bits and pieces

December 27, 2011

Grails, Geb: Executing multiple functional test phases together

Filed under: Uncategorized — Tags: , , — roshandawrani @ 12:43 pm

A little trick before 2011 goes to books:

Some time back, we had this need to execute some time consuming functional tests that covered Facebook integration for our Grails application. We decided to go ahead and define a separate test phase and not mix these tests with the usual app-level functional tests to not lengthen our build cycles by much. By not mixing up the functional and facebook phase tests, we had more flexibility on when we wanted to run “facebook” tests, and when we didn’t.

The article “Custom Grails Test Types / Phases” is mostly the approach we took for defining the custom phase. In addition, we had to introduce some work arounds to share some test classes between the two phases – as, by default, Grails uses an isolated classloader for each test phase, and doesn’t provide a mechanism to easily share the “common” classes.

There was another issue though, and this little trick is about that issue.

It seems the embedded Tomcat instance that Grails uses, did not get cleanly shutdown at the end of “functional” phase and then restarted at the beginning of “facebook” phase, if both the test phases got executed together. There was some mix-up related to a thread-pool inside the embedded Tomcat, which caused 2nd startup of Tomcat to see the same pool, which was in the “CLOSING” state. Seeing it in that state, it would decide to abort the startup. Adding some delay also did not reliably help.

The way we finally avoided the problem is by not shutting the tomcat down after “funtional” phase, and not trying to start it in the beginning of “facebook” phase, when both the phases are run together. If only one of these phases is executed, then Tomcat start-up and shutdown happens normally. Here are the relevant code snippets:

def originalFunctionalTestPhaseCleanUp

eventTestPhaseStart = { phase ->
    // record which phase is being run currently
    testPhaseBeingRun = phase
    ....
}
 
eventAllTestsStart = {
    /* replace the Grails' original functionalTestPhaseCleanUp call so that we can decide for ourselves whether to do it or leave it upto facebook phase */
    originalFunctionalTestPhaseCleanUp = owner.functionalTestPhaseCleanUp
    owner.functionalTestPhaseCleanUp = myFunctionalTestPhaseCleanUp
    
    addFacebookTestPhase()
 }
 
addFacebookTestPhase = {
    ....
    // define our custom 'facebook' phase with Grails, as described in LD's article mentioned above.
    ....
}

// callback made by Grails for phase as "${phase}TestPhaseCleanUp"() 
facebookTestPhasePreparation = {
    // Skip starting the app, if 'functional' phase is also run, as it is already started by functional phase by this point.
    if(testPhaseBeingRun == 'facebook' && !filteredPhases.containsKey('functional')) {
        functionalTestPhasePreparation()
    }
}

// override the default functionalTestPhaseCleanUp behavior, so that we do the clean-up only once
myFunctionalTestPhaseCleanUp = {
    // Skip shutting down the app if 'facebook' phase is also run. It will be shutdown at the end of facebook phase.
    if(testPhaseBeingRun == 'functional' && !filteredPhases.containsKey('facebook')) {
        originalFunctionalTestPhaseCleanUp()
    }
}
 
facebookTestPhaseCleanUp = {
    // finally the usual cleanup that is done after functional phase.
    functionalTestPhaseCleanUp()
}

Hope it helps someone having similar needs / issues.

November 10, 2011

Using Geb based functional tests in a “custom” Grails test phase

Filed under: Uncategorized — Tags: , , — roshandawrani @ 12:37 pm

Forget it! It’s not supported (at least as of Geb 0.6.0). Just spent my morning investigating it.

I had this need to setup a separate set of functional tests (functional by nature, not in terms of Grails functional test phase packaging) that needed some special external interfaces that were not always available. A “custom” test phase seemed perfect for my needs that would include these tests that would not run as part of ‘> grails test-app’ or ‘> grails test-app functional:’, but would run just when and where I needed them – maybe once a day, after making sure that its external interfaces up – ‘> grails test-app custom:’.

Following Luke Daley’s very helpful article “Custom Grails Test Types / Phases”, I setup a custom test phase and started writing some Geb-Spock plugin based tests, only to find out that Geb is married to the test phase name “functional”. So there doesn’t seem be an opportunity to use Geb in a custom Grails test phase. :-(

Update 1 (23-Nov-11): The following issue has been filed to configure Geb to work with other test phases: http://jira.codehaus.org/browse/GEB-137

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