Grails - “Cannot get property 'grails' on null object” from unit test

Question

I get the following error...

Cannot get property 'grails' on null object
java.lang.NullPointerException: Cannot get property 'grails' on null object
    at pcc.EmailSharerController.<init>(EmailSharerController.groovy)
    at grails.test.MvcUnitTestCase.newInstance(MvcUnitTestCase.groovy:102)
    at grails.test.ControllerUnitTestCase.super$6$newInstance(ControllerUnitTestCase.groovy)
    at grails.test.ControllerUnitTestCase.newInstance(ControllerUnitTestCase.groovy:112)
    at grails.test.ControllerUnitTestCase.setUp(ControllerUnitTestCase.groovy:55)
    at pcc.EmailSharerControllerTests.super$7$setUp(EmailSharerControllerTests.groovy)
    at pcc.EmailSharerControllerTests.setUp(EmailSharerControllerTests.groovy:12)

...when I run the unit test setUp() of my EmailSharerController , even when it is reduced to this:

protected void setUp() {
        super.setUp()  
}

I have browsed the web and found nothing. I do not any guess from where it could come. Any help greatly apreciated :)

Answer 1

Problem was that Grails does not support the ConfigurationHolder object in unit tests. It is possible to solve it this way:

mockConfig("""  
        grails {
            serverURL = 'my domain name'
        }
    """)

to call the grails.serverURL property of Config.groovy for example.