/**
     * Set the group ID of the extension's artifact.
     *
     * @param groupId a groupId object.
     */
    public void setGroupId(String groupId) {
        this.groupId = groupId;
    } // -- void setGroupId( String )

    /**
     * Set the version of the extension.
     *
     * @param version a version object.
     */
    public void setVersion(String version) {

            model.setModelVersion("4.0.0");
            model.setGroupId(groupId);
            model.setArtifactId(artifactId);
            model.setVersion(version);
            model.setBuild(new Build());
            project = new MavenProject(model);
        }

        public ProjectBuilder setGroupId(String groupId) {
            project.setGroupId(groupId);
            return this;
        }

    }

    @Test
    void testDependencies() {
        DependencyManagement dm = new DependencyManagement();
        Dependency d1 = new Dependency();
        d1.setGroupId("myGroupId");
        assertNotNull(dm.getDependencies());
        assertEquals(0, dm.getDependencies().size());
        dm.addDependency(d1);
        assertNotNull(dm.getDependencies());

     */
    ModelData(ModelSource source, Model model, String groupId, String artifactId, String version) {
        this.source = source;
        this.model = model;
        setGroupId(groupId);
        setArtifactId(artifactId);
        setVersion(version);
    }

    public ModelSource getSource() {
        return source;
    }

    /**
     * Gets the model being wrapped.
     *

        Dependency dependency2 = new Dependency();
        dependency2.setArtifactId("dep2");

        project = new Project();
        project.setModelVersion("4.0.0");
        project.setGroupId("org.apache.maven");
        project.setArtifactId("maven-core");
        project.setName("Maven");
        project.setVersion("2.0-SNAPSHOT");
        project.setScm(new Scm());

    @Override
    public void selectVersion(String version) {
        artifact.selectVersion(version);
    }

    /** {@inheritDoc} */
    @Override
    public void setGroupId(String groupId) {
        artifact.setGroupId(groupId);
    }

    /** {@inheritDoc} */
    @Override
    public void setArtifactId(String artifactId) {
        artifact.setArtifactId(artifactId);
    }

    //
    // ----------------------------------------------------------------------

    public PluginDescriptor() {}

    public PluginDescriptor(PluginDescriptor original) {
        this.setGroupId(original.getGroupId());
        this.setArtifactId(original.getArtifactId());
        this.setVersion(original.getVersion());
        this.setGoalPrefix(original.getGoalPrefix());

        super();
    }

    @Test
    public void testResolveParentThrowsUnresolvableModelExceptionWhenNotFound() throws Exception {
        final Parent parent = new Parent();
        parent.setGroupId("ut.simple");
        parent.setArtifactId("artifact");
        parent.setVersion("0");

        UnresolvableModelException e = assertThrows(
                UnresolvableModelException.class,

                // GroupId
                String orgGroupId = model.getGroupId();
                String intGroupId = interpolate(orgGroupId);
                if (orgGroupId != intGroupId) {
                    model.setGroupId(intGroupId);
                }
                // ArtifactId
                String orgArtifactId = model.getArtifactId();
                String intArtifactId = interpolate(orgArtifactId);

        request.setPom(project.getModel());

        try {
            PluginPrefixResult result = pluginPrefixResolver.resolve(request);

            Plugin plugin = new Plugin();
            plugin.setGroupId(result.getGroupId());
            plugin.setArtifactId(result.getArtifactId());

            return plugin;
        } catch (NoPluginFoundForPrefixException e) {
            return null;
        }
    }