this.pomFile = pomFile;
        context = JXPathContext.newContext(mavenProject.getModel());
    }

    public PomTestWrapper(MavenProject mavenProject) {
        this.mavenProject = Objects.requireNonNull(mavenProject, "mavenProject cannot be null");
        context = JXPathContext.newContext(mavenProject.getModel());
    }

    public MavenProject getMavenProject() {
        return mavenProject;

import org.apache.maven.project.MavenProject;
import org.apache.maven.project.ProjectSorter;

/**
 * Describes the interdependencies between projects in the reactor.
 *
 */
public class DefaultProjectDependencyGraph implements ProjectDependencyGraph {

    private final ProjectSorter sorter;

    private final List<MavenProject> allProjects;

    private final Map<MavenProject, Integer> order;

        assertEquals(List.of(mavenProject, child), List.copyOf(optionalProjectsBySelectors));
    }

    private MavenProject createMavenProject(String artifactId) {
        MavenProject mavenProject = new MavenProject();
        mavenProject.setGroupId("org.apache.maven");
        mavenProject.setArtifactId(artifactId);
        mavenProject.setVersion("1.0");
        mavenProject.setFile(new File(artifactId, "some-dir"));

    // of the values from a MavenProject. Ideally this should be something internal and nothing outside Maven
    // would ever need this so it should not be exposed in a public API
    MavenProject buildStandaloneSuperProject(ProjectBuilderConfiguration configuration) throws ProjectBuildingException;

    public static final MavenProject A = new MavenProject();

    public static final MavenProject B = new MavenProject();

    public static final MavenProject C = new MavenProject();

    public static final MavenProject X = new MavenProject();

    public static final MavenProject Y = new MavenProject();

    public static final MavenProject Z = new MavenProject();

    }

    @Test
    void testAllPhase() {
        MavenProject c1 = new MavenProject();
        c1.setArtifactId("c1");
        c1.setCollectedProjects(List.of());
        MavenProject c2 = new MavenProject();
        c2.setArtifactId("c2");
        c2.setCollectedProjects(List.of());
        MavenProject p = new MavenProject();
        p.setArtifactId("p");
        p.setCollectedProjects(List.of(c1, c2));

        // draw the NPE.
        project.getId();
    }

    @Test
    void testEmptyConstructor() {
        MavenProject project = new MavenProject();

        assertEquals(
                MavenProject.EMPTY_PROJECT_GROUP_ID + ":" + MavenProject.EMPTY_PROJECT_ARTIFACT_ID + ":jar:"
                        + MavenProject.EMPTY_PROJECT_VERSION,
                project.getId());
    }

    @Test

    public List<MavenProject> markAsFinished(MavenProject mavenProject) {
        finishedProjects.add(mavenProject);
        return getSchedulableNewProcesses(mavenProject);
    }

    private List<MavenProject> getSchedulableNewProcesses(MavenProject finishedProject) {
        List<MavenProject> result = new ArrayList<>();
        // schedule dependent projects, if all of their requirements are met

    }

    private List<MavenProject> getChildProjects(MavenProject parent, MavenExecutionRequest request) {
        final List<MavenProject> children = parent.getCollectedProjects();
        if (children != null && request.isRecursive()) {
            return children;
        } else {
            return new ArrayList<>();
        }
    }

    private Optional<MavenProject> findOptionalProjectBySelector(

        }
    }

    public boolean isBlackListed(MavenProject project) {
        return blackList.contains(getProjectKey(project));
    }

    private static String getProjectKey(MavenProject project) {
        return ArtifactUtils.versionlessKey(project.getGroupId(), project.getArtifactId());
    }

    public void registerBuildFailure(MavenProject project, Exception error, String task, long time) {