Question

I have a service class method in my grails porject which uses a helper class to fetch the response as xml. The xml is then send out as the response of the service class method.

ServiceClass:-

class ItemService{
def getItem(Number) {
        def HelperClass helper = new HelperClass()
        def responseXml = helper.getMessage(Number)                 
        return responseXml
    }
}

I writing a test case for this method. In my test case, i wish to mock

    def responseXml = helper.getMessage(Number) 

The test case that i have written so far is:

class ItemServiceTest extends GroovyTestCase {
public final void testFindItem(){
        def service = new ItemService()

        def xml = "<Item><Number>123</Number></Item>"

        def mockJobServiceFactory = new MockFor(HelperClass)
        mockJobServiceFactory.demand.getMessage{ def str ->
            return xml
        }
        service.getItem().HelperClass =  mockJobServiceFactory.proxyInstance()

        def item = service.getItem()("123")
        assertNotNull(item)
    }

but still, the mock does not return the xml that I speicified in the test case.
Any problems that you see in the above approach?…Advance Thanks

Answer 1

When you mock objects with MockFor, you need to surround the code that uses the mock in a use closure. Try this:

def service = new ItemService()

def xml = "<Item><Number>123</Number></Item>"

def mockJobServiceFactory = new MockFor(HelperClass)
mockJobServiceFactory.demand.getMessage{ def str ->
    return xml
}

mockJobServiceFactory.use {
    def item = service.getItem()("123")
    assertNotNull(item)
}