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60# TDD Assessment
This project uses bun to run, bundle and test the code.
To install dependencies:
```bash
bun install
```
To run tests:
```bash
bun run test
```
To bundle the code:
```bash
bun run bundle
```
## The Problem:
### Steps:
1. 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
2. Allow the `add` method to handle any amount of numbers.
3. Allow the `add` method to handle new lines between numbers (instead of commas). (`"1\n2,3"` should return `6`)
4. 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`.
5. Calling add with a negative number will throw an exception: "negative numbers not allowed `<negative_number>`".
6. If there are multiple negative numbers, show all of them in the exception message, separated by commas.
7. Numbers bigger than 1000 should be ignored, so adding 2 + 1001 = 2
8. Delimiters can be of any length with the following format: “//[delimiter]\n” for example: “//[***]\n1***2***3” should return 6
9. Allow multiple delimiters like this: “//[delim1][delim2]\n” for example “//[*][%]\n1*2%3” should return 6.
10. Allow multiple delimiters with length longer than one char like this: “//[*][%]\n1*2%3” should return 6.