@Override
    public Set<OpenstackNode> completeNodes() {
        Set<OpenstackNode> osNodes = osNodeStore.nodes().stream()
                .filter(osNode -> Objects.equals(osNode.state(), COMPLETE))
                .collect(Collectors.toSet());
        return ImmutableSet.copyOf(osNodes);
    }
@Test
    public void testGetCompleteNodes() {
        assertEquals(ERR_SIZE, 2, target.completeNodes().size());
        assertTrue(ERR_NOT_FOUND, target.completeNodes().contains(COMPUTE_3));
        assertTrue(ERR_NOT_FOUND, target.completeNodes().contains(GATEWAY_1));
    }