String Calculator Kata in PHP

https://kata-log.rocks/string-calculator-kata

Instructions:

To execute the project, build a custom Docker image with PHP 8.2 and xDebug enabled.

FROM php:8.2-cli

# Install Xdebug
RUN pecl install xdebug \
    && docker-php-ext-enable xdebug

After running the commands:

$ make test
$ make coverage

TEST:

1. Step 1
   • "" = 0
   • "1" = 1
   • "1,2" = 3
2. Step 2
   • "3,5,1" = 9
3. Step 3
   • "1\n2,3" = 6
4. Step 4
   • "//;\n1;2" = 3 (format "//[delimiter]\n[numbers…]")
5. Step 5
   • "-1" = exception "Negatives not allowed: -1"
6. Step 6
   • "2 + 1001" = 2 (Numbers bigger than 1000 should be ignored)
7. Step 7
   • "//[]\n12***3" = 6 (format "//[delimiter]\n")
8. Step 8
   • "//[][%]\n12%3" = 6 (format //[delim1][delim2]\n)
9. Step 9
   • "//[][%%]\n33%%3" = 9 (handle multiple delimiters with length longer than one char)