Question 1:

Do you test your OSGi components?

Question 2:

Are you using Groovy?

How to write our tests?

Test Requirements

• Easy to write
• Modern language
• Type-safe access to Java classes
• Easy mocking
• Executable in Eclipse and Maven CI build
• Good IDE support
• No side effects for production code

Java?

Modern language?

Not really...

What? Why Groovy?

Because we can!

Groovy

• JVM Language
• Syntax Sugar
• Closures
• Less "Chatty"

How to test our OSGi Services?

Pizza Service Sample

Services: PizzaService → PaymentService

            
public class PizzaServiceImpl implements PizzaService {

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

Unit Tests

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-Container Tests

• Executed in OSGi environment
• Focussed on the component
• Testing of declarative OSGi parts
• Only partial mocking

...we can not run Groovy in CVM

Why not use

equinox

with a modern JVM?

Groovy

In-Container Testing with equinox

Mocking

Simply 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)

            
@Test
void '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))
}
    ...
            
        

Automation

with Maven and Tycho

Tycho Groovy configuration (1)

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

Groovy Repository

        

    ...
    
        groovy-eclipse
        p2
        http://dist.springsource.org/release/GRECLIPSE/e4.3/
    

            
        

Tycho Groovy configuration (2)

Tycho, Groovy & Surefire

            
...

    org.eclipse.tycho
    tycho-surefire-plugin
    ${tycho.version}
    
        
            **/*
        
        ...
    

...