### Question:
VnfAdapterVolumeGroupResources { public DeleteVolumeGroupRequest deleteVolumeGroupRequest(RequestContext requestContext, CloudRegion cloudRegion, ServiceInstance serviceInstance, VolumeGroup volumeGroup) throws IOException { return vnfAdapterObjectMapper.deleteVolumeGroupRequestMapper(requestContext, cloudRegion, serviceInstance, volumeGroup); }  CreateVolumeGroupRequest createVolumeGroupRequest(RequestContext requestContext, CloudRegion cloudRegion,
            OrchestrationContext orchestrationContext, ServiceInstance serviceInstance, GenericVnf genericVnf,
            VolumeGroup volumeGroup, String sdncVfModuleQueryResponse); DeleteVolumeGroupRequest deleteVolumeGroupRequest(RequestContext requestContext, CloudRegion cloudRegion,
            ServiceInstance serviceInstance, VolumeGroup volumeGroup);  }### Answer:
@Test public void test_deleteVolumeGroup() throws Exception { DeleteVolumeGroupRequest deleteVolumeGroupRequest = new DeleteVolumeGroupRequest(); doReturn(deleteVolumeGroupRequest).when(MOCK_vnfAdapterObjectMapper) .deleteVolumeGroupRequestMapper(requestContext, cloudRegion, serviceInstance, volumeGroup); DeleteVolumeGroupRequest expectedDeleteVolumeGroupRequest = new DeleteVolumeGroupRequest(); DeleteVolumeGroupRequest actualDeleteVolumeGroupRequest = vnfAdapterVolumeGroupResources .deleteVolumeGroupRequest(requestContext, cloudRegion, serviceInstance, volumeGroup); verify(MOCK_vnfAdapterObjectMapper, times(1)).deleteVolumeGroupRequestMapper(requestContext, cloudRegion, serviceInstance, volumeGroup); assertThat(expectedDeleteVolumeGroupRequest, Matchers.sameBeanAs(actualDeleteVolumeGroupRequest)); }