MetaClassMixin

gistfile1.groovy

import grails.test.GrailsUnitTestCase

@Category(GrailsUnitTestCase)
class MetaClassMixin {
    Delegate metaClassFor(Class clazz) {
        registerMetaClass(clazz)

        new Delegate(target: clazz.metaClass)
    }

    Delegate staticMetaClassFor(Class clazz) {
        registerMetaClass(clazz)

        new Delegate(target: clazz.metaClass.'static')
    }

    private static class Delegate {
        Object target

        @Override
        void setProperty(String property, Object newValue) {
            target.setProperty(property, newValue)
        }
    }
}