private PluginHelper pluginHelper;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        pluginHelper = new PluginHelper() {
            protected String[] getRepositories() {
                return new String[] { "plugin/repo1/", "plugin/repo2/" };
            }

            protected String getRepositoryContent(String url) {
                if (url.endsWith("/")) {

                @Override
                public Artifact[] load(final ArtifactType key) {
                    final List<Artifact> list = new ArrayList<>();
                    for (final String url : getRepositories()) {
                        if (url.endsWith(".yaml")) {
                            if (key == ArtifactType.UNKNOWN) {
                                list.addAll(loadArtifactsFromRepository(url));