TestNG interceptTestClassConstructor analog

[Mitia Alexandrov]

Hello,

I need somehow to intercept Test class constructor to override a behavior. In JUnit it is done with:

@Override 

public <T> T interceptTestClassConstructor(Invocation<T> invocation, ReflectiveInvocationContext<Constructor<T>> invocationContext, ExtensionContext extensionContext) throws Throwable { ... }

How is this achievable in TestNG?

Thank you!

Best regards,

Dmitry

[⇜Krishnan Mahadevan⇝]

Dmitry,

You could leverage an ObjectFactory wherein you can control how the objects are being created.

1. Implement org.testng.IObjectFactory

2. Provide a reference to this object factory in your suite xml file via the attribute "object-factory".

This would let you gain access to the constructor and also the parameters that are being passed to it.

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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[Mitia Alexandrov]

Thank you very much!

I'm now creating a Suite listener, so is there a way to include this object Factory as a "default" for all tests?

Best regards,

Dmitry

пт, 19 нояб. 2021 г. в 07:26, ⇜Krishnan Mahadevan⇝ <krishnan.ma...@gmail.com>:

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[⇜Krishnan Mahadevan⇝]

Yes you can do that via iSuite.getXmlSuite().setObjectFactory()

Here iSuite is of type ISuite which you get access to in your onStart of your ISuiteListener

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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[Mitia Alexandrov]

Thank you!..But.. did not work for me...

newIstance never called...

@Override
public Object newInstance(Constructor constructor, Object... params) {
    System.out.println(">>> "+constructor.getDeclaringClass());
    if (container == null) {
        ...
    }
    return ...;
}

@Override
public void onStart(ISuite suite) {
    System.out.println("Starting Suite");
    suite.getXmlSuite().setObjectFactory(this);
}

пт, 19 нояб. 2021 г. в 12:15, ⇜Krishnan Mahadevan⇝ <krishnan.ma...@gmail.com>:

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[⇜Krishnan Mahadevan⇝]

Ok. Can you please try the same thing with an implementation of IAlterSuiteListener which you can wire in as a mandatory listener via the Service Provider Interface support ?

https://testng.org/doc/documentation-main.html#listeners-service-loader

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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[Mitia Alexandrov]

Looks like we are almost there!!

but.. this did not help:

@Override
public void alter(List<XmlSuite> suites) {
    suites.forEach(e-> e.setObjectFactory(this));
}

This method is called, but still no "newInstance is called"

пт, 19 нояб. 2021 г. в 12:29, ⇜Krishnan Mahadevan⇝ <krishnan.ma...@gmail.com>:

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[⇜Krishnan Mahadevan⇝]

Looks like we have a problem.

What you are noticing is because of a broken functionality.

This was kind of fixed/patched in the upcoming TestNG version (7.5.0 which is yet to be released).

But even there, the same test fails with a NullPointerException. I have logged a bug for this https://github.com/cbeust/testng/issues/2676 and will work on fixing it.

Until 7.5.0 is released, you would be able to get this working only via the object-factory attribute in the suite file.

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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[Mitia Alexandrov]

Oh, cool!! This is very kind of you!

Thank you very much!

пт, 19 нояб. 2021 г. в 13:22, ⇜Krishnan Mahadevan⇝ <krishnan.ma...@gmail.com>:

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[Krishnan Mahadevan]

I have raised a PR to fix the bug in question and its being reviewed. So this fix would definitely be included in 7.5.0 (whenever it gets released).

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[Mitia Alexandrov]

Great!! Thank you!

пн, 22 нояб. 2021 г. в 06:59, Krishnan Mahadevan <krishnan.ma...@gmail.com>:

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[Mitia Alexandrov]

Hello,

Happy New Year!

When is the 7.5.0 release planned? We are really depending on the bug resolved in this thread....

Best regards,

Dmitry

пн, 22 нояб. 2021 г. в 08:10, Mitia Alexandrov <mitiaal...@gmail.com>:

[Krishnan Mahadevan]

Dmitry,

 

TestNG 7.5 has been released. I just now shared the release notes on this group

To view this discussion on the web visit https://groups.google.com/d/msgid/testng-users/CACX6pRHZNF2p-fVyy1a499udTm5CdvyurG0M-fvT8K2psNoTKA%40mail.gmail.com.

[Mitia Alexandrov]

Great!!! When is it expected to be available in maven central?

пт, 7 янв. 2022 г. в 06:08, Krishnan Mahadevan <krishnan.ma...@gmail.com>:

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[⇜Krishnan Mahadevan⇝]

It is already available in Maven Central

https://mvnrepository.com/artifact/org.testng/testng/7.5

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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[Mitia Alexandrov]

YAY!! Awesome!!! Thank you!

пн, 10 янв. 2022 г. в 10:41, ⇜Krishnan Mahadevan⇝ <krishnan.ma...@gmail.com>:

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