@Test(expected = NullPointerException.class)
public void testUnlock_whenNullKey() {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory(1);
MultiMap multiMap = getMultiMap(factory.newInstances(), randomString());
multiMap.unlock(null);
}
@Test(expected = NullPointerException.class)
public void testContainsKey_whenNullKey() throws InterruptedException {
TestHazelcastInstanceFactory factory = createHazelcastInstanceFactory(1);