TDD Assessment

This project uses bun to run, bundle and test the code.

To install dependencies:

bun install

To run tests:

bun run test

To bundle the code:

bun run bundle

The Problem:

Steps:

• Create a simple String calculator with a method signature like this:

int add(string numbers)

Input: a string of comma-separated numbers Output: an integer, sum of the numbers

Examples: Input: “”, Output: 0 Input: “1”, Output: 1 Input: “1,5”, Output: 6

• Allow the add method to handle any amount of numbers.

• Allow the add method to handle new lines between numbers (instead of commas). ("1\n2,3" should return 6)

• Support different delimiters:

To change the delimiter, the beginning of the string will contain a separate line that looks like this: "//[delimiter]\n[numbers…]". For example, "//;\n1;2" where the delimiter is ";" should return 3.

• Calling add with a negative number will throw an exception: "negative numbers not allowed <negative_number>".

• If there are multiple negative numbers, show all of them in the exception message, separated by commas.

• Numbers bigger than 1000 should be ignored, so adding 2 + 1001 = 2

• Delimiters can be of any length with the following format: “//[delimiter]\n” for example: “//[]\n12***3” should return 6

• Allow multiple delimiters like this: “//[delim1]\n” for example “//[]\n12%3” should return 6.

• Allow multiple delimiters with length longer than one char like this: “//[]\n12%3” should return 6.