18 |
|
return new TestSuite(AtomicReferenceArrayTest.class); |
19 |
|
} |
20 |
|
|
21 |
+ |
/** |
22 |
+ |
* constructor creates array of given size with all elements null |
23 |
+ |
*/ |
24 |
|
public void testConstructor(){ |
25 |
|
AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE); |
26 |
|
for (int i = 0; i < SIZE; ++i) { |
28 |
|
} |
29 |
|
} |
30 |
|
|
31 |
+ |
/** |
32 |
+ |
* get and set for out of bound indices throw IndexOutOfBoundsException |
33 |
+ |
*/ |
34 |
+ |
public void testIndexing(){ |
35 |
+ |
AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE); |
36 |
+ |
try { |
37 |
+ |
ai.get(SIZE); |
38 |
+ |
} catch(IndexOutOfBoundsException success){ |
39 |
+ |
} |
40 |
+ |
try { |
41 |
+ |
ai.get(-1); |
42 |
+ |
} catch(IndexOutOfBoundsException success){ |
43 |
+ |
} |
44 |
+ |
try { |
45 |
+ |
ai.set(SIZE, null); |
46 |
+ |
} catch(IndexOutOfBoundsException success){ |
47 |
+ |
} |
48 |
+ |
try { |
49 |
+ |
ai.set(-1, null); |
50 |
+ |
} catch(IndexOutOfBoundsException success){ |
51 |
+ |
} |
52 |
+ |
} |
53 |
+ |
|
54 |
+ |
/** |
55 |
+ |
* get returns the last value set at index |
56 |
+ |
*/ |
57 |
|
public void testGetSet(){ |
58 |
|
AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
59 |
|
for (int i = 0; i < SIZE; ++i) { |
66 |
|
} |
67 |
|
} |
68 |
|
|
69 |
+ |
/** |
70 |
+ |
* compareAndSet succeeds in changing value if equal to expected else fails |
71 |
+ |
*/ |
72 |
|
public void testCompareAndSet(){ |
73 |
|
AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
74 |
|
for (int i = 0; i < SIZE; ++i) { |
83 |
|
} |
84 |
|
} |
85 |
|
|
86 |
+ |
/** |
87 |
+ |
* compareAndSet in one thread enables another waiting for value |
88 |
+ |
* to succeed |
89 |
+ |
*/ |
90 |
+ |
public void testCompareAndSetInMultipleThreads() { |
91 |
+ |
final AtomicReferenceArray a = new AtomicReferenceArray(1); |
92 |
+ |
a.set(0, one); |
93 |
+ |
Thread t = new Thread(new Runnable() { |
94 |
+ |
public void run() { |
95 |
+ |
while(!a.compareAndSet(0, two, three)) Thread.yield(); |
96 |
+ |
}}); |
97 |
+ |
try { |
98 |
+ |
t.start(); |
99 |
+ |
assertTrue(a.compareAndSet(0, one, two)); |
100 |
+ |
t.join(LONG_DELAY_MS); |
101 |
+ |
assertFalse(t.isAlive()); |
102 |
+ |
assertEquals(a.get(0), three); |
103 |
+ |
} |
104 |
+ |
catch(Exception e) { |
105 |
+ |
unexpectedException(); |
106 |
+ |
} |
107 |
+ |
} |
108 |
+ |
|
109 |
+ |
/** |
110 |
+ |
* repeated weakCompareAndSet succeeds in changing value when equal |
111 |
+ |
* to expected |
112 |
+ |
*/ |
113 |
|
public void testWeakCompareAndSet(){ |
114 |
|
AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
115 |
|
for (int i = 0; i < SIZE; ++i) { |
122 |
|
} |
123 |
|
} |
124 |
|
|
125 |
+ |
/** |
126 |
+ |
* getAndSet returns previous value and sets to given value at given index |
127 |
+ |
*/ |
128 |
|
public void testGetAndSet(){ |
129 |
|
AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
130 |
|
for (int i = 0; i < SIZE; ++i) { |
135 |
|
} |
136 |
|
} |
137 |
|
|
138 |
+ |
/** |
139 |
+ |
* a deserialized serialized array holds same values |
140 |
+ |
*/ |
141 |
|
public void testSerialization() { |
142 |
|
AtomicReferenceArray l = new AtomicReferenceArray(SIZE); |
143 |
|
for (int i = 0; i < SIZE; ++i) { |
158 |
|
assertEquals(r.get(i), l.get(i)); |
159 |
|
} |
160 |
|
} catch(Exception e){ |
161 |
< |
e.printStackTrace(); |
97 |
< |
fail("unexpected exception"); |
161 |
> |
unexpectedException(); |
162 |
|
} |
163 |
|
} |
164 |
|
|