File artifactFile = Files.createTempFile("foo", "tmp").toFile();
        try {
            mavenProjectHelper.attachArtifact(mavenProject, "java-source", artifactFile);
            assertEquals(1, mavenProject.getAttachedArtifacts().size());
            mavenProjectHelper.attachArtifact(mavenProject, "java-source", artifactFile);
            assertEquals(1, mavenProject.getAttachedArtifacts().size());
        } finally {

        artifact.setFile(artifactFile);
        artifact.setResolved(true);

        attachArtifact(project, artifact);
    }

    @Override
    public void attachArtifact(MavenProject project, String artifactType, File artifactFile) {
        ArtifactHandler handler = artifactHandlerManager.getArtifactHandler(artifactType);

    private DefaultProjectManager projectManager;

    private Project project;

    private ProducedArtifact artifact;

    private Path artifactPath;

    @Test
    void attachArtifact() {
        InternalMavenSession session = Mockito.mock(InternalMavenSession.class);
        ArtifactManager artifactManager = Mockito.mock(ArtifactManager.class);
        MavenProject mavenProject = new MavenProject();

     * @see org.apache.maven.api.Type
     */
    default void attachArtifact(
            @Nonnull Session session, @Nonnull Project project, @Nonnull String type, @Nonnull Path path) {
        ProducedArtifact artifact = session.createProducedArtifact(
                project.getGroupId(), project.getArtifactId(), project.getVersion(), null, null, type);
        attachArtifact(project, artifact, path);
    }

    /**

 * of the public API. In particular, this class can be changed or deleted without prior notice. Use
 * {@link org.apache.maven.project.MavenProjectHelper#attachArtifact} instead.
 */
@Deprecated
public class AttachedArtifact extends DefaultArtifact {

    private final Artifact parent;

            // This is necessary to avoid creating compatibility problems for existing plugins that use
            // MavenProjectHelper.attachArtifact(..).
            try {
                MojoExecutionEvent mojoExecutionEvent = new MojoExecutionEvent(session, project, mojoExecution, mojo);
                mojoExecutionListener.beforeMojoExecution(mojoExecutionEvent);

        result.addAll(getAttachedArtifacts(project));
        return Collections.unmodifiableCollection(result);
    }

    @Override
    @SuppressWarnings("deprecation")
    public void attachArtifact(@Nonnull Project project, @Nonnull ProducedArtifact artifact, @Nonnull Path path) {
        requireNonNull(project, "project cannot be null");
        requireNonNull(artifact, "artifact cannot be null");

            dom = new Xpp3Dom(dom);
        }

        return dom;
    }

    /**
     * @deprecated Use MavenProjectHelper.attachArtifact(..) instead.
     */
    @Deprecated
    public void attachArtifact(String type, String classifier, File file) {}

    /**
     * @deprecated Use {@link org.apache.maven.model.io.ModelWriter}.
     */
    @Deprecated