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import java.util.Random; |
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import java.util.Set; |
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import java.util.concurrent.ConcurrentHashMap; |
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import java.util.concurrent.ExecutorService; |
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import java.util.concurrent.Executors; |
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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public class ConcurrentHashMapTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run(suite()); |
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main(suite(), args); |
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} |
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public static Test suite() { |
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return new TestSuite(ConcurrentHashMapTest.class); |
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} |
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/** Re-implement Integer.compare for old java versions */ |
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static int compare(int x, int y) { return x < y ? -1 : x > y ? 1 : 0; } |
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static int compare(int x, int y) { |
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return (x < y) ? -1 : (x > y) ? 1 : 0; |
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} |
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|
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// classes for testing Comparable fallbacks |
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static class BI implements Comparable<BI> { |
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assertEquals("A", (String)map.get(one)); |
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ConcurrentHashMap empty = new ConcurrentHashMap(); |
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assertNull(map.get("anything")); |
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assertNull(empty.get("anything")); |
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} |
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|
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/** |
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} |
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|
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/** |
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* Test keySet().removeAll on empty map |
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*/ |
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public void testKeySet_empty_removeAll() { |
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ConcurrentHashMap<Integer, String> map = new ConcurrentHashMap<>(); |
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Set<Integer> set = map.keySet(); |
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set.removeAll(Collections.emptyList()); |
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assertTrue(map.isEmpty()); |
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assertTrue(set.isEmpty()); |
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// following is test for JDK-8163353 |
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set.removeAll(Collections.emptySet()); |
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assertTrue(map.isEmpty()); |
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assertTrue(set.isEmpty()); |
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} |
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|
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/** |
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* keySet.toArray returns contains all keys |
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*/ |
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public void testKeySetToArray() { |
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/** |
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* Constructor (initialCapacity, loadFactor) throws |
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* IllegalArgumentException if either argument is negative |
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*/ |
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*/ |
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public void testConstructor2() { |
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try { |
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new ConcurrentHashMap(-1, .75f); |
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shouldThrow(); |
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} catch (IllegalArgumentException e) {} |
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} catch (IllegalArgumentException success) {} |
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|
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try { |
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new ConcurrentHashMap(16, -1); |
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shouldThrow(); |
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} catch (IllegalArgumentException e) {} |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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/** |
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try { |
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new ConcurrentHashMap(-1, .75f, 1); |
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shouldThrow(); |
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} catch (IllegalArgumentException e) {} |
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} catch (IllegalArgumentException success) {} |
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|
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try { |
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new ConcurrentHashMap(16, -1, 1); |
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shouldThrow(); |
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} catch (IllegalArgumentException e) {} |
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} catch (IllegalArgumentException success) {} |
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|
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try { |
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new ConcurrentHashMap(16, .75f, -1); |
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shouldThrow(); |
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} catch (IllegalArgumentException e) {} |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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/** |
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try { |
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new ConcurrentHashMap(null); |
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shouldThrow(); |
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} catch (NullPointerException e) {} |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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assertFalse(map2.equals(map1)); |
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} |
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|
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|
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/** |
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* get(null) throws NPE |
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*/ |
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public void testGet_NullPointerException() { |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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try { |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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c.get(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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* containsKey(null) throws NPE |
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*/ |
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public void testContainsKey_NullPointerException() { |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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try { |
609 |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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c.containsKey(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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* containsValue(null) throws NPE |
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*/ |
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public void testContainsValue_NullPointerException() { |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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try { |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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c.containsValue(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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* contains(null) throws NPE |
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*/ |
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public void testContains_NullPointerException() { |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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try { |
631 |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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c.contains(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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* put(null,x) throws NPE |
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*/ |
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public void testPut1_NullPointerException() { |
660 |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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try { |
642 |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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c.put(null, "whatever"); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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* put(x, null) throws NPE |
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*/ |
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public void testPut2_NullPointerException() { |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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try { |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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c.put("whatever", null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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* putIfAbsent(null, x) throws NPE |
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*/ |
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public void testPutIfAbsent1_NullPointerException() { |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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try { |
664 |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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c.putIfAbsent(null, "whatever"); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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* replace(null, x) throws NPE |
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*/ |
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public void testReplace_NullPointerException() { |
693 |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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try { |
675 |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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c.replace(null, "whatever"); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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* replace(null, x, y) throws NPE |
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*/ |
703 |
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public void testReplaceValue_NullPointerException() { |
704 |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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try { |
686 |
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ConcurrentHashMap c = new ConcurrentHashMap(5); |
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c.replace(null, one, "whatever"); |
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shouldThrow(); |
708 |
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} catch (NullPointerException success) {} |
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* putIfAbsent(x, null) throws NPE |
713 |
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*/ |
714 |
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public void testPutIfAbsent2_NullPointerException() { |
715 |
+ |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
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try { |
697 |
– |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
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c.putIfAbsent("whatever", null); |
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shouldThrow(); |
719 |
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} catch (NullPointerException success) {} |
723 |
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* replace(x, null) throws NPE |
724 |
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*/ |
725 |
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public void testReplace2_NullPointerException() { |
726 |
+ |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
727 |
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try { |
708 |
– |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
728 |
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c.replace("whatever", null); |
729 |
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shouldThrow(); |
730 |
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} catch (NullPointerException success) {} |
734 |
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* replace(x, null, y) throws NPE |
735 |
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*/ |
736 |
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public void testReplaceValue2_NullPointerException() { |
737 |
+ |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
738 |
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try { |
719 |
– |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
739 |
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c.replace("whatever", null, "A"); |
740 |
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shouldThrow(); |
741 |
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} catch (NullPointerException success) {} |
745 |
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* replace(x, y, null) throws NPE |
746 |
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*/ |
747 |
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public void testReplaceValue3_NullPointerException() { |
748 |
+ |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
749 |
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try { |
730 |
– |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
750 |
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c.replace("whatever", one, null); |
751 |
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shouldThrow(); |
752 |
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} catch (NullPointerException success) {} |
756 |
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* remove(null) throws NPE |
757 |
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*/ |
758 |
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public void testRemove1_NullPointerException() { |
759 |
+ |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
760 |
+ |
c.put("sadsdf", "asdads"); |
761 |
|
try { |
741 |
– |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
742 |
– |
c.put("sadsdf", "asdads"); |
762 |
|
c.remove(null); |
763 |
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shouldThrow(); |
764 |
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} catch (NullPointerException success) {} |
768 |
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* remove(null, x) throws NPE |
769 |
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*/ |
770 |
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public void testRemove2_NullPointerException() { |
771 |
+ |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
772 |
+ |
c.put("sadsdf", "asdads"); |
773 |
|
try { |
753 |
– |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
754 |
– |
c.put("sadsdf", "asdads"); |
774 |
|
c.remove(null, "whatever"); |
775 |
|
shouldThrow(); |
776 |
|
} catch (NullPointerException success) {} |
820 |
|
} |
821 |
|
} |
822 |
|
|
823 |
+ |
/** |
824 |
+ |
* Tests performance of removeAll when the other collection is much smaller. |
825 |
+ |
* ant -Djsr166.tckTestClass=ConcurrentHashMapTest -Djsr166.methodFilter=testRemoveAll_performance -Djsr166.expensiveTests=true tck |
826 |
+ |
*/ |
827 |
+ |
public void testRemoveAll_performance() { |
828 |
+ |
final int mapSize = expensiveTests ? 1_000_000 : 100; |
829 |
+ |
final int iterations = expensiveTests ? 500 : 2; |
830 |
+ |
final ConcurrentHashMap<Integer, Integer> map = new ConcurrentHashMap<>(); |
831 |
+ |
for (int i = 0; i < mapSize; i++) |
832 |
+ |
map.put(i, i); |
833 |
+ |
Set<Integer> keySet = map.keySet(); |
834 |
+ |
Collection<Integer> removeMe = Arrays.asList(new Integer[] { -99, -86 }); |
835 |
+ |
for (int i = 0; i < iterations; i++) |
836 |
+ |
assertFalse(keySet.removeAll(removeMe)); |
837 |
+ |
assertEquals(mapSize, map.size()); |
838 |
+ |
} |
839 |
+ |
|
840 |
+ |
/** |
841 |
+ |
* Tests performance of computeIfAbsent when the element is present. |
842 |
+ |
* See JDK-8161372 |
843 |
+ |
* ant -Djsr166.tckTestClass=ConcurrentHashMapTest -Djsr166.methodFilter=testcomputeIfAbsent_performance -Djsr166.expensiveTests=true tck |
844 |
+ |
*/ |
845 |
+ |
public void testcomputeIfAbsent_performance() { |
846 |
+ |
final int mapSize = 20; |
847 |
+ |
final int iterations = expensiveTests ? (1 << 23) : mapSize * 2; |
848 |
+ |
final int threads = expensiveTests ? 10 : 2; |
849 |
+ |
final ConcurrentHashMap<Integer, Integer> map = new ConcurrentHashMap<>(); |
850 |
+ |
for (int i = 0; i < mapSize; i++) |
851 |
+ |
map.put(i, i); |
852 |
+ |
final ExecutorService pool = Executors.newFixedThreadPool(2); |
853 |
+ |
try (PoolCleaner cleaner = cleaner(pool)) { |
854 |
+ |
Runnable r = new CheckedRunnable() { |
855 |
+ |
public void realRun() { |
856 |
+ |
int result = 0; |
857 |
+ |
for (int i = 0; i < iterations; i++) |
858 |
+ |
result += map.computeIfAbsent(i % mapSize, (k) -> k + k); |
859 |
+ |
if (result == -42) throw new Error(); |
860 |
+ |
}}; |
861 |
+ |
for (int i = 0; i < threads; i++) |
862 |
+ |
pool.execute(r); |
863 |
+ |
} |
864 |
+ |
} |
865 |
+ |
|
866 |
|
} |