@Test
public void testUpdate() {
final JPAEnvironment env = getEnvironment();
final EntityManager em = env.getEntityManager();
try {
env.beginTransaction(em);
final Course course = createAndPersistCourse(em);
final Long courseId = Long.valueOf(course.getCourseId());
env.commitTransactionAndClear(em);
env.beginTransaction(em);
// the remove of Doris takes place on the managed entity
em.find(Course.class, courseId).removeAttendee(em.find(Employee.class, EMP_ID_DORIS));
env.commitTransactionAndClear(em);
final Course storedCourse = em.find(Course.class, courseId);
verify(storedCourse != null, "didnt find course again");
verify(storedCourse.getAttendees() != null, "course lost attendees");
verify(
storedCourse.getAttendees().size() == 1,
"number of attendees in course (expected: 1, got: "
+ storedCourse.getAttendees().size()
+ ").");
for (final Employee attendee : storedCourse.getAttendees()) {
verify("Sabine".equals(attendee.getFirstName()), "Wrong attendee: " + attendee);
}
} finally {
closeEntityManager(em);
}
}
@Test
public void testMergeChangedRelation() {
final JPAEnvironment env = getEnvironment();
final EntityManager em = env.getEntityManager();
try {
env.beginTransaction(em);
final Course course = createAndPersistCourse(em);
final Long courseId = Long.valueOf(course.getCourseId());
env.commitTransactionAndClear(em);
env.beginTransaction(em);
// the remove of Doris takes place on the detached entity: but rather than relying on
// cascade, the attendees are retrieved from em again.
course.clearAttendees();
course.addAttendee(em.find(Employee.class, EMP_ID_SABINE));
final List<Employee> attendeesBeforeMerge = course.getAttendees();
verify(
attendeesBeforeMerge.size() == 1,
"wrong number of attendees before merge(): " + attendeesBeforeMerge.size());
final List<Employee> attendeesAfterMerge = em.merge(course).getAttendees();
verify(
attendeesAfterMerge.size() == 1,
"wrong number of attendees after merge(): " + attendeesAfterMerge.size());
env.commitTransactionAndClear(em);
final Course storedCourse = em.find(Course.class, courseId);
verify(storedCourse != null, "didnt find course again");
verify(storedCourse.getAttendees() != null, "course lost attendees");
verify(
storedCourse.getAttendees().size() == 1,
"number of attendees in course (expected: 1, got: "
+ storedCourse.getAttendees().size()
+ ").");
for (final Employee attendee : storedCourse.getAttendees()) {
verify("Sabine".equals(attendee.getFirstName()), "Wrong attendee: " + attendee);
}
} finally {
closeEntityManager(em);
}
}
