unit test checking if export of empty map is working

converter-sbml/src/test/java/lcsb/mapviewer/converter/model/sbml/SbmlExporterTest.java

@@ -133,4 +133,12 @@ public class SbmlExporterTest {
     assertEquals(model.getIdModel(), deserializedModel.getIdModel());
   }
 
+  @Test
+  public void testExportEmptyModel() throws Exception {
+    Model model = new ModelFullIndexed(null);
+    Model deserializedModel = getModelAfterSerializing(model);
+
+    assertNotNull(deserializedModel);
+  }
+
 }