Map<MavenProject, List<MavenProject>> projects = new HashMap<>();
        projects.put(p1, Collections.emptyList());
        projects.put(p2, Collections.singletonList(p1));

        BuildPlan plan = calculateLifecycleMappings(projects, "verify");
        plan.then(calculateLifecycleMappings(projects, "install"));

        Stream.of(p1, p2).forEach(project -> {

import org.apache.maven.project.CycleDetectedException;
import org.apache.maven.project.DuplicateProjectException;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.ProjectBuildingException;
import org.apache.maven.project.collector.MultiModuleCollectionStrategy;
import org.apache.maven.project.collector.PomlessCollectionStrategy;
import org.apache.maven.project.collector.RequestPomCollectionStrategy;

                plan.steps(project).forEach(step -> {
                    if (step.predecessors.stream().noneMatch(s -> s.project == project)) {
                        step.executeAfter(setup);
                    } else if (step.successors.stream().noneMatch(s -> s.project == project)) {
                        teardown.executeAfter(step);
                    }
                });

        long weightB = comparator.getProjectWeight(projectB);
        long weightC = comparator.getProjectWeight(projectC);
        long weightX = comparator.getProjectWeight(projectX);

        // Project A should have the highest weight as it's at the root
        assertTrue(weightA > weightB, "Project A should have weight > Project B");
        assertTrue(weightA > weightC, "Project A should have weight > Project C");

        MavenProject project = getProject(pom, true);

        assertNotNull(project.getArtifactId());

        assertNotNull(project.getRemoteArtifactRepositories());
        assertTrue(project.getRemoteArtifactRepositories().isEmpty());

        assertNotNull(project.getPluginArtifactRepositories());
        assertTrue(project.getPluginArtifactRepositories().isEmpty());

            project.setArtifact(projectArtifact);

            // only set those on 2nd phase, ignore on 1st pass
            if (project.getFile() != null) {
                Build build = project.getBuild().getDelegate();
                List<org.apache.maven.api.model.Source> sources = build.getSources();

     * is a prerequisite of the given project.
     *
     * @param project The project whose upstream projects should be retrieved, must not be {@code null}.
     * @param transitive A flag whether to retrieve all direct and indirect upstream projects or just the immediate
     *            upstream projects.

    @Nonnull
    public Map<String, String> getProperties(@Nonnull Project project) {
        return Collections.unmodifiableMap(
                new PropertiesAsMap(getMavenProject(project).getProperties()));
    }

    @Override
    @Nonnull
    public Optional<Project> getExecutionProject(@Nonnull Project project) {
        // Session keep tracks of the Project per project id,

        File f = getFileForClasspathResource(DIR + "project-with-scoped-dependencies.xml");

        MavenProject project = getProjectWithDependencies(f);

        Artifact artifact;

        assertNotNull(project, "Test project can't be null!");

        checkArtifactIdScope(project, "provided", "provided");
        checkArtifactIdScope(project, "test", "test");
        checkArtifactIdScope(project, "compile", "compile");

        initRepoSession(request, configuration);

        List<MavenProject> projects = new ArrayList<>();

        if (pom != null) {
            MavenProject project = projectBuilder.build(pom, configuration).getProject();

            projects.add(project);
            if (includeModules) {
                for (String module : project.getModules()) {
                    File modulePom = new File(pom.getParentFile(), module);