### Question:
PermissionManager { public void deleteUser(String login) { if (login == null) { throw new TabMissingValueException("Cannot update user: user login is null"); } Person userDB = getUserByLogin(login); daoFactory.getUserDAO().deleteById(userDB.getId()); } PermissionManager(EntityManager entityManager); static Options createUserDefOptions(); @SuppressWarnings("static-access") static Options createUserDefOptions(Options baseOptions); @SuppressWarnings("static-access") static Options createPermModOptions(Options baseOptions); static Options createPermModOptions(); Person createNewUserFromOptions(String login, CommandLine cmdl); void validateUser(Person user); long addUser(Person user); void updateUser(Person user); void deleteUser(String login); void setStudyOwners(CommandLine cmdl); void setStudyOwners(String spec); void setStudyOwners(String studyAcc, String operation, String... logins); void setStatus(CommandLine cmdl, VisibilityStatus status); void setVisibility(CommandLine cmdl); void setPrivate(String spec); void setPrivate(String... studyAccs); void setStatus(VisibilityStatus status, String... studyAccs); void setPublic(String spec); void setPublic(String... studyAccs); @SuppressWarnings("unchecked") List<Study> getStudies(); @SuppressWarnings("unchecked") List<Person> getUsers(); Person getUserByLogin(String login); Study getStudyByAcc(String acc); static String formatUser(Person user); static String formatStudy(Study study); final static String[] VALID_DATE_FORMATS; }### Answer:
@Test public void testDeleteUser() { Person user = createTestUser(); PermissionManager permMgr = new PermissionManager(entityManager); permMgr.deleteUser(user.getUserName()); commitTansaction(); session.flush(); try { permMgr.getUserByLogin(user.getUserName()); } catch (TabInvalidValueException e) { return; } fail("User deletion failed!"); }