anchor.diff:      [Test]
       [Ignore]
       procedure invalid_characters_are_not_ignored;
  +
  +    [Test]
  +    [Ignore]
  +    procedure input_is_too_long_but_contains_a_valid_isbn;
     end;
   
   implementation
  
positive.code:   Assert.IsTrue(TIsbn.isValid('359821507X'));
  end;
  
  procedure ISBNVerifierTest.too_long_isbn;
  begin
    Assert.IsFalse(TIsbn.isValid('3-598-21507-XX'));
  end;
  
  procedure ISBNVerifierTest.too_long_isbn_and_no_dashes;
  
negative.code:   DUnitX.TestFramework;
  
  const
    CanonicalVersion = '2.7.0';
  
  type
    [TestFixture]
  