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();

            // 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