@Test
public void getExpandableProperties_NotSimpleType() {

    Map<String, Map<String, String>> expectedResult = new HashMap<>();
    expectedResult.put("a", Collections.singletonMap("z", "w"));
    Map<String, Map<String, String>> resultMap = collectionEditorSingletonDOMElementFactorySpy.getExpandablePropertiesMap(FULL_FACT_CLASSNAME);
    assertEquals(expectedResult, resultMap);
}