Grails Spock testing Controller and service

Question

Hi I have a controller called ApiController which uses a service called ApiService like so:

def createCategory(){
        def jsonObj = request.JSON
        jsonObj.each{ key, value ->
            params.put(key,value)
        }
        render apiService.createCategory(params)
}

Which works fine. But I cannot seem to write a test for it.

This is how far I have got:

@TestFor(ApiController)
@Mock([Category,ApiService])   
class CategorySpec extends Specification {

    def setup() {
    }

    def cleanup() {
    }

    void "test"() {

        setup:
        def apiService = Mock(ApiService)

        when:
        request.method = 'POST'
        request.requestMethod = 'POST'
        params.categoryID = 'test'

        controller.createCategory()

        then:
        println(response)
        1==1

    }

From this I get the following error:

java.lang.NullPointerException: Cannot invoke method createCategory() on null object

This is obviously because It cannot see my apiService bean. So My question is how do i do this in Spock?

Answer 1

It's most likely to do with the Transactional bug : https://github.com/grails/grails-core/issues/1501

ApiService apiService = new ApiService()
controller.apiService = apiService
apiService.transactionManager = Mock(PlatformTransactionManager) { getTransaction(_) >> Mock(TransactionStatus) }

This is a temporary fix (as per the bug report comment) ... this has worked for me :)

Answer 2

This is how I would do it in Grails 2.4, without annotation @Mock on the spec class:

when:
    def serviceMock = mockFor(ApiService)
    serviceMock.demand.createCategory { def params -> "output sample" }
    controller.apiService = serviceMock.createMock()
    controller.createCategory()