@Test
void maxInd_sharedColumns_notContained() {

  final List<InclusionDependency> toCheck = asList(
      ind("wx", "yz"),
      ind("x", "y"));
  final List<InclusionDependency> expected = new ArrayList<>(toCheck);
  assertThat(util.getMax(toCheck)).hasSameElementsAs(expected);
}