Java EE Behave!!!!

Java EE Behave!!!! Behaviour-Driven Development with Java EE Aaron Walker a.walker@base2services.com @aaronwalker http://aaronwalker.me http://www.base2services.com #jeebehavebase2Services Pty Ltd Commercial in Conﬁdence 2010

Agenda • What is this BDD thingy • JBehave • How to make your tests behave! • { Demo } • Java EE ﬂavouring • { Demo } • Q &A #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

BDD ~ Behaviour Driven Development ~ “BDD facilitates agile development, which is an approach to develop functional software, within reasonable timeline, making everyone happy, without killing anyone, or burning down any bank.” #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

BDDs Core Principles • Its all behaviour “The business & technology people should be speaking the same words when referring to the same idea,there should not be any translator.” Behaviour: the addition of N values should yield the summation of them Example: the addition of 2 + 4 + 2 should yield 8 #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

BDDs Core Principles • The evolution of test-driven development (TDD) and acceptance-test driven design • Shifts the vocabulary from being test-based to behaviour-based • Essentially a design philosophy #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

Unit testing frameworks mismatch It’s all about the Behaviour #jeebehavebase2Services Pty Ltd Commercial in Conﬁdence 2010

Oh JBehave • a framework for Behaviour-Driven Development. • pure Java implementation • Users can specify and run plain text- based user stories • Annotation-based configuration and Steps class specifications • Dependency Injection support (more on this one later) • Tool/IDE integration • Ant, Maven, Selenium, Eclipse, IntelliJ, Netbeans #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Confidence 2010

Yep....plain text #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

Narrative • Describes the overall intent of the story • Generally describes a single feature or use case • Should include any participating actors “In order to learn about BDD and JBehave as a JavaOne attendee I will attend session 24421- JEE Behave!” #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

Scenario • Describes a specific interaction • Generally fine-grained • test valid and invalid outcomes • Support for parametrisation “Scenario: User signs up with invalid data” #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Confidence 2010

Given|When|Then|And • Given ... setting up system to a known state • When ... exercising an event • Then ... verifying an outcome • And ... used to chain multiple Given, When and Then statements #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

So where’s the Java? • Mapping Textual Scenario Steps to Java Methods via annotations • Steps instances may inherit or implement other class/ interface as required by the model of the application under test. • allows many different ways to configure Embeddable Java classes • ConfigurableEmbedder: allows the specification of the Configuration and CandidateSteps. • InjectableEmbedder: allows the injection of a fully specified Embedder. #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Confidence 2010

JUnit • JUnit is supported out-of-the-box via several Embeddables implementations: • JUnitStory: provides a one-to-one mapping with the textual story via the StoryPathResolver. • JUnitStories: provides a many-to-one mapping with the textual story paths explicitly speciﬁed by overriding the storyPaths() method. #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

One Step at a time #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

And the config • Fluent API for specifying configuration #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Confidence 2010

{ Demo } Enough Slide-ware Show me the Code!!! #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

Now lets sprinkle a little bit of JEE on top #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

CDI/Weld • Contexts and Dependency Injection for Java • (JSR-299 included in JEE6) • Weld is the reference implementation • http://seamframework.org/Weld #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

JBehave CDI support • jbehave-weld module • Uses Weld Java-SE integration to bootstrap the CDI container • can inject configuration and steps using CDI annotations • greatly simplifies the configuration and management of step classes #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Confidence 2010

Inject the Configuration • Use a CDI @Produces along with a @WeldConfiguration qualifier annotation • Gets automatically injected into the running scenario #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Confidence 2010

What about the Steps • Simply mark Step classes with a @WeldStep annotation • They get automatically added as candidate steps • Steps can use @Inject to inject dependencies #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

{ Demo } Show me a better way!!! #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

JBehave Web • JBehave Web is an extension of the JBehave framework providing a web integration layer • Features include: • Web Queue to allow generic stories to be run asynchronously via a simple web interface. • Web Runner to allow generic stories to be run synchronously via a simple web interface. • Selenium integration module to allow automation of stories for web applications using Selenium. #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

{ Demo } Now let’s put all this together #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

System Integration Testing • JBehave is a good language for describing system integration • BA’s, QA’s, architects, and developers are all speaking the same language • Self documented acceptance tests #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

What’s Next • Custom CDI Scopes • @StoryScope, @ScenarioScope • Arquillian Integration • ??????? #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

Q &A • http://behaviour-driven.org/ • http://jbehave.org - JBehave project site • github.com/aaronwalker/JavaOne2011 - demo code • http://aaronwalker.me - blog • a.walker@base2services.com - email • @aaronwalker - twitter #jeebehave base2Services Pty Ltd 2011base2Services Pty Ltd Commercial in Conﬁdence 2010

http://aaronwalker.me	406
http://lanyrd.com	40
http://localhost:4000	6

Java EE Behave!!!!

by Aaron Walker on Oct 05, 2011

Accessibility

Categories

Upload Details

Usage Rights

3 Embeds 452

Statistics

Java EE Behave!!!! Presentation Transcript