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/* |
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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/licenses/publicdomain |
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* Written by Doug Lea and Martin Buchholz with assistance from |
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* members of JCP JSR-166 Expert Group and released to the public |
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* domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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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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import java.util.ArrayDeque; |
9 |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Collections; |
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import java.util.Deque; |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
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import java.util.Queue; |
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import java.util.Random; |
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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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import junit.framework.TestSuite; |
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public class ArrayDequeTest 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(ArrayDequeTest.class); |
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class Implementation implements CollectionImplementation { |
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public Class<?> klazz() { return ArrayDeque.class; } |
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public Collection emptyCollection() { return populatedDeque(0); } |
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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 false; } |
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} |
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return newTestSuite(ArrayDequeTest.class, |
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CollectionTest.testSuite(new Implementation())); |
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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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*/ |
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private ArrayDeque populatedDeque(int n) { |
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ArrayDeque q = new ArrayDeque(); |
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* Returns a new deque of given size containing consecutive |
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* Integers 0 ... n - 1. |
42 |
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*/ |
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private static ArrayDeque<Integer> populatedDeque(int n) { |
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// Randomize various aspects of memory layout, including |
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// filled-to-capacity and wraparound. |
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final ArrayDeque<Integer> q; |
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ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
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switch (rnd.nextInt(6)) { |
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case 0: q = new ArrayDeque<Integer>(); break; |
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case 1: q = new ArrayDeque<Integer>(0); break; |
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case 2: q = new ArrayDeque<Integer>(1); break; |
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case 3: q = new ArrayDeque<Integer>(Math.max(0, n - 1)); break; |
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case 4: q = new ArrayDeque<Integer>(n); break; |
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case 5: q = new ArrayDeque<Integer>(n + 1); break; |
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default: throw new AssertionError(); |
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} |
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switch (rnd.nextInt(3)) { |
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case 0: |
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q.addFirst(42); |
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assertEquals((Integer) 42, q.removeLast()); |
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break; |
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case 1: |
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q.addLast(42); |
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assertEquals((Integer) 42, q.removeFirst()); |
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break; |
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case 2: /* do nothing */ break; |
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default: throw new AssertionError(); |
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} |
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assertTrue(q.isEmpty()); |
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for (int i = 0; i < n; ++i) |
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assertTrue(q.offerLast(new Integer(i))); |
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assertFalse(q.isEmpty()); |
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assertEquals(n, q.size()); |
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if (rnd.nextBoolean()) |
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for (int i = 0; i < n; i++) |
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assertTrue(q.offerLast((Integer) i)); |
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else |
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for (int i = n; --i >= 0; ) |
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q.addFirst((Integer) i); |
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assertEquals(n, q.size()); |
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if (n > 0) { |
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assertFalse(q.isEmpty()); |
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assertEquals((Integer) 0, q.peekFirst()); |
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assertEquals((Integer) (n - 1), q.peekLast()); |
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} |
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return q; |
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} |
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/** |
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* new queue is empty |
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* new deque is empty |
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*/ |
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public void testConstructor1() { |
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assertEquals(0, new ArrayDeque().size()); |
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*/ |
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public void testConstructor3() { |
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try { |
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ArrayDeque q = new ArrayDeque((Collection)null); |
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new ArrayDeque((Collection)null); |
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shouldThrow(); |
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} |
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catch (NullPointerException success) {} |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* Queue contains all elements of collection used to initialize |
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* Initializing from Collection of null elements throws NPE |
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*/ |
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public void testConstructor4() { |
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try { |
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new ArrayDeque(Arrays.asList(new Integer[SIZE])); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* Initializing from Collection with some null elements throws NPE |
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*/ |
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public void testConstructor6() { |
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public void testConstructor5() { |
116 |
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Integer[] ints = new Integer[SIZE]; |
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for (int i = 0; i < SIZE - 1; ++i) |
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ints[i] = new Integer(i); |
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try { |
120 |
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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] = new Integer(i); |
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ArrayDeque q = new ArrayDeque(Arrays.asList(ints)); |
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for (int i = 0; i < SIZE; ++i) |
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assertEquals(ints[i], q.pollFirst()); |
126 |
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} |
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finally {} |
120 |
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new ArrayDeque(Arrays.asList(ints)); |
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shouldThrow(); |
122 |
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} catch (NullPointerException success) {} |
123 |
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} |
124 |
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|
125 |
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/** |
126 |
> |
* Deque contains all elements of collection used to initialize |
127 |
> |
*/ |
128 |
> |
public void testConstructor6() { |
129 |
> |
Integer[] ints = new Integer[SIZE]; |
130 |
> |
for (int i = 0; i < SIZE; ++i) |
131 |
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ints[i] = new Integer(i); |
132 |
> |
ArrayDeque q = new ArrayDeque(Arrays.asList(ints)); |
133 |
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for (int i = 0; i < SIZE; ++i) |
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> |
assertEquals(ints[i], q.pollFirst()); |
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} |
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/** |
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public void testSize() { |
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ArrayDeque q = populatedDeque(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
157 |
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assertEquals(SIZE-i, q.size()); |
157 |
> |
assertEquals(SIZE - i, q.size()); |
158 |
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q.removeFirst(); |
159 |
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} |
160 |
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for (int i = 0; i < SIZE; ++i) { |
167 |
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* push(null) throws NPE |
168 |
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*/ |
169 |
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public void testPushNull() { |
170 |
< |
try { |
171 |
< |
ArrayDeque q = new ArrayDeque(1); |
170 |
> |
ArrayDeque q = new ArrayDeque(1); |
171 |
> |
try { |
172 |
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q.push(null); |
173 |
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shouldThrow(); |
174 |
< |
} catch (NullPointerException success) { } |
174 |
> |
} catch (NullPointerException success) {} |
175 |
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} |
176 |
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|
177 |
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/** |
178 |
< |
* peekFirst returns element inserted with push |
178 |
> |
* peekFirst() returns element inserted with push |
179 |
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*/ |
180 |
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public void testPush() { |
181 |
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ArrayDeque q = populatedDeque(3); |
182 |
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q.pollLast(); |
183 |
< |
q.push(four); |
184 |
< |
assertEquals(four,q.peekFirst()); |
183 |
> |
q.push(four); |
184 |
> |
assertSame(four, q.peekFirst()); |
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} |
186 |
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|
187 |
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/** |
188 |
< |
* pop removes next element, or throws NSEE if empty |
188 |
> |
* pop() removes next element, or throws NSEE if empty |
189 |
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*/ |
190 |
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public void testPop() { |
191 |
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ArrayDeque q = populatedDeque(SIZE); |
192 |
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for (int i = 0; i < SIZE; ++i) { |
193 |
< |
assertEquals(i, ((Integer)q.pop()).intValue()); |
193 |
> |
assertEquals(i, q.pop()); |
194 |
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} |
195 |
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try { |
196 |
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q.pop(); |
197 |
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shouldThrow(); |
198 |
< |
} catch (NoSuchElementException success) { |
130 |
< |
} |
198 |
> |
} catch (NoSuchElementException success) {} |
199 |
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} |
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|
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/** |
202 |
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* offer(null) throws NPE |
203 |
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*/ |
204 |
+ |
public void testOfferNull() { |
205 |
+ |
ArrayDeque q = new ArrayDeque(); |
206 |
+ |
try { |
207 |
+ |
q.offer(null); |
208 |
+ |
shouldThrow(); |
209 |
+ |
} catch (NullPointerException success) {} |
210 |
+ |
} |
211 |
+ |
|
212 |
+ |
/** |
213 |
+ |
* offerFirst(null) throws NPE |
214 |
+ |
*/ |
215 |
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public void testOfferFirstNull() { |
216 |
< |
try { |
217 |
< |
ArrayDeque q = new ArrayDeque(); |
216 |
> |
ArrayDeque q = new ArrayDeque(); |
217 |
> |
try { |
218 |
|
q.offerFirst(null); |
219 |
|
shouldThrow(); |
220 |
< |
} catch (NullPointerException success) { |
221 |
< |
} |
220 |
> |
} catch (NullPointerException success) {} |
221 |
> |
} |
222 |
> |
|
223 |
> |
/** |
224 |
> |
* offerLast(null) throws NPE |
225 |
> |
*/ |
226 |
> |
public void testOfferLastNull() { |
227 |
> |
ArrayDeque q = new ArrayDeque(); |
228 |
> |
try { |
229 |
> |
q.offerLast(null); |
230 |
> |
shouldThrow(); |
231 |
> |
} catch (NullPointerException success) {} |
232 |
|
} |
233 |
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|
234 |
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/** |
235 |
< |
* OfferFirst succeeds |
235 |
> |
* offer(x) succeeds |
236 |
> |
*/ |
237 |
> |
public void testOffer() { |
238 |
> |
ArrayDeque q = new ArrayDeque(); |
239 |
> |
assertTrue(q.offer(zero)); |
240 |
> |
assertTrue(q.offer(one)); |
241 |
> |
assertSame(zero, q.peekFirst()); |
242 |
> |
assertSame(one, q.peekLast()); |
243 |
> |
} |
244 |
> |
|
245 |
> |
/** |
246 |
> |
* offerFirst(x) succeeds |
247 |
|
*/ |
248 |
|
public void testOfferFirst() { |
249 |
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ArrayDeque q = new ArrayDeque(); |
250 |
< |
assertTrue(q.offerFirst(new Integer(0))); |
251 |
< |
assertTrue(q.offerFirst(new Integer(1))); |
250 |
> |
assertTrue(q.offerFirst(zero)); |
251 |
> |
assertTrue(q.offerFirst(one)); |
252 |
> |
assertSame(one, q.peekFirst()); |
253 |
> |
assertSame(zero, q.peekLast()); |
254 |
|
} |
255 |
|
|
256 |
|
/** |
257 |
< |
* OfferLast succeeds |
257 |
> |
* offerLast(x) succeeds |
258 |
|
*/ |
259 |
|
public void testOfferLast() { |
260 |
|
ArrayDeque q = new ArrayDeque(); |
261 |
< |
assertTrue(q.offerLast(new Integer(0))); |
262 |
< |
assertTrue(q.offerLast(new Integer(1))); |
261 |
> |
assertTrue(q.offerLast(zero)); |
262 |
> |
assertTrue(q.offerLast(one)); |
263 |
> |
assertSame(zero, q.peekFirst()); |
264 |
> |
assertSame(one, q.peekLast()); |
265 |
|
} |
266 |
|
|
267 |
|
/** |
268 |
< |
* add succeeds |
268 |
> |
* add(null) throws NPE |
269 |
> |
*/ |
270 |
> |
public void testAddNull() { |
271 |
> |
ArrayDeque q = new ArrayDeque(); |
272 |
> |
try { |
273 |
> |
q.add(null); |
274 |
> |
shouldThrow(); |
275 |
> |
} catch (NullPointerException success) {} |
276 |
> |
} |
277 |
> |
|
278 |
> |
/** |
279 |
> |
* addFirst(null) throws NPE |
280 |
> |
*/ |
281 |
> |
public void testAddFirstNull() { |
282 |
> |
ArrayDeque q = new ArrayDeque(); |
283 |
> |
try { |
284 |
> |
q.addFirst(null); |
285 |
> |
shouldThrow(); |
286 |
> |
} catch (NullPointerException success) {} |
287 |
> |
} |
288 |
> |
|
289 |
> |
/** |
290 |
> |
* addLast(null) throws NPE |
291 |
> |
*/ |
292 |
> |
public void testAddLastNull() { |
293 |
> |
ArrayDeque q = new ArrayDeque(); |
294 |
> |
try { |
295 |
> |
q.addLast(null); |
296 |
> |
shouldThrow(); |
297 |
> |
} catch (NullPointerException success) {} |
298 |
> |
} |
299 |
> |
|
300 |
> |
/** |
301 |
> |
* add(x) succeeds |
302 |
|
*/ |
303 |
|
public void testAdd() { |
304 |
|
ArrayDeque q = new ArrayDeque(); |
305 |
< |
for (int i = 0; i < SIZE; ++i) { |
306 |
< |
assertEquals(i, q.size()); |
307 |
< |
assertTrue(q.add(new Integer(i))); |
308 |
< |
} |
305 |
> |
assertTrue(q.add(zero)); |
306 |
> |
assertTrue(q.add(one)); |
307 |
> |
assertSame(zero, q.peekFirst()); |
308 |
> |
assertSame(one, q.peekLast()); |
309 |
> |
} |
310 |
> |
|
311 |
> |
/** |
312 |
> |
* addFirst(x) succeeds |
313 |
> |
*/ |
314 |
> |
public void testAddFirst() { |
315 |
> |
ArrayDeque q = new ArrayDeque(); |
316 |
> |
q.addFirst(zero); |
317 |
> |
q.addFirst(one); |
318 |
> |
assertSame(one, q.peekFirst()); |
319 |
> |
assertSame(zero, q.peekLast()); |
320 |
> |
} |
321 |
> |
|
322 |
> |
/** |
323 |
> |
* addLast(x) succeeds |
324 |
> |
*/ |
325 |
> |
public void testAddLast() { |
326 |
> |
ArrayDeque q = new ArrayDeque(); |
327 |
> |
q.addLast(zero); |
328 |
> |
q.addLast(one); |
329 |
> |
assertSame(zero, q.peekFirst()); |
330 |
> |
assertSame(one, q.peekLast()); |
331 |
|
} |
332 |
|
|
333 |
|
/** |
334 |
|
* addAll(null) throws NPE |
335 |
|
*/ |
336 |
|
public void testAddAll1() { |
337 |
+ |
ArrayDeque q = new ArrayDeque(); |
338 |
|
try { |
179 |
– |
ArrayDeque q = new ArrayDeque(); |
339 |
|
q.addAll(null); |
340 |
|
shouldThrow(); |
341 |
< |
} |
183 |
< |
catch (NullPointerException success) {} |
341 |
> |
} catch (NullPointerException success) {} |
342 |
|
} |
343 |
|
|
344 |
|
/** |
345 |
< |
* Queue contains all elements, in traversal order, of successful addAll |
345 |
> |
* addAll of a collection with null elements throws NPE |
346 |
|
*/ |
347 |
< |
public void testAddAll5() { |
347 |
> |
public void testAddAll2() { |
348 |
> |
ArrayDeque q = new ArrayDeque(); |
349 |
|
try { |
350 |
< |
Integer[] empty = new Integer[0]; |
351 |
< |
Integer[] ints = new Integer[SIZE]; |
352 |
< |
for (int i = 0; i < SIZE; ++i) |
353 |
< |
ints[i] = new Integer(i); |
354 |
< |
ArrayDeque q = new ArrayDeque(); |
355 |
< |
assertFalse(q.addAll(Arrays.asList(empty))); |
356 |
< |
assertTrue(q.addAll(Arrays.asList(ints))); |
357 |
< |
for (int i = 0; i < SIZE; ++i) |
358 |
< |
assertEquals(ints[i], q.pollFirst()); |
359 |
< |
} |
360 |
< |
finally {} |
350 |
> |
q.addAll(Arrays.asList(new Integer[SIZE])); |
351 |
> |
shouldThrow(); |
352 |
> |
} catch (NullPointerException success) {} |
353 |
> |
} |
354 |
> |
|
355 |
> |
/** |
356 |
> |
* addAll of a collection with any null elements throws NPE after |
357 |
> |
* possibly adding some elements |
358 |
> |
*/ |
359 |
> |
public void testAddAll3() { |
360 |
> |
ArrayDeque q = new ArrayDeque(); |
361 |
> |
Integer[] ints = new Integer[SIZE]; |
362 |
> |
for (int i = 0; i < SIZE - 1; ++i) |
363 |
> |
ints[i] = new Integer(i); |
364 |
> |
try { |
365 |
> |
q.addAll(Arrays.asList(ints)); |
366 |
> |
shouldThrow(); |
367 |
> |
} catch (NullPointerException success) {} |
368 |
> |
} |
369 |
> |
|
370 |
> |
/** |
371 |
> |
* Deque contains all elements, in traversal order, of successful addAll |
372 |
> |
*/ |
373 |
> |
public void testAddAll5() { |
374 |
> |
Integer[] empty = new Integer[0]; |
375 |
> |
Integer[] ints = new Integer[SIZE]; |
376 |
> |
for (int i = 0; i < SIZE; ++i) |
377 |
> |
ints[i] = new Integer(i); |
378 |
> |
ArrayDeque q = new ArrayDeque(); |
379 |
> |
assertFalse(q.addAll(Arrays.asList(empty))); |
380 |
> |
assertTrue(q.addAll(Arrays.asList(ints))); |
381 |
> |
for (int i = 0; i < SIZE; ++i) |
382 |
> |
assertEquals(ints[i], q.pollFirst()); |
383 |
|
} |
384 |
|
|
385 |
|
/** |
386 |
< |
* pollFirst succeeds unless empty |
386 |
> |
* pollFirst() succeeds unless empty |
387 |
|
*/ |
388 |
|
public void testPollFirst() { |
389 |
|
ArrayDeque q = populatedDeque(SIZE); |
390 |
|
for (int i = 0; i < SIZE; ++i) { |
391 |
< |
assertEquals(i, ((Integer)q.pollFirst()).intValue()); |
391 |
> |
assertEquals(i, q.pollFirst()); |
392 |
|
} |
393 |
< |
assertNull(q.pollFirst()); |
393 |
> |
assertNull(q.pollFirst()); |
394 |
|
} |
395 |
|
|
396 |
|
/** |
397 |
< |
* pollLast succeeds unless empty |
397 |
> |
* pollLast() succeeds unless empty |
398 |
|
*/ |
399 |
|
public void testPollLast() { |
400 |
|
ArrayDeque q = populatedDeque(SIZE); |
401 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
402 |
< |
assertEquals(i, ((Integer)q.pollLast()).intValue()); |
401 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
402 |
> |
assertEquals(i, q.pollLast()); |
403 |
|
} |
404 |
< |
assertNull(q.pollLast()); |
404 |
> |
assertNull(q.pollLast()); |
405 |
|
} |
406 |
|
|
407 |
|
/** |
408 |
< |
* poll succeeds unless empty |
408 |
> |
* poll() succeeds unless empty |
409 |
|
*/ |
410 |
|
public void testPoll() { |
411 |
|
ArrayDeque q = populatedDeque(SIZE); |
412 |
|
for (int i = 0; i < SIZE; ++i) { |
413 |
< |
assertEquals(i, ((Integer)q.poll()).intValue()); |
413 |
> |
assertEquals(i, q.poll()); |
414 |
|
} |
415 |
< |
assertNull(q.poll()); |
415 |
> |
assertNull(q.poll()); |
416 |
|
} |
417 |
|
|
418 |
|
/** |
419 |
< |
* remove removes next element, or throws NSEE if empty |
419 |
> |
* remove() removes next element, or throws NSEE if empty |
420 |
|
*/ |
421 |
|
public void testRemove() { |
422 |
|
ArrayDeque q = populatedDeque(SIZE); |
423 |
|
for (int i = 0; i < SIZE; ++i) { |
424 |
< |
assertEquals(i, ((Integer)q.remove()).intValue()); |
424 |
> |
assertEquals(i, q.remove()); |
425 |
|
} |
426 |
|
try { |
427 |
|
q.remove(); |
428 |
|
shouldThrow(); |
429 |
< |
} catch (NoSuchElementException success) { |
249 |
< |
} |
429 |
> |
} catch (NoSuchElementException success) {} |
430 |
|
} |
431 |
|
|
432 |
|
/** |
433 |
< |
* peekFirst returns next element, or null if empty |
433 |
> |
* remove(x) removes x and returns true if present |
434 |
> |
*/ |
435 |
> |
public void testRemoveElement() { |
436 |
> |
ArrayDeque q = populatedDeque(SIZE); |
437 |
> |
for (int i = 1; i < SIZE; i += 2) { |
438 |
> |
assertTrue(q.contains(i)); |
439 |
> |
assertTrue(q.remove(i)); |
440 |
> |
assertFalse(q.contains(i)); |
441 |
> |
assertTrue(q.contains(i - 1)); |
442 |
> |
} |
443 |
> |
for (int i = 0; i < SIZE; i += 2) { |
444 |
> |
assertTrue(q.contains(i)); |
445 |
> |
assertTrue(q.remove(i)); |
446 |
> |
assertFalse(q.contains(i)); |
447 |
> |
assertFalse(q.remove(i + 1)); |
448 |
> |
assertFalse(q.contains(i + 1)); |
449 |
> |
} |
450 |
> |
assertTrue(q.isEmpty()); |
451 |
> |
} |
452 |
> |
|
453 |
> |
/** |
454 |
> |
* peekFirst() returns next element, or null if empty |
455 |
|
*/ |
456 |
|
public void testPeekFirst() { |
457 |
|
ArrayDeque q = populatedDeque(SIZE); |
458 |
|
for (int i = 0; i < SIZE; ++i) { |
459 |
< |
assertEquals(i, ((Integer)q.peekFirst()).intValue()); |
460 |
< |
q.pollFirst(); |
459 |
> |
assertEquals(i, q.peekFirst()); |
460 |
> |
assertEquals(i, q.pollFirst()); |
461 |
|
assertTrue(q.peekFirst() == null || |
462 |
< |
i != ((Integer)q.peekFirst()).intValue()); |
462 |
> |
!q.peekFirst().equals(i)); |
463 |
|
} |
464 |
< |
assertNull(q.peekFirst()); |
464 |
> |
assertNull(q.peekFirst()); |
465 |
|
} |
466 |
|
|
467 |
|
/** |
468 |
< |
* peek returns next element, or null if empty |
468 |
> |
* peek() returns next element, or null if empty |
469 |
|
*/ |
470 |
|
public void testPeek() { |
471 |
|
ArrayDeque q = populatedDeque(SIZE); |
472 |
|
for (int i = 0; i < SIZE; ++i) { |
473 |
< |
assertEquals(i, ((Integer)q.peek()).intValue()); |
474 |
< |
q.poll(); |
473 |
> |
assertEquals(i, q.peek()); |
474 |
> |
assertEquals(i, q.poll()); |
475 |
|
assertTrue(q.peek() == null || |
476 |
< |
i != ((Integer)q.peek()).intValue()); |
476 |
> |
!q.peek().equals(i)); |
477 |
|
} |
478 |
< |
assertNull(q.peek()); |
478 |
> |
assertNull(q.peek()); |
479 |
|
} |
480 |
|
|
481 |
|
/** |
482 |
< |
* peekLast returns next element, or null if empty |
482 |
> |
* peekLast() returns next element, or null if empty |
483 |
|
*/ |
484 |
|
public void testPeekLast() { |
485 |
|
ArrayDeque q = populatedDeque(SIZE); |
486 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
487 |
< |
assertEquals(i, ((Integer)q.peekLast()).intValue()); |
488 |
< |
q.pollLast(); |
486 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
487 |
> |
assertEquals(i, q.peekLast()); |
488 |
> |
assertEquals(i, q.pollLast()); |
489 |
|
assertTrue(q.peekLast() == null || |
490 |
< |
i != ((Integer)q.peekLast()).intValue()); |
490 |
> |
!q.peekLast().equals(i)); |
491 |
|
} |
492 |
< |
assertNull(q.peekLast()); |
492 |
> |
assertNull(q.peekLast()); |
493 |
|
} |
494 |
|
|
495 |
|
/** |
496 |
< |
* getFirst returns next getFirst, or throws NSEE if empty |
496 |
> |
* element() returns first element, or throws NSEE if empty |
497 |
> |
*/ |
498 |
> |
public void testElement() { |
499 |
> |
ArrayDeque q = populatedDeque(SIZE); |
500 |
> |
for (int i = 0; i < SIZE; ++i) { |
501 |
> |
assertEquals(i, q.element()); |
502 |
> |
assertEquals(i, q.poll()); |
503 |
> |
} |
504 |
> |
try { |
505 |
> |
q.element(); |
506 |
> |
shouldThrow(); |
507 |
> |
} catch (NoSuchElementException success) {} |
508 |
> |
} |
509 |
> |
|
510 |
> |
/** |
511 |
> |
* getFirst() returns first element, or throws NSEE if empty |
512 |
|
*/ |
513 |
|
public void testFirstElement() { |
514 |
|
ArrayDeque q = populatedDeque(SIZE); |
515 |
|
for (int i = 0; i < SIZE; ++i) { |
516 |
< |
assertEquals(i, ((Integer)q.getFirst()).intValue()); |
517 |
< |
q.pollFirst(); |
516 |
> |
assertEquals(i, q.getFirst()); |
517 |
> |
assertEquals(i, q.pollFirst()); |
518 |
|
} |
519 |
|
try { |
520 |
|
q.getFirst(); |
521 |
|
shouldThrow(); |
522 |
< |
} |
307 |
< |
catch (NoSuchElementException success) {} |
522 |
> |
} catch (NoSuchElementException success) {} |
523 |
|
} |
524 |
|
|
525 |
|
/** |
526 |
< |
* getLast returns next element, or throws NSEE if empty |
526 |
> |
* getLast() returns last element, or throws NSEE if empty |
527 |
|
*/ |
528 |
|
public void testLastElement() { |
529 |
|
ArrayDeque q = populatedDeque(SIZE); |
530 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
531 |
< |
assertEquals(i, ((Integer)q.getLast()).intValue()); |
532 |
< |
q.pollLast(); |
530 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
531 |
> |
assertEquals(i, q.getLast()); |
532 |
> |
assertEquals(i, q.pollLast()); |
533 |
|
} |
534 |
|
try { |
535 |
|
q.getLast(); |
536 |
|
shouldThrow(); |
537 |
< |
} |
538 |
< |
catch (NoSuchElementException success) {} |
324 |
< |
assertNull(q.peekLast()); |
537 |
> |
} catch (NoSuchElementException success) {} |
538 |
> |
assertNull(q.peekLast()); |
539 |
|
} |
540 |
|
|
327 |
– |
|
541 |
|
/** |
542 |
< |
* removeFirst removes next element, or throws NSEE if empty |
542 |
> |
* removeFirst() removes first element, or throws NSEE if empty |
543 |
|
*/ |
544 |
|
public void testRemoveFirst() { |
545 |
|
ArrayDeque q = populatedDeque(SIZE); |
546 |
|
for (int i = 0; i < SIZE; ++i) { |
547 |
< |
assertEquals(i, ((Integer)q.removeFirst()).intValue()); |
547 |
> |
assertEquals(i, q.removeFirst()); |
548 |
|
} |
549 |
|
try { |
550 |
|
q.removeFirst(); |
551 |
|
shouldThrow(); |
552 |
< |
} catch (NoSuchElementException success) { |
553 |
< |
} |
552 |
> |
} catch (NoSuchElementException success) {} |
553 |
> |
assertNull(q.peekFirst()); |
554 |
|
} |
555 |
|
|
556 |
|
/** |
557 |
< |
* removeFirstOccurrence(x) removes x and returns true if present |
557 |
> |
* removeLast() removes last element, or throws NSEE if empty |
558 |
|
*/ |
559 |
< |
public void testRemoveFirstOccurrence() { |
559 |
> |
public void testRemoveLast() { |
560 |
|
ArrayDeque q = populatedDeque(SIZE); |
561 |
< |
for (int i = 1; i < SIZE; i+=2) { |
562 |
< |
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
561 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
562 |
> |
assertEquals(i, q.removeLast()); |
563 |
|
} |
564 |
< |
for (int i = 0; i < SIZE; i+=2) { |
565 |
< |
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
566 |
< |
assertFalse(q.removeFirstOccurrence(new Integer(i+1))); |
564 |
> |
try { |
565 |
> |
q.removeLast(); |
566 |
> |
shouldThrow(); |
567 |
> |
} catch (NoSuchElementException success) {} |
568 |
> |
assertNull(q.peekLast()); |
569 |
> |
} |
570 |
> |
|
571 |
> |
/** |
572 |
> |
* removeFirstOccurrence(x) removes x and returns true if present |
573 |
> |
*/ |
574 |
> |
public void testRemoveFirstOccurrence() { |
575 |
> |
Deque<Integer> q = populatedDeque(SIZE); |
576 |
> |
assertFalse(q.removeFirstOccurrence(null)); |
577 |
> |
for (int i = 1; i < SIZE; i += 2) { |
578 |
> |
assertTrue(q.removeFirstOccurrence(i)); |
579 |
> |
assertFalse(q.contains(i)); |
580 |
> |
} |
581 |
> |
for (int i = 0; i < SIZE; i += 2) { |
582 |
> |
assertTrue(q.removeFirstOccurrence(i)); |
583 |
> |
assertFalse(q.removeFirstOccurrence(i + 1)); |
584 |
> |
assertFalse(q.contains(i)); |
585 |
> |
assertFalse(q.contains(i + 1)); |
586 |
|
} |
587 |
|
assertTrue(q.isEmpty()); |
588 |
+ |
assertFalse(q.removeFirstOccurrence(null)); |
589 |
+ |
assertFalse(q.removeFirstOccurrence(42)); |
590 |
+ |
q = new ArrayDeque(); |
591 |
+ |
assertFalse(q.removeFirstOccurrence(null)); |
592 |
+ |
assertFalse(q.removeFirstOccurrence(42)); |
593 |
|
} |
594 |
|
|
595 |
|
/** |
596 |
|
* removeLastOccurrence(x) removes x and returns true if present |
597 |
|
*/ |
598 |
|
public void testRemoveLastOccurrence() { |
599 |
< |
ArrayDeque q = populatedDeque(SIZE); |
600 |
< |
for (int i = 1; i < SIZE; i+=2) { |
601 |
< |
assertTrue(q.removeLastOccurrence(new Integer(i))); |
602 |
< |
} |
603 |
< |
for (int i = 0; i < SIZE; i+=2) { |
604 |
< |
assertTrue(q.removeLastOccurrence(new Integer(i))); |
605 |
< |
assertFalse(q.removeLastOccurrence(new Integer(i+1))); |
599 |
> |
Deque<Integer> q = populatedDeque(SIZE); |
600 |
> |
assertFalse(q.removeLastOccurrence(null)); |
601 |
> |
for (int i = 1; i < SIZE; i += 2) { |
602 |
> |
assertTrue(q.removeLastOccurrence(i)); |
603 |
> |
assertFalse(q.contains(i)); |
604 |
> |
} |
605 |
> |
for (int i = 0; i < SIZE; i += 2) { |
606 |
> |
assertTrue(q.removeLastOccurrence(i)); |
607 |
> |
assertFalse(q.removeLastOccurrence(i + 1)); |
608 |
> |
assertFalse(q.contains(i)); |
609 |
> |
assertFalse(q.contains(i + 1)); |
610 |
|
} |
611 |
|
assertTrue(q.isEmpty()); |
612 |
+ |
assertFalse(q.removeLastOccurrence(null)); |
613 |
+ |
assertFalse(q.removeLastOccurrence(42)); |
614 |
+ |
q = new ArrayDeque(); |
615 |
+ |
assertFalse(q.removeLastOccurrence(null)); |
616 |
+ |
assertFalse(q.removeLastOccurrence(42)); |
617 |
|
} |
618 |
|
|
619 |
|
/** |
623 |
|
ArrayDeque q = populatedDeque(SIZE); |
624 |
|
for (int i = 0; i < SIZE; ++i) { |
625 |
|
assertTrue(q.contains(new Integer(i))); |
626 |
< |
q.pollFirst(); |
626 |
> |
assertEquals(i, q.pollFirst()); |
627 |
|
assertFalse(q.contains(new Integer(i))); |
628 |
|
} |
629 |
|
} |
636 |
|
q.clear(); |
637 |
|
assertTrue(q.isEmpty()); |
638 |
|
assertEquals(0, q.size()); |
639 |
< |
q.add(new Integer(1)); |
639 |
> |
assertTrue(q.add(new Integer(1))); |
640 |
|
assertFalse(q.isEmpty()); |
641 |
|
q.clear(); |
642 |
|
assertTrue(q.isEmpty()); |
651 |
|
for (int i = 0; i < SIZE; ++i) { |
652 |
|
assertTrue(q.containsAll(p)); |
653 |
|
assertFalse(p.containsAll(q)); |
654 |
< |
p.add(new Integer(i)); |
654 |
> |
assertTrue(p.add(new Integer(i))); |
655 |
|
} |
656 |
|
assertTrue(p.containsAll(q)); |
657 |
|
} |
664 |
|
ArrayDeque p = populatedDeque(SIZE); |
665 |
|
for (int i = 0; i < SIZE; ++i) { |
666 |
|
boolean changed = q.retainAll(p); |
667 |
< |
if (i == 0) |
422 |
< |
assertFalse(changed); |
423 |
< |
else |
424 |
< |
assertTrue(changed); |
425 |
< |
|
667 |
> |
assertEquals(changed, (i > 0)); |
668 |
|
assertTrue(q.containsAll(p)); |
669 |
< |
assertEquals(SIZE-i, q.size()); |
669 |
> |
assertEquals(SIZE - i, q.size()); |
670 |
|
p.removeFirst(); |
671 |
|
} |
672 |
|
} |
679 |
|
ArrayDeque q = populatedDeque(SIZE); |
680 |
|
ArrayDeque p = populatedDeque(i); |
681 |
|
assertTrue(q.removeAll(p)); |
682 |
< |
assertEquals(SIZE-i, q.size()); |
682 |
> |
assertEquals(SIZE - i, q.size()); |
683 |
|
for (int j = 0; j < i; ++j) { |
684 |
< |
Integer I = (Integer)(p.removeFirst()); |
443 |
< |
assertFalse(q.contains(I)); |
684 |
> |
assertFalse(q.contains(p.removeFirst())); |
685 |
|
} |
686 |
|
} |
687 |
|
} |
688 |
|
|
689 |
< |
/** |
690 |
< |
* toArray contains all elements |
691 |
< |
*/ |
692 |
< |
public void testToArray() { |
693 |
< |
ArrayDeque q = populatedDeque(SIZE); |
694 |
< |
Object[] o = q.toArray(); |
695 |
< |
Arrays.sort(o); |
696 |
< |
for (int i = 0; i < o.length; i++) |
697 |
< |
assertEquals(o[i], q.pollFirst()); |
689 |
> |
void checkToArray(ArrayDeque<Integer> q) { |
690 |
> |
int size = q.size(); |
691 |
> |
Object[] a1 = q.toArray(); |
692 |
> |
assertEquals(size, a1.length); |
693 |
> |
Integer[] a2 = q.toArray(new Integer[0]); |
694 |
> |
assertEquals(size, a2.length); |
695 |
> |
Integer[] a3 = q.toArray(new Integer[Math.max(0, size - 1)]); |
696 |
> |
assertEquals(size, a3.length); |
697 |
> |
Integer[] a4 = new Integer[size]; |
698 |
> |
assertSame(a4, q.toArray(a4)); |
699 |
> |
Integer[] a5 = new Integer[size + 1]; |
700 |
> |
Arrays.fill(a5, 42); |
701 |
> |
assertSame(a5, q.toArray(a5)); |
702 |
> |
Integer[] a6 = new Integer[size + 2]; |
703 |
> |
Arrays.fill(a6, 42); |
704 |
> |
assertSame(a6, q.toArray(a6)); |
705 |
> |
Object[][] as = { a1, a2, a3, a4, a5, a6 }; |
706 |
> |
for (Object[] a : as) { |
707 |
> |
if (a.length > size) assertNull(a[size]); |
708 |
> |
if (a.length > size + 1) assertEquals(42, a[size + 1]); |
709 |
> |
} |
710 |
> |
Iterator it = q.iterator(); |
711 |
> |
Integer s = q.peekFirst(); |
712 |
> |
for (int i = 0; i < size; i++) { |
713 |
> |
Integer x = (Integer) it.next(); |
714 |
> |
assertEquals(s + i, (int) x); |
715 |
> |
for (Object[] a : as) |
716 |
> |
assertSame(a1[i], x); |
717 |
> |
} |
718 |
|
} |
719 |
|
|
720 |
|
/** |
721 |
< |
* toArray(a) contains all elements |
721 |
> |
* toArray() and toArray(a) contain all elements in FIFO order |
722 |
|
*/ |
723 |
< |
public void testToArray2() { |
724 |
< |
ArrayDeque q = populatedDeque(SIZE); |
725 |
< |
Integer[] ints = new Integer[SIZE]; |
726 |
< |
ints = (Integer[])q.toArray(ints); |
727 |
< |
Arrays.sort(ints); |
728 |
< |
for (int i = 0; i < ints.length; i++) |
729 |
< |
assertEquals(ints[i], q.pollFirst()); |
723 |
> |
public void testToArray() { |
724 |
> |
final int size = ThreadLocalRandom.current().nextInt(10); |
725 |
> |
ArrayDeque<Integer> q = new ArrayDeque<>(size); |
726 |
> |
for (int i = 0; i < size; i++) { |
727 |
> |
checkToArray(q); |
728 |
> |
q.addLast(i); |
729 |
> |
} |
730 |
> |
// Provoke wraparound |
731 |
> |
int added = size * 2; |
732 |
> |
for (int i = 0; i < added; i++) { |
733 |
> |
checkToArray(q); |
734 |
> |
assertEquals((Integer) i, q.poll()); |
735 |
> |
q.addLast(size + i); |
736 |
> |
} |
737 |
> |
for (int i = 0; i < size; i++) { |
738 |
> |
checkToArray(q); |
739 |
> |
assertEquals((Integer) (added + i), q.poll()); |
740 |
> |
} |
741 |
|
} |
742 |
|
|
743 |
|
/** |
744 |
< |
* toArray(null) throws NPE |
744 |
> |
* toArray(null) throws NullPointerException |
745 |
|
*/ |
746 |
< |
public void testToArray_BadArg() { |
747 |
< |
try { |
748 |
< |
ArrayDeque l = new ArrayDeque(); |
749 |
< |
l.add(new Object()); |
750 |
< |
Object o[] = l.toArray(null); |
751 |
< |
shouldThrow(); |
752 |
< |
} catch (NullPointerException success) {} |
746 |
> |
public void testToArray_NullArg() { |
747 |
> |
ArrayDeque l = new ArrayDeque(); |
748 |
> |
l.add(new Object()); |
749 |
> |
try { |
750 |
> |
l.toArray(null); |
751 |
> |
shouldThrow(); |
752 |
> |
} catch (NullPointerException success) {} |
753 |
|
} |
754 |
|
|
755 |
|
/** |
756 |
< |
* toArray with incompatable aray type throws CCE |
756 |
> |
* toArray(incompatible array type) throws ArrayStoreException |
757 |
|
*/ |
758 |
< |
public void testToArray1_BadArg() { |
759 |
< |
try { |
760 |
< |
ArrayDeque l = new ArrayDeque(); |
761 |
< |
l.add(new Integer(5)); |
762 |
< |
Object o[] = l.toArray(new String[10] ); |
763 |
< |
shouldThrow(); |
764 |
< |
} catch (ArrayStoreException success) {} |
758 |
> |
public void testToArray_incompatibleArrayType() { |
759 |
> |
ArrayDeque l = new ArrayDeque(); |
760 |
> |
l.add(new Integer(5)); |
761 |
> |
try { |
762 |
> |
l.toArray(new String[10]); |
763 |
> |
shouldThrow(); |
764 |
> |
} catch (ArrayStoreException success) {} |
765 |
> |
try { |
766 |
> |
l.toArray(new String[0]); |
767 |
> |
shouldThrow(); |
768 |
> |
} catch (ArrayStoreException success) {} |
769 |
|
} |
770 |
|
|
771 |
|
/** |
772 |
< |
* iterator iterates through all elements |
772 |
> |
* Iterator iterates through all elements |
773 |
|
*/ |
774 |
|
public void testIterator() { |
775 |
|
ArrayDeque q = populatedDeque(SIZE); |
776 |
< |
int i = 0; |
777 |
< |
Iterator it = q.iterator(); |
778 |
< |
while (it.hasNext()) { |
776 |
> |
Iterator it = q.iterator(); |
777 |
> |
int i; |
778 |
> |
for (i = 0; it.hasNext(); i++) |
779 |
|
assertTrue(q.contains(it.next())); |
504 |
– |
++i; |
505 |
– |
} |
780 |
|
assertEquals(i, SIZE); |
781 |
+ |
assertIteratorExhausted(it); |
782 |
+ |
} |
783 |
+ |
|
784 |
+ |
/** |
785 |
+ |
* iterator of empty collection has no elements |
786 |
+ |
*/ |
787 |
+ |
public void testEmptyIterator() { |
788 |
+ |
Deque c = new ArrayDeque(); |
789 |
+ |
assertIteratorExhausted(c.iterator()); |
790 |
+ |
assertIteratorExhausted(c.descendingIterator()); |
791 |
|
} |
792 |
|
|
793 |
|
/** |
794 |
< |
* iterator ordering is FIFO |
794 |
> |
* Iterator ordering is FIFO |
795 |
|
*/ |
796 |
|
public void testIteratorOrdering() { |
797 |
|
final ArrayDeque q = new ArrayDeque(); |
798 |
< |
q.add(new Integer(1)); |
799 |
< |
q.add(new Integer(2)); |
800 |
< |
q.add(new Integer(3)); |
798 |
> |
q.add(one); |
799 |
> |
q.add(two); |
800 |
> |
q.add(three); |
801 |
|
int k = 0; |
802 |
|
for (Iterator it = q.iterator(); it.hasNext();) { |
803 |
< |
int i = ((Integer)(it.next())).intValue(); |
520 |
< |
assertEquals(++k, i); |
803 |
> |
assertEquals(++k, it.next()); |
804 |
|
} |
805 |
|
|
806 |
|
assertEquals(3, k); |
807 |
|
} |
808 |
|
|
809 |
|
/** |
810 |
< |
* iterator.remove removes current element |
810 |
> |
* iterator.remove() removes current element |
811 |
|
*/ |
812 |
< |
public void testIteratorRemove () { |
812 |
> |
public void testIteratorRemove() { |
813 |
|
final ArrayDeque q = new ArrayDeque(); |
814 |
|
final Random rng = new Random(); |
815 |
|
for (int iters = 0; iters < 100; ++iters) { |
816 |
|
int max = rng.nextInt(5) + 2; |
817 |
< |
int split = rng.nextInt(max-1) + 1; |
817 |
> |
int split = rng.nextInt(max - 1) + 1; |
818 |
|
for (int j = 1; j <= max; ++j) |
819 |
|
q.add(new Integer(j)); |
820 |
|
Iterator it = q.iterator(); |
821 |
|
for (int j = 1; j <= split; ++j) |
822 |
|
assertEquals(it.next(), new Integer(j)); |
823 |
|
it.remove(); |
824 |
< |
assertEquals(it.next(), new Integer(split+1)); |
824 |
> |
assertEquals(it.next(), new Integer(split + 1)); |
825 |
|
for (int j = 1; j <= split; ++j) |
826 |
|
q.remove(new Integer(j)); |
827 |
|
it = q.iterator(); |
828 |
< |
for (int j = split+1; j <= max; ++j) { |
828 |
> |
for (int j = split + 1; j <= max; ++j) { |
829 |
|
assertEquals(it.next(), new Integer(j)); |
830 |
|
it.remove(); |
831 |
|
} |
835 |
|
} |
836 |
|
|
837 |
|
/** |
838 |
< |
* Descending iterator iterates through all elements |
838 |
> |
* Descending iterator iterates through all elements |
839 |
|
*/ |
840 |
|
public void testDescendingIterator() { |
841 |
|
ArrayDeque q = populatedDeque(SIZE); |
842 |
|
int i = 0; |
843 |
< |
Iterator it = q.descendingIterator(); |
843 |
> |
Iterator it = q.descendingIterator(); |
844 |
|
while (it.hasNext()) { |
845 |
|
assertTrue(q.contains(it.next())); |
846 |
|
++i; |
849 |
|
assertFalse(it.hasNext()); |
850 |
|
try { |
851 |
|
it.next(); |
852 |
< |
} catch (NoSuchElementException success) { |
853 |
< |
} |
852 |
> |
shouldThrow(); |
853 |
> |
} catch (NoSuchElementException success) {} |
854 |
|
} |
855 |
|
|
856 |
|
/** |
857 |
< |
* Descending iterator ordering is reverse FIFO |
857 |
> |
* Descending iterator ordering is reverse FIFO |
858 |
|
*/ |
859 |
|
public void testDescendingIteratorOrdering() { |
860 |
|
final ArrayDeque q = new ArrayDeque(); |
864 |
|
q.add(new Integer(1)); |
865 |
|
int k = 0; |
866 |
|
for (Iterator it = q.descendingIterator(); it.hasNext();) { |
867 |
< |
int i = ((Integer)(it.next())).intValue(); |
585 |
< |
assertEquals(++k, i); |
867 |
> |
assertEquals(++k, it.next()); |
868 |
|
} |
869 |
|
|
870 |
|
assertEquals(3, k); |
875 |
|
} |
876 |
|
|
877 |
|
/** |
878 |
< |
* descendingIterator.remove removes current element |
878 |
> |
* descendingIterator.remove() removes current element |
879 |
|
*/ |
880 |
< |
public void testDescendingIteratorRemove () { |
880 |
> |
public void testDescendingIteratorRemove() { |
881 |
|
final ArrayDeque q = new ArrayDeque(); |
882 |
|
final Random rng = new Random(); |
883 |
|
for (int iters = 0; iters < 100; ++iters) { |
884 |
|
int max = rng.nextInt(5) + 2; |
885 |
< |
int split = rng.nextInt(max-1) + 1; |
885 |
> |
int split = rng.nextInt(max - 1) + 1; |
886 |
|
for (int j = max; j >= 1; --j) |
887 |
|
q.add(new Integer(j)); |
888 |
|
Iterator it = q.descendingIterator(); |
889 |
|
for (int j = 1; j <= split; ++j) |
890 |
|
assertEquals(it.next(), new Integer(j)); |
891 |
|
it.remove(); |
892 |
< |
assertEquals(it.next(), new Integer(split+1)); |
892 |
> |
assertEquals(it.next(), new Integer(split + 1)); |
893 |
|
for (int j = 1; j <= split; ++j) |
894 |
|
q.remove(new Integer(j)); |
895 |
|
it = q.descendingIterator(); |
896 |
< |
for (int j = split+1; j <= max; ++j) { |
896 |
> |
for (int j = split + 1; j <= max; ++j) { |
897 |
|
assertEquals(it.next(), new Integer(j)); |
898 |
|
it.remove(); |
899 |
|
} |
902 |
|
} |
903 |
|
} |
904 |
|
|
623 |
– |
|
905 |
|
/** |
906 |
< |
* toString contains toStrings of elements |
906 |
> |
* toString() contains toStrings of elements |
907 |
|
*/ |
908 |
|
public void testToString() { |
909 |
|
ArrayDeque q = populatedDeque(SIZE); |
910 |
|
String s = q.toString(); |
911 |
|
for (int i = 0; i < SIZE; ++i) { |
912 |
< |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
912 |
> |
assertTrue(s.contains(String.valueOf(i))); |
913 |
|
} |
914 |
|
} |
915 |
|
|
916 |
|
/** |
917 |
< |
* peekFirst returns element inserted with addFirst |
917 |
> |
* A deserialized serialized deque has same elements in same order |
918 |
|
*/ |
919 |
< |
public void testAddFirst() { |
920 |
< |
ArrayDeque q = populatedDeque(3); |
921 |
< |
q.addFirst(four); |
922 |
< |
assertEquals(four,q.peekFirst()); |
919 |
> |
public void testSerialization() throws Exception { |
920 |
> |
Queue x = populatedDeque(SIZE); |
921 |
> |
Queue y = serialClone(x); |
922 |
> |
|
923 |
> |
assertNotSame(y, x); |
924 |
> |
assertEquals(x.size(), y.size()); |
925 |
> |
assertEquals(x.toString(), y.toString()); |
926 |
> |
assertEquals(Arrays.toString(x.toArray()), Arrays.toString(y.toArray())); |
927 |
> |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
928 |
> |
while (!x.isEmpty()) { |
929 |
> |
assertFalse(y.isEmpty()); |
930 |
> |
assertEquals(x.remove(), y.remove()); |
931 |
> |
} |
932 |
> |
assertTrue(y.isEmpty()); |
933 |
|
} |
934 |
|
|
935 |
|
/** |
936 |
< |
* peekLast returns element inserted with addLast |
936 |
> |
* A cloned deque has same elements in same order |
937 |
|
*/ |
938 |
< |
public void testAddLast() { |
939 |
< |
ArrayDeque q = populatedDeque(3); |
940 |
< |
q.addLast(four); |
941 |
< |
assertEquals(four,q.peekLast()); |
938 |
> |
public void testClone() throws Exception { |
939 |
> |
ArrayDeque<Integer> x = populatedDeque(SIZE); |
940 |
> |
ArrayDeque<Integer> y = x.clone(); |
941 |
> |
|
942 |
> |
assertNotSame(y, x); |
943 |
> |
assertEquals(x.size(), y.size()); |
944 |
> |
assertEquals(x.toString(), y.toString()); |
945 |
> |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
946 |
> |
while (!x.isEmpty()) { |
947 |
> |
assertFalse(y.isEmpty()); |
948 |
> |
assertEquals(x.remove(), y.remove()); |
949 |
> |
} |
950 |
> |
assertTrue(y.isEmpty()); |
951 |
> |
} |
952 |
> |
|
953 |
> |
/** |
954 |
> |
* remove(null), contains(null) always return false |
955 |
> |
*/ |
956 |
> |
public void testNeverContainsNull() { |
957 |
> |
Deque<?>[] qs = { |
958 |
> |
new ArrayDeque<Object>(), |
959 |
> |
populatedDeque(2), |
960 |
> |
}; |
961 |
> |
|
962 |
> |
for (Deque<?> q : qs) { |
963 |
> |
assertFalse(q.contains(null)); |
964 |
> |
assertFalse(q.remove(null)); |
965 |
> |
assertFalse(q.removeFirstOccurrence(null)); |
966 |
> |
assertFalse(q.removeLastOccurrence(null)); |
967 |
> |
} |
968 |
|
} |
969 |
|
|
970 |
|
} |