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Comparing jsr166/src/test/tck/AtomicReferenceArrayTest.java (file contents):
Revision 1.4 by dl, Sat Sep 20 18:20:07 2003 UTC vs.
Revision 1.9 by dl, Sat Jan 10 01:41:59 2004 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/licenses/publicdomain
5 > * Other contributors include Andrew Wright, Jeffrey Hayes,
6 > * Pat Fisher, Mike Judd.
7   */
8  
9   import junit.framework.*;
10   import java.util.concurrent.atomic.*;
11   import java.io.*;
12 + import java.util.*;
13  
14   public class AtomicReferenceArrayTest extends JSR166TestCase
15   {
# Line 19 | Line 21 | public class AtomicReferenceArrayTest ex
21      }
22  
23      /**
24 <     *
24 >     * constructor creates array of given size with all elements null
25       */
26      public void testConstructor(){
27          AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
# Line 29 | Line 31 | public class AtomicReferenceArrayTest ex
31      }
32  
33      /**
34 <     *
34 >     * constructor with null array throws NPE
35 >     */
36 >    public void testConstructor2NPE() {
37 >        try {
38 >            Integer[] a = null;
39 >            AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
40 >        } catch (NullPointerException success) {
41 >        } catch (Exception ex) {
42 >            unexpectedException();
43 >        }
44 >    }
45 >
46 >    /**
47 >     * constructor with array is of same size and has all elements
48 >     */
49 >    public void testConstructor2() {
50 >        Integer[] a = { two, one, three, four, seven};
51 >        AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
52 >        assertEquals(a.length, ai.length());
53 >        for (int i = 0; i < a.length; ++i)
54 >            assertEquals(a[i], ai.get(i));
55 >    }
56 >
57 >
58 >    /**
59 >     * get and set for out of bound indices throw IndexOutOfBoundsException
60 >     */
61 >    public void testIndexing(){
62 >        AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE);
63 >        try {
64 >            ai.get(SIZE);
65 >        } catch(IndexOutOfBoundsException success){
66 >        }
67 >        try {
68 >            ai.get(-1);
69 >        } catch(IndexOutOfBoundsException success){
70 >        }
71 >        try {
72 >            ai.set(SIZE, null);
73 >        } catch(IndexOutOfBoundsException success){
74 >        }
75 >        try {
76 >            ai.set(-1, null);
77 >        } catch(IndexOutOfBoundsException success){
78 >        }
79 >    }
80 >
81 >    /**
82 >     * get returns the last value set at index
83       */
84      public void testGetSet(){
85          AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
# Line 44 | Line 94 | public class AtomicReferenceArrayTest ex
94      }
95  
96      /**
97 <     *
97 >     * compareAndSet succeeds in changing value if equal to expected else fails
98       */
99      public void testCompareAndSet(){
100          AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
# Line 61 | Line 111 | public class AtomicReferenceArrayTest ex
111      }
112  
113      /**
114 <     *
114 >     * compareAndSet in one thread enables another waiting for value
115 >     * to succeed
116 >     */
117 >    public void testCompareAndSetInMultipleThreads() {
118 >        final AtomicReferenceArray a = new AtomicReferenceArray(1);
119 >        a.set(0, one);
120 >        Thread t = new Thread(new Runnable() {
121 >                public void run() {
122 >                    while(!a.compareAndSet(0, two, three)) Thread.yield();
123 >                }});
124 >        try {
125 >            t.start();
126 >            assertTrue(a.compareAndSet(0, one, two));
127 >            t.join(LONG_DELAY_MS);
128 >            assertFalse(t.isAlive());
129 >            assertEquals(a.get(0), three);
130 >        }
131 >        catch(Exception e) {
132 >            unexpectedException();
133 >        }
134 >    }
135 >
136 >    /**
137 >     * repeated weakCompareAndSet succeeds in changing value when equal
138 >     * to expected
139       */
140      public void testWeakCompareAndSet(){
141          AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
# Line 76 | Line 150 | public class AtomicReferenceArrayTest ex
150      }
151  
152      /**
153 <     *
153 >     * getAndSet returns previous value and sets to given value at given index
154       */
155      public void testGetAndSet(){
156          AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
# Line 89 | Line 163 | public class AtomicReferenceArrayTest ex
163      }
164  
165      /**
166 <     *
166 >     * a deserialized serialized array holds same values
167       */
168      public void testSerialization() {
169          AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
# Line 115 | Line 189 | public class AtomicReferenceArrayTest ex
189          }
190      }
191  
192 +
193 +    /**
194 +     * toString returns current value.
195 +     */
196 +    public void testToString() {
197 +        Integer[] a = { two, one, three, four, seven};
198 +        AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
199 +        assertEquals(Arrays.toString(a), ai.toString());
200 +    }
201   }

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