19 |
|
} |
20 |
|
|
21 |
|
/** |
22 |
< |
* |
22 |
> |
* constructor creates array of given size with all elements null |
23 |
|
*/ |
24 |
|
public void testConstructor(){ |
25 |
|
AtomicReferenceArray<Integer> ai = new AtomicReferenceArray<Integer>(SIZE); |
29 |
|
} |
30 |
|
|
31 |
|
/** |
32 |
< |
* |
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); |
67 |
|
} |
68 |
|
|
69 |
|
/** |
70 |
< |
* |
70 |
> |
* compareAndSet succeeds in changing value if equal to expected else fails |
71 |
|
*/ |
72 |
|
public void testCompareAndSet(){ |
73 |
|
AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
84 |
|
} |
85 |
|
|
86 |
|
/** |
87 |
< |
* |
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); |
123 |
|
} |
124 |
|
|
125 |
|
/** |
126 |
< |
* |
126 |
> |
* getAndSet returns previous value and sets to given value at given index |
127 |
|
*/ |
128 |
|
public void testGetAndSet(){ |
129 |
|
AtomicReferenceArray ai = new AtomicReferenceArray(SIZE); |
136 |
|
} |
137 |
|
|
138 |
|
/** |
139 |
< |
* |
139 |
> |
* a deserialized serialized array holds same values |
140 |
|
*/ |
141 |
|
public void testSerialization() { |
142 |
|
AtomicReferenceArray l = new AtomicReferenceArray(SIZE); |