functional testing swing user interfaces with …functional testing swing user interfaces with...

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Functional Testing Swing

User Interfaces with

Frankenstein

Vivek Prahlad

Senior Developer, ThoughtWorks

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Agenda

• Why a new tool?

• Introduction to Frankenstein

• Demo

• Q & A

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Why?

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Swing Client, pre-existing

FIT scripts

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Needed to write fixtures for new screens

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Did not test actual UI

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Tested UI model layer

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UI Model

FIT Fixtures Screens

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No Swing driver

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Duplication

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Enter UserName foo

Enter Password bar

Initiate Login

Navigate Create>Blog Entry

...

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Enter UserName foo

Enter Password bar

Initiate Login

Navigate Edit>Blog Entry

...

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Not easy to create fixtures

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Writing fixtures slowed down

development

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Additional features

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Record & Play

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Multithreaded apps?

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Swing is single threaded

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but

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Serious Swing apps use

worker threads

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What's the problem?

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Tests with arbitrary waits

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click_button(“connect”)

wait(20) //Pray!

do_something_else

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Fragile,slow tests

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Explicit Synchronization

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wait_for_text(“done”)

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Verbose tests

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upload_file(“file”)

wait_for_text(“done”)

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Obscures intent

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Custom components?

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Evaluated Abbot, Marathon

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Didn't quite have what we'd

wanted

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'Let's write it!'

-Chris Stevenson

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Introducing Frankenstein

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FIT like scripts

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Navigate Create>Blog

EnterText post *my blog text*

SelectDropDown time now

ClickButton Post

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Plain text

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Easy to write, Human Readable

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Human Readable

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Human Readable

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Understood (and shared) by the whole team

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Record & Playback

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..useful for reproducing bugs

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No arbitrary waits

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Works with JDK 1.4+

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Code changes?

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Name components with component.setName()

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Works with applications where codebase cannot be

modified

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...with a few limitations

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Not easy record custom components

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i18n

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Test multithreaded apps viaWorkerThreadMonitor

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public interface WorkerThreadMonitor {

public void start();

public void waitForIdle();//blocking

}

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How is the WorkerThreadMonitor used?

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Wait for all Swing events to be completed

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Wait for all worker threads to complete

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Easy to extend test vocabulary

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Add assertions

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Easy integration

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java com.yourapp.MainClass args...

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java com.thoughtworks.frankenstein.application.PipingMain com.yourapp.MainClass args...

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..or write your own main class

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Custom recorders for custom components

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Ruby driver

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Variables, functions

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Keep tests DRY

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Other language drivers easy to add

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~ 1500 LOC

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98% test coverage

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Demo

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How does it work?

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Recorders hook onto Swing Event Queue

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Add component-specific listeners

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Create Events when listeners are triggered

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Events know how to replay themselves

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IOC + PicoContainer

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What's missing?

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More assertions

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Support for relatively less used components

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Open Sourcing soon

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Thank You

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Blog at http://www.vivekprahlad.com

Email:

vprahlad@thoughtworks.com