@Override
    @ManagedOperation(description = "Adds the key to the store")
    public boolean add(String key) {
        if (!contains(key)) {
            return setOperations.add(repositoryName, key) != null;
        } else {
            return false;
        }
    }
@Test
    public void shouldAddKey() {
        idempotentRepository.add(KEY);
        verify(setOperations).add(REPOSITORY, KEY);
    }