new EqualsTester()
        .addEqualityGroup(f, Functions.constant("correct"))
        .addEqualityGroup(Functions.constant("incorrect"))
        .addEqualityGroup(Functions.toStringFunction())
        .addEqualityGroup(g)
        .testEquals();

    new EqualsTester()
        .addEqualityGroup(g, Functions.<@Nullable Object>constant(null))
        .addEqualityGroup(Functions.constant("incorrect"))

    new EqualsTester()
        .addEqualityGroup(f, Functions.constant("correct"))
        .addEqualityGroup(Functions.constant("incorrect"))
        .addEqualityGroup(Functions.toStringFunction())
        .addEqualityGroup(g)
        .testEquals();

    new EqualsTester()
        .addEqualityGroup(g, Functions.<@Nullable Object>constant(null))
        .addEqualityGroup(Functions.constant("incorrect"))

    private final EqualsTester tester = new EqualsTester();

    TypeVariableEqualsTester addEqualityGroup(Type jvmType, Type... types) {
      if (Types.NativeTypeVariableEquals.NATIVE_TYPE_VARIABLE_ONLY) {
        tester.addEqualityGroup(jvmType);
        tester.addEqualityGroup((Object[]) types);
      } else {
        tester.addEqualityGroup(Lists.asList(jvmType, types).toArray());
      }
      return this;
    }

    try {
      equalsTester.addEqualityGroup(reference, (Object[]) null);
      fail("Should fail on null equal object");
    } catch (NullPointerException e) {
    }
  }

  /**
   * Test adding objects only by addEqualityGroup, with no reference object specified in the
   * constructor.
   */
  public void testAddEqualObjectWithOArgConstructor() {
    equalsTester.addEqualityGroup(equalObject1, notEqualObject1);
    try {

    new EqualsTester()
        .addEqualityGroup(entry, Tables.immutableCell("foo", 1, 'a'))
        .addEqualityGroup(Tables.immutableCell("bar", 1, 'a'))
        .addEqualityGroup(Tables.immutableCell("foo", 2, 'a'))
        .addEqualityGroup(Tables.immutableCell("foo", 1, 'b'))
        .addEqualityGroup(
            Tables.<@Nullable Object, @Nullable Object, @Nullable Object>immutableCell(

    new EqualsTester()
        .addEqualityGroup(FALSE, Predicates.alwaysFalse())
        .addEqualityGroup(TRUE)
        .addEqualityGroup(Predicates.not(FALSE))
        .testEquals();

    new EqualsTester()
        .addEqualityGroup(Predicates.isNull(), Predicates.isNull())
        .addEqualityGroup(Predicates.notNull())
        .addEqualityGroup(Predicates.not(Predicates.isNull()))
        .testEquals();

  public void testEqualsSameContents() {
    new EqualsTester()
        .addEqualityGroup(
            getMultiset(), getSubjectGenerator().create(getSampleElements().toArray()))
        .testEquals();
  }

  @CollectionSize.Require(absent = ZERO)
  public void testNotEqualsEmpty() {
    new EqualsTester()
        .addEqualityGroup(getMultiset())
        .addEqualityGroup(getSubjectGenerator().create())
        .testEquals();
  }

  public void testWrap() {
    new EqualsTester()
        .addEqualityGroup(
            LENGTH_EQUIVALENCE.wrap("hello"),
            LENGTH_EQUIVALENCE.wrap("hello"),
            LENGTH_EQUIVALENCE.wrap("world"))
        .addEqualityGroup(LENGTH_EQUIVALENCE.wrap("hi"), LENGTH_EQUIVALENCE.wrap("yo"))
        .addEqualityGroup(
            LENGTH_EQUIVALENCE.<@Nullable String>wrap(null),

    try {
      equalsTester.addEqualityGroup(reference, (Object[]) null);
      fail("Should fail on null equal object");
    } catch (NullPointerException e) {
    }
  }

  /**
   * Test adding objects only by addEqualityGroup, with no reference object specified in the
   * constructor.
   */
  public void testAddEqualObjectWithOArgConstructor() {
    equalsTester.addEqualityGroup(equalObject1, notEqualObject1);
    try {

        .addEqualityGroup(parse("expireAfterWrite=60m"), parse("expireAfterWrite=1h"))
        .addEqualityGroup(parse("weakKeys"), parse("weakKeys"))
        .addEqualityGroup(parse("softValues"), parse("softValues"))
        .addEqualityGroup(parse("weakValues"), parse("weakValues"))
        .addEqualityGroup(parse("recordStats"), parse("recordStats"))
        .testEquals();