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Comparing jsr166/src/test/tck/ConcurrentLinkedDequeTest.java (file contents):
Revision 1.6 by jsr166, Thu Nov 18 20:21:53 2010 UTC vs.
Revision 1.17 by jsr166, Sat Jan 17 22:55:06 2015 UTC

# Line 1 | Line 1
1   /*
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/licenses/publicdomain
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.Deque;
12 > import java.util.Iterator;
13 > import java.util.NoSuchElementException;
14 > import java.util.Queue;
15 > import java.util.Random;
16 > import java.util.concurrent.ConcurrentLinkedDeque;
17 >
18 > import junit.framework.Test;
19 > import junit.framework.TestSuite;
20  
21   public class ConcurrentLinkedDequeTest extends JSR166TestCase {
22  
# Line 22 | Line 29 | public class ConcurrentLinkedDequeTest e
29      }
30  
31      /**
32 <     * Create a deque of given size containing consecutive
32 >     * Returns a new deque of given size containing consecutive
33       * Integers 0 ... n.
34       */
35      private ConcurrentLinkedDeque<Integer> populatedDeque(int n) {
# Line 430 | Line 437 | public class ConcurrentLinkedDequeTest e
437       */
438      public void testRemoveElement() {
439          ConcurrentLinkedDeque q = populatedDeque(SIZE);
440 <        for (int i = 1; i < SIZE; i+=2) {
440 >        for (int i = 1; i < SIZE; i += 2) {
441              assertTrue(q.contains(i));
442              assertTrue(q.remove(i));
443              assertFalse(q.contains(i));
444              assertTrue(q.contains(i-1));
445          }
446 <        for (int i = 0; i < SIZE; i+=2) {
446 >        for (int i = 0; i < SIZE; i += 2) {
447              assertTrue(q.contains(i));
448              assertTrue(q.remove(i));
449              assertFalse(q.contains(i));
# Line 540 | Line 547 | public class ConcurrentLinkedDequeTest e
547       */
548      public void testRemoveFirstOccurrence() {
549          ConcurrentLinkedDeque q = populatedDeque(SIZE);
550 <        for (int i = 1; i < SIZE; i+=2) {
550 >        for (int i = 1; i < SIZE; i += 2) {
551              assertTrue(q.removeFirstOccurrence(new Integer(i)));
552          }
553 <        for (int i = 0; i < SIZE; i+=2) {
553 >        for (int i = 0; i < SIZE; i += 2) {
554              assertTrue(q.removeFirstOccurrence(new Integer(i)));
555              assertFalse(q.removeFirstOccurrence(new Integer(i+1)));
556          }
# Line 555 | Line 562 | public class ConcurrentLinkedDequeTest e
562       */
563      public void testRemoveLastOccurrence() {
564          ConcurrentLinkedDeque q = populatedDeque(SIZE);
565 <        for (int i = 1; i < SIZE; i+=2) {
565 >        for (int i = 1; i < SIZE; i += 2) {
566              assertTrue(q.removeLastOccurrence(new Integer(i)));
567          }
568 <        for (int i = 0; i < SIZE; i+=2) {
568 >        for (int i = 0; i < SIZE; i += 2) {
569              assertTrue(q.removeLastOccurrence(new Integer(i)));
570              assertFalse(q.removeLastOccurrence(new Integer(i+1)));
571          }
# Line 634 | Line 641 | public class ConcurrentLinkedDequeTest e
641              assertTrue(q.removeAll(p));
642              assertEquals(SIZE-i, q.size());
643              for (int j = 0; j < i; ++j) {
644 <                Integer I = (Integer)(p.remove());
645 <                assertFalse(q.contains(I));
644 >                Integer x = (Integer)(p.remove());
645 >                assertFalse(q.contains(x));
646              }
647          }
648      }
# Line 689 | Line 696 | public class ConcurrentLinkedDequeTest e
696       */
697      public void testIterator() {
698          ConcurrentLinkedDeque q = populatedDeque(SIZE);
692 –        int i = 0;
699          Iterator it = q.iterator();
700 <        while (it.hasNext()) {
700 >        int i;
701 >        for (i = 0; it.hasNext(); i++)
702              assertTrue(q.contains(it.next()));
696 –            ++i;
697 –        }
703          assertEquals(i, SIZE);
704 +        assertIteratorExhausted(it);
705 +    }
706 +
707 +    /**
708 +     * iterator of empty collection has no elements
709 +     */
710 +    public void testEmptyIterator() {
711 +        Deque c = new ConcurrentLinkedDeque();
712 +        assertIteratorExhausted(c.iterator());
713 +        assertIteratorExhausted(c.descendingIterator());
714      }
715  
716      /**
# Line 835 | Line 850 | public class ConcurrentLinkedDequeTest e
850          ConcurrentLinkedDeque q = populatedDeque(SIZE);
851          String s = q.toString();
852          for (int i = 0; i < SIZE; ++i) {
853 <            assertTrue(s.indexOf(String.valueOf(i)) >= 0);
853 >            assertTrue(s.contains(String.valueOf(i)));
854          }
855      }
856  
# Line 843 | Line 858 | public class ConcurrentLinkedDequeTest e
858       * A deserialized serialized deque has same elements in same order
859       */
860      public void testSerialization() throws Exception {
861 <        ConcurrentLinkedDeque q = populatedDeque(SIZE);
862 <        ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
863 <        ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
864 <        out.writeObject(q);
865 <        out.close();
866 <
867 <        ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
868 <        ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
869 <        ConcurrentLinkedDeque r = (ConcurrentLinkedDeque)in.readObject();
870 <        assertEquals(q.size(), r.size());
871 <        while (!q.isEmpty())
872 <            assertEquals(q.remove(), r.remove());
861 >        Queue x = populatedDeque(SIZE);
862 >        Queue y = serialClone(x);
863 >
864 >        assertNotSame(x, y);
865 >        assertEquals(x.size(), y.size());
866 >        assertEquals(x.toString(), y.toString());
867 >        assertTrue(Arrays.equals(x.toArray(), y.toArray()));
868 >        while (!x.isEmpty()) {
869 >            assertFalse(y.isEmpty());
870 >            assertEquals(x.remove(), y.remove());
871 >        }
872 >        assertTrue(y.isEmpty());
873      }
874  
875 +    /**
876 +     * contains(null) always return false.
877 +     * remove(null) always throws NullPointerException.
878 +     */
879 +    public void testNeverContainsNull() {
880 +        Deque<?>[] qs = {
881 +            new ConcurrentLinkedDeque<Object>(),
882 +            populatedDeque(2),
883 +        };
884 +
885 +        for (Deque<?> q : qs) {
886 +            assertFalse(q.contains(null));
887 +            try {
888 +                assertFalse(q.remove(null));
889 +                shouldThrow();
890 +            } catch (NullPointerException success) {}
891 +            try {
892 +                assertFalse(q.removeFirstOccurrence(null));
893 +                shouldThrow();
894 +            } catch (NullPointerException success) {}
895 +            try {
896 +                assertFalse(q.removeLastOccurrence(null));
897 +                shouldThrow();
898 +            } catch (NullPointerException success) {}
899 +        }
900 +    }
901   }

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