public void test_containsKeyLjava_lang_Object() {
EnumMap enumSizeMap = new EnumMap(Size.class);
assertFalse("Returned true for uncontained key", enumSizeMap //$NON-NLS-1$
.containsKey(Size.Small));
enumSizeMap.put(Size.Small, 1);
assertTrue("Returned false for contained key", enumSizeMap //$NON-NLS-1$
.containsKey(Size.Small));
enumSizeMap.put(Size.Big, null);
assertTrue("Returned false for contained key", enumSizeMap //$NON-NLS-1$
.containsKey(Size.Big));