anchor.diff:  
       [Test]
       [Ignore]
  -    procedure too_long_isbn;
  -
  -    [Test]
  -    [Ignore]
       procedure check_digit_of_X_should_not_be_used_for_0;
   
       [Test]
  
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]
  