I am trying to use Weld SE 2.3.0.Final to swap an alternative implementation of an injected dependency during testing by supplying a different beans.xml in src/test/resources/META-INF
It always seems to use the main version of beans.xml though and I'm not sure why.
First of all here are the supporting classes
Engine.java
{{ ```java
public interface Engine
{
void start();
void stop();
} }}
```
DefaultEngine.java
{{@Vetoed
public class DefaultEngine implements Engine
{
public void start()
{
System.out.println("Cough cough vrummmmm");
}
public void stop()
{
System.out.println("Phhhut clank");
}
}}}
Car.java
{{public class Car
{
@Inject
private Engine engine;
public void startCar()
{
engine.start();
}
public void stopCar()
{
engine.stop();
}
}}}
EngineProducer.java
{{public class EngineProducer
{
@Produces
public Engine getEngine()
{
return new DefaultEngine();
}
}}}
App.java
{{public class App
{
@Inject
private Car car;
public void main(@Observes ContainerInitialized event)
{
car.startCar();
car.stopCar();
}
}}}
And the production version of beans.xml in src/main/resources/META-INF
{{<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
version="1.1" bean-discovery-mode="all">
</beans>}}
The above code when run from App.java should print (and it does)
{{Cough cough vrummmmm
Phhhut clank}}
Now from the test code I want to use the SportsEngine implementation. So I have the following
SportsEngine.java
{{@Vetoed
public class SportsEngine implements Engine
{
public void start()
{
System.out.println("Vrummm vrummm vrummmm!");
}
public void stop()
{
System.out.println("Prrrrrr clunk");
}
}}}
TestEngineProducer.java
{{@Alternative
public class TestEngineProducer
{
@Produces
public Engine getEngine()
{
return new SportsEngine();
}
}}}
AppTest.java
{{@RunWith(WeldJUnit4Runner.class)
public class AppTest
{
@Inject
private Car car;
@Test
public void testCar()
{
car.startCar();
car.stopCar();
}
}}}
WeldJUnit4Runner.java
{{public class WeldJUnit4Runner extends BlockJUnit4ClassRunner
{
/** The test class to run. */
private final Class<?> mKlass;
/** Weld infrastructure. */
private final Weld weld;
/** The container itself. */
private final WeldContainer container;
/**
* Runs the class passed as a parameter within the container.
*
* @param klass
* to run
* @throws InitializationError
* if anything goes wrong.
*/
public WeldJUnit4Runner(final Class<Object> klass) throws InitializationError
{
super(klass);
this.mKlass = klass;
this.weld = new Weld();
this.container = weld.initialize();
}
@Override
protected Object createTest() throws Exception
{
final Object test = container.instance().select(mKlass).get();
return test;
}
}}}
And the test version of beans.xml in src/test/resources/META-INF
{{<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
version="1.1" bean-discovery-mode="all">
<alternatives>
<class>com.test.testing.TestEngineProducer</class>
</alternatives>
</beans>}}
When the test method is run it should print
{{Vrummm vrummm vrummmm!
Prrrrrr clunk}}
But instead it seems to use the EngineProducer instead of the TestEngineProducer and prints the output twice
{{Cough cough vrummmmm
Phhhut clank
Cough cough vrummmmm
Phhhut clank}}
Why is it not using the test beans.xml?
If I put the <alternatives> section from test beans.xml and put it in the main beans.xml then it works, but I don't want to swap the beans.xml in main/resources/META-INF when I'm testing
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