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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 1.11 by jsr166, Mon Nov 2 20:28:31 2009 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
14 > public class AtomicReferenceArrayTest extends JSR166TestCase
15   {
16      public static void main (String[] args) {
17          junit.textui.TestRunner.run (suite());
# 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);
85 >        AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
86          for (int i = 0; i < SIZE; ++i) {
87              ai.set(i, one);
88              assertEquals(one,ai.get(i));
# Line 44 | Line 94 | public class AtomicReferenceArrayTest ex
94      }
95  
96      /**
97 <     *
97 >     * get returns the last value lazySet at index by same thread
98 >     */
99 >    public void testGetLazySet(){
100 >        AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
101 >        for (int i = 0; i < SIZE; ++i) {
102 >            ai.lazySet(i, one);
103 >            assertEquals(one,ai.get(i));
104 >            ai.lazySet(i, two);
105 >            assertEquals(two,ai.get(i));
106 >            ai.lazySet(i, m3);
107 >            assertEquals(m3,ai.get(i));
108 >        }
109 >    }
110 >
111 >    /**
112 >     * compareAndSet succeeds in changing value if equal to expected else fails
113       */
114      public void testCompareAndSet(){
115 <        AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
115 >        AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
116          for (int i = 0; i < SIZE; ++i) {
117              ai.set(i, one);
118              assertTrue(ai.compareAndSet(i, one,two));
# Line 61 | Line 126 | public class AtomicReferenceArrayTest ex
126      }
127  
128      /**
129 <     *
129 >     * compareAndSet in one thread enables another waiting for value
130 >     * to succeed
131 >     */
132 >    public void testCompareAndSetInMultipleThreads() {
133 >        final AtomicReferenceArray a = new AtomicReferenceArray(1);
134 >        a.set(0, one);
135 >        Thread t = new Thread(new Runnable() {
136 >                public void run() {
137 >                    while(!a.compareAndSet(0, two, three)) Thread.yield();
138 >                }});
139 >        try {
140 >            t.start();
141 >            assertTrue(a.compareAndSet(0, one, two));
142 >            t.join(LONG_DELAY_MS);
143 >            assertFalse(t.isAlive());
144 >            assertEquals(a.get(0), three);
145 >        }
146 >        catch(Exception e) {
147 >            unexpectedException();
148 >        }
149 >    }
150 >
151 >    /**
152 >     * repeated weakCompareAndSet succeeds in changing value when equal
153 >     * to expected
154       */
155      public void testWeakCompareAndSet(){
156 <        AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
156 >        AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
157          for (int i = 0; i < SIZE; ++i) {
158              ai.set(i, one);
159              while(!ai.weakCompareAndSet(i, one,two));
# Line 76 | Line 165 | public class AtomicReferenceArrayTest ex
165      }
166  
167      /**
168 <     *
168 >     * getAndSet returns previous value and sets to given value at given index
169       */
170      public void testGetAndSet(){
171 <        AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
171 >        AtomicReferenceArray ai = new AtomicReferenceArray(SIZE);
172          for (int i = 0; i < SIZE; ++i) {
173              ai.set(i, one);
174              assertEquals(one,ai.getAndSet(i,zero));
# Line 89 | Line 178 | public class AtomicReferenceArrayTest ex
178      }
179  
180      /**
181 <     *
181 >     * a deserialized serialized array holds same values
182       */
183      public void testSerialization() {
184 <        AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
184 >        AtomicReferenceArray l = new AtomicReferenceArray(SIZE);
185          for (int i = 0; i < SIZE; ++i) {
186              l.set(i, new Integer(-i));
187          }
# Line 115 | Line 204 | public class AtomicReferenceArrayTest ex
204          }
205      }
206  
207 +
208 +    /**
209 +     * toString returns current value.
210 +     */
211 +    public void testToString() {
212 +        Integer[] a = { two, one, three, four, seven};
213 +        AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(a);
214 +        assertEquals(Arrays.toString(a), ai.toString());
215 +    }
216   }

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