Added two test for non 0,1,2 numbers
Code modified to pass tests
Added test for 3 numbers.Fail
Code changed to pass test
Added test for \n divider
Added new divider in code. Tests passed
Added test with default delimiter. Fail
Method fixed for default delimiter
Added mixed delimiters test. Fail
Fix error to pass tests
Added tests for negative numbers. Tests passed(!)
Code refactored to add processing negative numbers
Code modified to throw exceptions for negative numbers
Test refactored. Separated tests with exceptions
Added test for negatives with delimiters