https://github.com/meleu/isbn13

Checking if ISBN-13 code is valid.
https://github.com/meleu/isbn13

Last synced: 2 days ago
JSON representation

Checking if ISBN-13 code is valid.

• Host: GitHub
• URL: https://github.com/meleu/isbn13
• Owner: meleu
• Created: 2023-07-27T18:43:27.000Z (over 1 year ago)
• Default Branch: master
• Last Pushed: 2023-07-27T19:19:08.000Z (over 1 year ago)
• Last Synced: 2024-11-08T06:13:10.895Z (about 2 months ago)
• Language: Ruby
• Size: 10.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# ISBN-13 Checker

Calculate the check digit of ISBN-13 barcodes.

## Check Digit Calculation

The logic responsible to calculate the ISBN-13 check digit is in the `#check_digit` method, in the [lib/isbn_checker.rb](lib/isbn_checker.rb#L12-L27) file.

## Installation

It's assumed you have Ruby 3.1+ installed.

```sh

git clone [email protected]:meleu/isbn13.git

cd isbn13

bundle install

```

## Running the tests

Just run `rake` and that's enough. Example:

```

$ rake

#initialize

  raises InvalidIsbnError if argument has less than 12 digits

  raises InvalidIsbnError if argument has more than 13 digits

#check_digit

  returns the correct check digit (4) for 978014300723

#valid

  validates 9780143007234

  validates existing ISBNs from some classic books

  reject invalid ISBNs

Finished in 0.00326 seconds (files took 0.15032 seconds to load)

6 examples, 0 failures

Coverage report generated for RSpec to ./coverage. 49 / 49 LOC (100.0%) covered.

```

### Code Coverage Report

After running the tests you can check the coverage report in `coverage/index.html`.

There's also a GitHub Action configured to show the code coverage report as a

comment of the Pull Requests. [Here's an example.](https://github.com/meleu/isbn13/pull/1#issuecomment-1654254433)

## CLI

I also added a little CLI to validate ISBN-13 codes.

Usage:

```

./isbncheck 

```

Examples:

```

$ ./isbncheck 9780143007234

✅ '9780143007234' is a valid ISBN-13 code

$ ./isbncheck 9780143007235

❌ '9780143007235' is an invalid ISBN-13 code

$ ./isbncheck 978-014-300-7234

✅ '978_014_300_7234' is a valid ISBN-13 code

$ ./isbncheck 978-014-30

❌ [ERROR]: invalid number of digits: 978-014-30

```