@Override
    public Set<OpenstackNode> nodes() {
        return osNodeStore.nodes();
    }
@Test
    public void testGetNodesByType() {
        assertEquals(ERR_SIZE, 2, target.nodes(COMPUTE).size());
        assertTrue(ERR_NOT_FOUND, target.nodes(COMPUTE).contains(COMPUTE_2));
        assertTrue(ERR_NOT_FOUND, target.nodes(COMPUTE).contains(COMPUTE_3));

        assertEquals(ERR_SIZE, 1, target.nodes(GATEWAY).size());
        assertTrue(ERR_NOT_FOUND, target.nodes(GATEWAY).contains(GATEWAY_1));
    }