@Test
public void testPut() throws IOException {

  when(mockBulkMutation.add(any(RowMutationEntry.class))).thenReturn(future);
  BigtableBufferedMutator underTest = createMutator(new Configuration(false));
  underTest.mutate(SIMPLE_PUT);
  verify(mockBulkMutation, times(1)).add(any(RowMutationEntry.class));
}