1.
FoxUnit in Depth
Eric Selje

2.
About this session
Unit Testing and How to Do It
Level: Anyone who wants to code better
Pre-requisites: Have written code with bugs
at any time in your career.

3.
FoxUnit in Depth
Eric Selje
Madison, WI
@EricSelje
Salty Dog Solutions, LLC
Database Developer
General IT Guy

4.
Agenda
You will learn:
o What unit testing is
o What unit testing is NOT
o What is FoxUnit
o How to Run Unit Tests in FoxUnit

5.
Goal
By the end of this session you should be very
eager and very comfortable with how to create
Unit Tests in FoxUnit.

6.
What is “Unit Testing?”
• Code that “tests” your application’s code
• Tests ensure your code does what you expect

7.
You have already done this

8.
Reason This is Bad #1:
Designed for Success

9.
Reason This is Bad#2:
Ephemeral

10.
Reason This is Bad# 3:
Manual

11.
Rules for Good Unit Tests
Don’t be afraid to fail!
You’re testing the robustness of your
code. It doesn’t make sense to only
write tests for normal expectations.

12.
Rules for Good Unit Tests
Multiple Tests per Method
Multiple Tests per Method
Multiple Tests per Method
Multiple Tests per Method
Multiple Tests per Method

13.
Rules for Good Unit Tests
Each class that you’re testing should be
in its own “test class.”

14.
Rules for Good Unit Tests
Code stuck in event methods and other
parts of the GUI are UNTESTABLE.

15.
Write Testable Code
Use Business Objects
• Keep your methods focused on a single task
Don’t put any code in GUI except code for the user interface
• Forms
• Controls (Buttons, TextBoxes)
• Events (Click(), LostFocus())

16.
Rules for Good Unit Tests
Test One Thing at a Time

17.
Rules for Good Unit Tests
Quick!
Easy to Read

18.
FoxUnit
FRAMEWORK for unit testing within Visual FoxPro
• Manages our Test Classes
• Makes tests easy to run and parse results
• Can be part of a Continuous Integration system
Has been around since 2004

19.
Installing FoxUnit
VFPx
 Subversion
Download from Releases Page
https://vfpx.svn.codeplex.com/svn/FoxUnit.

20.
Installing FoxUnit
Thor
• AutoUpdates
• Toolbar
• Hot Key

21.
FoxUnit Demo
 Tour of FoxUnit
 Configuration Options
 Creating Test Classes and Tests
 Running Tests
 Command Line

22.
FoxUnit Demo
Class to Test = String
Emulates C#’s String Class
String.Format(“Hello, {0}!”, “Phoenix”)

23.
Strategy
Old Code:
Before you refactor, write unit tests
New Code:
Start doing Test Driven Development

24.
Test Driven Development
Write tests FIRST for all new functionality
e.g.
String.Concat(“Hello”, “Phoenix”)
String.Remove(“Mississippi”, “iss”)

25.
Continuous Integration
AUTOMATE your unit tests
The Continuous Integration Cycle

26.
Continuous Integration
Add this to whatever CI system you use:
Vfp9.exe -t -a –c<path>config.fpw
<path>FoxUnitFXU.prg
createFxuResultsAddAllTestsAndRun

27.
Continuous Integration
Results stored in
 Results.xml
 DetailedResults.txt
 Foxunit.Debug.txt
Parse your results

28.
Goal?
Are you eager and comfortable with how to create
Unit Tests in FoxUnit?

29.
Thank You Sponsors!
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Remember to fill out your evaluation.
Session white paper and code samples
will be updated in perpetuity.