Best way to add custom BEFORE/AFTER annotation

[Baubak]

Hi there,

My current project is an open source plugin for TestNG (will be sharing it when I am happy with it), which introduces a category of tests with specific behaviors in a normal test project.

I would like to create my own @BeforeMyEvent method that is invoked before my category of tests are run.

There are a lot of workarounds I know. My question is if there is a clean way of doing that?

Obviously I can integrate it in a Test listener and invoke the @before method by parsing the code. Or set my tests in a dedicated group, and invoke beforeGroup. But ideally I would like to have my own annotation. Is theree a way to get my method to be invoked by the testng framework (picked by JDK15AnnotationFinder)?

Best regards,

Baubak

[⇜Krishnan Mahadevan⇝]

Have you considered adding your custom annotation which gets parsed in a TestNG IInvokedMethodListener and depending on the annotation being found, invokes your custom behavior ? This is a standard way in which you can build custom annotation driven behavior.

Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else!"
My Scribblings @ http://wakened-cognition.blogspot.com/

My Technical Scribblings @ https://rationaleemotions.com/

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[Baubak]

Thanks for your answer Krishnan,

What are the added values in using InvokedMethodListener rather than invoking it in another listener such as ITestListener?

Best regards,

Baubak

[⇜Krishnan Mahadevan⇝]

IInvokedMethodListener would help you intercept both configuration and test methods, whereas the same is not going to be possible when you use ITestListener.

Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else!"
My Scribblings @ http://wakened-cognition.blogspot.com/

My Technical Scribblings @ https://rationaleemotions.com/

To view this discussion on the web visit https://groups.google.com/d/msgid/testng-users/5fa21e11-c2e8-4f48-a3c5-c55839fb09d0n%40googlegroups.com.

[Baubak]

Hi Again Krishnan,

By "adding your custom annotation which gets parsed in a TestNG IInvokedMethodListener", do you mean that I search for it in in the IInvokedMethodListener implementation, or that there is a smart way of having my annotated method to be considered as a configuration method? If there is I'd love an example of how it could work.

Best regards,

Baubak

On Tuesday, September 28, 2021 at 6:42:08 AM UTC+2 Krishnan Mahadevan wrote:

[Krishnan Mahadevan]

Please see here for an example of what I am suggesting.

https://github.com/RationaleEmotions/autospawn/blob/master/src/main/java/com/rationaleemotions/testng/BrowserSpawningTestNGListener.java

In the above class I look for a custom annotation before deciding to do some browser management.

Thanks & Regards

Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else!"

http://rationaleemotions.com/

Sent from BlueMail

[Baubak]

Thanks a lot,

So if I understand you correctly the listener you have written assumes that the annotation should be on the test.

so it expects something like

@Test

@Browser

public void test() {

}

So what I can do is something like;

@Test

@MyCustomAnnoation() {

//Do stuff

}

And then when I reach it I can do the stuff inside?

Best regards,

Baubak

[⇜Krishnan Mahadevan⇝]

Yes. That is correct. You just need to switch the annotation and then the annotation parsing logic in the listener.

Thanks & Regards
Krishnan Mahadevan

"All the desirable things in life are either illegal, expensive, fattening or in love with someone else!"
My Scribblings @ http://wakened-cognition.blogspot.com/

My Technical Scribblings @ https://rationaleemotions.com/

To view this discussion on the web visit https://groups.google.com/d/msgid/testng-users/6a8d5a78-0d46-4097-94c6-ded3bca535dan%40googlegroups.com.

[Baubak]

Hi,

After trying the IInvokedMethodListener, I decided that using another implementation of the IAnnotationTransformer would be more suitable for my use case:

public void transform(IConfigurationAnnotation annotation, Class testClass, Constructor testConstructor,
            Method testMethod)

It allowed me to intercept the configuration methods. In my case I wanted to make sure that in some cases my configuration method should be ignored. It seemed easier to implement that here. I am not sure the IInvokedMethodListener would allow me to disable a method execution.

Again, thanks for your suggetions :)

Baubak