test/tck/AtomicReferenceArrayTest.java

/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

import java.util.Arrays;
import java.util.concurrent.atomic.AtomicReferenceArray;

import junit.framework.Test;
import junit.framework.TestSuite;

public class AtomicReferenceArrayTest extends JSR166TestCase {
    public static void main(String[] args) {
        main(suite(), args);
    }
    public static Test suite() {
        return new TestSuite(AtomicReferenceArrayTest.class);
    }

    /**
     * constructor creates array of given size with all elements null
     */
    public void testConstructor() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            assertNull(aa.get(i));
        }
    }

    /**
     * constructor with null array throws NPE
     */
    public void testConstructor2NPE() {
        try {
            Integer[] a = null;
            new AtomicReferenceArray<Integer>(a);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * constructor with array is of same size and has all elements
     */
    public void testConstructor2() {
        Integer[] a = { two, one, three, four, seven };
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
        assertEquals(a.length, aa.length());
        for (int i = 0; i < a.length; i++)
            assertEquals(a[i], aa.get(i));
    }

    /**
     * Initialize AtomicReferenceArray<Class> with SubClass[]
     */
    public void testConstructorSubClassArray() {
        Integer[] a = { two, one, three, four, seven };
        AtomicReferenceArray<Number> aa = new AtomicReferenceArray<Number>(a);
        assertEquals(a.length, aa.length());
        for (int i = 0; i < a.length; i++) {
            assertSame(a[i], aa.get(i));
            Long x = Long.valueOf(i);
            aa.set(i, x);
            assertSame(x, aa.get(i));
        }
    }

    /**
     * get and set for out of bound indices throw IndexOutOfBoundsException
     */
    public void testIndexing() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int index : new int[] { -1, SIZE }) {
            try {
                aa.get(index);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.set(index, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.lazySet(index, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.compareAndSet(index, null, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.weakCompareAndSet(index, null, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.getPlain(index);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.getOpaque(index);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.getAcquire(index);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.setPlain(index, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.setOpaque(index, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.setRelease(index, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.compareAndExchange(index, null, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.compareAndExchangeAcquire(index, null, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.compareAndExchangeRelease(index, null, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.weakCompareAndSetVolatile(index, null, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.weakCompareAndSetAcquire(index, null, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
            try {
                aa.weakCompareAndSetRelease(index, null, null);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * get returns the last value set at index
     */
    public void testGetSet() {
        AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            assertSame(one, aa.get(i));
            aa.set(i, two);
            assertSame(two, aa.get(i));
            aa.set(i, m3);
            assertSame(m3, aa.get(i));
        }
    }

    /**
     * get returns the last value lazySet at index by same thread
     */
    public void testGetLazySet() {
        AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.lazySet(i, one);
            assertSame(one, aa.get(i));
            aa.lazySet(i, two);
            assertSame(two, aa.get(i));
            aa.lazySet(i, m3);
            assertSame(m3, aa.get(i));
        }
    }

    /**
     * compareAndSet succeeds in changing value if equal to expected else fails
     */
    public void testCompareAndSet() {
        AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            assertTrue(aa.compareAndSet(i, one, two));
            assertTrue(aa.compareAndSet(i, two, m4));
            assertSame(m4, aa.get(i));
            assertFalse(aa.compareAndSet(i, m5, seven));
            assertSame(m4, aa.get(i));
            assertTrue(aa.compareAndSet(i, m4, seven));
            assertSame(seven, aa.get(i));
        }
    }

    /**
     * compareAndSet in one thread enables another waiting for value
     * to succeed
     */
    public void testCompareAndSetInMultipleThreads() throws InterruptedException {
        final AtomicReferenceArray a = new AtomicReferenceArray(1);
        a.set(0, one);
        Thread t = new Thread(new CheckedRunnable() {
            public void realRun() {
                while (!a.compareAndSet(0, two, three))
                    Thread.yield();
            }});

        t.start();
        assertTrue(a.compareAndSet(0, one, two));
        t.join(LONG_DELAY_MS);
        assertFalse(t.isAlive());
        assertSame(three, a.get(0));
    }

    /**
     * repeated weakCompareAndSet succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSet() {
        AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            do {} while (!aa.weakCompareAndSet(i, one, two));
            do {} while (!aa.weakCompareAndSet(i, two, m4));
            assertSame(m4, aa.get(i));
            do {} while (!aa.weakCompareAndSet(i, m4, seven));
            assertSame(seven, aa.get(i));
        }
    }

    /**
     * getAndSet returns previous value and sets to given value at given index
     */
    public void testGetAndSet() {
        AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            assertSame(one, aa.getAndSet(i, zero));
            assertSame(zero, aa.getAndSet(i, m10));
            assertSame(m10, aa.getAndSet(i, one));
        }
    }

    /**
     * a deserialized serialized array holds same values
     */
    public void testSerialization() throws Exception {
        AtomicReferenceArray x = new AtomicReferenceArray(SIZE);
        for (int i = 0; i < SIZE; i++) {
            x.set(i, new Integer(-i));
        }
        AtomicReferenceArray y = serialClone(x);
        assertNotSame(x, y);
        assertEquals(x.length(), y.length());
        for (int i = 0; i < SIZE; i++) {
            assertEquals(x.get(i), y.get(i));
        }
    }

    /**
     * toString returns current value.
     */
    public void testToString() {
        Integer[] a = { two, one, three, four, seven };
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
        assertEquals(Arrays.toString(a), aa.toString());
    }

    // jdk9

    /**
     * getPlain returns the last value set
     */
    public void testGetPlainSet() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            assertEquals(one, aa.getPlain(i));
            aa.set(i, two);
            assertEquals(two, aa.getPlain(i));
            aa.set(i, m3);
            assertEquals(m3, aa.getPlain(i));
        }
    }

    /**
     * getOpaque returns the last value set
     */
    public void testGetOpaqueSet() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            assertEquals(one, aa.getOpaque(i));
            aa.set(i, two);
            assertEquals(two, aa.getOpaque(i));
            aa.set(i, m3);
            assertEquals(m3, aa.getOpaque(i));
        }
    }

    /**
     * getAcquire returns the last value set
     */
    public void testGetAcquireSet() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            assertEquals(one, aa.getAcquire(i));
            aa.set(i, two);
            assertEquals(two, aa.getAcquire(i));
            aa.set(i, m3);
            assertEquals(m3, aa.getAcquire(i));
        }
    }

    /**
     * get returns the last value setPlain
     */
    public void testGetSetPlain() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.setPlain(i, one);
            assertEquals(one, aa.get(i));
            aa.setPlain(i, two);
            assertEquals(two, aa.get(i));
            aa.setPlain(i, m3);
            assertEquals(m3, aa.get(i));
        }
    }

    /**
     * get returns the last value setOpaque
     */
    public void testGetSetOpaque() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.setOpaque(i, one);
            assertEquals(one, aa.get(i));
            aa.setOpaque(i, two);
            assertEquals(two, aa.get(i));
            aa.setOpaque(i, m3);
            assertEquals(m3, aa.get(i));
        }
    }

    /**
     * get returns the last value setRelease
     */
    public void testGetSetRelease() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.setRelease(i, one);
            assertEquals(one, aa.get(i));
            aa.setRelease(i, two);
            assertEquals(two, aa.get(i));
            aa.setRelease(i, m3);
            assertEquals(m3, aa.get(i));
        }
    }

    /**
     * compareAndExchange succeeds in changing value if equal to
     * expected else fails
     */
    public void testCompareAndExchange() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            assertEquals(one, aa.compareAndExchange(i, one, two));
            assertEquals(two, aa.compareAndExchange(i, two, m4));
            assertEquals(m4, aa.get(i));
            assertEquals(m4, aa.compareAndExchange(i,m5, seven));
            assertEquals(m4, aa.get(i));
            assertEquals(m4, aa.compareAndExchange(i, m4, seven));
            assertEquals(seven, aa.get(i));
        }
    }

    /**
     * compareAndExchangeAcquire succeeds in changing value if equal to
     * expected else fails
     */
    public void testCompareAndExchangeAcquire() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            assertEquals(one, aa.compareAndExchangeAcquire(i, one, two));
            assertEquals(two, aa.compareAndExchangeAcquire(i, two, m4));
            assertEquals(m4, aa.get(i));
            assertEquals(m4, aa.compareAndExchangeAcquire(i,m5, seven));
            assertEquals(m4, aa.get(i));
            assertEquals(m4, aa.compareAndExchangeAcquire(i, m4, seven));
            assertEquals(seven, aa.get(i));
        }
    }

    /**
     * compareAndExchangeRelease succeeds in changing value if equal to
     * expected else fails
     */
    public void testCompareAndExchangeRelease() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            assertEquals(one, aa.compareAndExchangeRelease(i, one, two));
            assertEquals(two, aa.compareAndExchangeRelease(i, two, m4));
            assertEquals(m4, aa.get(i));
            assertEquals(m4, aa.compareAndExchangeRelease(i,m5, seven));
            assertEquals(m4, aa.get(i));
            assertEquals(m4, aa.compareAndExchangeRelease(i, m4, seven));
            assertEquals(seven, aa.get(i));
        }
    }

    /**
     * repeated weakCompareAndSetVolatile succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSetVolatile() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            do {} while (!aa.weakCompareAndSetVolatile(i, one, two));
            do {} while (!aa.weakCompareAndSetVolatile(i, two, m4));
            assertEquals(m4, aa.get(i));
            do {} while (!aa.weakCompareAndSetVolatile(i, m4, seven));
            assertEquals(seven, aa.get(i));
        }
    }

    /**
     * repeated weakCompareAndSetAcquire succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSetAcquire() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            do {} while (!aa.weakCompareAndSetAcquire(i, one, two));
            do {} while (!aa.weakCompareAndSetAcquire(i, two, m4));
            assertEquals(m4, aa.get(i));
            do {} while (!aa.weakCompareAndSetAcquire(i, m4, seven));
            assertEquals(seven, aa.get(i));
        }
    }

    /**
     * repeated weakCompareAndSetRelease succeeds in changing value when equal
     * to expected
     */
    public void testWeakCompareAndSetRelease() {
        AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
        for (int i = 0; i < SIZE; i++) {
            aa.set(i, one);
            do {} while (!aa.weakCompareAndSetRelease(i, one, two));
            do {} while (!aa.weakCompareAndSetRelease(i, two, m4));
            assertEquals(m4, aa.get(i));
            do {} while (!aa.weakCompareAndSetRelease(i, m4, seven));
            assertEquals(seven, aa.get(i));
        }
    }
    
}
Revision:	1.33
Committed:	Thu Jun 16 23:35:25 2016 UTC (7 years, 10 months ago) by dl
Branch:	MAIN
Changes since 1.32:	+243 -0 lines
Log Message:	Add VarHandle atomic methods to Atomic classes
#	User	Rev	Content
1	dl	1.1	/*
2	dl	1.6	* 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	jsr166	1.19	* http://creativecommons.org/publicdomain/zero/1.0/
5	jsr166	1.11	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9	jsr166	1.21	import java.util.Arrays;
10			import java.util.concurrent.atomic.AtomicReferenceArray;
11	dl	1.1
12	jsr166	1.29	import junit.framework.Test;
13			import junit.framework.TestSuite;
14
15	jsr166	1.13	public class AtomicReferenceArrayTest extends JSR166TestCase {
16	jsr166	1.18	public static void main(String[] args) {
17	jsr166	1.32	main(suite(), args);
18	dl	1.1	}
19			public static Test suite() {
20			return new TestSuite(AtomicReferenceArrayTest.class);
21			}
22
23	dl	1.4	/**
24	dl	1.5	* constructor creates array of given size with all elements null
25	dl	1.4	*/
26	jsr166	1.13	public void testConstructor() {
27	jsr166	1.26	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
28			for (int i = 0; i < SIZE; i++) {
29			assertNull(aa.get(i));
30	dl	1.1	}
31			}
32
33	dl	1.4	/**
34	dl	1.7	* constructor with null array throws NPE
35			*/
36			public void testConstructor2NPE() {
37			try {
38			Integer[] a = null;
39	jsr166	1.31	new AtomicReferenceArray<Integer>(a);
40	jsr166	1.14	shouldThrow();
41	jsr166	1.15	} catch (NullPointerException success) {}
42	dl	1.7	}
43
44			/**
45			* constructor with array is of same size and has all elements
46			*/
47			public void testConstructor2() {
48	jsr166	1.23	Integer[] a = { two, one, three, four, seven };
49	jsr166	1.26	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
50			assertEquals(a.length, aa.length());
51			for (int i = 0; i < a.length; i++)
52			assertEquals(a[i], aa.get(i));
53	dl	1.7	}
54
55			/**
56	jsr166	1.27	* Initialize AtomicReferenceArray<Class> with SubClass[]
57	jsr166	1.22	*/
58			public void testConstructorSubClassArray() {
59			Integer[] a = { two, one, three, four, seven };
60			AtomicReferenceArray<Number> aa = new AtomicReferenceArray<Number>(a);
61			assertEquals(a.length, aa.length());
62	jsr166	1.26	for (int i = 0; i < a.length; i++) {
63	jsr166	1.22	assertSame(a[i], aa.get(i));
64			Long x = Long.valueOf(i);
65			aa.set(i, x);
66			assertSame(x, aa.get(i));
67			}
68			}
69
70			/**
71	dl	1.5	* get and set for out of bound indices throw IndexOutOfBoundsException
72			*/
73	jsr166	1.13	public void testIndexing() {
74	jsr166	1.26	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
75			for (int index : new int[] { -1, SIZE }) {
76			try {
77			aa.get(index);
78			shouldThrow();
79			} catch (IndexOutOfBoundsException success) {}
80			try {
81			aa.set(index, null);
82			shouldThrow();
83			} catch (IndexOutOfBoundsException success) {}
84			try {
85			aa.lazySet(index, null);
86			shouldThrow();
87			} catch (IndexOutOfBoundsException success) {}
88			try {
89			aa.compareAndSet(index, null, null);
90			shouldThrow();
91			} catch (IndexOutOfBoundsException success) {}
92			try {
93			aa.weakCompareAndSet(index, null, null);
94			shouldThrow();
95			} catch (IndexOutOfBoundsException success) {}
96	dl	1.33	try {
97			aa.getPlain(index);
98			shouldThrow();
99			} catch (IndexOutOfBoundsException success) {}
100			try {
101			aa.getOpaque(index);
102			shouldThrow();
103			} catch (IndexOutOfBoundsException success) {}
104			try {
105			aa.getAcquire(index);
106			shouldThrow();
107			} catch (IndexOutOfBoundsException success) {}
108			try {
109			aa.setPlain(index, null);
110			shouldThrow();
111			} catch (IndexOutOfBoundsException success) {}
112			try {
113			aa.setOpaque(index, null);
114			shouldThrow();
115			} catch (IndexOutOfBoundsException success) {}
116			try {
117			aa.setRelease(index, null);
118			shouldThrow();
119			} catch (IndexOutOfBoundsException success) {}
120			try {
121			aa.compareAndExchange(index, null, null);
122			shouldThrow();
123			} catch (IndexOutOfBoundsException success) {}
124			try {
125			aa.compareAndExchangeAcquire(index, null, null);
126			shouldThrow();
127			} catch (IndexOutOfBoundsException success) {}
128			try {
129			aa.compareAndExchangeRelease(index, null, null);
130			shouldThrow();
131			} catch (IndexOutOfBoundsException success) {}
132			try {
133			aa.weakCompareAndSetVolatile(index, null, null);
134			shouldThrow();
135			} catch (IndexOutOfBoundsException success) {}
136			try {
137			aa.weakCompareAndSetAcquire(index, null, null);
138			shouldThrow();
139			} catch (IndexOutOfBoundsException success) {}
140			try {
141			aa.weakCompareAndSetRelease(index, null, null);
142			shouldThrow();
143			} catch (IndexOutOfBoundsException success) {}
144	dl	1.5	}
145			}
146
147			/**
148			* get returns the last value set at index
149	dl	1.4	*/
150	jsr166	1.13	public void testGetSet() {
151	jsr166	1.26	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
152			for (int i = 0; i < SIZE; i++) {
153			aa.set(i, one);
154			assertSame(one, aa.get(i));
155			aa.set(i, two);
156			assertSame(two, aa.get(i));
157			aa.set(i, m3);
158			assertSame(m3, aa.get(i));
159	dl	1.1	}
160			}
161
162	dl	1.4	/**
163	dl	1.10	* get returns the last value lazySet at index by same thread
164			*/
165	jsr166	1.13	public void testGetLazySet() {
166	jsr166	1.26	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
167			for (int i = 0; i < SIZE; i++) {
168			aa.lazySet(i, one);
169			assertSame(one, aa.get(i));
170			aa.lazySet(i, two);
171			assertSame(two, aa.get(i));
172			aa.lazySet(i, m3);
173			assertSame(m3, aa.get(i));
174	dl	1.10	}
175			}
176
177			/**
178	dl	1.5	* compareAndSet succeeds in changing value if equal to expected else fails
179	dl	1.4	*/
180	jsr166	1.13	public void testCompareAndSet() {
181	jsr166	1.26	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
182			for (int i = 0; i < SIZE; i++) {
183			aa.set(i, one);
184			assertTrue(aa.compareAndSet(i, one, two));
185			assertTrue(aa.compareAndSet(i, two, m4));
186			assertSame(m4, aa.get(i));
187			assertFalse(aa.compareAndSet(i, m5, seven));
188			assertSame(m4, aa.get(i));
189			assertTrue(aa.compareAndSet(i, m4, seven));
190			assertSame(seven, aa.get(i));
191	dl	1.1	}
192			}
193
194	dl	1.4	/**
195	dl	1.5	* compareAndSet in one thread enables another waiting for value
196			* to succeed
197			*/
198	jsr166	1.15	public void testCompareAndSetInMultipleThreads() throws InterruptedException {
199	dl	1.5	final AtomicReferenceArray a = new AtomicReferenceArray(1);
200			a.set(0, one);
201	jsr166	1.16	Thread t = new Thread(new CheckedRunnable() {
202			public void realRun() {
203			while (!a.compareAndSet(0, two, three))
204			Thread.yield();
205			}});
206	jsr166	1.15
207			t.start();
208			assertTrue(a.compareAndSet(0, one, two));
209			t.join(LONG_DELAY_MS);
210			assertFalse(t.isAlive());
211	jsr166	1.25	assertSame(three, a.get(0));
212	dl	1.5	}
213
214			/**
215			* repeated weakCompareAndSet succeeds in changing value when equal
216	jsr166	1.11	* to expected
217	dl	1.4	*/
218	jsr166	1.13	public void testWeakCompareAndSet() {
219	jsr166	1.26	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
220			for (int i = 0; i < SIZE; i++) {
221			aa.set(i, one);
222	jsr166	1.30	do {} while (!aa.weakCompareAndSet(i, one, two));
223			do {} while (!aa.weakCompareAndSet(i, two, m4));
224	jsr166	1.26	assertSame(m4, aa.get(i));
225	jsr166	1.30	do {} while (!aa.weakCompareAndSet(i, m4, seven));
226	jsr166	1.26	assertSame(seven, aa.get(i));
227	dl	1.1	}
228			}
229
230	dl	1.4	/**
231	dl	1.5	* getAndSet returns previous value and sets to given value at given index
232	dl	1.4	*/
233	jsr166	1.13	public void testGetAndSet() {
234	jsr166	1.26	AtomicReferenceArray aa = new AtomicReferenceArray(SIZE);
235			for (int i = 0; i < SIZE; i++) {
236			aa.set(i, one);
237			assertSame(one, aa.getAndSet(i, zero));
238			assertSame(zero, aa.getAndSet(i, m10));
239			assertSame(m10, aa.getAndSet(i, one));
240	dl	1.1	}
241			}
242
243	dl	1.4	/**
244	dl	1.5	* a deserialized serialized array holds same values
245	dl	1.4	*/
246	jsr166	1.15	public void testSerialization() throws Exception {
247	jsr166	1.21	AtomicReferenceArray x = new AtomicReferenceArray(SIZE);
248			for (int i = 0; i < SIZE; i++) {
249			x.set(i, new Integer(-i));
250			}
251			AtomicReferenceArray y = serialClone(x);
252	jsr166	1.28	assertNotSame(x, y);
253	jsr166	1.21	assertEquals(x.length(), y.length());
254			for (int i = 0; i < SIZE; i++) {
255			assertEquals(x.get(i), y.get(i));
256	dl	1.2	}
257			}
258	dl	1.1
259	dl	1.9	/**
260			* toString returns current value.
261	jsr166	1.11	*/
262	dl	1.9	public void testToString() {
263	jsr166	1.23	Integer[] a = { two, one, three, four, seven };
264	jsr166	1.26	AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(a);
265			assertEquals(Arrays.toString(a), aa.toString());
266	dl	1.9	}
267	dl	1.33
268			// jdk9
269
270			/**
271			* getPlain returns the last value set
272			*/
273			public void testGetPlainSet() {
274			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
275			for (int i = 0; i < SIZE; i++) {
276			aa.set(i, one);
277			assertEquals(one, aa.getPlain(i));
278			aa.set(i, two);
279			assertEquals(two, aa.getPlain(i));
280			aa.set(i, m3);
281			assertEquals(m3, aa.getPlain(i));
282			}
283			}
284
285			/**
286			* getOpaque returns the last value set
287			*/
288			public void testGetOpaqueSet() {
289			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
290			for (int i = 0; i < SIZE; i++) {
291			aa.set(i, one);
292			assertEquals(one, aa.getOpaque(i));
293			aa.set(i, two);
294			assertEquals(two, aa.getOpaque(i));
295			aa.set(i, m3);
296			assertEquals(m3, aa.getOpaque(i));
297			}
298			}
299
300			/**
301			* getAcquire returns the last value set
302			*/
303			public void testGetAcquireSet() {
304			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
305			for (int i = 0; i < SIZE; i++) {
306			aa.set(i, one);
307			assertEquals(one, aa.getAcquire(i));
308			aa.set(i, two);
309			assertEquals(two, aa.getAcquire(i));
310			aa.set(i, m3);
311			assertEquals(m3, aa.getAcquire(i));
312			}
313			}
314
315			/**
316			* get returns the last value setPlain
317			*/
318			public void testGetSetPlain() {
319			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
320			for (int i = 0; i < SIZE; i++) {
321			aa.setPlain(i, one);
322			assertEquals(one, aa.get(i));
323			aa.setPlain(i, two);
324			assertEquals(two, aa.get(i));
325			aa.setPlain(i, m3);
326			assertEquals(m3, aa.get(i));
327			}
328			}
329
330			/**
331			* get returns the last value setOpaque
332			*/
333			public void testGetSetOpaque() {
334			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
335			for (int i = 0; i < SIZE; i++) {
336			aa.setOpaque(i, one);
337			assertEquals(one, aa.get(i));
338			aa.setOpaque(i, two);
339			assertEquals(two, aa.get(i));
340			aa.setOpaque(i, m3);
341			assertEquals(m3, aa.get(i));
342			}
343			}
344
345			/**
346			* get returns the last value setRelease
347			*/
348			public void testGetSetRelease() {
349			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
350			for (int i = 0; i < SIZE; i++) {
351			aa.setRelease(i, one);
352			assertEquals(one, aa.get(i));
353			aa.setRelease(i, two);
354			assertEquals(two, aa.get(i));
355			aa.setRelease(i, m3);
356			assertEquals(m3, aa.get(i));
357			}
358			}
359
360			/**
361			* compareAndExchange succeeds in changing value if equal to
362			* expected else fails
363			*/
364			public void testCompareAndExchange() {
365			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
366			for (int i = 0; i < SIZE; i++) {
367			aa.set(i, one);
368			assertEquals(one, aa.compareAndExchange(i, one, two));
369			assertEquals(two, aa.compareAndExchange(i, two, m4));
370			assertEquals(m4, aa.get(i));
371			assertEquals(m4, aa.compareAndExchange(i,m5, seven));
372			assertEquals(m4, aa.get(i));
373			assertEquals(m4, aa.compareAndExchange(i, m4, seven));
374			assertEquals(seven, aa.get(i));
375			}
376			}
377
378			/**
379			* compareAndExchangeAcquire succeeds in changing value if equal to
380			* expected else fails
381			*/
382			public void testCompareAndExchangeAcquire() {
383			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
384			for (int i = 0; i < SIZE; i++) {
385			aa.set(i, one);
386			assertEquals(one, aa.compareAndExchangeAcquire(i, one, two));
387			assertEquals(two, aa.compareAndExchangeAcquire(i, two, m4));
388			assertEquals(m4, aa.get(i));
389			assertEquals(m4, aa.compareAndExchangeAcquire(i,m5, seven));
390			assertEquals(m4, aa.get(i));
391			assertEquals(m4, aa.compareAndExchangeAcquire(i, m4, seven));
392			assertEquals(seven, aa.get(i));
393			}
394			}
395
396			/**
397			* compareAndExchangeRelease succeeds in changing value if equal to
398			* expected else fails
399			*/
400			public void testCompareAndExchangeRelease() {
401			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
402			for (int i = 0; i < SIZE; i++) {
403			aa.set(i, one);
404			assertEquals(one, aa.compareAndExchangeRelease(i, one, two));
405			assertEquals(two, aa.compareAndExchangeRelease(i, two, m4));
406			assertEquals(m4, aa.get(i));
407			assertEquals(m4, aa.compareAndExchangeRelease(i,m5, seven));
408			assertEquals(m4, aa.get(i));
409			assertEquals(m4, aa.compareAndExchangeRelease(i, m4, seven));
410			assertEquals(seven, aa.get(i));
411			}
412			}
413
414			/**
415			* repeated weakCompareAndSetVolatile succeeds in changing value when equal
416			* to expected
417			*/
418			public void testWeakCompareAndSetVolatile() {
419			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
420			for (int i = 0; i < SIZE; i++) {
421			aa.set(i, one);
422			do {} while (!aa.weakCompareAndSetVolatile(i, one, two));
423			do {} while (!aa.weakCompareAndSetVolatile(i, two, m4));
424			assertEquals(m4, aa.get(i));
425			do {} while (!aa.weakCompareAndSetVolatile(i, m4, seven));
426			assertEquals(seven, aa.get(i));
427			}
428			}
429
430			/**
431			* repeated weakCompareAndSetAcquire succeeds in changing value when equal
432			* to expected
433			*/
434			public void testWeakCompareAndSetAcquire() {
435			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
436			for (int i = 0; i < SIZE; i++) {
437			aa.set(i, one);
438			do {} while (!aa.weakCompareAndSetAcquire(i, one, two));
439			do {} while (!aa.weakCompareAndSetAcquire(i, two, m4));
440			assertEquals(m4, aa.get(i));
441			do {} while (!aa.weakCompareAndSetAcquire(i, m4, seven));
442			assertEquals(seven, aa.get(i));
443			}
444			}
445
446			/**
447			* repeated weakCompareAndSetRelease succeeds in changing value when equal
448			* to expected
449			*/
450			public void testWeakCompareAndSetRelease() {
451			AtomicReferenceArray<Integer> aa = new AtomicReferenceArray<Integer>(SIZE);
452			for (int i = 0; i < SIZE; i++) {
453			aa.set(i, one);
454			do {} while (!aa.weakCompareAndSetRelease(i, one, two));
455			do {} while (!aa.weakCompareAndSetRelease(i, two, m4));
456			assertEquals(m4, aa.get(i));
457			do {} while (!aa.weakCompareAndSetRelease(i, m4, seven));
458			assertEquals(seven, aa.get(i));
459			}
460			}
461
462	dl	1.1	}