DGG Confusion #1 (among many to come, I'm sure)

I'm working my way through The Definitive Guide to Grails. Chapter 6 covers testing, and I'm a bit stuck on the GroovyMock example in listing 6-9. I'm using Grails 1.0.2, and as entered*, the test fails with "No call to 'getParams' expected at this point. Still 1 call(s) to 'redirect' expected." I tried demanding a call to getParams, but that leads down a path of yet more confusing errors.

So, I'll keep beating my head against it for a while, and hopefully post back with some results.

*

void testUpdateNotFound() {
 def bc
 def mock = new MockFor(BookmarkController)
 mock.demand.redirect { Map params ->
     assert params.action == bc.edit
 }
 mock.use {
     bc = new BookmarkController()
     bc.params.id = 5
     bc.update.call()
 }
}

[UPDATE] Nothing that a little Googling won't help, and I'm happy to know I'm not just insane (well, at least not with this particular problem). I'm using version 1.5.1, and according to a bug report, Groovy's MockFor is a bit squiffy in versions 1.5.1 and 1.5.4. Unfortunately, the bug's still open, so I'll have to pass over that part of the book for now. I can do that in good conscience. :o)

[UPDATE #2] This works with Groovy 1.5.6 (with "method pointers"):

import groovy.mock.interceptor.*

class BookmarkController {
    def update = { redirect("value from original") }
    def redirect = { println "Original class: $it" }
}

class BookmarkTests extends GroovyTestCase {
    void testUpdate() {
        def bc
        def mock = new MockFor(BookmarkController)
        mock.demand.redirect { println "Mock class: $it" }
        mock.use {
            bc = new BookmarkController() 
            bc.&update.call()
        }
    }
}

new BookmarkController().&update.call()
new BookmarkTests().testUpdate()

...but I'm not sure that does much for DGG Listing 6-9. Hmph.