assertNull(treeMap.higherEntry(1));
assertFalse(treeMap.containsKey(1));
assertFalse(treeMap.containsValue(1));
assertNull(treeMap.get(1));
assertNull(treeMap.pollFirstEntry());
assertNull(treeMap.pollLastEntry());
assertEquals(0, treeMap.values().size());
}
public void test_TreeMap_Constructor_Comparator() {