StringCalculator is a simple Ruby class that has a class method add which adds numbers provided as a string supporting custom delimiters, including commas and new lines, but raises exception when negative numbers are present.

• Addition of numbers provided as a string
• Support for different delimiters (comma, new line, custom delimiter)
• Handling of negative numbers
• Unit tests using RSpec for ensuring correctness

To use the String Calculator, follow these steps:

1. Clone the repository:

   git clone [email protected]:ssaha777/string_calculator.git
   

2. Install dependencies:

   bundle install
   

3. Run the specs:

   bundle exec rspec
   

4. Execution of the calculator

   require_relative 'string_calculator'
   
   result = StringCalculator.add("1,2,3")
   puts result