@Test
public void testMutateRowAsync() throws Exception {

  RowMutation rowMutation = RowMutation.create(TABLE_ID, ROW_KEY);
  when(mockDataClient.mutateRowAsync(rowMutation))
      .thenReturn(ApiFutures.<Void>immediateFuture(null));
  dataClientWrapper.mutateRowAsync(rowMutation).get();
  verify(mockDataClient).mutateRowAsync(rowMutation);
}