section: 3
tags: lab02 lab
title: /Labs/02/First Experiments
type: text/vnd.tiddlywiki

Let's introduce the concept of automated testing using a very simple calculator class.  It will have an `add` method and a `multiply` method, each of which takes two integer parameters and returns the integer result to the caller.

The class diagram looks like:

[[plantuml[
@startuml
skinparam {
	skinparam backgroundColor #ffffff77
   Style strictuml
   RoundCorner 5
   Padding 2
   NodeSep 100
   Class {
      AttributeIconSize 0
      FontSize 15
   }
}

class Calculator {
--
  + add(x : Integer, y : Integer) : Integer
  + multiply(x : Integer, y : Integer) : Integer
}
@enduml
]]]