@Test
  public void testExecuteOnMember() {
    final IExecutorService service = client.getExecutorService(randomString());
    final String mapName = randomString();

    final Member member = instance1.getCluster().getLocalMember();
    final String targetUuid = member.getUuid();

    service.executeOnMember(new MapPutRunnable(mapName), member);

    final IMap map = client.getMap(mapName);
    assertTrueEventually(
        new AssertTask() {
          public void run() throws Exception {
            assertTrue(map.containsKey(targetUuid));
          }
        });
  }
 @Test(expected = NullPointerException.class)
 public void testExecuteOnMember_WhenMemberNull() {
   IExecutorService service = client.getExecutorService(randomString());
   service.executeOnMember(new MapPutRunnable("map"), null);
 }