}

    protected MavenProject getProject(Artifact pom, boolean allowStub) throws Exception {
        ProjectBuildingRequest configuration = new DefaultProjectBuildingRequest();
        configuration.setLocalRepository(getLocalRepository());
        initRepoSession(configuration);

        return projectBuilder.build(pom, allowStub, configuration).getProject();
    }

    /**

                    .getUpstreamProjects(projectBuild.getProject(), false)
                    .isEmpty()) {
                result.add(projectBuild.getProject());
            }
        }
        if (result.isEmpty() && projectBuilds.size() > 0) {
            // Must return at least one project
            result.add(projectBuilds.get(0).getProject());
        }
        return new ArrayList<>(result);
    }

        File pom = getProject("project-basic");
        MavenSession session = createMavenSession(pom);
        Plugin plugin = mojoDescriptorCreator.findPluginForPrefix("clean", session);
        assertNotNull(plugin);
    }

    @Test
    void testSetupMojoExecution() throws Exception {
        File pom = getProject("mojo-configuration");

        nonTransitiveUpstreamProjects = dependencyGraph.getUpstreamProjects(getProject(), false);
        transitiveUpstreamProjects = dependencyGraph.getUpstreamProjects(getProject(), true);
    }

    public MavenSession getSession() {
        return session;
    }

    public MavenProject getProject() {
        return project;
    }

    public TaskSegment getTaskSegment() {

        return items.isEmpty();
    }

    /**
     * @return a set of all the projects managed by the build
     */
    public Set<MavenProject> getProjects() {
        return items.stream().map(ProjectSegment::getProject).collect(Collectors.toSet());
    }

        }
        return mavenSession;
    }

    @Override
    public List<Project> getProjects(List<MavenProject> projects) {
        return projects == null ? null : map(projects, this::getProject);
    }

    @Override
    public Project getProject(MavenProject project) {
        return allProjects.computeIfAbsent(project.getId(), id -> new DefaultProject(this, project));
    }

                return result.getProject();
            }
        }
        return null;
    }

    private void assertResultShowNoError(List<ProjectBuildingResult> results) {
        for (ProjectBuildingResult result : results) {
            assertThat(result.getProblems(), is(empty()));
            assertNotNull(result.getProject());
        }
    }

    @Test

        // load everything...
        MavenProject project0 = getProject(pom0);
        MavenProject project1 = getProject(pom1);
        MavenProject project2 = getProject(pom2);
        MavenProject project3 = getProject(pom3);
        MavenProject project4 = getProject(pom4);
        MavenProject project5 = getProject(pom5);

        assertEquals("p4", project4.getName());

        cd.setRoleClass(AbstractMavenLifecycleParticipant.class);
        container.addComponentDescriptor(cd);

        Maven maven = container.lookup(Maven.class);
        File pom = getProject("lifecycle-listener-dependency-injection");
        MavenExecutionRequest request = createMavenExecutionRequest(pom);
        request.setGoals(Arrays.asList("validate"));

    }

    @Override
    public Session getSession() {
        return session;
    }

    @Override
    public Optional<Project> getProject() {
        return Optional.ofNullable(delegate.getProject()).map(session::getProject);
    }

    @Override
    public Optional<MojoExecution> getMojoExecution() {