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root/jsr166/jsr166/src/test/tck/ConcurrentHashMapTest.java

Comparing jsr166/src/test/tck/ConcurrentHashMapTest.java (file contents):
Revision 1.49 by jsr166, Sun Jul 17 19:02:07 2016 UTC vs.
Revision 1.51 by jsr166, Sat Oct 15 18:51:12 2016 UTC

#	Line 333 | Line 333 | public class ConcurrentHashMapTest exten
333		}
334
335		/**
336	+	* Test keySet().removeAll on empty map
337	+	*/
338	+	public void testKeySet_empty_removeAll() {
339	+	ConcurrentHashMap<Integer, String> map = new ConcurrentHashMap<>();
340	+	Set<Integer> set = map.keySet();
341	+	set.removeAll(Collections.emptyList());
342	+	assertTrue(map.isEmpty());
343	+	assertTrue(set.isEmpty());
344	+	// following is test for JDK-8163353
345	+	set.removeAll(Collections.emptySet());
346	+	assertTrue(map.isEmpty());
347	+	assertTrue(set.isEmpty());
348	+	}
349	+
350	+	/**
351		* keySet.toArray returns contains all keys
352		*/
353		public void testKeySetToArray() {
#	Line 822 | Line 837 | public class ConcurrentHashMapTest exten
837		assertEquals(mapSize, map.size());
838		}
839
825	–	/**
826	–	* Tests performance of computeIfAbsent when the element is present.
827	–	* See JDK-8161372
828	–	* ant -Djsr166.tckTestClass=ConcurrentHashMapTest -Djsr166.methodFilter=testcomputeIfAbsent_performance -Djsr166.expensiveTests=true tck
829	–	*/
830	–	public void testcomputeIfAbsent_performance() {
831	–	final int mapSize = 20;
832	–	final int iterations = expensiveTests ? (1 << 23) : mapSize * 2;
833	–	final int threads = expensiveTests ? 10 : 2;
834	–	final ConcurrentHashMap<Integer, Integer> map = new ConcurrentHashMap<>();
835	–	for (int i = 0; i < mapSize; i++)
836	–	map.put(i, i);
837	–	final ExecutorService pool = Executors.newFixedThreadPool(2);
838	–	try (PoolCleaner cleaner = cleaner(pool)) {
839	–	Runnable r = new CheckedRunnable() {
840	–	public void realRun() {
841	–	int result = 0;
842	–	for (int i = 0; i < iterations; i++)
843	–	result += map.computeIfAbsent(i % mapSize, (k) -> k + k);
844	–	if (result == -42) throw new Error();
845	–	}};
846	–	for (int i = 0; i < threads; i++)
847	–	pool.execute(r);
848	–	}
849	–	}
850	–
840		}

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