Question

Is it possible to unit test addTo* functions in Grails ?

thanks for your help.

Answer 1

The documentation says in section 9.1:

In Grails you need to be particularity
aware of the difference between unit
and integration tests because in unit
tests Grails does not inject any of
the dynamic methods present during
integration tests and at runtime.

You either have to use mockDomain(DomainClassName) in a unit test
or write an integration test:

Grails decorates domain object with some Dynamic methods when the DomainClassGrailsPlugin gets setup(doWithDynamicMethods).