@Test
void runDeMarchiProcessEmptyColumns() throws Exception {

  final Configuration configuration = getConfiguration();
  configuration.setProcessEmptyColumns(true);
  impl.execute(configuration);
  verify(resultReceiver, atLeastOnce()).receiveResult(ind.capture());
  assertThat(ind.getAllValues())
      .as("empty column should only form IND with column of same type")
      .hasSize(2)
      .contains(emptyColumnOnLhs());
}