running grails 2.1.3 tests in Intellij Idea: Bizarre error in Spock test: Cannot add Domain class [class x.y.Z]. It is not a Domain

Question

I am in the process of upgrading to grails 2.1.x, and need to redo some of my old-style tests.

I just added a new test to my spock Spec, and for this test I need to mock an additional Domain class.

Before this, I had:

@Mock([Event, EventType])

Now I have:

@Mock([Event, EventType, Notification])

Notification.groovy is in the same exact package and physical directory than Event and EventType (under grails-app/domain) so it definitely is a grails domain class.

When I try to run my test I get the following stack trace:

org.codehaus.groovy.grails.exceptions.GrailsConfigurationException: Cannot add Domain class [class x.y.Notification]. It is not a Domain!
    at org.codehaus.groovy.grails.commons.DefaultGrailsApplication.addArtefact(DefaultGrailsApplication.java:911)
    at org.codehaus.groovy.grails.commons.DefaultGrailsApplication.addArtefact(DefaultGrailsApplication.java:615)
    at grails.test.mixin.domain.DomainClassUnitTestMixin.mockDomain(DomainClassUnitTestMixin.groovy:131)
    at grails.test.mixin.domain.DomainClassUnitTestMixin.mockDomain(DomainClassUnitTestMixin.groovy:128)

When I go through the rabbit hole and start debugging the execution, I get to this portion of DomainClassArtefactHandler (line 87):

            // make sure the identify and version field exist
            testClass.getDeclaredField(GrailsDomainClassProperty.IDENTITY);
            testClass.getDeclaredField(GrailsDomainClassProperty.VERSION);

this blows up with an exception, because I guess the id field is not present

So something is going wrong, the GORM fields are not added before this is executed.

Does anyone have a suggestion of what I need to do? Do I need to mark my domain class as an @Entity (this actually makes my test pass)?

I am pretty sure that's not supposed to be mandatory for my unit test to pass.

Any advice?

UPDATE: Actually, I have just discovered that this issue only arises when I run the unit tests inside my IDE: intellij Idea 12.1

Issues created, with test app here:

http://jira.grails.org/browse/GRAILS-9989

http://youtrack.jetbrains.com/issue/IDEA-105087

When I remove the static mapping blocks in both domain classes, the test passes!

Answer 1

It seems like the issue was due to IDEA not cleaning up correctly from one test run to another. The tests pass once you Rebuild the project.