Test Writing: BinaryTree Count Equal Children

Created By: Geoffrey Challen

/ Version: 2021.10.0

Create a method named countEqualChildren that accepts a single BinaryTree<*>? and counts the number of nodes in the tree that have two children with the same value. Keep in mind that not every node has a right or left child, so you'll need to check for null carefully. (Or use try-catch!) However, you can assume that all of the values in the tree are non-null.

For reference, cs125.trees.BinaryTree is defined like this:

Test Design Challenge

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

• Provide a public class named TestBinaryTreeCounter with a single non-private class 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