| 7 |
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import java.util.ArrayDeque; |
| 8 |
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import java.util.Arrays; |
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import java.util.Collection; |
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+ |
import java.util.Collections; |
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import java.util.Deque; |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
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import java.util.Queue; |
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import java.util.Random; |
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+ |
import java.util.concurrent.ThreadLocalRandom; |
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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
| 24 |
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} |
| 25 |
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|
| 26 |
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public static Test suite() { |
| 27 |
< |
return new TestSuite(ArrayDequeTest.class); |
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> |
class Implementation implements CollectionImplementation { |
| 28 |
> |
public Class<?> klazz() { return ArrayDeque.class; } |
| 29 |
> |
public Collection emptyCollection() { return new ArrayDeque(); } |
| 30 |
> |
public Object makeElement(int i) { return i; } |
| 31 |
> |
public boolean isConcurrent() { return false; } |
| 32 |
> |
public boolean permitsNulls() { return false; } |
| 33 |
> |
} |
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> |
return newTestSuite(ArrayDequeTest.class, |
| 35 |
> |
CollectionTest.testSuite(new Implementation())); |
| 36 |
|
} |
| 37 |
|
|
| 38 |
|
/** |
| 39 |
|
* Returns a new deque of given size containing consecutive |
| 40 |
< |
* Integers 0 ... n. |
| 40 |
> |
* Integers 0 ... n - 1. |
| 41 |
|
*/ |
| 42 |
|
private ArrayDeque<Integer> populatedDeque(int n) { |
| 43 |
< |
ArrayDeque<Integer> q = new ArrayDeque<Integer>(); |
| 43 |
> |
// Randomize various aspects of memory layout, including |
| 44 |
> |
// filled-to-capacity and wraparound. |
| 45 |
> |
final ArrayDeque<Integer> q; |
| 46 |
> |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
| 47 |
> |
switch (rnd.nextInt(6)) { |
| 48 |
> |
case 0: q = new ArrayDeque<Integer>(); break; |
| 49 |
> |
case 1: q = new ArrayDeque<Integer>(0); break; |
| 50 |
> |
case 2: q = new ArrayDeque<Integer>(1); break; |
| 51 |
> |
case 3: q = new ArrayDeque<Integer>(Math.max(0, n - 1)); break; |
| 52 |
> |
case 4: q = new ArrayDeque<Integer>(n); break; |
| 53 |
> |
case 5: q = new ArrayDeque<Integer>(n + 1); break; |
| 54 |
> |
default: throw new AssertionError(); |
| 55 |
> |
} |
| 56 |
> |
switch (rnd.nextInt(3)) { |
| 57 |
> |
case 0: |
| 58 |
> |
q.addFirst(42); |
| 59 |
> |
assertEquals((Integer) 42, q.removeLast()); |
| 60 |
> |
break; |
| 61 |
> |
case 1: |
| 62 |
> |
q.addLast(42); |
| 63 |
> |
assertEquals((Integer) 42, q.removeFirst()); |
| 64 |
> |
break; |
| 65 |
> |
case 2: /* do nothing */ break; |
| 66 |
> |
default: throw new AssertionError(); |
| 67 |
> |
} |
| 68 |
|
assertTrue(q.isEmpty()); |
| 69 |
< |
for (int i = 0; i < n; ++i) |
| 70 |
< |
assertTrue(q.offerLast(new Integer(i))); |
| 71 |
< |
assertFalse(q.isEmpty()); |
| 69 |
> |
if (rnd.nextBoolean()) |
| 70 |
> |
for (int i = 0; i < n; i++) |
| 71 |
> |
assertTrue(q.offerLast((Integer) i)); |
| 72 |
> |
else |
| 73 |
> |
for (int i = n; --i >= 0; ) |
| 74 |
> |
q.addFirst((Integer) i); |
| 75 |
|
assertEquals(n, q.size()); |
| 76 |
+ |
if (n > 0) { |
| 77 |
+ |
assertFalse(q.isEmpty()); |
| 78 |
+ |
assertEquals((Integer) 0, q.peekFirst()); |
| 79 |
+ |
assertEquals((Integer) (n - 1), q.peekLast()); |
| 80 |
+ |
} |
| 81 |
|
return q; |
| 82 |
|
} |
| 83 |
|
|
| 953 |
|
} |
| 954 |
|
|
| 955 |
|
/** |
| 956 |
+ |
* A cloned deque has same elements in same order |
| 957 |
+ |
*/ |
| 958 |
+ |
public void testClone() throws Exception { |
| 959 |
+ |
ArrayDeque<Integer> x = populatedDeque(SIZE); |
| 960 |
+ |
ArrayDeque<Integer> y = x.clone(); |
| 961 |
+ |
|
| 962 |
+ |
assertNotSame(y, x); |
| 963 |
+ |
assertEquals(x.size(), y.size()); |
| 964 |
+ |
assertEquals(x.toString(), y.toString()); |
| 965 |
+ |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
| 966 |
+ |
while (!x.isEmpty()) { |
| 967 |
+ |
assertFalse(y.isEmpty()); |
| 968 |
+ |
assertEquals(x.remove(), y.remove()); |
| 969 |
+ |
} |
| 970 |
+ |
assertTrue(y.isEmpty()); |
| 971 |
+ |
} |
| 972 |
+ |
|
| 973 |
+ |
/** |
| 974 |
|
* remove(null), contains(null) always return false |
| 975 |
|
*/ |
| 976 |
|
public void testNeverContainsNull() { |
| 987 |
|
} |
| 988 |
|
} |
| 989 |
|
|
| 990 |
+ |
/** |
| 991 |
+ |
* Handle capacities near Integer.MAX_VALUE. |
| 992 |
+ |
* ant -Dvmoptions=-Xmx24g -Djsr166.expensiveTests=true -Djsr166.tckTestClass=ArrayDequeTest -Djsr166.methodFilter=testHuge tck |
| 993 |
+ |
*/ |
| 994 |
+ |
public void testHuge() { |
| 995 |
+ |
if (! (testImplementationDetails |
| 996 |
+ |
&& expensiveTests |
| 997 |
+ |
&& Runtime.getRuntime().freeMemory() > 21_000_000_000L)) |
| 998 |
+ |
return; |
| 999 |
+ |
int maxSize = Integer.MAX_VALUE - 8; |
| 1000 |
+ |
ArrayDeque<Integer> q; |
| 1001 |
+ |
|
| 1002 |
+ |
q = new ArrayDeque<>(maxSize); |
| 1003 |
+ |
|
| 1004 |
+ |
assertThrows(OutOfMemoryError.class, |
| 1005 |
+ |
() -> new ArrayDeque<>(Integer.MAX_VALUE)); |
| 1006 |
+ |
|
| 1007 |
+ |
q = populatedDeque(0); |
| 1008 |
+ |
q.addAll(Collections.nCopies(maxSize - 2, (Integer) 42)); |
| 1009 |
+ |
assertEquals((Integer) 42, q.peekFirst()); |
| 1010 |
+ |
assertEquals((Integer) 42, q.peekLast()); |
| 1011 |
+ |
assertEquals(maxSize - 2, q.size()); |
| 1012 |
+ |
q.addFirst((Integer) 0); |
| 1013 |
+ |
q.addLast((Integer) 1); |
| 1014 |
+ |
assertEquals((Integer) 0, q.peekFirst()); |
| 1015 |
+ |
assertEquals((Integer) 1, q.peekLast()); |
| 1016 |
+ |
assertEquals(maxSize, q.size()); |
| 1017 |
+ |
} |
| 1018 |
+ |
|
| 1019 |
|
} |
