Just added a simple test with a JPAQuery.

src/main/java/se/su/dsv/scipro/springdata/serviceimpls/SupervisorServiceImpl.java

@@ -45,7 +45,11 @@ public class SupervisorServiceImpl extends AbstractQueryService<Employee, Long>
     }
 
     @Override
-    public List<Employee> findByUsersName(final Date dateCreated) {
+    public Iterable<Employee> findByUsersName(final Date dateCreated) {
+
+        //queryDslPredicateExecutor.findOne();
+
+
         QEmployee employee = QEmployee.employee;
         BooleanExpression lastName = employee.user.lastName.eq("Vahlman");
         BooleanExpression isNewEmployee = employee.user.dateCreated.eq(dateCreated);

src/main/java/se/su/dsv/scipro/springdata/services/SupervisorService.java

@@ -11,5 +11,5 @@ import java.util.List;
 public interface SupervisorService extends CrudService<Employee,Long>, QueryService<Employee, Long> {
     public List<Employee> findAllEmployees(org.springframework.data.domain.Sort orders);
 
-    public List<Employee> findByUsersName(final Date dateCreated);
+    public Iterable<Employee> findByUsersName(final Date dateCreated);
 }

src/test/java/se/su/dsv/scipro/springdata/TestSupervisor.java

@@ -144,7 +144,9 @@ public class TestSupervisor {
         Employee vahlman = getEmployee("Tom", "Vahlman", "tom@dsv.su.se");
         vahlman.getUser().setDateCreated(dateCreated);
         vahlman =  supervisorService.save(vahlman);
-        employeeList.addAll(supervisorService.findByUsersName(dateCreated));
+        for(Employee employee : supervisorService.findByUsersName(dateCreated)) {
+            employeeList.add(employee);
+        }
         assertFalse(employeeList.isEmpty());
         assertTrue(employeeList.get(0).equals(vahlman));
     }