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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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– |
import junit.framework.Test; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.concurrent.CompletableFuture; |
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import java.util.concurrent.ThreadLocalRandom; |
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import java.util.concurrent.atomic.AtomicBoolean; |
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import java.util.concurrent.atomic.AtomicLong; |
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import java.util.function.BiFunction; |
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import junit.framework.Test; |
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/** |
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* Contains tests applicable to all Map implementations. |
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*/ |
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@SuppressWarnings("unchecked") |
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public class MapTest extends JSR166TestCase { |
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final MapImplementation impl; |
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{ |
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Map m = impl.emptyMap(); |
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assertTrue(m.isEmpty()); |
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assertEquals(0, m.size()); |
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mustEqual(0, m.size()); |
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Object k = impl.makeKey(rnd.nextInt()); |
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Object v = impl.makeValue(rnd.nextInt()); |
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m.put(k, v); |
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assertFalse(m.isEmpty()); |
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assertEquals(1, m.size()); |
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mustEqual(1, m.size()); |
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assertTrue(m.containsKey(k)); |
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assertTrue(m.containsValue(v)); |
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} |
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*/ |
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public void testBug8186171() { |
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if (!impl.supportsSetValue()) return; |
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if (!atLeastJava10()) return; // jdk9 is no longer maintained |
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final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
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final boolean permitsNullValues = impl.permitsNullValues(); |
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final Object v1 = (permitsNullValues && rnd.nextBoolean()) |
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assertFalse(m.containsValue(v1)); |
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assertTrue(m.containsValue(v2)); |
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assertTrue(m.containsKey(keyToFrob)); |
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assertEquals(1, m.size()); |
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mustEqual(1, m.size()); |
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} |
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/** |
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* "Missing" test found while investigating JDK-8210280. |
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* See discussion on mailing list. |
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* TODO: randomize |
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* ant -Djsr166.tckTestClass=HashMapTest -Djsr166.methodFilter=testBug8210280 -Djsr166.runsPerTest=1000000 tck |
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*/ |
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public void testBug8210280() { |
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Map m = impl.emptyMap(); |
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for (int i = 0; i < 4; i++) m.put(7 + i * 16, 0); |
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Map more = impl.emptyMap(); |
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for (int i = 0; i < 128; i++) more.put(-i, 42); |
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m.putAll(more); |
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for (int i = 0; i < 4; i++) assertEquals(0, m.get(7 + i * 16)); |
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final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
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final int size1 = rnd.nextInt(32); |
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final int size2 = rnd.nextInt(128); |
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|
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final Map m1 = impl.emptyMap(); |
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for (int i = 0; i < size1; i++) { |
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int elt = rnd.nextInt(1024 * i, 1024 * (i + 1)); |
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> |
assertNull(m1.put(impl.makeKey(elt), impl.makeValue(elt))); |
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> |
} |
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|
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final Map m2 = impl.emptyMap(); |
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for (int i = 0; i < size2; i++) { |
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> |
int elt = rnd.nextInt(Integer.MIN_VALUE + 1024 * i, |
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> |
Integer.MIN_VALUE + 1024 * (i + 1)); |
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> |
assertNull(m2.put(impl.makeKey(elt), impl.makeValue(-elt))); |
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> |
} |
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> |
|
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> |
final Map m1Copy = impl.emptyMap(); |
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> |
m1Copy.putAll(m1); |
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> |
|
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m1.putAll(m2); |
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|
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for (Object elt : m2.keySet()) |
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mustEqual(m2.get(elt), m1.get(elt)); |
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> |
for (Object elt : m1Copy.keySet()) |
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> |
assertSame(m1Copy.get(elt), m1.get(elt)); |
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> |
mustEqual(size1 + size2, m1.size()); |
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> |
} |
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> |
|
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> |
/** |
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* 8222930: ConcurrentSkipListMap.clone() shares size variable between original and clone |
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> |
*/ |
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> |
public void testClone() { |
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> |
final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
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> |
final int size = rnd.nextInt(4); |
| 188 |
> |
final Map map = impl.emptyMap(); |
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> |
for (int i = 0; i < size; i++) |
| 190 |
> |
map.put(impl.makeKey(i), impl.makeValue(i)); |
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> |
final Map clone = cloneableClone(map); |
| 192 |
> |
if (clone == null) return; // not cloneable? |
| 193 |
> |
|
| 194 |
> |
mustEqual(size, map.size()); |
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> |
mustEqual(size, clone.size()); |
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> |
mustEqual(map.isEmpty(), clone.isEmpty()); |
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> |
|
| 198 |
> |
clone.put(impl.makeKey(-1), impl.makeValue(-1)); |
| 199 |
> |
mustEqual(size, map.size()); |
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> |
mustEqual(size + 1, clone.size()); |
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> |
|
| 202 |
> |
clone.clear(); |
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> |
mustEqual(size, map.size()); |
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> |
mustEqual(0, clone.size()); |
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> |
assertTrue(clone.isEmpty()); |
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> |
} |
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> |
|
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> |
/** |
| 209 |
> |
* Concurrent access by compute methods behaves as expected |
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> |
*/ |
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> |
public void testConcurrentAccess() throws Throwable { |
| 212 |
> |
final Map map = impl.emptyMap(); |
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> |
final long testDurationMillis = expensiveTests ? 1000 : 2; |
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> |
final int nTasks = impl.isConcurrent() |
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> |
? ThreadLocalRandom.current().nextInt(1, 10) |
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> |
: 1; |
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> |
final AtomicBoolean done = new AtomicBoolean(false); |
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> |
final boolean remappingFunctionCalledAtMostOnce |
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> |
= impl.remappingFunctionCalledAtMostOnce(); |
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> |
final List<CompletableFuture> futures = new ArrayList<>(); |
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> |
final AtomicLong expectedSum = new AtomicLong(0); |
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> |
final Action[] tasks = { |
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> |
// repeatedly increment values using compute() |
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> |
() -> { |
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> |
long[] invocations = new long[2]; |
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> |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
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> |
BiFunction<Object, Object, Object> incValue = (k, v) -> { |
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> |
invocations[1]++; |
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> |
int vi = (v == null) ? 1 : impl.valueToInt(v) + 1; |
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> |
return impl.makeValue(vi); |
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> |
}; |
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> |
while (!done.getAcquire()) { |
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> |
invocations[0]++; |
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> |
Object key = impl.makeKey(3 * rnd.nextInt(10)); |
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> |
map.compute(key, incValue); |
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> |
} |
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> |
if (remappingFunctionCalledAtMostOnce) |
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> |
mustEqual(invocations[0], invocations[1]); |
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> |
expectedSum.getAndAdd(invocations[0]); |
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> |
}, |
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> |
// repeatedly increment values using computeIfPresent() |
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> |
() -> { |
| 243 |
> |
long[] invocations = new long[2]; |
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> |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
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> |
BiFunction<Object, Object, Object> incValue = (k, v) -> { |
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> |
invocations[1]++; |
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> |
int vi = impl.valueToInt(v) + 1; |
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> |
return impl.makeValue(vi); |
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> |
}; |
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> |
while (!done.getAcquire()) { |
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> |
Object key = impl.makeKey(3 * rnd.nextInt(10)); |
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> |
if (map.computeIfPresent(key, incValue) != null) |
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> |
invocations[0]++; |
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> |
} |
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> |
if (remappingFunctionCalledAtMostOnce) |
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> |
mustEqual(invocations[0], invocations[1]); |
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> |
expectedSum.getAndAdd(invocations[0]); |
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> |
}, |
| 259 |
> |
}; |
| 260 |
> |
for (int i = nTasks; i--> 0; ) { |
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> |
Action task = chooseRandomly(tasks); |
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> |
futures.add(CompletableFuture.runAsync(checkedRunnable(task))); |
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> |
} |
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> |
Thread.sleep(testDurationMillis); |
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> |
done.setRelease(true); |
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> |
for (var future : futures) |
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> |
checkTimedGet(future, null); |
| 268 |
> |
|
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> |
long sum = map.values().stream().mapToLong(x -> (int) x).sum(); |
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> |
mustEqual(expectedSum.get(), sum); |
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} |
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|
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// public void testFailsIntentionallyForDebugging() { |
