The document discusses unit testing best practices including using mocks and test data builders. It defines mocks and builders, provides examples of using them in domain model and service tests, and recommends resources for further reading on the topic. The examples demonstrate how to set up mocks and build test data to isolate the system under test and make tests maintainable.

3. Protocol => Mocks Data => Builders

5. Define Maintainable Unit Test

8. Shared Vocabulary

9. Mocks Builders

11. xUnit Test Patterns

12. Mocks Builders

16. Examples

18. Domain Model

19. public void should_recognize_pediatric_patient() { // setup Patient sut = aPatient ().age(17).build(); // exercise and verify assertTrue (sut.isPediatric()); assertTrue (!sut.isAdult()); }

20. public void should_recognize_pediatric_patient() { // setup Patient sut = aPatient ().age(17).build(); // exercise and verify assertTrue (sut.isPediatric()); assertTrue (!sut.isAdult()); }

21. public void should_recognize_pediatric_patient() { // setup Patient sut = aPatient ().age(17).build(); // exercise and verify assertTrue (sut.isPediatric()); assertTrue (!sut.isAdult()); } aPatient ().dob(april(1, 1992)).build();

23. public class CareTeamMembershipService implements ICareTeamMembershipService { private CareTeamMembershipDao careTeamMembershipDao ; public void addMember(Patient patient, CareTeam careTeam) { if (!patient.isRegisteredAt(careTeam.getFacility())) { throw new CareTeamAdminException(); } if (!patient.meets(careTeam.getMembershipCriteria())) { throw new CareTeamAdminException(); } careTeamMembershipDao .create( patient.getId(), careTeam.getId()); } }

24. private final CareTeamMembershipDao careTeamMembershipDao = context .mock(CareTeamMembershipDao. class ); private final ICareTeamMembershipService sut = createCareTeamMembershipService(); public void should_permit_add_for_appropriate_care_team() { // setup final Facility jacobi = aFacility ().build(); final Patient patient = aPatient ().at(jacobi).age(18) .with(Diagnosis. DIABETES ).build(); final CareTeam careTeam = anAdultCareTeam ().at(jacobi) .with(Diagnosis. DIABETES ).build(); // verify context .checking( new Expectations() {{ one( careTeamMembershipDao ).create( patient.getId(), careTeam.getId()); }}); // exercise sut .addMember(patient, careTeam); }

25. private final CareTeamMembershipDao careTeamMembershipDao = context .mock(CareTeamMembershipDao. class ); private final ICareTeamMembershipService sut = createCareTeamMembershipService(); // verify @Test (expected=CareTeamAdminException. class ) public void should_disallow_add_adult_to_pediatric_care_team() { // setup final Facility jacobi = aFacility ().build(); final Patient patient = aPatient ().at(jacobi).age(18) . with (Diagnosis. DIABETES ).build(); final CareTeam careTeam = aPediatricCareTeam ().at(jacobi) .with(Diagnosis. DIABETES ).build(); // exercise sut .addMember(patient, careTeam); }

27. When to Use Mocks

28. Mocks Builders

29. Protocol Data

30. Protocol => Mocks Data => Builders

36. Credits Obstacle Race http://www.flickr.com/photos/foxypar4/1004464889/ Einstein Blackboard Writing Generator http://generator.kitt.net/2006/12/ einstein-blackboard-writing-generator.html Holy Grail http://www.flickr.com/photos/ spiritual_marketplace/2207966935/