149         Key keyToFrob = keys.get(rnd.nextInt(keys.size()));
 150 
 151         Map<Key, Object> m = impl.emptyMap();
 152         for (Key key : keys) m.put(key, v1);
 153 
 154         for (Iterator<Map.Entry<Key, Object>> it = m.entrySet().iterator();
 155              it.hasNext(); ) {
 156             Map.Entry<Key, Object> entry = it.next();
 157             if (entry.getKey() == keyToFrob)
 158                 entry.setValue(v2); // does this have the expected effect?
 159             else
 160                 it.remove();
 161         }
 162 
 163         assertFalse(m.containsValue(v1));
 164         assertTrue(m.containsValue(v2));
 165         assertTrue(m.containsKey(keyToFrob));
 166         assertEquals(1, m.size());
 167     }
 168 














 169 //     public void testFailsIntentionallyForDebugging() {
 170 //         fail(impl.klazz().getSimpleName());
 171 //     }
 172 }

 149         Key keyToFrob = keys.get(rnd.nextInt(keys.size()));
 150 
 151         Map<Key, Object> m = impl.emptyMap();
 152         for (Key key : keys) m.put(key, v1);
 153 
 154         for (Iterator<Map.Entry<Key, Object>> it = m.entrySet().iterator();
 155              it.hasNext(); ) {
 156             Map.Entry<Key, Object> entry = it.next();
 157             if (entry.getKey() == keyToFrob)
 158                 entry.setValue(v2); // does this have the expected effect?
 159             else
 160                 it.remove();
 161         }
 162 
 163         assertFalse(m.containsValue(v1));
 164         assertTrue(m.containsValue(v2));
 165         assertTrue(m.containsKey(keyToFrob));
 166         assertEquals(1, m.size());
 167     }
 168 
 169     /**
 170      * "Missing" test found while investigating JDK-8210280.
 171      * See discussion on mailing list.
 172      * TODO: randomize
 173      */
 174     public void testBug8210280() {
 175         Map m = impl.emptyMap();
 176         for (int i = 0; i < 4; i++) m.put(7 + i * 16, 0);
 177         Map more = impl.emptyMap();
 178         for (int i = 0; i < 128; i++) more.put(-i, 42);
 179         m.putAll(more);
 180         for (int i = 0; i < 4; i++) assertEquals(0, m.get(7 + i * 16));
 181     }
 182 
 183 //     public void testFailsIntentionallyForDebugging() {
 184 //         fail(impl.klazz().getSimpleName());
 185 //     }
 186 }