@Test
    public void shouldThrowWhenUpdatingSessionWithAlreadyAssignedAdminOrRoom(){
        SessionCreateRequest createRequest = loadCreateRequest("session-1")
                .setStartDate(DateUtils.getDateWithHoursOffset(2))
                .setAssignments(Collections.singletonList(new SessionAssignment().setAdmin("asd").setRoom("dasdadsad")));
        Session session1 = sessionsController.createSession(createRequest);


        SessionCreateRequest createRequest2 = loadCreateRequest("session-1")
                .setStartDate(DateUtils.getDateWithHoursOffset(3));

        Session session = sessionsController.createSession(createRequest2);

        SessionUpdateRequest updateRequest = new SessionUpdateRequest();
        updateRequest.setAssignments(Collections.singletonList(
                new SessionAssignment().setRoom("room").setAdmin("admin1")))
                .setStartDate(session1.getStartDate());

        try{
            sessionsController.updateSession(session.getId(), updateRequest);
        } catch (IllegalSessionOperationException e){
            ApiError error = e.toApiError();
            assertEquals("DuplicateRoomAssignment", error.getCode());
        }
    }