Test Writing: String Character Sum

Created By: Geoffrey Challen

/ Version: 2021.2.0

Write a function called characterSum that sums the characters in a String and returns the result as an int. If the String is null you should return 0.

You should sum the characters based on their character code value, like this:

There are several ways to approach this problem. Note that, in Kotlin, you can use bracket notation to index into a String:

Test Design Challenge

You're challenge is to write tests for this problem described above.

• Provide a method named test that accepts no arguments and does not return a value.
• If the implementation of the class described above is incorrect, your test method should throw an exception.
• If it is correct, do not throw an exception.
• You may want to use Kotlin's assert or check methods