JUnit Rule annotation is not supported

[rlogiacco]

The JUnit Rule annotation support would be very useful to allow to take snapshots on failing tests, but the Cucumber JUnit runner does not support such annotation.
I think that it should be easy to add this support by modifying the runners and introducing the JUnit Statement class usage: I've forked the project and started working on it: please let me know if this is an unwanted feature.

[aslakhellesoy]

You can take screenshots in an After hook, checking scenarioResult.isFailed() if you only want it to happen for failed scenarios. What else do you need Rule support for? I'm sceptical of making Junit a dependency in core.

See https://github.com/cucumber/cucumber-jvm/blob/master/examples/java-webbit-websockets-selenium/src/test/java/cucumber/examples/java/websockets/SharedDriver.java#L53

[rlogiacco]

I'm not suggesting of making JUnit a dependency in core, but in cucumber-junit which already depends on JUnit. The point is that rules are very flexible and represent a JUnit standard extension mechanism and supporting rules can redirect all those weird requests you receive into just "can't you write a rule for it?"

BTW, I tried that solution, but I wasn't able to have it working as I get an exception (I'm using Spring and the JavaHookDefinition class is trying to instantiate my singleton web driver a second time) and the imports look quite different as cucumber.api.java.After should be cucumber.annotation.After which makes me think that project is not up to date.

[aslakhellesoy]

Feel free to send a pull request. I can't guarantee I'll accept it, but it's always easier to discuss around code.

[rlogiacco]

I spent a few hours on this and I ended up with an implementation that was working withing the JUnit constraints but it was then unable to manipulate the report so I think it's not worth to be evaluated.

Thanks for your attention.

[markwinspear]

Hi. I came across this thread because I am trying to put together a simple framework using a Page Object Model patten using Webdriver and using Cucumber as the BDD framework. I'm not a developer first and foremost, however I have taken the advice of Dave Haeffner in his book 'Selenium Guidebook for Java' in setting up a Base test class which uses JUnit's rule to set up an external resource and set capabilities then fire up a browser either locally or in saucelabs.

I have conflict between this and my cucumber annotations and cannot get the two to play nicely together when my base test class is extended by my SearchTestDefinitions class. I suspect that if the cucumber api supported JUnit rule, I would not get this issue (but as I say, I am not a developer by nature).

Any advice on how to combine the two if possible would be welcomed

The code is at https://github.com/markwinspear/SeleniumCucumberJavaBasicTest2

Many thanks
Mark

[mikeholler]

Rules are important for Android. See #894.

[johndeverall]

I just came across this thread - see Serenity issue serenity-bdd/serenity-core#221

It seems this feature would be very helpful for Spring integration, and a lot of people use Spring in the JVM world. Is there any chance this could be looked at again?

[alb-i986]

+1

I think the solution would be to have cucumber.api.junit.Cucumber extend BlockJUnit4ClassRunner instead of ParentRunner. In fact, BlockJUnit4ClassRunner encapsulates the Rules handling logic.
I'll see if I can find some time working on it.

[johndeverall]

I'm also wanting to put some time into this but haven't looked into it since I last commented as I've been away on holiday. @alb-i986 I'll take a look at what you're suggesting. It sounds like you're ahead of me in conceptualizing a solution. I'll be able to comment more once I take a fresh look at the code.

[alb-i986]

@aslakhellesoy
Would you agree on having cucumber.api.junit.Cucumber extend BlockJUnit4ClassRunner instead of ParentRunner? Can you foresee any issues in doing that?
Thanks

[JasonSmiley208]

I can think of one potential issue, but maybe not an issue (not sure how Cucumber.class is being used).

BlockJUnit4ClassRunner does not work with dependency injection frameworks like Spring. There is Spring JUnit Runner for example and I am assuming other Dependency Injection Frameworks (DIs) use their own runners as well. I know that the Spring Runner current does not support all @rule annotations (in the documentation).

Therefore, if cucumber.api.junit.Cucumber is not the same runner which is used for DI Runner implementations, then I see no potential issue updating the runner (with my limited knowledge).

If this class is being used for by the DI cucumber runners, then you might just need a "CucumberJunitRule" runner for Pure Java implementations.

For the record, I would love to see a Cucumber Runner which would allow me to use rules out of the box :).

Currently I am just pulling in the Rules manually into my projects (copy and paste style) since I usually update them to work with my code base anyways (basically I would pull in my scenario objects for logging purposes)

[rlogiacco]

There is also a JUnit 5 alternative... :)

Il lunedì 29 febbraio 2016, Jason Smiley notifications@github.com ha
scritto:

I can think of one potential issue, but maybe not an issue (not sure how
Cucumber.class is being used).

BlockJUnit4ClassRunner does not work with dependency injection frameworks
like Spring. There is Spring JUnit Runner for example and I am assuming
other Dependency Injection Frameworks (DIs) use their own runners as well.
I know that the Spring Runner current does not support all @rule
https://github.com/Rule annotations (in the documentation).

Therefore, if cucumber.api.junit.Cucumber is not the same runner which is
used for DI Runner implementations, then I see no potential issue updating
the runner (with my limited knowledge).

If this class is being used for by the DI cucumber runners, then you might
just need a "CucumberJunitRule" runner for Pure Java implementations.

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