}

    public Stream<BuildStep> allPredecessors() {
        return preds(new HashSet<>()).stream();
    }

    private Set<BuildStep> preds(Set<BuildStep> preds) {
        if (preds.add(this)) {
            this.predecessors.forEach(n -> n.preds(preds));
        }
        return preds;
    }

    public boolean isSuccessorOf(BuildStep step) {

    }

    protected Stream<BuildStep> nonEmptyPredecessors(BuildStep step) {
        HashSet<BuildStep> preds = new HashSet<>();
        nonEmptyPredecessors(step, preds, new HashSet<>());
        return preds.stream();
    }

    private void nonEmptyPredecessors(BuildStep step, Set<BuildStep> preds, Set<BuildStep> visited) {
        if (visited.add(step)) {
            step.predecessors.forEach(ch -> {

        TestCredentials creds = new TestCredentials("A", true, false, subject, false);

        // Act
        TestCredentials copy = creds.clone();

        // Assert
        assertNotSame(creds, copy, "clone must return a new instance");
        assertEquals(creds.getUserDomain(), copy.getUserDomain());
        assertEquals(creds.isAnonymous(), copy.isAnonymous());
        assertEquals(creds.isGuest(), copy.isGuest());

    private Credentials creds;

    /**
     * Constructs a CIFS context wrapper with custom credentials.
     *
     * @param delegate the context to wrap
     * @param creds
     *            Credentials to use
     */
    public CIFSContextCredentialWrapper(final AbstractCIFSContext delegate, final Credentials creds) {
        super(delegate);
        this.creds = creds;
    }

    /**
     *

    NodeConnection(N node) {
      this.node = checkNotNull(node);
    }

    static final class Pred<N> extends NodeConnection<N> {
      Pred(N node) {
        super(node);
      }

      @Override
      public boolean equals(@Nullable Object that) {
        if (that instanceof Pred) {
          return this.node.equals(((Pred<?>) that).node);
        } else {
          return false;
        }
      }

      @Override

    void testWithCredentials() {
        // Given
        Credentials creds = mock(Credentials.class);
        CIFSContext newContext = mock(CIFSContext.class);
        when(mockContext.withCredentials(creds)).thenReturn(newContext);

        // When
        CIFSContext context = mockContext.withCredentials(creds);

        // Then
        assertEquals(newContext, context);

        }.writePlan(System.out::println, plan);

        plan.allSteps().forEach(phase -> {
            phase.predecessors.forEach(
                    pred -> assertTrue(plan.step(pred.project, pred.name).isPresent(), "Phase not present: " + pred));
        });
    }

    @Test
    void testAlias() {
        MavenProject p1 = new MavenProject();
        p1.setArtifactId("p1");

        Runtime.getRuntime().addShutdownHook(this);
    }

    /**
     * @param creds the credentials to use
     * @return a wrapped context with the given credentials
     */
    @Override
    public CIFSContext withCredentials(final Credentials creds) {
        return new CIFSContextCredentialWrapper(this, creds);
    }

    /**
     *
     * {@inheritDoc}
     *

  }

  private void setPredecessor(int entry, int pred) {
    requirePredecessors()[entry] = pred + 1;
  }

  private void setSucceeds(int pred, int succ) {
    if (pred == ENDPOINT) {
      firstEntry = succ;
    } else {
      setSuccessor(pred, succ);
    }

    if (succ == ENDPOINT) {
      lastEntry = pred;
    } else {
      setPredecessor(succ, pred);
    }
  }

  @Override

  }

  private void setPredecessor(int entry, int pred) {
    requirePredecessors()[entry] = pred + 1;
  }

  private void setSucceeds(int pred, int succ) {
    if (pred == ENDPOINT) {
      firstEntry = succ;
    } else {
      setSuccessor(pred, succ);
    }

    if (succ == ENDPOINT) {
      lastEntry = pred;
    } else {
      setPredecessor(succ, pred);
    }
  }

  @Override