Testing service implementations without creating a spring context.

gistfile1.groovy

class SomeServiceImplTest extends Specification {

  SomeServiceImpl underTest
  SomeDao someDao
  SomeOtherService someOtherService
  
  void setup() {
    // create the instance under test
    underTest = new SomeServiceImpl()
    
    // mock all dependencies and inject them
    someDao = Mock(SomeDao)
    someOtherService = Mock(SomeOtherService)
    underTest.someDao = someDao;
    underTest.someOtherService = someOtherService
  }
  
  void "Test that save invokes the Dao"() {
    when:
    someService.save("SomeValue")
    
    then:
    1 * someDao.save("SomeValue")
  }
}