Testng: IAnnotationTransformer doesn't run when specified as an @Listeners

Created on 17 Sep 2013 · 7Comments · Source: cbeust/testng

IAnnotationTransformer only works when specified in the suite xml file with . I would like it to also run the transformer when specified in the @Listener annotation

Example:

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import org.testng.IAnnotationTransformer;
import org.testng.annotations.ITestAnnotation;

public class TransformerImpl implements IAnnotationTransformer {

    @Override
    public void transform(ITestAnnotation annotation, Class testClass, Constructor testConstructor, Method testMethod) {
        System.out.println("Transform Annotation");
    }
}

import org.testng.annotations.Listeners;
import org.testng.annotations.Test;

@Listeners({ TransformerImpl.class })
public class AnnotationTest {

    @Test
    public void run() {
        System.out.println("run");
    }
}

Source

rkonkul

Most helpful comment

From the documentation: (http://testng.org/doc/documentation-main.html)

The @Listeners annotation can contain any class that extends org.testng.ITestNGListener except IAnnotationTransformer and IAnnotationTransformer2. The reason is that these listeners need to be known very early in the process so that TestNG can use them to rewrite your annotations, therefore you need to specify these listeners in your testng.xml file.

rkonkul on 9 Apr 2015

👍7

All 7 comments

Why this issue was closed? The problem is alive (v. 6.8.21).

Aleks-Ya on 9 Apr 2015

From the documentation: (http://testng.org/doc/documentation-main.html)

The @Listeners annotation can contain any class that extends org.testng.ITestNGListener except IAnnotationTransformer and IAnnotationTransformer2. The reason is that these listeners need to be known very early in the process so that TestNG can use them to rewrite your annotations, therefore you need to specify these listeners in your testng.xml file.

rkonkul on 9 Apr 2015

👍7

Looks like the issue is still alive

vinaybalepur on 11 Jun 2018

It wasn't an issue to begin with. The Javadocs I believe explicitly calls
out that IAnnotationTransformer cannot be injected via a @Listeners
annotation.
TestNG is working as designed in this case.