CODEWITHSUNDEEP
unit-testingjakarta-eejboss7.xjboss-arquillian
Yngwie89
Yngwie89

Reputation: 1217

Unit Testing a @PostConstruct method in a @Startup @Singleton bean

I start by saying that I'm at the very beginning with my adventure with java-ee and arquillian (unit testing in general).

I'm using wildfly 8.0.0CR1.

I've a class (I'm going to call this "Initialization Bean") that is a simple @Singleton @Startup bean with a @PostConstruct method that does some basic db's initialization .

It's counterpart is a unit test that inside the @Before method, truncates all db's tables to prepare the database for the initialization phase.

The problem is that the Initialization Bean @PostContruct method gets called before my unit test is set up so that the method that should truncate all database table is actually called after the Initialization Bean @PostContruct method.

How can I debug a @PostContruct method in a @Singleton @Startup bean correctly?

I hope I've been enough clear, otherwise tomorrow I'll post some real code. Thanks in advance

Upvotes: 0

Views: 2259

Answers (2)

S.E.T.
S.E.T.

Reputation: 137

You could use reflection to instantiate any @StartUp classes and invoke the @PostConstruct methods before each test class. Apparently this is easily done with Spring but we are not using Spring in this environment. Here is an example of how I did it:

public class BaseTest {
    @BeforeClass
    public static void instantiateStartupClasses() throws InvocationTargetException, IllegalAccessException, InstantiationException {
        Reflections reflections = new Reflections("com.company.project");
        //Find all classes annotated with Startup in a given package.
        Set<Class<?>> classes = reflections.getTypesAnnotatedWith(Startup.class);
        for(Class clazz : classes) {
            if(clazz.isInterface()) continue;
            //Instantiate the object
            Object instantiatedClass = clazz.newInstance();
            //Find any PostConstruct methods on the class and invoke them using the instantiated object.
            for(Method method : clazz.getDeclaredMethods()) {
                if(method.isAnnotationPresent(PostConstruct.class)) {
                    //Invoke the post constructor method.
                    method.invoke(instantiatedClass);
                }
            }
        }
    }
}

Upvotes: 0

DuCh
DuCh

Reputation: 21

Did you annotate your init bean with @javax.ejb.Singleton?

I was experiencing the same problem, then I noticed that I annotated the init bean with @javax.inject.Singleton. After fixing the annotation the @PostConstruct method is called.

Upvotes: 2

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