IAnnotationTransformer: Class level @Test annotoation causes "transform()" method invocation multiple times.

TestNG version - 7.5 Java version - 17.0.2 Build tool - Maven, surefire plugin version 3.0.0-M5 IDE -InteliJ

When @Test annotation is set at class level and IAnnotationTransformer interface is implemented, transform() method gets invocated multiple times. I saw the same issue had been reported before and got fixed, but it appears again.

Here is my testng.xml file content attached.

The Test Class

@Test
public class SomeTestClass {

    public void someTest() {
        System.out.println("someTest");
    }
}

IAnnotationTransformer implementation class

public class AnnotationTransformer implements IAnnotationTransformer {

    @Override
    public void transform(ITestAnnotation annotation, Class testClass,
                          Constructor testConstructor, Method testMethod) {

        System.out.println(testClass);
    }
}

And here is the output:

[krmahadevan]

@David91

For method level @Test annotation transform() method works as expected. It gets invoked once

Ok in that case, a class that has only 1 @Test method should also reflect the same behaviour. If that’s not what is being seen then this for sure would be a defect.

I don’t say only once in any case, but in this case, there is only one @Test annotation on top of the class, so it should be invoked once for that class. Fair expectation. I believe that there’s a defect lurking there somewhere which needs to be taken care of.

Also here is the description of the transform() method from TestNG official doc and it clearly describes when the method should be invoked.

Yes, that’s correct. But it doesn’t call out how many times would the transform be invoked, which is what I was alluding towards 😃

[David91]

Hi @krmahadevan

1. For method level @Test annotation transform() method works as expected. It gets invoked once
2. I don’t say only once in any case, but in this case, there is only one @Test annotation on top of the class, so it should be invoked once for that class. Also here is the description of the transform() method from TestNG official doc and it clearly describes when the method should be invoked.