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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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* 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 java.util.ArrayDeque; |
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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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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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* Returns a new deque of given size containing consecutive |
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* Integers 0 ... n. |
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* Integers 0 ... n - 1. |
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*/ |
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private ArrayDeque<Integer> populatedDeque(int n) { |
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ArrayDeque<Integer> q = new ArrayDeque<Integer>(); |
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> |
private static ArrayDeque<Integer> populatedDeque(int n) { |
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// Randomize various aspects of memory layout, including |
45 |
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// filled-to-capacity and wraparound. |
46 |
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final ArrayDeque<Integer> q; |
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ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
48 |
> |
switch (rnd.nextInt(6)) { |
49 |
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case 0: q = new ArrayDeque<Integer>(); break; |
50 |
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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(); |
56 |
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} |
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switch (rnd.nextInt(3)) { |
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case 0: |
59 |
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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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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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*/ |
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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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} catch (NullPointerException success) {} |
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} |
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*/ |
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public void testConstructor4() { |
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try { |
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Integer[] ints = new Integer[SIZE]; |
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ArrayDeque q = new ArrayDeque(Arrays.asList(ints)); |
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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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* Initializing from Collection with some null elements throws NPE |
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*/ |
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public void testConstructor5() { |
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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 { |
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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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ArrayDeque q = new ArrayDeque(Arrays.asList(ints)); |
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new ArrayDeque(Arrays.asList(ints)); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
154 |
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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) { |
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assertEquals(SIZE-i, q.size()); |
157 |
> |
assertEquals(SIZE - i, q.size()); |
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q.removeFirst(); |
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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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*/ |
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public void testPushNull() { |
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ArrayDeque q = new ArrayDeque(1); |
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try { |
129 |
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ArrayDeque q = new ArrayDeque(1); |
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q.push(null); |
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shouldThrow(); |
174 |
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} catch (NullPointerException success) {} |
202 |
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* offer(null) throws NPE |
203 |
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*/ |
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public void testOfferNull() { |
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ArrayDeque q = new ArrayDeque(); |
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try { |
164 |
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ArrayDeque q = new ArrayDeque(); |
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q.offer(null); |
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shouldThrow(); |
209 |
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} catch (NullPointerException success) {} |
213 |
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* offerFirst(null) throws NPE |
214 |
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*/ |
215 |
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public void testOfferFirstNull() { |
216 |
+ |
ArrayDeque q = new ArrayDeque(); |
217 |
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try { |
175 |
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ArrayDeque q = new ArrayDeque(); |
218 |
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q.offerFirst(null); |
219 |
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shouldThrow(); |
220 |
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} catch (NullPointerException success) {} |
224 |
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* offerLast(null) throws NPE |
225 |
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*/ |
226 |
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public void testOfferLastNull() { |
227 |
+ |
ArrayDeque q = new ArrayDeque(); |
228 |
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try { |
186 |
– |
ArrayDeque q = new ArrayDeque(); |
229 |
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q.offerLast(null); |
230 |
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shouldThrow(); |
231 |
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} catch (NullPointerException success) {} |
268 |
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* add(null) throws NPE |
269 |
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*/ |
270 |
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public void testAddNull() { |
271 |
+ |
ArrayDeque q = new ArrayDeque(); |
272 |
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try { |
230 |
– |
ArrayDeque q = new ArrayDeque(); |
273 |
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q.add(null); |
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shouldThrow(); |
275 |
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} catch (NullPointerException success) {} |
279 |
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* addFirst(null) throws NPE |
280 |
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*/ |
281 |
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public void testAddFirstNull() { |
282 |
+ |
ArrayDeque q = new ArrayDeque(); |
283 |
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try { |
241 |
– |
ArrayDeque q = new ArrayDeque(); |
284 |
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q.addFirst(null); |
285 |
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shouldThrow(); |
286 |
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} catch (NullPointerException success) {} |
290 |
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* addLast(null) throws NPE |
291 |
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*/ |
292 |
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public void testAddLastNull() { |
293 |
+ |
ArrayDeque q = new ArrayDeque(); |
294 |
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try { |
252 |
– |
ArrayDeque q = new ArrayDeque(); |
295 |
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q.addLast(null); |
296 |
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shouldThrow(); |
297 |
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} catch (NullPointerException success) {} |
334 |
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* addAll(null) throws NPE |
335 |
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*/ |
336 |
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public void testAddAll1() { |
337 |
+ |
ArrayDeque q = new ArrayDeque(); |
338 |
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try { |
296 |
– |
ArrayDeque q = new ArrayDeque(); |
339 |
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q.addAll(null); |
340 |
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shouldThrow(); |
341 |
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} catch (NullPointerException success) {} |
345 |
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* addAll of a collection with null elements throws NPE |
346 |
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*/ |
347 |
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public void testAddAll2() { |
348 |
+ |
ArrayDeque q = new ArrayDeque(); |
349 |
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try { |
350 |
< |
ArrayDeque q = new ArrayDeque(); |
308 |
< |
Integer[] ints = new Integer[SIZE]; |
309 |
< |
q.addAll(Arrays.asList(ints)); |
350 |
> |
q.addAll(Arrays.asList(new Integer[SIZE])); |
351 |
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shouldThrow(); |
352 |
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} catch (NullPointerException success) {} |
353 |
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} |
357 |
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* possibly adding some elements |
358 |
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*/ |
359 |
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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 |
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try { |
320 |
– |
ArrayDeque q = new ArrayDeque(); |
321 |
– |
Integer[] ints = new Integer[SIZE]; |
322 |
– |
for (int i = 0; i < SIZE-1; ++i) |
323 |
– |
ints[i] = new Integer(i); |
365 |
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q.addAll(Arrays.asList(ints)); |
366 |
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shouldThrow(); |
367 |
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} catch (NullPointerException success) {} |
398 |
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*/ |
399 |
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public void testPollLast() { |
400 |
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ArrayDeque q = populatedDeque(SIZE); |
401 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
401 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
402 |
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assertEquals(i, q.pollLast()); |
403 |
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} |
404 |
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assertNull(q.pollLast()); |
438 |
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assertTrue(q.contains(i)); |
439 |
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assertTrue(q.remove(i)); |
440 |
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assertFalse(q.contains(i)); |
441 |
< |
assertTrue(q.contains(i-1)); |
441 |
> |
assertTrue(q.contains(i - 1)); |
442 |
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} |
443 |
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for (int i = 0; i < SIZE; i += 2) { |
444 |
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assertTrue(q.contains(i)); |
445 |
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assertTrue(q.remove(i)); |
446 |
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assertFalse(q.contains(i)); |
447 |
< |
assertFalse(q.remove(i+1)); |
448 |
< |
assertFalse(q.contains(i+1)); |
447 |
> |
assertFalse(q.remove(i + 1)); |
448 |
> |
assertFalse(q.contains(i + 1)); |
449 |
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} |
450 |
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assertTrue(q.isEmpty()); |
451 |
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} |
483 |
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*/ |
484 |
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public void testPeekLast() { |
485 |
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ArrayDeque q = populatedDeque(SIZE); |
486 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
486 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
487 |
|
assertEquals(i, q.peekLast()); |
488 |
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assertEquals(i, q.pollLast()); |
489 |
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assertTrue(q.peekLast() == null || |
527 |
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*/ |
528 |
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public void testLastElement() { |
529 |
|
ArrayDeque q = populatedDeque(SIZE); |
530 |
< |
for (int i = SIZE-1; i >= 0; --i) { |
530 |
> |
for (int i = SIZE - 1; i >= 0; --i) { |
531 |
|
assertEquals(i, q.getLast()); |
532 |
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assertEquals(i, q.pollLast()); |
533 |
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} |
573 |
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*/ |
574 |
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public void testRemoveFirstOccurrence() { |
575 |
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ArrayDeque q = populatedDeque(SIZE); |
576 |
+ |
assertFalse(q.removeFirstOccurrence(null)); |
577 |
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for (int i = 1; i < SIZE; i += 2) { |
578 |
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assertTrue(q.removeFirstOccurrence(new Integer(i))); |
579 |
|
} |
580 |
|
for (int i = 0; i < SIZE; i += 2) { |
581 |
|
assertTrue(q.removeFirstOccurrence(new Integer(i))); |
582 |
< |
assertFalse(q.removeFirstOccurrence(new Integer(i+1))); |
582 |
> |
assertFalse(q.removeFirstOccurrence(new Integer(i + 1))); |
583 |
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} |
584 |
|
assertTrue(q.isEmpty()); |
585 |
+ |
assertFalse(q.removeFirstOccurrence(null)); |
586 |
+ |
assertFalse(q.removeFirstOccurrence(42)); |
587 |
+ |
q = new ArrayDeque(); |
588 |
+ |
assertFalse(q.removeFirstOccurrence(null)); |
589 |
+ |
assertFalse(q.removeFirstOccurrence(42)); |
590 |
|
} |
591 |
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|
592 |
|
/** |
594 |
|
*/ |
595 |
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public void testRemoveLastOccurrence() { |
596 |
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ArrayDeque q = populatedDeque(SIZE); |
597 |
+ |
assertFalse(q.removeLastOccurrence(null)); |
598 |
|
for (int i = 1; i < SIZE; i += 2) { |
599 |
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assertTrue(q.removeLastOccurrence(new Integer(i))); |
600 |
|
} |
601 |
|
for (int i = 0; i < SIZE; i += 2) { |
602 |
|
assertTrue(q.removeLastOccurrence(new Integer(i))); |
603 |
< |
assertFalse(q.removeLastOccurrence(new Integer(i+1))); |
603 |
> |
assertFalse(q.removeLastOccurrence(new Integer(i + 1))); |
604 |
|
} |
605 |
|
assertTrue(q.isEmpty()); |
606 |
+ |
assertFalse(q.removeLastOccurrence(null)); |
607 |
+ |
assertFalse(q.removeLastOccurrence(42)); |
608 |
+ |
q = new ArrayDeque(); |
609 |
+ |
assertFalse(q.removeLastOccurrence(null)); |
610 |
+ |
assertFalse(q.removeLastOccurrence(42)); |
611 |
|
} |
612 |
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|
613 |
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/** |
660 |
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boolean changed = q.retainAll(p); |
661 |
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assertEquals(changed, (i > 0)); |
662 |
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assertTrue(q.containsAll(p)); |
663 |
< |
assertEquals(SIZE-i, q.size()); |
663 |
> |
assertEquals(SIZE - i, q.size()); |
664 |
|
p.removeFirst(); |
665 |
|
} |
666 |
|
} |
673 |
|
ArrayDeque q = populatedDeque(SIZE); |
674 |
|
ArrayDeque p = populatedDeque(i); |
675 |
|
assertTrue(q.removeAll(p)); |
676 |
< |
assertEquals(SIZE-i, q.size()); |
676 |
> |
assertEquals(SIZE - i, q.size()); |
677 |
|
for (int j = 0; j < i; ++j) { |
678 |
|
assertFalse(q.contains(p.removeFirst())); |
679 |
|
} |
705 |
|
for (int i = 0; i < SIZE; i++) { |
706 |
|
checkToArray(q); |
707 |
|
assertEquals(i, q.poll()); |
708 |
< |
q.addLast(SIZE+i); |
708 |
> |
q.addLast(SIZE + i); |
709 |
|
} |
710 |
|
for (int i = 0; i < SIZE; i++) { |
711 |
|
checkToArray(q); |
712 |
< |
assertEquals(SIZE+i, q.poll()); |
712 |
> |
assertEquals(SIZE + i, q.poll()); |
713 |
|
} |
714 |
|
} |
715 |
|
|
716 |
|
void checkToArray2(ArrayDeque q) { |
717 |
|
int size = q.size(); |
718 |
< |
Integer[] a1 = size == 0 ? null : new Integer[size-1]; |
718 |
> |
Integer[] a1 = (size == 0) ? null : new Integer[size - 1]; |
719 |
|
Integer[] a2 = new Integer[size]; |
720 |
< |
Integer[] a3 = new Integer[size+2]; |
720 |
> |
Integer[] a3 = new Integer[size + 2]; |
721 |
|
if (size > 0) Arrays.fill(a1, 42); |
722 |
|
Arrays.fill(a2, 42); |
723 |
|
Arrays.fill(a3, 42); |
724 |
< |
Integer[] b1 = size == 0 ? null : (Integer[]) q.toArray(a1); |
724 |
> |
Integer[] b1 = (size == 0) ? null : (Integer[]) q.toArray(a1); |
725 |
|
Integer[] b2 = (Integer[]) q.toArray(a2); |
726 |
|
Integer[] b3 = (Integer[]) q.toArray(a3); |
727 |
|
assertSame(a2, b2); |
735 |
|
assertSame(b3[i], x); |
736 |
|
} |
737 |
|
assertNull(a3[size]); |
738 |
< |
assertEquals(42, (int) a3[size+1]); |
738 |
> |
assertEquals(42, (int) a3[size + 1]); |
739 |
|
if (size > 0) { |
740 |
|
assertNotSame(a1, b1); |
741 |
|
assertEquals(size, b1.length); |
758 |
|
for (int i = 0; i < SIZE; i++) { |
759 |
|
checkToArray2(q); |
760 |
|
assertEquals(i, q.poll()); |
761 |
< |
q.addLast(SIZE+i); |
761 |
> |
q.addLast(SIZE + i); |
762 |
|
} |
763 |
|
for (int i = 0; i < SIZE; i++) { |
764 |
|
checkToArray2(q); |
765 |
< |
assertEquals(SIZE+i, q.poll()); |
765 |
> |
assertEquals(SIZE + i, q.poll()); |
766 |
|
} |
767 |
|
} |
768 |
|
|
836 |
|
final Random rng = new Random(); |
837 |
|
for (int iters = 0; iters < 100; ++iters) { |
838 |
|
int max = rng.nextInt(5) + 2; |
839 |
< |
int split = rng.nextInt(max-1) + 1; |
839 |
> |
int split = rng.nextInt(max - 1) + 1; |
840 |
|
for (int j = 1; j <= max; ++j) |
841 |
|
q.add(new Integer(j)); |
842 |
|
Iterator it = q.iterator(); |
843 |
|
for (int j = 1; j <= split; ++j) |
844 |
|
assertEquals(it.next(), new Integer(j)); |
845 |
|
it.remove(); |
846 |
< |
assertEquals(it.next(), new Integer(split+1)); |
846 |
> |
assertEquals(it.next(), new Integer(split + 1)); |
847 |
|
for (int j = 1; j <= split; ++j) |
848 |
|
q.remove(new Integer(j)); |
849 |
|
it = q.iterator(); |
850 |
< |
for (int j = split+1; j <= max; ++j) { |
850 |
> |
for (int j = split + 1; j <= max; ++j) { |
851 |
|
assertEquals(it.next(), new Integer(j)); |
852 |
|
it.remove(); |
853 |
|
} |
904 |
|
final Random rng = new Random(); |
905 |
|
for (int iters = 0; iters < 100; ++iters) { |
906 |
|
int max = rng.nextInt(5) + 2; |
907 |
< |
int split = rng.nextInt(max-1) + 1; |
907 |
> |
int split = rng.nextInt(max - 1) + 1; |
908 |
|
for (int j = max; j >= 1; --j) |
909 |
|
q.add(new Integer(j)); |
910 |
|
Iterator it = q.descendingIterator(); |
911 |
|
for (int j = 1; j <= split; ++j) |
912 |
|
assertEquals(it.next(), new Integer(j)); |
913 |
|
it.remove(); |
914 |
< |
assertEquals(it.next(), new Integer(split+1)); |
914 |
> |
assertEquals(it.next(), new Integer(split + 1)); |
915 |
|
for (int j = 1; j <= split; ++j) |
916 |
|
q.remove(new Integer(j)); |
917 |
|
it = q.descendingIterator(); |
918 |
< |
for (int j = split+1; j <= max; ++j) { |
918 |
> |
for (int j = split + 1; j <= max; ++j) { |
919 |
|
assertEquals(it.next(), new Integer(j)); |
920 |
|
it.remove(); |
921 |
|
} |
954 |
|
} |
955 |
|
|
956 |
|
/** |
957 |
+ |
* A cloned deque has same elements in same order |
958 |
+ |
*/ |
959 |
+ |
public void testClone() throws Exception { |
960 |
+ |
ArrayDeque<Integer> x = populatedDeque(SIZE); |
961 |
+ |
ArrayDeque<Integer> y = x.clone(); |
962 |
+ |
|
963 |
+ |
assertNotSame(y, x); |
964 |
+ |
assertEquals(x.size(), y.size()); |
965 |
+ |
assertEquals(x.toString(), y.toString()); |
966 |
+ |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
967 |
+ |
while (!x.isEmpty()) { |
968 |
+ |
assertFalse(y.isEmpty()); |
969 |
+ |
assertEquals(x.remove(), y.remove()); |
970 |
+ |
} |
971 |
+ |
assertTrue(y.isEmpty()); |
972 |
+ |
} |
973 |
+ |
|
974 |
+ |
/** |
975 |
|
* remove(null), contains(null) always return false |
976 |
|
*/ |
977 |
|
public void testNeverContainsNull() { |
988 |
|
} |
989 |
|
} |
990 |
|
|
991 |
+ |
/** |
992 |
+ |
* Handle capacities near Integer.MAX_VALUE. |
993 |
+ |
* ant -Dvmoptions=-Xmx24g -Djsr166.expensiveTests=true -Djsr166.tckTestClass=ArrayDequeTest -Djsr166.methodFilter=testHuge tck |
994 |
+ |
*/ |
995 |
+ |
public void testHuge() { |
996 |
+ |
if (! (testImplementationDetails |
997 |
+ |
&& expensiveTests |
998 |
+ |
&& Runtime.getRuntime().freeMemory() > 21_000_000_000L)) |
999 |
+ |
return; |
1000 |
+ |
int maxSize = Integer.MAX_VALUE - 8; |
1001 |
+ |
ArrayDeque<Integer> q; |
1002 |
+ |
|
1003 |
+ |
q = new ArrayDeque<>(maxSize); |
1004 |
+ |
|
1005 |
+ |
assertThrows(OutOfMemoryError.class, |
1006 |
+ |
() -> new ArrayDeque<>(Integer.MAX_VALUE)); |
1007 |
+ |
|
1008 |
+ |
q = populatedDeque(0); |
1009 |
+ |
q.addAll(Collections.nCopies(maxSize - 2, (Integer) 42)); |
1010 |
+ |
assertEquals((Integer) 42, q.peekFirst()); |
1011 |
+ |
assertEquals((Integer) 42, q.peekLast()); |
1012 |
+ |
assertEquals(maxSize - 2, q.size()); |
1013 |
+ |
q.addFirst((Integer) 0); |
1014 |
+ |
q.addLast((Integer) 1); |
1015 |
+ |
assertEquals((Integer) 0, q.peekFirst()); |
1016 |
+ |
assertEquals((Integer) 1, q.peekLast()); |
1017 |
+ |
assertEquals(maxSize, q.size()); |
1018 |
+ |
} |
1019 |
+ |
|
1020 |
|
} |