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9.5 Creating a stateful session bean unit test 9.6 Creating an entity bean unit test 9.7 Automating test case execution 9.8 Executing test cases using a UI
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You want to create a unit test for a stateful session Enterprise JavaBean.
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Unit-testing stateful session beans helps you to catch errors in your business logic and integration with other resources. Using Cactus, you can create tests that execute in the EJB container in order to test not only the business logic, but also the deployment of the EJBs in the EJB container. Testing stateful session beans using Cactus helps you test an EJB s dependencies on the application server. For example, a stateful session bean might use a data source or other EJB. Please read recipe 9.4 for the common requirements for building a Cactus test case class.
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The test case class in listing 9.7 provides a single test method, testIncrement(), that tests a business method upon a stateful session bean.
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Listing 9.7 TestStateful.java
import org.apache.org.*; import junit.framework.*; public class TestStateful extends ServletTestCase{ public TestStateful(String theName){ super(theName); Initializes the test }
class with a name
public static Test suite(){ return new TestSuite(TestServlet.class); } public void testIncrement(){ int count = 0; try{ TestStatefulHome home = lookupHome(); TestStateful session = createSession(home);
Creates and returns a suite class
session.increment(); count++; assertEquals(count,session.getCurrentCount()); session.increment(); count++; assertEquals(count,session.getCurrentCount());
Tests a comparison with a counted value
Creating a stateful session bean unit test
session.increment(); count++; assertEquals(count,session.getCurrentCount()); } catch(Exception e){ e.printStackTrace(); System.out.println("Failed Working with Session:" +e.getMessage()); } } private TestStateful createSession( TestStatefulHome home ) throws ObjectNotFoundException, Creates a session bean CreateException,RemoteException { TestStateful session = null; System.out.println("Creating Session"); Session = (TestStateful) PortableRemoteObject.narrow( home.create(), TestStateful.class); System.out.println("Created Session"); return session; } private TestStatefulHome lookupHome() throws NamingException{ Context ctx = new InitialContext();
from a home object
Looks up a home object
for a session bean System.out.println("Looking up Home"); TestStatefulHome home = (TestStatefulHome) ctx.lookup("testStateful"); Home = (TestStatefulHome) PortableRemoteObject.narrow( home, TestStatefulHome.class); return home;
Discussion
Executing tests against a stateful session bean is similar to running tests against a stateless session bean. In the case of stateful beans, you have the added ability of storing and retrieving state information during a test. Therefore, you should construct your tests with this in mind. As we also discussed in the previous recipe, you can factor out the EJB lookup in each test method by storing a reference to the bean in a local member variable. In the case of stateful bean tests, use the local variable to test the state of the EJB.
Deploying and unit testing
See also
9.4 Creating a stateless session bean unit test 9.6 Creating an entity bean unit test 9.7 Automating test case execution 9.8 Executing test cases using a UI
9.6 Creating an entity bean unit test
Problem
You want to create a unit test for an entity Enterprise JavaBean.
Background
Unit-testing entity Enterprise JavaBeans means testing not only business logic, but also database access and schema mappings. Unit-testing your entity beans lets you test for incorrect column names, finder methods, and overall database usage. This is especially important when using bean-managed persistence, where errors are more likely to exist. Please read recipes 9.4 and 9.5 before using this recipe; they provide the foundation for building Cactus test cases.
Recipe
This recipe tests the ability to create and find a particular entity bean. Here we are testing the entity schema and the integration with the application server. The test case class in listing 9.8 provides two test methods one that tests the ability to create an entity bean, and one that tests the ability to find a bean.
Listing 9.8 TestEntity.java
import org.apache.org.*; import junit.framework.*; public class TestEntity extends ServletTestCase{ public TestEntity(String theName){ super(theName); Initializes the test }
class with a name
public static Test suite(){ return new TestSuite(TestEntity.class); } public void testCreateEntity(){
Creates and returns a suite class
Tests the creation of an entity bean
Creating an entity bean unit test
try{ TestEntityHome home = lookupHome(); TestEntity entity = createEntity("This is a test",home); } catch(Exception e){ e.printStackTrace(); System.out.println("Failed Finding Entity:"+e.getMessage()); } } public void testFindEntity(){ Integer id = null; try{ TestEntityHome home = lookupHome(); //---------[ Create the entity ]--------------// TestEntity entity = createEntity("This is a test",home); id = entity.getEntityId(); System.out.println("Created Entity with ID:" +id.intValue()); //---------[ Find the entity ]--------------// entity = findEntity(id, home); //---------[ Check the id to be identical ]-----------// assertEquals(id, entity.getEntityId());
} created and found catch(Exception e){ e.printStackTrace(); System.out.println("Failed Finding Entity:"+e.getMessage()); } } private TestEntity createEntity(String txt, TestEntityHome home) throws ObjectNotFoundException, Creates the test CreateException,RemoteException { TestEntity entity = null; Integer id = null; System.out.println("Creating Entity with ID: "+txt); entity = (TestEntity) PortableRemoteObject.narrow( home.create(txt), TestEntity.class); id = entity.getEntityId(); System.out.println("Created Entity with ID: "+id.intValue()); return entity; } private TestEntity findEntity(Integer id, TestEntityHome home) throws ObjectNotFoundException, FinderException, Finds the test CreateException, RemoteException {
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