forked the repo and deleted all working tests
emptyString test passed
test one number added and passed
test two numbers added and passed
parse int function created and code refactored accordingly
test three numbers adden and passed
test ten numbers added and passed
splitNumbers function created and code refactored accordingly
sum function created and code refactored accordingly
test new line added. Now both new line and commast will mean: split
test new line for more than two numbers created and passed
test newline and commast in the same input, test passed
test to hadnle different delimiters added and test passed