feat: ISBN-10 and ISBN-13 validation (IGO-10)#100
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strider2038 merged 1 commit intoApr 7, 2026
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- validate.ISBN with ISBNOnly10/ISBNOnly13 and sentinel errors - it.IsISBN with Only10/Only13 and per-mode messages/errors - is.ISBN helper; EN/RU translations; tests and examples Closes IGO-10. Co-authored-by: Igor Lazarev <strider2038@yandex.ru>
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Summary
Adds ISBN validation aligned with Symfony
Isbn/IsbnValidator: strip hyphens, ISBN-10 (withXcheck digit) and ISBN-13 checksums, and “any” mode that maps 11–12 digit lengths to a type-not-recognized outcome like Symfony’s combined tests.API
validate.ISBN,validate.ISBNOnly10,validate.ISBNOnly13with sentinel errors (ErrISBNInvalidCharacters,ErrISBNTooShort,ErrISBNTooLong,ErrISBNChecksumFailed,ErrISBNTypeNotRecognized)it.IsISBN()withOnly10()/Only13(), optionalWithISBN10Message,WithISBN13Message,WithBothISBNMessage, and matching error overridesis.ISBNmessage.InvalidISBN,InvalidISBN10,InvalidISBN13(+ EN/RU catalogs),validation.ErrInvalidISBN,ErrInvalidISBN10,ErrInvalidISBN13Testing
validate/isbn_test.go(Symfony test vectors)test/constraints_identifiers_cases_test.goit,validate, andispackagesChangelog
[Unreleased]→ AddedLinear: IGO-10