assertEquals(true, map.containsValue("A", "Z"));
assertEquals(false, map.putAll("A", null));
assertEquals(3, map.size("A"));
assertEquals(true, map.containsValue("A", "X"));
assertEquals(true, map.containsValue("A", "Y"));
assertEquals(true, map.containsValue("A", "Z"));
assertEquals(false, map.putAll("A", new ArrayList()));
assertEquals(3, map.size("A"));
assertEquals(true, map.containsValue("A", "X"));