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Comparing jsr166/src/test/tck/PriorityQueueTest.java (file contents):
Revision 1.5 by dl, Sat Sep 20 18:20:08 2003 UTC vs.
Revision 1.31 by jsr166, Sun Feb 22 04:34:44 2015 UTC

# Line 1 | Line 1
1   /*
2 < * Written by members of JCP JSR-166 Expert Group and released to the
3 < * public domain. Use, modify, and redistribute this code in any way
4 < * without acknowledgement. Other contributors include Andrew Wright,
5 < * Jeffrey Hayes, Pat Fischer, Mike Judd.
2 > * Written by Doug Lea with assistance from members of JCP JSR-166
3 > * Expert Group and released to the public domain, as explained at
4 > * http://creativecommons.org/publicdomain/zero/1.0/
5 > * Other contributors include Andrew Wright, Jeffrey Hayes,
6 > * Pat Fisher, Mike Judd.
7   */
8  
9 < import junit.framework.*;
10 < import java.util.*;
11 < import java.util.concurrent.*;
12 < import java.io.*;
9 > import java.util.Arrays;
10 > import java.util.Collection;
11 > import java.util.Comparator;
12 > import java.util.Iterator;
13 > import java.util.NoSuchElementException;
14 > import java.util.PriorityQueue;
15 > import java.util.Queue;
16  
17 < public class PriorityQueueTest extends JSR166TestCase {
17 > import junit.framework.Test;
18 > import junit.framework.TestSuite;
19  
20 + public class PriorityQueueTest extends JSR166TestCase {
21      public static void main(String[] args) {
22 <        junit.textui.TestRunner.run (suite());  
22 >        junit.textui.TestRunner.run(suite());
23      }
18
24      public static Test suite() {
25 <        return new TestSuite(PriorityQueueTest.class);
25 >        return new TestSuite(PriorityQueueTest.class);
26      }
27  
28 <    static class MyReverseComparator implements Comparator {
28 >    static class MyReverseComparator implements Comparator {
29          public int compare(Object x, Object y) {
30 <            int i = ((Integer)x).intValue();
26 <            int j = ((Integer)y).intValue();
27 <            if (i < j) return 1;
28 <            if (i > j) return -1;
29 <            return 0;
30 >            return ((Comparable)y).compareTo(x);
31          }
32      }
33  
33
34      /**
35 <     * Create a queue of given size containing consecutive
35 >     * Returns a new queue of given size containing consecutive
36       * Integers 0 ... n.
37       */
38 <    private PriorityQueue populatedQueue(int n) {
39 <        PriorityQueue q = new PriorityQueue(n);
38 >    private PriorityQueue<Integer> populatedQueue(int n) {
39 >        PriorityQueue<Integer> q = new PriorityQueue<Integer>(n);
40          assertTrue(q.isEmpty());
41 <        for(int i = n-1; i >= 0; i-=2)
42 <            assertTrue(q.offer(new Integer(i)));
43 <        for(int i = (n & 1); i < n; i+=2)
44 <            assertTrue(q.offer(new Integer(i)));
41 >        for (int i = n-1; i >= 0; i -= 2)
42 >            assertTrue(q.offer(new Integer(i)));
43 >        for (int i = (n & 1); i < n; i += 2)
44 >            assertTrue(q.offer(new Integer(i)));
45          assertFalse(q.isEmpty());
46 <        assertEquals(n, q.size());
46 >        assertEquals(n, q.size());
47          return q;
48      }
49 <
49 >
50      /**
51 <     *
51 >     * A new queue has unbounded capacity
52       */
53      public void testConstructor1() {
54          assertEquals(0, new PriorityQueue(SIZE).size());
55      }
56  
57      /**
58 <     *
58 >     * Constructor throws IAE if capacity argument nonpositive
59       */
60      public void testConstructor2() {
61          try {
62 <            PriorityQueue q = new PriorityQueue(0);
62 >            new PriorityQueue(0);
63              shouldThrow();
64 <        }
65 <        catch (IllegalArgumentException success) {}
64 >        } catch (IllegalArgumentException success) {}
65      }
66  
67      /**
68 <     *
68 >     * Initializing from null Collection throws NPE
69       */
70      public void testConstructor3() {
72
71          try {
72 <            PriorityQueue q = new PriorityQueue((Collection)null);
72 >            new PriorityQueue((Collection)null);
73              shouldThrow();
74 <        }
77 <        catch (NullPointerException success) {}
74 >        } catch (NullPointerException success) {}
75      }
76  
77      /**
78 <     *
78 >     * Initializing from Collection of null elements throws NPE
79       */
80      public void testConstructor4() {
81          try {
82              Integer[] ints = new Integer[SIZE];
83 <            PriorityQueue q = new PriorityQueue(Arrays.asList(ints));
83 >            new PriorityQueue(Arrays.asList(ints));
84              shouldThrow();
85 <        }
89 <        catch (NullPointerException success) {}
85 >        } catch (NullPointerException success) {}
86      }
87  
88      /**
89 <     *
89 >     * Initializing from Collection with some null elements throws NPE
90       */
91      public void testConstructor5() {
92          try {
93              Integer[] ints = new Integer[SIZE];
94              for (int i = 0; i < SIZE-1; ++i)
95                  ints[i] = new Integer(i);
96 <            PriorityQueue q = new PriorityQueue(Arrays.asList(ints));
96 >            new PriorityQueue(Arrays.asList(ints));
97              shouldThrow();
98 <        }
103 <        catch (NullPointerException success) {}
98 >        } catch (NullPointerException success) {}
99      }
100  
101      /**
102 <     *
102 >     * Queue contains all elements of collection used to initialize
103       */
104      public void testConstructor6() {
105 <        try {
106 <            Integer[] ints = new Integer[SIZE];
107 <            for (int i = 0; i < SIZE; ++i)
108 <                ints[i] = new Integer(i);
109 <            PriorityQueue q = new PriorityQueue(Arrays.asList(ints));
110 <            for (int i = 0; i < SIZE; ++i)
116 <                assertEquals(ints[i], q.poll());
117 <        }
118 <        finally {}
105 >        Integer[] ints = new Integer[SIZE];
106 >        for (int i = 0; i < SIZE; ++i)
107 >            ints[i] = new Integer(i);
108 >        PriorityQueue q = new PriorityQueue(Arrays.asList(ints));
109 >        for (int i = 0; i < SIZE; ++i)
110 >            assertEquals(ints[i], q.poll());
111      }
112  
113      /**
114 <     *
114 >     * The comparator used in constructor is used
115       */
116      public void testConstructor7() {
117 <        try {
118 <            MyReverseComparator cmp = new MyReverseComparator();
119 <            PriorityQueue q = new PriorityQueue(SIZE, cmp);
120 <            assertEquals(cmp, q.comparator());
121 <            Integer[] ints = new Integer[SIZE];
122 <            for (int i = 0; i < SIZE; ++i)
123 <                ints[i] = new Integer(i);
124 <            q.addAll(Arrays.asList(ints));
125 <            for (int i = SIZE-1; i >= 0; --i)
134 <                assertEquals(ints[i], q.poll());
135 <        }
136 <        finally {}
117 >        MyReverseComparator cmp = new MyReverseComparator();
118 >        PriorityQueue q = new PriorityQueue(SIZE, cmp);
119 >        assertEquals(cmp, q.comparator());
120 >        Integer[] ints = new Integer[SIZE];
121 >        for (int i = 0; i < SIZE; ++i)
122 >            ints[i] = new Integer(i);
123 >        q.addAll(Arrays.asList(ints));
124 >        for (int i = SIZE-1; i >= 0; --i)
125 >            assertEquals(ints[i], q.poll());
126      }
127  
128      /**
129 <     *
129 >     * isEmpty is true before add, false after
130       */
131      public void testEmpty() {
132          PriorityQueue q = new PriorityQueue(2);
# Line 151 | Line 140 | public class PriorityQueueTest extends J
140      }
141  
142      /**
143 <     *
143 >     * size changes when elements added and removed
144       */
145      public void testSize() {
146          PriorityQueue q = populatedQueue(SIZE);
# Line 166 | Line 155 | public class PriorityQueueTest extends J
155      }
156  
157      /**
158 <     *
158 >     * offer(null) throws NPE
159       */
160      public void testOfferNull() {
161 <        try {
161 >        try {
162              PriorityQueue q = new PriorityQueue(1);
163              q.offer(null);
164              shouldThrow();
165 <        } catch (NullPointerException success) { }  
165 >        } catch (NullPointerException success) {}
166 >    }
167 >
168 >    /**
169 >     * add(null) throws NPE
170 >     */
171 >    public void testAddNull() {
172 >        try {
173 >            PriorityQueue q = new PriorityQueue(1);
174 >            q.add(null);
175 >            shouldThrow();
176 >        } catch (NullPointerException success) {}
177      }
178  
179      /**
180 <     *
180 >     * Offer of comparable element succeeds
181       */
182      public void testOffer() {
183          PriorityQueue q = new PriorityQueue(1);
184 <        assertTrue(q.offer(new Integer(0)));
185 <        assertTrue(q.offer(new Integer(1)));
184 >        assertTrue(q.offer(zero));
185 >        assertTrue(q.offer(one));
186      }
187  
188      /**
189 <     *
189 >     * Offer of non-Comparable throws CCE
190       */
191      public void testOfferNonComparable() {
192          try {
# Line 195 | Line 195 | public class PriorityQueueTest extends J
195              q.offer(new Object());
196              q.offer(new Object());
197              shouldThrow();
198 <        }
199 <        catch(ClassCastException success) {}
198 >        } catch (ClassCastException success) {}
199      }
200  
201      /**
202 <     *
202 >     * add of comparable succeeds
203       */
204      public void testAdd() {
205          PriorityQueue q = new PriorityQueue(SIZE);
# Line 211 | Line 210 | public class PriorityQueueTest extends J
210      }
211  
212      /**
213 <     *
213 >     * addAll(null) throws NPE
214       */
215      public void testAddAll1() {
216          try {
217              PriorityQueue q = new PriorityQueue(1);
218              q.addAll(null);
219              shouldThrow();
220 <        }
222 <        catch (NullPointerException success) {}
220 >        } catch (NullPointerException success) {}
221      }
222 +
223      /**
224 <     *
224 >     * addAll of a collection with null elements throws NPE
225       */
226      public void testAddAll2() {
227          try {
# Line 230 | Line 229 | public class PriorityQueueTest extends J
229              Integer[] ints = new Integer[SIZE];
230              q.addAll(Arrays.asList(ints));
231              shouldThrow();
232 <        }
234 <        catch (NullPointerException success) {}
232 >        } catch (NullPointerException success) {}
233      }
234 +
235      /**
236 <     *
236 >     * addAll of a collection with any null elements throws NPE after
237 >     * possibly adding some elements
238       */
239      public void testAddAll3() {
240          try {
# Line 244 | Line 244 | public class PriorityQueueTest extends J
244                  ints[i] = new Integer(i);
245              q.addAll(Arrays.asList(ints));
246              shouldThrow();
247 <        }
248 <        catch (NullPointerException success) {}
247 >        } catch (NullPointerException success) {}
248      }
249  
250      /**
251 <     *
251 >     * Queue contains all elements of successful addAll
252       */
253      public void testAddAll5() {
254 <        try {
255 <            Integer[] empty = new Integer[0];
256 <            Integer[] ints = new Integer[SIZE];
257 <            for (int i = 0; i < SIZE; ++i)
258 <                ints[i] = new Integer(SIZE-1-i);
259 <            PriorityQueue q = new PriorityQueue(SIZE);
260 <            assertFalse(q.addAll(Arrays.asList(empty)));
261 <            assertTrue(q.addAll(Arrays.asList(ints)));
262 <            for (int i = 0; i < SIZE; ++i)
264 <                assertEquals(new Integer(i), q.poll());
265 <        }
266 <        finally {}
254 >        Integer[] empty = new Integer[0];
255 >        Integer[] ints = new Integer[SIZE];
256 >        for (int i = 0; i < SIZE; ++i)
257 >            ints[i] = new Integer(SIZE-1-i);
258 >        PriorityQueue q = new PriorityQueue(SIZE);
259 >        assertFalse(q.addAll(Arrays.asList(empty)));
260 >        assertTrue(q.addAll(Arrays.asList(ints)));
261 >        for (int i = 0; i < SIZE; ++i)
262 >            assertEquals(new Integer(i), q.poll());
263      }
264  
265      /**
266 <     *
266 >     * poll succeeds unless empty
267       */
268      public void testPoll() {
269          PriorityQueue q = populatedQueue(SIZE);
270          for (int i = 0; i < SIZE; ++i) {
271 <            assertEquals(i, ((Integer)q.poll()).intValue());
271 >            assertEquals(i, q.poll());
272          }
273 <        assertNull(q.poll());
273 >        assertNull(q.poll());
274      }
275  
276      /**
277 <     *
277 >     * peek returns next element, or null if empty
278       */
279      public void testPeek() {
280          PriorityQueue q = populatedQueue(SIZE);
281          for (int i = 0; i < SIZE; ++i) {
282 <            assertEquals(i, ((Integer)q.peek()).intValue());
283 <            q.poll();
282 >            assertEquals(i, q.peek());
283 >            assertEquals(i, q.poll());
284              assertTrue(q.peek() == null ||
285 <                       i != ((Integer)q.peek()).intValue());
285 >                       !q.peek().equals(i));
286          }
287 <        assertNull(q.peek());
287 >        assertNull(q.peek());
288      }
289  
290      /**
291 <     *
291 >     * element returns next element, or throws NSEE if empty
292       */
293      public void testElement() {
294          PriorityQueue q = populatedQueue(SIZE);
295          for (int i = 0; i < SIZE; ++i) {
296 <            assertEquals(i, ((Integer)q.element()).intValue());
297 <            q.poll();
296 >            assertEquals(i, q.element());
297 >            assertEquals(i, q.poll());
298          }
299          try {
300              q.element();
301              shouldThrow();
302 <        }
307 <        catch (NoSuchElementException success) {}
302 >        } catch (NoSuchElementException success) {}
303      }
304  
305      /**
306 <     *
306 >     * remove removes next element, or throws NSEE if empty
307       */
308      public void testRemove() {
309          PriorityQueue q = populatedQueue(SIZE);
310          for (int i = 0; i < SIZE; ++i) {
311 <            assertEquals(i, ((Integer)q.remove()).intValue());
311 >            assertEquals(i, q.remove());
312          }
313          try {
314              q.remove();
315              shouldThrow();
316 <        } catch (NoSuchElementException success){
322 <        }  
316 >        } catch (NoSuchElementException success) {}
317      }
318  
319      /**
320 <     *
320 >     * remove(x) removes x and returns true if present
321       */
322      public void testRemoveElement() {
323          PriorityQueue q = populatedQueue(SIZE);
324 <        for (int i = 1; i < SIZE; i+=2) {
325 <            assertTrue(q.remove(new Integer(i)));
326 <        }
327 <        for (int i = 0; i < SIZE; i+=2) {
328 <            assertTrue(q.remove(new Integer(i)));
329 <            assertFalse(q.remove(new Integer(i+1)));
324 >        for (int i = 1; i < SIZE; i += 2) {
325 >            assertTrue(q.contains(i));
326 >            assertTrue(q.remove(i));
327 >            assertFalse(q.contains(i));
328 >            assertTrue(q.contains(i-1));
329 >        }
330 >        for (int i = 0; i < SIZE; i += 2) {
331 >            assertTrue(q.contains(i));
332 >            assertTrue(q.remove(i));
333 >            assertFalse(q.contains(i));
334 >            assertFalse(q.remove(i+1));
335 >            assertFalse(q.contains(i+1));
336          }
337          assertTrue(q.isEmpty());
338      }
339 <        
339 >
340      /**
341 <     *
341 >     * contains(x) reports true when elements added but not yet removed
342       */
343      public void testContains() {
344          PriorityQueue q = populatedQueue(SIZE);
# Line 350 | Line 350 | public class PriorityQueueTest extends J
350      }
351  
352      /**
353 <     *
353 >     * clear removes all elements
354       */
355      public void testClear() {
356          PriorityQueue q = populatedQueue(SIZE);
# Line 364 | Line 364 | public class PriorityQueueTest extends J
364      }
365  
366      /**
367 <     *
367 >     * containsAll(c) is true when c contains a subset of elements
368       */
369      public void testContainsAll() {
370          PriorityQueue q = populatedQueue(SIZE);
# Line 378 | Line 378 | public class PriorityQueueTest extends J
378      }
379  
380      /**
381 <     *
381 >     * retainAll(c) retains only those elements of c and reports true if changed
382       */
383      public void testRetainAll() {
384          PriorityQueue q = populatedQueue(SIZE);
# Line 397 | Line 397 | public class PriorityQueueTest extends J
397      }
398  
399      /**
400 <     *
400 >     * removeAll(c) removes only those elements of c and reports true if changed
401       */
402      public void testRemoveAll() {
403          for (int i = 1; i < SIZE; ++i) {
# Line 406 | Line 406 | public class PriorityQueueTest extends J
406              assertTrue(q.removeAll(p));
407              assertEquals(SIZE-i, q.size());
408              for (int j = 0; j < i; ++j) {
409 <                Integer I = (Integer)(p.remove());
410 <                assertFalse(q.contains(I));
409 >                Integer x = (Integer)(p.remove());
410 >                assertFalse(q.contains(x));
411              }
412          }
413      }
414  
415      /**
416 <     *
416 >     * toArray contains all elements
417       */
418      public void testToArray() {
419          PriorityQueue q = populatedQueue(SIZE);
420 <        Object[] o = q.toArray();
420 >        Object[] o = q.toArray();
421          Arrays.sort(o);
422 <        for(int i = 0; i < o.length; i++)
423 <            assertEquals(o[i], q.poll());
422 >        for (int i = 0; i < o.length; i++)
423 >            assertSame(o[i], q.poll());
424      }
425  
426      /**
427 <     *
427 >     * toArray(a) contains all elements
428       */
429      public void testToArray2() {
430 <        PriorityQueue q = populatedQueue(SIZE);
431 <        Integer[] ints = new Integer[SIZE];
432 <        ints = (Integer[])q.toArray(ints);
430 >        PriorityQueue<Integer> q = populatedQueue(SIZE);
431 >        Integer[] ints = new Integer[SIZE];
432 >        Integer[] array = q.toArray(ints);
433 >        assertSame(ints, array);
434          Arrays.sort(ints);
435 <        for(int i = 0; i < ints.length; i++)
436 <            assertEquals(ints[i], q.poll());
435 >        for (int i = 0; i < ints.length; i++)
436 >            assertSame(ints[i], q.poll());
437      }
438 <    
438 >
439      /**
440 <     *
440 >     * iterator iterates through all elements
441       */
442      public void testIterator() {
443          PriorityQueue q = populatedQueue(SIZE);
444 <        int i = 0;
445 <        Iterator it = q.iterator();
446 <        while(it.hasNext()) {
444 >        Iterator it = q.iterator();
445 >        int i;
446 >        for (i = 0; it.hasNext(); i++)
447              assertTrue(q.contains(it.next()));
447            ++i;
448        }
448          assertEquals(i, SIZE);
449 +        assertIteratorExhausted(it);
450 +    }
451 +
452 +    /**
453 +     * iterator of empty collection has no elements
454 +     */
455 +    public void testEmptyIterator() {
456 +        assertIteratorExhausted(new PriorityQueue().iterator());
457      }
458  
459      /**
460 <     *
460 >     * iterator.remove removes current element
461       */
462 <    public void testIteratorRemove () {
462 >    public void testIteratorRemove() {
463          final PriorityQueue q = new PriorityQueue(3);
464          q.add(new Integer(2));
465          q.add(new Integer(1));
# Line 468 | Line 475 | public class PriorityQueueTest extends J
475          assertFalse(it.hasNext());
476      }
477  
471
478      /**
479 <     *
479 >     * toString contains toStrings of elements
480       */
481      public void testToString() {
482          PriorityQueue q = populatedQueue(SIZE);
483          String s = q.toString();
484          for (int i = 0; i < SIZE; ++i) {
485 <            assertTrue(s.indexOf(String.valueOf(i)) >= 0);
485 >            assertTrue(s.contains(String.valueOf(i)));
486          }
487 <    }        
487 >    }
488  
489      /**
490 <     *
490 >     * A deserialized serialized queue has same elements
491       */
492 <    public void testSerialization() {
493 <        PriorityQueue q = populatedQueue(SIZE);
494 <        try {
489 <            ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
490 <            ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
491 <            out.writeObject(q);
492 <            out.close();
492 >    public void testSerialization() throws Exception {
493 >        Queue x = populatedQueue(SIZE);
494 >        Queue y = serialClone(x);
495  
496 <            ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
497 <            ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
498 <            PriorityQueue r = (PriorityQueue)in.readObject();
499 <            assertEquals(q.size(), r.size());
500 <            while (!q.isEmpty())
499 <                assertEquals(q.remove(), r.remove());
500 <        } catch(Exception e){
501 <            unexpectedException();
496 >        assertNotSame(x, y);
497 >        assertEquals(x.size(), y.size());
498 >        while (!x.isEmpty()) {
499 >            assertFalse(y.isEmpty());
500 >            assertEquals(x.remove(), y.remove());
501          }
502 +        assertTrue(y.isEmpty());
503      }
504   }

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