public MavenProject(Model model) {
        setModel(model);
    }

    public MavenProject(MavenProject project) {
        deepCopy(project);
    }

    public File getParentFile() {
        return parentFile;
    }

    public void setParentFile(File parentFile) {
        this.parentFile = parentFile;
    }

    // ----------------------------------------------------------------------

     *
     * @param mavenProject The project
     * @return The list of builds that are eligible for starting now that the provided project is done
     */
    public List<MavenProject> markAsFinished(MavenProject mavenProject) {
        finishedProjects.add(mavenProject);
        return getSchedulableNewProcesses(mavenProject);
    }

    private List<MavenProject> getSchedulableNewProcesses(MavenProject finishedProject) {

        dependency.setGroupId(mavenProject.getGroupId());
        dependency.setVersion(mavenProject.getVersion());
        return dependency;
    }

    private static MavenProject createProject(List<Dependency> dependencies, String artifactId) {
        MavenProject result = new MavenProject();
        result.setGroupId("org.apache");
        result.setArtifactId(artifactId);

    }

    public List<MavenProject> getUpstreamProjects(MavenProject project, boolean transitive) {
        return applyFilter(projectDependencyGraph.getUpstreamProjects(project, transitive));
    }

    private List<MavenProject> applyFilter(Collection<? extends MavenProject> projects) {
        List<MavenProject> filtered = new ArrayList<>(projects.size());

        for (MavenProject project : projects) {

            List<MavenProject> sortedProjects = graph.getSortedProjects();
            result.sort(comparing(sortedProjects::indexOf));

            result = includeAlsoMakeTransitively(result, request, graph);
        }

        return result;
    }

    private List<MavenProject> trimSelectedProjects(
            List<MavenProject> projects,
            List<MavenProject> allSortedProjects,

    }

    @Test
    void testMultiModuleProjectProgress() {
        // prepare
        MavenProject project1 = generateMavenProject("Apache Maven Embedder 1");
        MavenProject project2 = generateMavenProject("Apache Maven Embedder 2");
        MavenProject project3 = generateMavenProject("Apache Maven Embedder 3");

        MavenSession session = mock(MavenSession.class);

    }

    @Test
    void testMatchingArtifactIdsDifferentGroupIds() throws Exception {
        List<MavenProject> projects = new ArrayList<>();
        MavenProject project1 = createProject("groupId1", "artifactId", "1.0");
        projects.add(project1);
        MavenProject project2 = createProject("groupId2", "artifactId", "1.0");
        projects.add(project2);

     */
    private List<MavenProject> allProjects;

    private MavenProject topLevelProject;

    private ProjectDependencyGraph projectDependencyGraph;

    private boolean parallel;

    /**
     * Plugin context keyed by project ({@link MavenProject#getId()}) and by plugin lookup key

        MavenProject mavenProject = new MavenProject();
        mavenProject.setArtifact(new DefaultArtifact("g", "a", "1.0", Artifact.SCOPE_TEST, "jar", "", null));
        File artifactFile = Files.createTempFile("foo", "tmp").toFile();
        try {
            mavenProjectHelper.attachArtifact(mavenProject, "java-source", artifactFile);
            assertEquals(1, mavenProject.getAttachedArtifacts().size());

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;