Grails Controller Unit Test to verify layout and template specified in render call

ajax.gsp

<%-- located in views/layouts/ajax.gsp --%>
<g:layoutBody/>
<r:layoutResources disposition="defer"/>

AjaxlayoutController.groovy

/* action that renders a template back to browser,
 * and uses custom simple 'ajax' layout */
def ajaxResults() {
	def results = workService.querySomeWork()
	render (template: "ajaxResults", model:[results:results as JSON], layout:'ajax')
}

AjaxlayoutControllerSpec.groovy

void "ajaxResults action renders correct template and layout"() {
	given: 'template is mocked out'
	views['/ajaxlayout/_ajaxResults.gsp'] = '${results}'

	when: 'ajaxResults url is hit'
	controller.ajaxResults()

	then: 'proper template and layout are rendered'
	1 * workService.querySomeWork() >> [[name:'jeff',count:23],[name:'scott',count:12]]
	
	//Tests that results were injected as json into ajaxResults template
	response.contentAsString == '[{"name":"jeff","count":23},{"name":"scott","count":12}]'
	
	//Tests that sitemesh layout of 'ajax' was specified in render attribute
	request[GrailsLayoutDecoratorMapper.LAYOUT_ATTRIBUTE] == 'ajax'

	response.redirectedUrl == null
}