Saturday, August 8, 2009

Testing is Simple

In previous articles we created a simple helloworld application without any tests. This article shows how to do integration testing of services with Sculptor.

Alternative video format (mpg)

We turn on generation of junit test and complete the failing tests from previous articles. For each Service there is a generated JUnit test class that we are encouraged to implement. It uses Spring transactional test fixtures and DbUnit.

Spring beans are injected in the test with ordinary @Autowired annotations.

public class PlanetServiceTest extends AbstractDbUnitJpaTests
implements PlanetServiceTestBase {
private PlanetService planetService;

public void setPlanetService(PlanetService planetService) {
this.planetService = planetService;

public void testFindById() throws Exception {
Planet found = planetService.findById(getServiceContext(), 1L);
assertEquals("Earth", found.getName());

public void testFindAll() throws Exception {
List<Planet> found = planetService.findAll(getServiceContext());
assertEquals(2, found.size());

public void testSave() throws Exception {
int countBefore = countRowsInTable("PLANET");
Planet planet = new Planet("Pluto");
planet.setPopulation(0L);, planet);
assertEquals(countBefore + 1, countRowsInTable("PLANET"));

public void testDelete() throws Exception {
int countBefore = countRowsInTable("PLANET");
Planet planet = planetService.findById(getServiceContext(), 2L);
planetService.delete(getServiceContext(), planet);
assertEquals(countBefore - 1, countRowsInTable("PLANET"));

The initial test data is defined in DbUnit xml file. The database is refreshed for each test method.
<?xml version="1.0" encoding="UTF-8"?>

<PLANET ID="1" NAME="Earth" POPULATION="7000000000" VERSION="0"/>

Above tests only covers the normal cases so far and we should of course do more tests for exceptional cases and validation boundaries, such as negative population.

The tests illustrated here are kind of integration tests and you should do ordinary unit tests for domain objects and other classes of importance.

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