Events in junit with Mockito - events

Question

I try to test javax.enterprise.event.Event mocked by mockito but the following exception is thrown
Absent Code attribute in method that is not native or abstract in class file javax/enterprise/util/TypeLiteral
The class looks like
public class MyClassTest {
#Mock Event<MyAlarm> event;
//...
#Before
public void setUp() {
MockitoAnnotations.initMocks(this);
//...
}
#Test
public void myTest() {
MyClass myClass = new MyClass();
myClass.event = event;
//...
verify(event, never()).fire(any(MyAlarm.class));
//...
}
}
I add following to the pom.xml (maven project)
<repository>
<id>glassfish</id>
<name>GlassFish Maven Repository</name>
<url>http://maven.glassfish.org/content/groups/glassfish</url>
</repository>
and include the glassfish-embedded-all in front of the javax (javaee-web-api) dependency
<dependency>
<groupId>org.glassfish.extras</groupId>
<artifactId>glassfish-embedded-all</artifactId>
<version>3.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>6.0</version>
<type>jar</type>
<scope>provided</scope>
</dependency>
What I have done wrong or what do I misunderstand?

Answer 1

I made some slight mistakes. This article Unit Testing for Java EE
by Adam Bien pointed me in the right direction.
I removed the javaee-web-api dependency and add the glassfish-embedded-all dependency. My pom.xml looks like:
<!-- .... -->
<dependency>
<groupId>org.glassfish.extras</groupId>
<artifactId>glassfish-embedded-all</artifactId>
<version>3.1.1</version>
<scope>provided</scope>
</dependency>
<!-- <dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>6.0</version>
<scope>provided</scope>
</dependency>-->
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>1.8.5</version>
<scope>test</scope>
<type>jar</type>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<!-- .... -->
<repositories>
<repository>
<url>http://download.java.net/maven/2/</url>
<id>java.net</id>
<layout>default</layout>
<name>java.net</name>
</repository>
</repositories>
This works well for me and I can test java ee events (or mock-it out).

Answer 2

As a workaround what I did was to add an inner class marked #Singleton in my test class that acts as an event observer. Such a class would look like this:
#Singleton
public static class MyEventObserver {
MyEvent event;
public void onMyEvent(#Observes MyEvent event) {
this.event = event;
}
}
}
And then in my test class I inject this class:
#Inject MyEventObserver observer;
and finally in the test method I would do something like:
Assert.assertNotNull(observer.event);
This worked for me.

Answer 3

The methods in TypeLiteral are final (see docs) which means that Mockito can not mock them (see the Mockito FAQ).
Perhaps consider using PowerMock (it can work in conjunction with Mockito I think) which apparently can mock final methods