@Test
void mapNameSpace() {

    NameSpaceMapping oneNsMapping = NameSpaceMappingBuilder.of("a.b","");
    List<NameSpaceMapping> oneMapping = Collections.singletonList(oneNsMapping);
    
    SimpleNameSpaceMapper snsm = new SimpleNameSpaceMapper(oneMapping);
    assertEquals(snsm.mapNameSpace("a.b"),"");
    assertEquals(snsm.mapNameSpace("a.b.c"),"c");
    assertEquals(snsm.mapNameSpace("a.d"),"a.d");
    assertEquals(snsm.mapNameSpace(""),"");
}