created initial tests for Puppy, PurchaseRequest, Customer, & PuppyList classes
added test cases for class Breeder to initialize, add purchase request, add puppy for sale, print purchase requests, make transaction, & view completed purchases
created puppy class with initialize method
added def before initialize
added initialize method to set breed and color for the purchase request
added initialize and create purchase request methods for class Customer and initialize and add methods to class PuppyList
dwi
working version of PuppyBreeder program