assertThrows(IllegalArgumentException.class, () -> ContiguousSet.closed(2L, 1L));
    assertThrows(IllegalArgumentException.class, () -> ContiguousSet.closedOpen(2L, 1L));
  }

  public void testEquals() {
    new EqualsTester()
        .addEqualityGroup(
            ContiguousSet.create(Range.closed(1, 3), integers()),
            ContiguousSet.closed(1, 3),

              }
            });
  }

  public void testEquals() {
    SortedMap<Integer, String> map1 = ImmutableSortedMap.of(1, "one");
    SortedMap<Integer, String> map2 = ImmutableSortedMap.of(2, "two");
    new EqualsTester()
        .addEqualityGroup(map1, wrap(map1), wrap(map1))
        .addEqualityGroup(map2, wrap(map2))
        .testEquals();
  }

    new EqualsTester()
        .addEqualityGroup(STR_TO_LONG, STR_TO_LONG.reverse().reverse())
        .addEqualityGroup(STR_TO_LONG.reverse(), STR_TO_LONG.reverse())
        .testEquals();
  }

  public void testReverseReverse() {
    Converter<String, Long> converter = STR_TO_LONG;
    assertEquals(converter, converter.reverse().reverse());
  }

    // return collection::iterator;
    return new Iterable<T>() {
      @Override
      public Iterator<T> iterator() {
        return collection.iterator();
      }
    };
  }

  public void testEquals() {
    new EqualsTester()
        .addEqualityGroup(ImmutableLongArray.of())
        .addEqualityGroup(
            ImmutableLongArray.of(1, 2),
            reserialize(ImmutableLongArray.of(1, 2)),

    new EqualsTester().addEqualityGroup(input, multimap).testEquals();
  }

  public void testCopyOfEmpty() {
    ArrayListMultimap<String, Integer> input = ArrayListMultimap.create();
    ImmutableListMultimap<String, Integer> multimap = ImmutableListMultimap.copyOf(input);
    new EqualsTester().addEqualityGroup(input, multimap).testEquals();
  }

  public void testCopyOfImmutableListMultimap() {

        .addEqualityGroup(BloomFilter.create(Funnels.unencodedCharsFunnel(), 200, 0.01))
        .addEqualityGroup(BloomFilter.create(Funnels.unencodedCharsFunnel(), 200, 0.02))
        .testEquals();
  }

  public void testEquals() {
    BloomFilter<String> bf1 = BloomFilter.create(Funnels.unencodedCharsFunnel(), 100);
    bf1.put("1");
    bf1.put("2");

        .addEqualityGroup(
            Hashing.concatenating(Hashing.md5(), Hashing.murmur3_32()),
            Hashing.concatenating(asList(Hashing.md5(), Hashing.murmur3_32())))
        .testEquals();
  }

  public void testConcatenatingIterable_bits() {
    assertEquals(
        Hashing.md5().bits() + Hashing.md5().bits(),
        Hashing.concatenating(asList(Hashing.md5(), Hashing.md5())).bits());

        // Same inputs but different output should have different hash code
        assertNotSame(item1.hashCode(), item4.hashCode());
    }

    public void test_equals() {
        String[] inputs1 = { "a", "b" };
        String[] inputs2 = { "b", "a" }; // Different order
        String[] inputs3 = { "c", "d" };

              }
            });
  }

  public void testEquals() {
    NavigableMap<Integer, String> map1 = ImmutableSortedMap.of(1, "one");
    NavigableMap<Integer, String> map2 = ImmutableSortedMap.of(2, "two");
    new EqualsTester()
        .addEqualityGroup(map1, wrap(map1), wrap(map1))
        .addEqualityGroup(map2, wrap(map2))
        .testEquals();
  }

            ImmutableMultiset.of("a", "a", "b"))
        .addEqualityGroup(ImmutableMultiset.of("a", "b"))
        .addEqualityGroup(ImmutableMultiset.of("a", "b", "c", "d"))
        .testEquals();
  }

  public void testIterationOrder() {
    Collection<String> c = ImmutableMultiset.of("a", "b", "a");
    assertThat(c).containsExactly("a", "a", "b").inOrder();