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);

            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();

            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();

        DomBuilder builder = new DomBuilder(parent)
        cl.delegate = builder
        cl.call()
        return builder.elements[0]
    }

    public static void leftShift(Node parent, Node node) {
        parent.appendChild(parent.ownerDocument.importNode(node, true))
    }

    public static void addFirst(Node parent, Closure cl) {
        DomBuilder builder = new DomBuilder(parent.ownerDocument, null)