@Test
public void testHashCode() {

  Set<MinimalZipEntry> hashSet = new HashSet<>();
  hashSet.add(defaultEntry);
  hashSet.add(clonedDefaultEntry);
  Assert.assertEquals(1, hashSet.size());
  hashSet.addAll(allMutations);
  Assert.assertEquals(1 + allMutations.size(), hashSet.size());
}