@BeforeClass
    public static void beforeClass() {
        AssetManager assetManager = new DesktopAssetManager(true);
        material = new Material(assetManager, "Common/MatDefs/Gui/Gui.j3md");
    }
Tests the methods on classes that implements the JmeExporter interface.
jme3-plugins/src/test/java/com/jme3/export/JmeExporterTest.java