Test Writing: String Duplicate Words Ignore Case

Created By: Geoffrey Challen

/ Version: 2021.9.0

Given a String containing words separated by the " " (space) character, write a method hasDuplicateWords that returns true if any word appears twice in the String. Also, you should ignore case: so "Chuchu" and "chuchu" are considered the same word. require that the passed String is not null.

So, for example, given the String "Wow that is amazing", you would return false, but given the String "Chuchu chuchu xyz" you would return true.

Our intention is for you to solve this problem using a Set, but there are also solutions that use a Map. You should not use a nested loop to solve this problem. You may want to use the lowercase method of Kotlin Strings.

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