Grails unit or integration tests?

问题

I don't know whether to use unit or integration tests for what I am wanting to test in my Grails 2.2.3 application. I want to run some tests against like this:

@TestFor(Student)
@Mock(Student)
class StudentTests {

void testFoundStudent() {
        def s = Student.findById(myId)
        assert s != null
        assert s.firstName = 'Grant'
        assert s.lastName = 'McConnaughey'
    }
}

This is going to require the use of our test database, so would that make it an integration test? When I run this code as a unit test it fails at assert s != null. Which means it isn't using our database, because it SHOULD find a student with that ID.

回答1:

In Grails unit test you can test domain class interactions using Gorm and behind the scene Grails will use in-memory database(an implementation of a ConcurrentHashMap) to mimic this behavior here. So yes you get null because that student does not exist in in-memory database and you need to insert that data first.

Student.findOrSaveWhere (firstName: 'Grant',lastName : 'McConnaughey')

In your example, if the intention is to test the existence of that data you need to use integration test and connect it to your database using datasource.groovy , which is really not a good idea unless you have a good reason to test your data.

If you are trying to test def s = Student.findById(myId) again that is not adding any value as that is Grails dynamic finder and you probably need to trust the framework you are using.

However, in general