Project restart. Back to skeleton. Empty string test is a failure.
Test success.
Code modified to return 0 only when the string is empty.
Added test for null string.
Added single digit test.
Test success.
Added two digit test.
Refactoring. Splitting and int conversion are separate functions. As well as summing up the array of integers.
Added many digit test.
Test successful.
Newline splitting test added.
Test successful.
Delimiter modifier test added.
Test successful.
Refactoring. Parsing delimiter and sanitizing input from delimiter stuff are now separate functions.
Special regex char delimiter test added.
Test successful
Delimiter + newline split test added. Due to implementation, already successful.
Negative numbers not allowed test added.
Test successful