testing - Grails unit or integration tests? -

i don't know whether use unit or integration tests wanting test in grails 2.2.3 application. want run tests against 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 going require use of our test database, make integration test? when run code unit test fails @ assert s != null. means isn't using our database, because should find student id.

in grails unit test can test domain class interactions using gorm , behind scene grails use in-memory database(an implementation of concurrenthashmap) mimic behavior here. yes null because student not exist in in-memory database , need insert data first.

student.findorsavewhere (firstname: 'grant',lastname : 'mcconnaughey') 

in example, if intention test existence of data need use integration test , connect database using datasource.groovy , not idea unless have reason test data.

if trying test def s = student.findbyid(myid) again not adding value grails dynamic finder , need trust framework using.

however, in general

unit tests typically run without presence of physical resources involve i/o such databases, socket connections or files link

i hope helps