@Test
public void testGetServerDomainModifiedListNull() {

    MockZMSFileChangeLogStore fstore = new MockZMSFileChangeLogStore(FSTORE_PATH, null, null);
    ZMSClient zmsClient = Mockito.mock(ZMSClient.class);
    fstore.setZMSClient(zmsClient);
    Mockito.when(zmsClient.getSignedDomains(null, "true", null, null)).thenReturn(null);
    assertNull(fstore.getServerDomainModifiedList());
}