### Question:
SecurityServiceImpl extends RemoteServiceServlet implements SecurityService { @Override public void logout() { try { Session session = ServiceUtil.validateSession(getThreadLocalRequest()); if (session == null) return; FileUtils.forceDelete(UserUtil.getUserResource(session.getUserId(), "temp")); log.info("User {} logged out and closed session {}", session.getUsername(), session.getSid()); kill(session.getSid()); } catch (Throwable e) { log.error(e.getMessage(), e); } }  static GUITenant getTenant(long tenantId); static GUITenant fromTenant(Tenant tenant); static GUITenant getTenant(String tenantName); GUISession loadSession(Session sess, String locale); @Override GUISession getSession(String locale); @Override void logout(); @Override int changePassword(Long requestorUserId, long userId, String oldPassword, String newPassword,
			boolean notify); @Override void addUserToGroup(long groupId, long userId); @Override void deleteGroup(long groupId); @Override void deleteUser(long userId); @Override GUIGroup getGroup(long groupId); @Override GUIUser getUser(long userId); @Override void removeFromGroup(long groupId, long[] userIds); @Override GUIGroup saveGroup(GUIGroup group); @Override GUIUser saveUser(GUIUser user, GUIInfo info); @Override GUIUser saveProfile(GUIUser user); @Override GUIUser saveInterfaceSettings(GUIUser user); @Override void kill(String sid); @Override GUISecuritySettings loadSettings(); @Override boolean saveSettings(GUISecuritySettings settings); @Override void applyRights(GUIMenu menu); @Override GUIMenu getMenu(long menuId); @Override GUIUser[] searchUsers(String username, String groupId); @Override GUISequence[] loadBlockedEntities(); @Override void removeBlockedEntities(long[] ids); @Override void replicateUsersSettings(long masterUserId, Long[] userIds, boolean gui, boolean groups);  }### Answer:
@Test public void testLogout() { Assert.assertEquals("admin", session.getUser().getUsername()); Assert.assertEquals(1, session.getUser().getId()); int sessions = SessionManager.get().countOpened(); service.logout(); Assert.assertEquals(sessions - 1, SessionManager.get().countOpened()); }