tpierrain/kata-string-calculator

String calculator kata

StringCalculator kataKata

Steps:

1. Create a String calculator with a method int Add(string numbers)

1. The method can take 0, 1, or 2 numbers and will return their sum.
2. Example inputs: "", "1", or "1,2"
3. Start with the simplest test case of an empty string. Then 1 number. Then 2 numbers.
4. Remember to refactor after each passing test.

2. Allow the Add method to handle an unknown number of arguments/numbers.

3. Allow the Add method to handle new lines between numbers (instead of commas)

1. Example: “1\n2,3” should return 6
2. Example: “1,\n” is invalid, but you don’t need a test for this case.
3. Only test correct inputs – there is no need to deal with invalid inputs for this kata.

4. Allow the Add method to handle a different delimiter:

1. To change the delimiter, the beginning of the string will contain a separate line that looks like this: "//[delimiter]\n[numbers]"
   • Example: "//;\n1;2" should return 3 (the delimiter is ;)
2. This first line is optional; all existing scenarios (using , or \n) should work as before.

5.Calling Add with a negative number will throw an exception "Negatives not allowed: "listing all negative numbers that were in the list of numbers

1. Example “-1,2” throws "Negatives not allowed: -1"
2. Example “2,-4,3,-5” throws "Negatives not allowed: -4,-5"

6.Numbers bigger than 1000 should be ignored

1. Example: “1001,2” returns 2