public static PomBuilder create() {
        return new PomBuilder();
    }

    public PomBuilder modelVersion(String modelVersion) {
        this.modelVersion = modelVersion;
        return this;
    }

    public PomBuilder namespace(String namespace) {
        this.namespace = namespace;
        return this;
    }

    public PomBuilder groupId(String groupId) {

import org.eclipse.aether.RepositorySystemSession;

/**
 * This interface is not public and the purpose is to allow easy unit testing
 * of {@link ConsumerPomArtifactTransformer}.
 */
interface PomBuilder {
    Model build(RepositorySystemSession session, MavenProject project, ModelSource src)
            throws ModelBuilderException, IOException, XMLStreamException;

        void shouldUpgradeModelVersionWith41Option() throws Exception {
            // Create a test POM with 4.0.0 model version
            Path pomFile = tempDir.resolve("pom.xml");
            String originalPom = PomBuilder.create()
                    .groupId("com.example")
                    .artifactId("test-project")
                    .version("1.0.0")
                    .build();
            Files.writeString(pomFile, originalPom);

            String moduleAPomXml = PomBuilder.create()
                    .namespace("http://maven.apache.org/POM/4.1.0")
                    .modelVersion("4.1.0")
                    .groupId("com.example")
                    .artifactId("module-a")
                    .version("1.0.0")
                    .build();

            String moduleBPomXml = PomBuilder.create()

    class GAVExtractionTests {

        @Test
        @DisplayName("should extract Artifact from complete POM")
        void shouldExtractGAVFromCompletePOM() throws Exception {
            String pomXml = PomBuilder.create()
                    .groupId("com.example")
                    .artifactId("test-project")
                    .version("1.0.0")
                    .build();

    class ModelVersionDetectionTests {

        @Test
        @DisplayName("should detect model version from document")
        void shouldDetectModelVersionFromDocument() {
            String pomXml = PomBuilder.create()
                    .groupId("test")
                    .artifactId("test")
                    .version("1.0.0")
                    .build();

            Document document = Document.of(pomXml);

            Path tempDir = Files.createTempDirectory("check-test");
            try {
                Path pomFile = tempDir.resolve("pom.xml");
                String pomContent = PomBuilder.create()
                        .groupId("test")
                        .artifactId("test")
                        .version("1.0.0")
                        .build();

    private static final String BUILD_POM_CLASSIFIER = "build";

    private final Set<Path> toDelete = new CopyOnWriteArraySet<>();

    private final PomBuilder builder;

    @Inject
    ConsumerPomArtifactTransformer(PomBuilder builder) {
        this.builder = builder;
    }

    @SuppressWarnings("deprecation")
    @Override

            Path tempDir = Files.createTempDirectory("apply-test");
            try {
                Path pomFile = tempDir.resolve("pom.xml");
                String pomContent = PomBuilder.create()
                        .groupId("test")
                        .artifactId("test")
                        .version("1.0.0")
                        .build();

import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

public class ConsumerPomBuilderTest extends AbstractRepositoryTestCase {

    @Inject
    PomBuilder builder;

    @Inject
    ModelBuilder modelBuilder;

    @Override
    protected List<Object> getSessionServices() {
        List<Object> services = new ArrayList<>(super.getSessionServices());