1. Approval Tests
A picture’s worth a1000 tests

2. Test Structure
public void ScenarioUnderTest()
{
// Arrange
// Act
// Assert
}

3. The Classic Way
public void ScenarioUnderTest()
{
var foo = new Foo();
var actual = foo.Do();
Assert.Equal("expected", actual);
}

4. The Approvals Way
public void ScenarioUnderTest()
{
var foo = new Foo();
var actual = foo.Do();
Assert.Equal("", actual);
}

5. Approval Tests Libraries
public void ScenarioUnderTest()
{
var foo = new Foo();
var actual = foo.Do();
Approvals.Verify(actual);
}

6. Approval Tests Libraries
Available for many languages:
• Java, C#, PHP, NodeJS, Python or Ruby.
Support most (may be all) test frameworks/runners:
• JUnit, NUnit, xUnit, rSpec, etc.
Many useful reporters:
• Diff reporters: Generic, AraxisMerge, P4Merge, KDiff,
VisualStudioDiff, TortoiseDiff, WinMerge.
• CI: CruiseControl, TeamCity, Quiet.
• Misc: FileLauncher, Image, Clipboard.
Environment/Platform specific approvals:
• Web, Desktop, Reports.

7. Unleash the power
Fight with Legacy Code

8. Golden Master

9. Random Thoughts
Plus Tips & Tricks

10. Commit Approval Files

11. Intermediate Steps

12. Both High & Low Level Tests

13. Code Quality Feedback

14. • Approval Tests Library
• Author: Llewellyn Falco
• Twitter: @LlewellynFalco / #ApprovalTests
• Doc: http://approvaltests.sourceforge.net/
• Repository: https://github.com/approvals
Resources

15. Matteo Baglini
Freelance Software Developer &
Tecnical Coach
Coders TUG & DotNetToscana Co-
Founder
@matteobaglini
matteo.baglini@gmail.com

16. Thanks!