/** containsValue(null) throws NPE */
public void testContainsValue_NullPointerException() {
try {
ConcurrentNavigableMap c = map0();
c.containsValue(null);
shouldThrow();
} catch (NullPointerException success) {
}
}
/** containsValue returns true for held values */
public void testContainsValue() {
ConcurrentNavigableMap map = map5();
assertTrue(map.containsValue("A"));
assertFalse(map.containsValue("Z"));
}