72                 check(e.getValue() == 2);
  73             }
  74         } catch (Throwable t) {unexpected(t);}
  75 
  76         try {
  77             m.clear();
  78             check(m.isEmpty());
  79             m.put(1,2);
  80             Iterator<Map.Entry<Integer,Integer>> it = m.entrySet().iterator();
  81             if (it.hasNext()) {
  82                 m.put(1,3); // sneaky
  83                 Map.Entry<Integer, Integer> e = it.next();
  84                 check(e.getKey() == 1);
  85                 check(e.getValue() == 2 || e.getValue() == 3);
  86                 if (m instanceof ConcurrentHashMap) {
  87                     e.setValue(4);
  88                     check(m.get(1) == 4);
  89                 }
  90             }
  91         } catch (Throwable t) {unexpected(t);}















  92     }
  93 
  94     public static void main(String[] args) {
  95         test(new ConcurrentHashMap<Integer,Integer>());
  96         test(new ConcurrentSkipListMap<Integer,Integer>());
  97 
  98         System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
  99         if (failed > 0) throw new Error("Some tests failed");
 100     }
 101 }

  72                 check(e.getValue() == 2);
  73             }
  74         } catch (Throwable t) {unexpected(t);}
  75 
  76         try {
  77             m.clear();
  78             check(m.isEmpty());
  79             m.put(1,2);
  80             Iterator<Map.Entry<Integer,Integer>> it = m.entrySet().iterator();
  81             if (it.hasNext()) {
  82                 m.put(1,3); // sneaky
  83                 Map.Entry<Integer, Integer> e = it.next();
  84                 check(e.getKey() == 1);
  85                 check(e.getValue() == 2 || e.getValue() == 3);
  86                 if (m instanceof ConcurrentHashMap) {
  87                     e.setValue(4);
  88                     check(m.get(1) == 4);
  89                 }
  90             }
  91         } catch (Throwable t) {unexpected(t);}
  92 
  93         try {
  94             if (m instanceof ConcurrentSkipListMap) {
  95                 m.clear();
  96                 check(m.isEmpty());
  97                 m.put(1,2);
  98                 check(m.size() == 1);
  99                 ConcurrentSkipListMap mc = ((ConcurrentSkipListMap) m).clone();
 100                 check(m.size() == 1);
 101                 check(mc.size() == 1);
 102                 m.put(2,3);
 103                 check(m.size() == 2);
 104                 check(mc.size() == 1);
 105             }
 106         } catch (Throwable t) {unexpected(t);}
 107     }
 108 
 109     public static void main(String[] args) {
 110         test(new ConcurrentHashMap<Integer,Integer>());
 111         test(new ConcurrentSkipListMap<Integer,Integer>());
 112 
 113         System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
 114         if (failed > 0) throw new Error("Some tests failed");
 115     }
 116 }