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;
    }

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

        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"));

    }

    @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);

        // 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

            }
        }
        return projectLocalRepository;
    }

    private MavenProject getProject(Artifact artifact) {
        return getProject(artifact, getProjects());
    }

    private MavenProject getProject(Artifact artifact, Map<String, Map<String, Map<String, MavenProject>>> projects) {
        return projects.getOrDefault(artifact.getGroupId(), Collections.emptyMap())

                if (analyzer.getNumberOfBuilds() > 1) {
                    final List<MavenProject> newItemsThatCanBeBuilt =
                            analyzer.markAsFinished(projectBuild.getProject());
                    for (MavenProject mavenProject : newItemsThatCanBeBuilt) {
                        ProjectSegment scheduledDependent = projectBuildList.get(mavenProject);
                        logger.debug("Scheduling: {}", scheduledDependent);

                .build(Collections.singletonList(pomFile), false, configuration);
        assertEquals(1, results.size());
        MavenProject mavenProject = results.get(0).getProject();
        assertEquals(1, mavenProject.getArtifacts().size());

        final MavenProject project = mavenProject;
        final AtomicInteger artifactsResultInAnotherThread = new AtomicInteger();
        Thread t = new Thread(new Runnable() {

    }

    private MavenProject createMavenProject(String artifactId) {
        MavenProject project = new MavenProject();
        project.setGroupId("test");
        project.setArtifactId(artifactId);
        return project;
    }

    private Dependency toDependency(MavenProject mavenProject) {
        Dependency dependency = new Dependency();

            session.setParallel(parallel);

            ProjectDependencyGraph dependencyGraph = session.getProjectDependencyGraph();
            MavenProject rootProject = session.getTopLevelProject();

            Map<MavenProject, List<MavenProject>> allProjects = new LinkedHashMap<>();
            dependencyGraph
                    .getSortedProjects()