programming

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“You will never

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you canbe faster

Practicemakes YOU

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makes YOU...

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the kaizenway

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perfect

Stringcalculator

Kata

Original kata by Roy Osherove from http://osherove.com/tdd-kata-1

1. Create a simple String calculator with a method Add(string numbers).• can take an unknown amount of numbers separated by a comma, and will return their sum• for an empty string it will return 0• for “1” it will return 1• for “1,2” it will return 3• for “5,7,10,3” it will return 25

Original kata by Roy Osherove from http://osherove.com/tdd-kata-1

2. Allow the Add method to handle new lines between numbers (instead of commas).• for “1\n2,3” it will return 6• make sure you only test for correct inputs. There is no need to test for invalid inputs for these katas

Original kata by Roy Osherove from http://osherove.com/tdd-kata-1

3. Allow the Add method to handle a different delimiter.• the beginning of the string can contain a separate line that looks like this“//[delimiter]\n[numbers…]”• for “//;\n1;2” it will return 3• for “//;\n1;2\n3;1” it will return 7

Original kata by Roy Osherove from http://osherove.com/tdd-kata-1

4. Delimiters can be of any length with the following format “//[delimiter]\n”.• for “//***\n1***2***3\n2***2” it will return 10

Original kata by Roy Osherove from http://osherove.com/tdd-kata-1

5. Calling Add with a negative number will throw an exception “negatives not allowed” - and the negative that was passed.• if there are multiple negatives, show all of them in the exception message

Original kata by Roy Osherove from http://osherove.com/tdd-kata-1

MOREKatas

onhttp://katas.softwarecraftsmanship.org/

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