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You can use conditional patternset includes and excludes. Ant properties can be used to turn off tests that are not directly relevant to a developer s work. Developers could construct their own JUnit TestSuite (perhaps exercising each particular subsystem), compiling just the test cases of interest and use the single test case method.

package auction.beans; import ... @Name("register") @Scope(ScopeType.CONVERSATION)

This chapter has shown that writing test cases is important Ant makes unit testing simple by running them, capturing the results, and failing a build if a test fails Ant s datatypes and properties allow the classpath to be tightly controlled, directory mappings to be overridden, and test cases to be easily isolated and run individually This leaves one hard problem: designing realistic tests We recommend the following practices: Test everything that could possibly break This is an XP maxim and it holds A well-written test is hard to pass If all your tests pass the first time, you are probably not testing vigorously enough Add a new test case for every bug you find When a test case fails, track down the problem by writing more tests, before going to the debugger The more tests you have, the better.

@Stateful public class RegisterBean implements Register { @PersistenceContext private EntityManager em; @In(create=true) private transient FacesMessages facesMessages; private User user; public User getUser() { if (user == null) user = new User(); return user; } public void setUser(User user) { this.user = user; }

Test invalid parameters to every method, rather than just valid data Robust software needs to recognize and handle invalid data, and the tests that pass using incorrect data are often the most informative Clear previous test results before running new tests; delete and recreate the test results and reports directories Set haltonfailure="false" on <junit> to allow reporting or other steps to occur before the build fails Capture the failure/error status in a single Ant property using errorProperty and failureProperty Pick a unique naming convention for test cases: *Testjava Then you can use <batchtest> with Ant s pattern matching facility to run only the files that match the naming convention This helps you avoid attempting to run helper or base classes Separate test code from production code Give them each their own unique directory tree with the same package naming structure.

private String verifyPassword; public String getVerifyPassword() { return verifyPassword; } public void setVerifyPassword(String verifyPassword) { this.verifyPassword = verifyPassword; }

@Begin(join = true) public String enterAccount() { if ( verifyPasswordMismatch() || usernameExists() ) { return null; // Redisplay page } else { return "profile"; } }

This lets tests live in the same package as the objects they test, while still keeping them separate during a build Capture results using the XML formatter: <formatter type="xml"/> Use <junitreport>, which generates fantastic color enhanced reports to quickly access detailed failure information Fail the build if an error or failure occurred: <fail if="testfailed"/>..

@IfInvalid(outcome = Outcome.REDISPLAY) public String enterProfile() { return "confirm"; }

Use informative names for tests It is better to know that testDocumentLoad failed, rather than test17 failed, especially when the test suddenly breaks four months after someone in the team wrote it Try to test only one thing per test method If testDocumentLoad fails and this test method contains only one possible point of failure, it is easier to track down the bug than to try and find out which one line out of twenty the failure occurred on Utilize the testing up-to-date technique shown in section 48 Design builds to work as subcomponents, and be sensitive to build inefficiencies doing unnecessary work Writing test cases changes how we implement the code we re trying to test, perhaps by refactoring our methods to be more easily isolated This often leads to developing software that plays well with other modules because it is designed to work with the test case.

@End(ifOutcome = "login") public String confirm() { if ( usernameExists() ) return "register"; // Safety check em.persist(user); facesMessages.add("Registration successful!"); return "login"; } @Remove @Destroy public void destroy() {} private boolean usernameExists() { List existing = em.createQuery("select u.username from User u" + " where u.username = :uname") .setParameter("uname", user.getUsername()) .getResultList(); if (existing.size() != 0) { facesMessages.add("Username exists"); return true; } return false; } private boolean verifyPasswordMismatch() { if (!user.getPassword().equals(verifyPassword)) { facesMessages.add("Passwords do not match"); verifyPassword = null; return true; } return false; } }