EclipseCon Europe 2013

TESTING�OSGI�THE�GROOVY�W?Y

Lars Pfannenschmidt & Dennis Nobel

Lars PfannenschmidtSenior Software Engineer at Level Up Analytics IntuitFounder of

ÔÔ @mobilecgn

Dennis NobelIT Consultant at itemis AG Java, Web and OSGi Developer

Ô @itemisÔ

IM?GINEwriting tests would make fun...

QUESTION�1:Do you test your OSGi

components?

QUESTION�2:Are you using Groovy?

Our Testing StoryEmbedded Device with CVM (~Java 1.4)OSGi framework (Prosyst mBS)Development with EclipseCI Build with Maven and Tycho

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How to write our tests?

Test RequirementsEasy to writeModern languageType-safe access to Java classesEasy mockingExecutable in Eclipse and Maven CI buildGood IDE supportNo side effects for production code

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J?V?�Modern language?

Not really...

What? Why Groovy?

Because we can!

GROOVYJVM LanguageSyntax SugarClosuresLess "Chatty"

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Groovy JUnit TestType inference, readable asserts, syntax sugar and more:

     

@Testvoid 'Build pizza with BBQ sauce only'() { def pizza = PizzaBuilder.newPizza() .withSauce(BBQ) .build()

assertThat pizza.sauce, is(BBQ) }

    

How to test our OSGi Services?

Pizza Service SampleServices: PizzaService → PaymentService

            

public class PizzaServiceImpl implements PizzaService {

@Override public void placeOrder(final Order order) { ... creditCardPaymentService.handleTransaction(...); ... } }

        

UNIT�TESTS+ Executed fast+ Focussed on the component­ No OSGi Runtime features­ Dependencies must be mocked­ No testing of declarative OSGi parts

SYSTEM�TESTS+ Cover complete system+ Real target environment+ No mocking or special configuration­ Embedded device is needed (high execution effort)­ Slow execution­ Not focussed

IN�CONT?INER�TESTSExecuted in OSGi environmentFocussed on the componentTesting of declarative OSGi partsOnly partial mocking

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...we can not run Groovy in CVM

Why not use

EQUINOXwith a modern JVM?

GROOVYIn-Container Testing with

equinox

MockingSimply transform a map to a proxy:

            

def paymentService = [ handleTransaction: { String companyId, long creditCardNumber -> assertThat companyId, is(equalTo('LUIGIS_PIZZA_SERVICE')) transactionCalled = true }] as CreditCardPaymentService

        

Register OSGi service mocks (1)            

class PizzaServiceTest extends OSGiTest {

@Override protected BundleContext getBundleContext() { Activator.context } ...}

        

Register OSGi service mocks (2)            

@Testvoid 'Assert that the handleTransaction method is called'() { ... registerMock(paymentService)

PizzaService pizzaService = getService(PizzaService)

def pizza = PizzaBuilder.newPizza().withSauce(Sauce.BBQ).build() def customerInfo = new CustomerInfo("Max Mustermann", new Address(), 4242) pizzaService.placeOrder(new Order(pizza, customerInfo))

assertThat transactionCalled, is(true)}

        

OSGiTest.groovy            

def registeredServices = [:]protected abstract BundleContext getBundleContext()

def <T> T getService(Class<T> clazz){ def serviceReference = bundleContext.getServiceReference(clazz.name) assertThat serviceReference, is(notNullValue()) bundleContext.getService(serviceReference)}

def registerMock(def mock, Hashtable properties = [:]) { def interfaceName = mock.class.interfaces?.find({it})?.name assertThat interfaceName, is(notNullValue()) registeredServices.put(interfaceName, bundleContext.registerService(interfaceName, mock, properties))} ...

        

?UTOM?TIONwith Maven and Tycho

Tycho Groovy configuration (1)Groovy & Maven

http://groovy.codehaus.org/Groovy-Eclipse+compiler+plugin+for+Maven

Groovy Repository        

<repositories> ... <repository> <id>groovy-eclipse</id> <layout>p2</layout> <url>http://dist.springsource.org/release/GRECLIPSE/e4.3/</url> </repository></repositories>

        

Tycho Groovy configuration (2)Tycho, Groovy & Surefire

            

...<plugin> <groupid>org.eclipse.tycho</groupid> <artifactid>tycho-surefire-plugin</artifactid> <version>${tycho.version}</version> <configuration> <includes> <include>**/*</include> </includes> ... </configuration></plugin>...

        

CONCLUSIONAdd integrative Tests to your OSGi projectsEasy to add groovy support in equinox and tychoGroovy makes developing tests more easierPowerful tests which run as fast as unit tests (>300 Tests in ~3minutes)Fun!

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TH?NK�YOU�Checkout "groovy" OSGi testing at github:

        

$ git clone https://github.com/groovyosgi/testing.git$ cd testing$ mvn clean install

    

Lars Pfannenschmidt (Intuit, Inc.)

Dennis Nobel (itemis AG)