How do I use executeQuery in grails testcase?

Question

How do I use executeQuery in grails testcase?

A error : groovy.lang.MissingMethodException: No signature of method ***.executeQuery() is applicable for argument types: () values: []

I have already called mockDomain.

By the way, it is in unit test.

Thanks!

Answer 1

There's no support for HQL queries in unit tests yet, but we're working on it. But you shouldn't be doing persistence tests with mocks. Persistence tests should be done against a database in an integration test.

I usually move HQL queries to the domain class as static query methods. This way they're easy to mock in a unit test of a controller, service, etc. and then I test the method as part of the domain class integration test.

For example I'd have

class User {
   String username
   String password
   ...

   static List findAllUsersBlahBlah(String foo, boolean bar) {
      executeQuery('from User u where ...')
   }
}

Then in a unit test I can mock that method with fake data since I don't care about persistence in a controller unit test - I know that it's properly tested in the correct place and I want to focus on the class under test, not its collaborators:

def users = [new User(...), new User(...)]
User.metaClass.static.findAllUsersBlahBlah = { String foo, boolean bar -> users }

Answer 2

We have successfully mocked executeQuery with Grails 2.0 in our project

@TestFor(BookController)
@TestMixin([DomainClassUnitTestMixin,ServiceUnitTestMixin])
@ConfineMetaClassChanges([Book])
class BookControllerSpec extends Specification{
   mockDomain(Book)
   Book.metaClass.static.executeQuery = {a,b,c-> return [Book]}