Gabriele Lana: Testing Web Applications

Testing Web Applications Gabriele Lana www.gabrielelana.it info@gabrielelana.it

Debug Sucks Test Rocks

Why Test Automation?

Prevent Change

Hard To Change Costo Costo x Modifica nel Tempo Tempo

Always Change 60%-80% of all software is developed after first release to production

Reject Change Costo x Modifica Costo Insostenibile E' impossibile lavorarci! Rifacciamolo! Tempo

Automatic Test What = Test How = Code

Embrace Change Costo Tempo

Embrace Change = Sostenibilità

Bug Fixing

Bug Fix Costo #Bugs

#Bugs? Costo Totale = Costo (Numero Bugs)? X (Costo del singolo Bug) #Bugs

How Hard To Fix?

How Hard To Fix? Costo Costo Totale = (Numero Bugs)? X (Costo del singolo Bug)? #Bugs

Bug Repellent

Automatic Test Costo Lines Of Code

Defect Prevention = Prevedibilità

Defect != Bug

Planning

Feedback

Sensing Code (Unit Tests)

Sensing Architecture (Functional Tests)

Sensing Product (Acceptance Tests)

Do Learn Sense

Feedback = Governabilità

Automatic Tests => Sostenibilità Prevedibilità Governabilità

Test Automation Lifecycle

Fixture All the things we need to have in place in order to run a test and expect a particular outcome

1: Fixture SetUp Fixture Fixture SetUp

SUT The “System Under Test”, whatever thing we are testing

2: Exercise SUT Fixture Fixture SetUp Exercise SUT SUT

3: Verify Result Fixture Fixture SetUp Exercise SUT SUT Verify Result

4: Fixture TearDown Fixture Fixture SetUp Exercise SUT SUT Verify Result Fixture TearDown

Test Automation Identity

Who? What? Why?

Who? Chi lo scrive? A chi da valore? Chi lo legge?

What? Quali sono le Qual'è il SUT? condizioni?

Why? Qual'è lo scopo? Cosa voglio verificare? Quali informazioni voglio avere?

Unit Tests

Who? Developers

What? Unit Of Code

Why? Verify Code Behaviour, Code Documentation

Unit Test Test Function • Method • Unit Procedure • ... •

Unit Test Database • File System Test • Configuration • X OS • Unit

Unit Test Test X Network X Unit

Unit Test Test X X X Unit Unit

Tools Simple Test (http://www.lastcraft.com/simple_test.php) PHPUnit (http://www.phpunit.de)

1: Fixture SetUp

2: Exercise SUT

3: Verify Result

4: Fixture TearDown

If total() < 100 then no discount If daysUntilLastSelling() > 30 then no discount If daysUntilLastSelling() < 30 and total() > 100 then discount

New Requirement

Embrace Change?

Test Behaviour Not Code

Why? Test Driven Development = Code Design

Code Coverage

Integration Tests

Who? Developers

What? Units Of Code

Why? Verify Code Behaviour, Code Documentation, Code Design

Database Tests

Who? Developers, DBA

What? Stored Procedure, Complex Query, Data Migration

Why? Wrong data is source of bugs!

Functional Tests

Who? Developers, Customer

What? Application

Why? Verify Application Behaviour, Application Design

What? HTTP

Tools Selenium (http://www.openqa.org/selenium)

What? HTTP

What? Presentation Vs Business Logic

Acceptance Tests

Who? Customer

What? Application

Why? Product Design, Product Specification

Tools Fit/Fitness/PHPFit (http://fit.c2.com/) (http://fitnesse.org/) (http://phpfit.berlios.de/)

Continuous Integration

Where? When? Run Automatic Tests

When?/Where? Unit Tests, Integration Tests, Database Tests, Acceptance Tests

When?/Where? (All Previous) + Smoke Tests

When?/Where? (All Previous) + Load/Performance/Security Tests + Migration/Installation/Configuration Tests

Test Automation Genesis

Risk Analysis

Brian Marick Cathegories Business Facing Support Programming Support Product Technology Facing

Brian Marick Cathegories Business Facing Support Programming Support Product Unit Tests Technology Facing

Brian Marick Cathegories Business Facing Support Programming Support Product Acceptance Tests Unit Tests Technology Facing

Brian Marick Cathegories Business Facing Support Programming Support Product Acceptance Tests Load/ Unit Security Tests Tests Technology Facing

Automatic Business Facing Support Programming Usability/ Support Product Acceptance Exploratory Tests Tests Load/ Unit Security/ Tests Tests Technology Facing

All Tests should be Automatic?

Manual Business Facing Support Programming Usability/ Support Product Acceptance Exploratory Tests Tests Load/ Unit Security/ Tests Tests Technology Facing

Manual Tests Drive Automatic Tests

Test Automation

Pay Attention to Test Automation

“An imperfect test today is better than a perfect test someday”

Test Automation = Process Improvement

Debug Sucks Test Rocks

Testing Web Applications Gabriele Lana www.gabrielelana.it info@gabrielelana.it

Gabriele Lana: Testing Web Applications

by Francesco Fullone on May 18, 2007

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