addEdge(graph3, "f", "g");
        List<String> expected3 = new ArrayList<>();
        expected3.add("d");
        expected3.add("g");
        expected3.add("f");
        expected3.add("e");
        expected3.add("c");
        expected3.add("b");
        expected3.add("a");
        List<String> actual3 = graph3.visitAll();
        assertEquals(expected3, actual3);

        ArrayList<DependencyScope> result = new ArrayList<>();
        result.add(internalScopeManager.createDependencyScope(DS_COMPILE, true, all()));
        result.add(internalScopeManager.createDependencyScope(
                DS_RUNTIME, true, byBuildPath(CommonBuilds.BUILD_PATH_RUNTIME)));
        result.add(internalScopeManager.createDependencyScope(
                DS_PROVIDED,
                false,

        Set<Artifact> artifacts = new LinkedHashSet<>(4);
        artifacts.add(new DefaultArtifact("g", "a1", "v", "compile", "jar", "", null));
        artifacts.add(new DefaultArtifact("g", "a2", "v", "compile", "jar", "", null));
        artifacts.add(new DefaultArtifact("g", "a3", "v", "compile", "jar", "", null));
        artifacts.add(new DefaultArtifact("g", "a4", "v", "compile", "jar", "", null));

    /**
     * Add a resource directory to the project.
     * @param project project reference.
     * @param resourceDirectory directory.
     * @param includes include patterns.
     * @param excludes exclude patterns.
     */
    void addResource(MavenProject project, String resourceDirectory, List<String> includes, List<String> excludes);

    /**
     * Add a test resource directory to the project.

            }
            result.add(BOX_CHAR + " " + sb + " " + BOX_CHAR);
        }
        // last line
        sb.setLength(0);
        repeat(sb, BOX_CHAR, size);
        result.add(sb.toString());
        return result;
    }

    private static void repeat(StringBuilder sb, char c, int nb) {
        for (int i = 0; i < nb; i++) {
            sb.append(c);
        }
    }

                    taskSegments.add(currentSegment);
                }

                currentSegment.getTasks().add(new GoalTask(task));
            } else {
                // lifecycle phase

                if (currentSegment == null || currentSegment.isAggregating()) {
                    currentSegment = new TaskSegment(false);
                    taskSegments.add(currentSegment);
                }

        if (!pluginArtifact.getGroupId().equals(pluginDescriptor.getGroupId())) {
            errors.add("Plugin's descriptor contains the wrong group ID: " + pluginDescriptor.getGroupId());
        }

        if (!pluginArtifact.getArtifactId().equals(pluginDescriptor.getArtifactId())) {
            errors.add("Plugin's descriptor contains the wrong artifact ID: " + pluginDescriptor.getArtifactId());
        }

                    return;
                }
                List<Path> toLoad = new ArrayList<>();
                Path root = defaultModelBuilder.getModelProcessor().locateExistingPom(rootDirectory);
                toLoad.add(root);
                while (!toLoad.isEmpty()) {
                    Path pom = toLoad.remove(0);
                    try {
                        ModelBuilderRequest gaBuildingRequest =

            if (optSelectedProject.isPresent()) {
                resolvedOptionalProjects.add(optSelectedProject.get());
                resolvedOptionalProjects.addAll(getChildProjects(optSelectedProject.get(), request));
            } else {
                unresolvedOptionalSelectors.add(selector);
            }
        }

        if (!unresolvedOptionalSelectors.isEmpty()) {

        if ("g".equals(artifact.getArtifactId())) {
            Artifact a = null;
            try {
                a = factory.createBuildArtifact("org.apache.maven", "h", "1.0", "jar");
                dependencies.add(a);
            } catch (Exception e) {
                throw new ArtifactMetadataRetrievalException("Error retrieving metadata", e, a);
            }
        }

        if ("i".equals(artifact.getArtifactId())) {