// 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

            }
        }
        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())

            session.setParallel(parallel);

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

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

        return project;
    }

    private MavenProject getMavenProject(String artifactId) {
        MavenProject mavenProject = new MavenProject();
        mavenProject.setGroupId(GROUP_ID);
        mavenProject.setArtifactId(artifactId);
        mavenProject.setVersion("1.0");
        mavenProject.setPomFile(new File(artifactId, "pom.xml"));
        mavenProject.setCollectedProjects(new ArrayList<>());

    protected Model buildPom(RepositorySystemSession session, MavenProject project, ModelSource src)
            throws ModelBuilderException {
        ModelBuilderResult result = buildModel(session, src);
        Model model = result.getRawModel();
        return transformPom(model, project);
    }

    protected Model buildBomWithoutFlatten(RepositorySystemSession session, MavenProject project, ModelSource src)

        InternalMavenSession session = Mockito.mock(InternalMavenSession.class);
        ArtifactManager artifactManager = Mockito.mock(ArtifactManager.class);
        MavenProject mavenProject = new MavenProject();
        project = new DefaultProject(session, mavenProject);
        artifact = Mockito.mock(ProducedArtifact.class);
        artifactPath = Paths.get("");
        DefaultVersionParser versionParser =

        Files.delete(tempFile);
        try (InputStream expected = Files.newInputStream(beforePomFile)) {
            Model model = new Model(new MavenStaxReader().read(expected));
            MavenProject project = new MavenProject(model);
            project.setOriginalModel(model);
            ConsumerPomArtifactTransformer t = new ConsumerPomArtifactTransformer((s, p, f) -> {
                try (InputStream is = f.openStream()) {

    DeployRequest remapDeployArtifacts(RepositorySystemSession session, DeployRequest request);

    void injectTransformedArtifacts(RepositorySystemSession session, MavenProject currentProject) throws IOException;

    void transform(MavenProject project, RepositorySystemSession session, ModelSource src, Path tgt)
            throws ModelBuilderException, XMLStreamException, IOException;

                        .requestType(ModelBuilderRequest.RequestType.BUILD_PROJECT)
                        .build())
                .getEffectiveModel();

        MavenProject project = new MavenProject(orgModel);
        project.setOriginalModel(new org.apache.maven.model.Model(orgModel));
        Model model = builder.build(session, project, Sources.buildSource(file));

        assertNotNull(model);

        List<ProjectBuildingResult> results = projectBuilder.build(List.of(pom), true, configuration);
        assertEquals(2, results.size());
        MavenProject p1 = results.get(0).getProject();
        MavenProject p2 = results.get(1).getProject();
        MavenProject parent = p1.getArtifactId().equals("parent") ? p1 : p2;
        assertEquals(List.of("child"), parent.getModel().getDelegate().getSubprojects());
    }

    @Test