@Test
@DisplayName("check invalid name mapper strategy")
void test_namemapper_Strategy_invalid() {

    assertNull(testee.convertNameMappingStrategy(null));
    assertNull(testee.convertNameMappingStrategy(this.annotationValue));
    when(this.annotationValue.getValue()).thenReturn("XXX");
    assertNull(testee.convertNameMappingStrategy(this.annotationValue));
}