
628 |
> |
assertEquals(i, q.getLast()); |
629 |
> |
assertEquals(i, q.pollLast()); |
630 |
> |
} |
631 |
> |
try { |
632 |
> |
q.getLast(); |
633 |
> |
shouldThrow(); |
634 |
> |
} catch (NoSuchElementException success) {} |
635 |
> |
assertNull(q.peekLast()); |
636 |
> |
} |
637 |
> |
|
638 |
> |
/** |
639 |
> |
* removeFirstOccurrence(x) removes x and returns true if present |
640 |
> |
*/ |
641 |
> |
public void testRemoveFirstOccurrence() { |
642 |
> |
LinkedList q = populatedQueue(SIZE); |
643 |
> |
for (int i = 1; i < SIZE; i += 2) { |
644 |
> |
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
645 |
> |
} |
646 |
> |
for (int i = 0; i < SIZE; i += 2) { |
647 |
> |
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
648 |
> |
assertFalse(q.removeFirstOccurrence(new Integer(i + 1))); |
649 |
> |
} |
650 |
> |
assertTrue(q.isEmpty()); |
651 |
> |
} |
652 |
> |
|
653 |
> |
/** |
654 |
> |
* removeLastOccurrence(x) removes x and returns true if present |
655 |
> |
*/ |
656 |
> |
public void testRemoveLastOccurrence() { |
657 |
> |
LinkedList q = populatedQueue(SIZE); |
658 |
> |
for (int i = 1; i < SIZE; i += 2) { |
659 |
> |
assertTrue(q.removeLastOccurrence(new Integer(i))); |
660 |
> |
} |
661 |
> |
for (int i = 0; i < SIZE; i += 2) { |
662 |
> |
assertTrue(q.removeLastOccurrence(new Integer(i))); |
663 |
> |
assertFalse(q.removeLastOccurrence(new Integer(i + 1))); |
664 |
> |
} |
665 |
> |
assertTrue(q.isEmpty()); |
666 |
|
} |
667 |
|
|
668 |
|
} |