use std::collections::HashSet;
use std::rc::Rc;
use std::sync::mpsc::Sender;
use std::time::Duration;
use std::io;
use time;
use byteorder::*;
use core::{EndpointId, Message};
use core::socket::{Protocol, Reply};
use core::config::ConfigOption;
use core::endpoint::Pipe;
use core::context::{Context, Schedulable};
use super::priolist::Priolist;
use super::pipes::PipeCollection;
use super::{Timeout, SURVEYOR, RESPONDENT};
use super::policy::{broadcast, fair_queue};
use io_error::*;
pub struct Surveyor {
inner: Inner,
state: Option<State>
}
enum State {
Idle,
Active(PendingSurvey),
Receiving(EndpointId, Option<PendingSurvey>, Timeout),
RecvOnHold(Option<PendingSurvey>, Timeout)
}
struct Inner {
reply_tx: Sender<Reply>,
pipes: PipeCollection,
bc: HashSet<EndpointId>,
fq: Priolist,
survey_id_seq: u32,
is_device_item: bool,
deadline: Duration
}
struct PendingSurvey {
id: u32,
timeout: Timeout
}
impl Surveyor {
fn apply<F>(&mut self, ctx: &mut Context, transition: F) where F : FnOnce(State, &mut Context, &mut Inner) -> State {
if let Some(old_state) = self.state.take() {
#[cfg(debug_assertions)] let old_name = old_state.name();
let was_send_ready = old_state.is_send_ready(&self.inner);
let was_recv_ready = old_state.is_recv_ready(&self.inner);
let new_state = transition(old_state, ctx, &mut self.inner);
let is_send_ready = new_state.is_send_ready(&self.inner);
let is_recv_ready = new_state.is_recv_ready(&self.inner);
#[cfg(debug_assertions)] let new_name = new_state.name();
self.state = Some(new_state);
ctx.check_send_ready_change(was_send_ready, is_send_ready);
ctx.check_recv_ready_change(was_recv_ready, is_recv_ready);
#[cfg(debug_assertions)] debug!("[{:?}] switch from {} to {}", ctx, old_name, new_name);
}
}
}
impl From<Sender<Reply>> for Surveyor {
fn from(tx: Sender<Reply>) -> Surveyor {
Surveyor {
inner: Inner::new(tx),
state: Some(State::Idle)
}
}
}
impl Protocol for Surveyor {
fn id(&self) -> u16 { SURVEYOR }
fn peer_id(&self) -> u16 { RESPONDENT }
fn add_pipe(&mut self, _: &mut Context, eid: EndpointId, pipe: Pipe) {
self.inner.add_pipe(eid, pipe)
}
fn remove_pipe(&mut self, ctx: &mut Context, eid: EndpointId) -> Option<Pipe> {
let was_send_ready = self.is_send_ready();
let was_recv_ready = self.is_recv_ready();
let pipe = self.inner.remove_pipe(eid);
let is_send_ready = self.is_send_ready();
let is_recv_ready = self.is_recv_ready();
if pipe.is_some() {
self.apply(ctx, |s, ctx, inner| s.on_pipe_removed(ctx, inner, eid));
}
ctx.check_send_ready_change(was_send_ready, is_send_ready);
ctx.check_recv_ready_change(was_recv_ready, is_recv_ready);
pipe
}
fn send(&mut self, ctx: &mut Context, msg: Message, timeout: Timeout) {
let raw_msg = self.inner.msg_to_raw_msg(msg);
self.apply(ctx, |s, ctx, inner| s.send(ctx, inner, Rc::new(raw_msg), timeout))
}
fn on_send_ack(&mut self, ctx: &mut Context, eid: EndpointId) {
self.apply(ctx, |s, ctx, inner| s.on_send_ack(ctx, inner, eid))
}
fn on_send_timeout(&mut self, ctx: &mut Context) {
self.apply(ctx, |s, ctx, inner| s.on_send_timeout(ctx, inner))
}
fn on_send_ready(&mut self, ctx: &mut Context, eid: EndpointId) {
self.apply(ctx, |s, ctx, inner| s.on_send_ready(ctx, inner, eid))
}
fn on_send_not_ready(&mut self, ctx: &mut Context, eid: EndpointId) {
self.apply(ctx, |s, ctx, inner| s.on_send_not_ready(ctx, inner, eid))
}
fn recv(&mut self, ctx: &mut Context, timeout: Timeout) {
self.apply(ctx, |s, ctx, inner| s.recv(ctx, inner, timeout))
}
fn on_recv_ack(&mut self, ctx: &mut Context, eid: EndpointId, raw_msg: Message) {
if let Some((msg, survey_id)) = self.inner.raw_msg_to_msg(raw_msg) {
self.apply(ctx, |s, ctx, inner| s.on_recv_ack(ctx, inner, eid, msg, survey_id))
} else {
self.inner.on_recv_ack_malformed(ctx)
}
}
fn on_recv_timeout(&mut self, ctx: &mut Context) {
self.apply(ctx, |s, ctx, inner| s.on_recv_timeout(ctx, inner))
}
fn on_recv_ready(&mut self, ctx: &mut Context, eid: EndpointId) {
self.apply(ctx, |s, ctx, inner| s.on_recv_ready(ctx, inner, eid))
}
fn on_recv_not_ready(&mut self, ctx: &mut Context, eid: EndpointId) {
self.apply(ctx, |s, ctx, inner| s.on_recv_not_ready(ctx, inner, eid))
}
fn set_option(&mut self, opt: ConfigOption) -> io::Result<()> {
match opt {
ConfigOption::SurveyDeadline(ivl) => Ok(self.inner.set_survey_deadline(ivl)),
_ => Err(invalid_input_io_error("option not supported"))
}
}
fn on_timer_tick(&mut self, ctx: &mut Context, task: Schedulable) {
if let Schedulable::SurveyCancel = task {
self.apply(ctx, |s, ctx, inner| s.on_survey_timeout(ctx, inner))
}
}
fn on_device_plugged(&mut self, _: &mut Context) {
self.inner.is_device_item = true;
}
fn is_send_ready(&self) -> bool {
if let Some(ref state) = self.state {
state.is_send_ready(&self.inner)
} else {
false
}
}
fn is_recv_ready(&self) -> bool {
if let Some(ref state) = self.state {
state.is_recv_ready(&self.inner)
} else {
false
}
}
fn close(&mut self, ctx: &mut Context) {
self.inner.close(ctx)
}
}
impl State {
#[cfg(debug_assertions)]
fn name(&self) -> &'static str {
match *self {
State::Idle => "Idle",
State::Active(..) => "Active",
State::Receiving(..) => "Receiving",
State::RecvOnHold(..) => "RecvOnHold"
}
}
fn on_pipe_removed(self, ctx: &mut Context, inner: &mut Inner, eid: EndpointId) -> State {
match self {
State::Receiving(id, p, timeout) => {
if id == eid {
State::Idle.recv(ctx, inner, timeout)
} else {
State::Receiving(id, p, timeout)
}
},
any => any
}
}
fn send(self, ctx: &mut Context, inner: &mut Inner, msg: Rc<Message>, timeout: Timeout) -> State {
if let State::Active(p) = self {
inner.cancel(ctx, p);
}
let pending_survey = inner.send(ctx, msg, timeout);
State::Active(pending_survey)
}
fn on_send_ack(self, _: &mut Context, _: &mut Inner, _: EndpointId) -> State {
self
}
fn on_send_timeout(self, _: &mut Context, _: &mut Inner) -> State {
self
}
fn on_send_ready(self, _: &mut Context, inner: &mut Inner, eid: EndpointId) -> State {
inner.on_send_ready(eid);
self
}
fn on_send_not_ready(self, _: &mut Context, inner: &mut Inner, eid: EndpointId) -> State {
inner.on_send_not_ready(eid);
self
}
fn is_send_ready(&self, inner: &Inner) -> bool {
inner.is_send_ready()
}
fn recv(self, ctx: &mut Context, inner: &mut Inner, timeout: Timeout) -> State {
if inner.is_device_item {
inner.recv(ctx).map_or_else(
| | State::RecvOnHold(None, timeout),
|eid| State::Receiving(eid, None, timeout))
} else if let State::Active(p) = self {
State::Idle.recv_reply_for(ctx, inner, timeout, p)
} else {
inner.recv_when_inactive(ctx, timeout);
State::Idle
}
}
fn recv_reply_for(self, ctx: &mut Context, inner: &mut Inner, timeout: Timeout, p: PendingSurvey) -> State {
if let Some(eid) = inner.recv(ctx) {
State::Receiving(eid, Some(p), timeout)
} else {
State::RecvOnHold(Some(p), timeout)
}
}
fn on_recv_ack(self, ctx: &mut Context, inner: &mut Inner, eid: EndpointId, msg: Message, survey_id: u32) -> State {
match self {
State::Receiving(id, None, timeout) => {
if id == eid {
inner.on_recv_ack(ctx, timeout, msg);
State::Idle
} else {
State::Receiving(id, None, timeout)
}
},
State::Receiving(id, Some(p), timeout) => {
if id == eid {
if p.id == survey_id {
inner.on_recv_ack(ctx, timeout, msg);
State::Active(p)
} else {
State::Idle.recv_reply_for(ctx, inner, timeout, p)
}
} else {
State::Receiving(id, Some(p), timeout)
}
},
any => any
}
}
fn on_recv_timeout(self, _: &mut Context, inner: &mut Inner) -> State {
inner.on_recv_timeout();
match self {
State::Receiving(_, Some(p), _) |
State::RecvOnHold(Some(p), _) => State::Active(p),
_ => State::Idle
}
}
fn on_recv_ready(self, ctx: &mut Context, inner: &mut Inner, eid: EndpointId) -> State {
inner.on_recv_ready(eid);
match self {
State::RecvOnHold(None, timeout) => {
State::Idle.recv(ctx, inner, timeout)
},
State::RecvOnHold(Some(p), timeout) => State::Active(p).recv(ctx, inner, timeout),
any => any
}
}
fn on_recv_not_ready(self, _: &mut Context, inner: &mut Inner, eid: EndpointId) -> State {
inner.on_recv_not_ready(eid);
self
}
fn on_survey_timeout(self, _: &mut Context, _: &mut Inner) -> State {
if let State::Active(_) = self {
State::Idle
} else {
self
}
}
fn is_recv_ready(&self, inner: &Inner) -> bool {
if inner.is_device_item {
inner.is_recv_ready()
} else if let State::Active(..) = *self {
inner.is_recv_ready()
} else {
false
}
}
}
impl Inner {
fn new(tx: Sender<Reply>) -> Inner {
Inner {
reply_tx: tx,
pipes: PipeCollection::new(),
bc: HashSet::new(),
fq: Priolist::new(),
survey_id_seq: time::get_time().nsec as u32,
is_device_item: false,
deadline: Duration::from_secs(1)
}
}
fn add_pipe(&mut self, eid: EndpointId, pipe: Pipe) {
self.fq.insert(eid, pipe.get_recv_priority());
self.pipes.insert(eid, pipe);
}
fn remove_pipe(&mut self, eid: EndpointId) -> Option<Pipe> {
self.bc.remove(&eid);
self.fq.remove(&eid);
self.pipes.remove(&eid)
}
fn send(&mut self, ctx: &mut Context, msg: Rc<Message>, timeout: Timeout) -> PendingSurvey {
broadcast::send_to_all(&mut self.bc, &mut self.pipes, ctx, msg);
let _ = self.reply_tx.send(Reply::Send);
if let Some(sched) = timeout {
ctx.cancel(sched);
}
PendingSurvey {
id: self.cur_survey_id(),
timeout: ctx.schedule(Schedulable::SurveyCancel, self.deadline).ok()
}
}
fn on_send_ready(&mut self, eid: EndpointId) {
self.bc.insert(eid);
}
fn on_send_not_ready(&mut self, eid: EndpointId) {
self.bc.remove(&eid);
}
fn is_send_ready(&self) -> bool {
!self.bc.is_empty()
}
fn recv(&mut self, ctx: &mut Context) -> Option<EndpointId> {
fair_queue::recv(&mut self.fq, &mut self.pipes, ctx)
}
fn recv_when_inactive(&mut self, ctx: &mut Context, timeout: Timeout) {
let error = other_io_error("Can't recv: no active survey");
let _ = self.reply_tx.send(Reply::Err(error));
if let Some(sched) = timeout {
ctx.cancel(sched);
}
}
fn on_recv_ready(&mut self, eid: EndpointId) {
self.fq.activate(&eid)
}
fn on_recv_not_ready(&mut self, eid: EndpointId) {
self.fq.deactivate(&eid)
}
fn is_recv_ready(&self) -> bool {
self.fq.peek()
}
fn on_recv_ack(&self, ctx: &mut Context, timeout: Timeout, msg: Message) {
let _ = self.reply_tx.send(Reply::Recv(msg));
if let Some(sched) = timeout {
ctx.cancel(sched);
}
}
fn on_recv_timeout(&self) {
let error = timedout_io_error("Recv timed out");
let _ = self.reply_tx.send(Reply::Err(error));
}
fn on_recv_ack_malformed(&self, _: &mut Context) {
let error = invalid_data_io_error("Received response without survey id");
let _ = self.reply_tx.send(Reply::Err(error));
}
fn cancel(&self, ctx: &mut Context, mut pending_survey: PendingSurvey) {
if let Some(timeout) = pending_survey.timeout.take() {
ctx.cancel(timeout);
}
}
fn msg_to_raw_msg(&mut self, msg: Message) -> Message {
if self.is_device_item {
msg
} else {
encode(msg, self.next_survey_id())
}
}
fn raw_msg_to_msg(&self, raw_msg: Message) -> Option<(Message, u32)> {
if self.is_device_item {
let cur_survey_id = self.cur_survey_id();
decode(raw_msg).map(|(msg, _)| (msg, cur_survey_id))
} else {
decode(raw_msg).map(|(msg, id)| (msg.without_header(), id))
}
}
fn cur_survey_id(&self) -> u32 {
self.survey_id_seq | 0x80000000
}
fn next_survey_id(&mut self) -> u32 {
self.survey_id_seq += 1;
self.survey_id_seq | 0x80000000
}
fn set_survey_deadline(&mut self, ivl: Duration) {
self.deadline = ivl;
}
fn close(&mut self, ctx: &mut Context) {
self.pipes.close_all(ctx)
}
}
fn encode(msg: Message, survey_id: u32) -> Message {
let mut raw_msg = msg;
let mut survey_id_bytes: [u8; 4] = [0; 4];
BigEndian::write_u32(&mut survey_id_bytes[0..4], survey_id);
raw_msg.header.reserve(4);
raw_msg.header.extend_from_slice(&survey_id_bytes[0..4]);
raw_msg
}
fn decode(raw_msg: Message) -> Option<(Message, u32)> {
if raw_msg.get_body().len() < 4 {
return None;
}
let (mut header, mut payload) = raw_msg.split();
let body = payload.split_off(4);
let survey_id = BigEndian::read_u32(&payload);
if header.is_empty() {
header = payload;
} else {
header.extend_from_slice(&payload);
}
Some((Message::from_header_and_body(header, body), survey_id))
}
#[cfg(test)]
mod tests {
use std::cell::RefCell;
use std::rc::Rc;
use std::sync::mpsc;
use byteorder::*;
use core::{EndpointId, Message, Scheduled};
use core::socket::{Protocol, Reply};
use core::context::{Event};
use core::tests::*;
use super::*;
#[test]
fn when_send_succeed_it_is_notified_and_timeout_is_cancelled() {
let (tx, rx) = mpsc::channel();
let mut surv = Surveyor::from(tx);
let ctx_sensor = Rc::new(RefCell::new(TestContextSensor::default()));
let mut ctx = TestContext::with_sensor(ctx_sensor.clone());
let eid = EndpointId::from(0);
let pipe = new_test_pipe(eid);
surv.add_pipe(&mut ctx, eid, pipe);
surv.on_send_ready(&mut ctx, eid);
let msg = Message::new();
let timeout = Scheduled::from(1);
surv.send(&mut ctx, msg, Some(timeout));
surv.on_send_ack(&mut ctx, eid);
let reply = rx.try_recv().expect("facade should have been sent a reply !");
let is_reply_ok = match reply {
Reply::Send => true,
_ => false
};
assert!(is_reply_ok);
let sensor = ctx_sensor.borrow();
sensor.assert_one_send_to(eid);
sensor.assert_one_cancellation(timeout);
}
#[test]
fn when_send_starts_event_is_raised() {
let (tx, _) = mpsc::channel();
let mut surv = Surveyor::from(tx);
let ctx_sensor = Rc::new(RefCell::new(TestContextSensor::default()));
let mut ctx = TestContext::with_sensor(ctx_sensor.clone());
let eid = EndpointId::from(1);
let pipe = new_test_pipe(eid);
surv.add_pipe(&mut ctx, eid, pipe);
surv.on_send_ready(&mut ctx, eid);
surv.send(&mut ctx, Message::new(), None);
surv.on_send_ack(&mut ctx, eid);
surv.on_send_ready(&mut ctx, eid);
let sensor = ctx_sensor.borrow();
let raised_evts = sensor.get_raised_events();
assert_eq!(3, raised_evts.len());
assert_eq!(Event::CanSend(true), raised_evts[0]);
assert_eq!(Event::CanSend(false), raised_evts[1]);
assert_eq!(Event::CanSend(true), raised_evts[2]);
}
#[test]
fn when_last_send_ready_pipe_is_removed_event_is_raised() {
let (tx, _) = mpsc::channel();
let mut surv = Surveyor::from(tx);
let ctx_sensor = Rc::new(RefCell::new(TestContextSensor::default()));
let mut ctx = TestContext::with_sensor(ctx_sensor.clone());
let eid = EndpointId::from(2);
let pipe = new_test_pipe(eid);
surv.add_pipe(&mut ctx, eid, pipe);
surv.on_send_ready(&mut ctx, eid);
surv.remove_pipe(&mut ctx, eid);
let sensor = ctx_sensor.borrow();
let raised_evts = sensor.get_raised_events();
assert_eq!(2, raised_evts.len());
assert_eq!(Event::CanSend(true), raised_evts[0]);
assert_eq!(Event::CanSend(false), raised_evts[1]);
}
#[test]
fn when_in_regular_mode_send_will_append_survey_id_to_the_header() {
let (tx, _) = mpsc::channel();
let mut surv = Surveyor::from(tx);
let ctx_sensor = Rc::new(RefCell::new(TestContextSensor::default()));
let mut ctx = TestContext::with_sensor(ctx_sensor.clone());
let eid = EndpointId::from(4);
let pipe = new_test_pipe(eid);
let app_msg = Message::from_body(vec![1u8, 2, 3]);
surv.add_pipe(&mut ctx, eid, pipe);
surv.on_send_ready(&mut ctx, eid);
surv.send(&mut ctx, app_msg, None);
let sensor = ctx_sensor.borrow();
let send_calls = sensor.get_send_calls();
assert_eq!(1, send_calls.len());
let &(_, ref proto_msg) = &send_calls[0];
let header = proto_msg.get_header();
let body = proto_msg.get_body();
assert_eq!(4, header.len());
assert_eq!(3, body.len());
let req_id = BigEndian::read_u32(header);
let control = req_id & 0x80000000;
assert_eq!(0x80000000, control);
}
#[test]
fn when_in_raw_mode_send_will_not_append_anything_to_the_header() {
let (tx, _) = mpsc::channel();
let mut surv = Surveyor::from(tx);
let ctx_sensor = Rc::new(RefCell::new(TestContextSensor::default()));
let mut ctx = TestContext::with_sensor(ctx_sensor.clone());
let eid = EndpointId::from(5);
let pipe = new_test_pipe(eid);
let app_msg = Message::from_body(vec![1u8, 2, 3]);
surv.on_device_plugged(&mut ctx);
surv.add_pipe(&mut ctx, eid, pipe);
surv.on_send_ready(&mut ctx, eid);
surv.send(&mut ctx, app_msg, None);
let sensor = ctx_sensor.borrow();
let send_calls = sensor.get_send_calls();
assert_eq!(1, send_calls.len());
let &(_, ref proto_msg) = &send_calls[0];
let header = proto_msg.get_header();
let body = proto_msg.get_body();
assert_eq!(0, header.len());
assert_eq!(3, body.len());
}
#[test]
fn when_in_regular_mode_recv_while_idle_will_fail() {
let (tx, rx) = mpsc::channel();
let mut surv = Surveyor::from(tx);
let ctx_sensor = Rc::new(RefCell::new(TestContextSensor::default()));
let mut ctx = TestContext::with_sensor(ctx_sensor.clone());
let eid = EndpointId::from(0);
let pipe = new_test_pipe(eid);
surv.add_pipe(&mut ctx, eid, pipe);
surv.on_recv_ready(&mut ctx, eid);
surv.recv(&mut ctx, None);
let reply = rx.try_recv().expect("facade should have been sent a reply !");
let is_reply_err = match reply {
Reply::Err(_) => true,
_ => false
};
assert!(is_reply_err);
}
#[test]
fn when_in_regular_mode_recv_while_active_will_drop_msg_with_wrong_request_id() {
let (tx, rx) = mpsc::channel();
let mut surv = Surveyor::from(tx);
let ctx_sensor = Rc::new(RefCell::new(TestContextSensor::default()));
let mut ctx = TestContext::with_sensor(ctx_sensor.clone());
let eid = EndpointId::from(1);
let pipe = new_test_pipe(eid);
surv.add_pipe(&mut ctx, eid, pipe);
surv.on_send_ready(&mut ctx, eid);
surv.send(&mut ctx, Message::new(), None);
surv.on_send_ack(&mut ctx, eid);
let _ = rx.try_recv().expect("facade should have been sent a reply !");
let bad_survey_id = (surv.inner.survey_id_seq - 1) | 0x80000000;
let mut body: Vec<u8> = vec![0, 0, 0, 0, 4, 2, 1];
BigEndian::write_u32(&mut body[0..4], bad_survey_id);
let msg = Message::from_body(body);
surv.on_recv_ready(&mut ctx, eid);
surv.recv(&mut ctx, None);
surv.on_recv_ack(&mut ctx, eid, msg);
assert!(rx.try_recv().is_err());
}
#[test]
fn when_in_regular_mode_recv_while_active_will_accept_msg_with_right_request_id() {
let (tx, rx) = mpsc::channel();
let mut surv = Surveyor::from(tx);
let ctx_sensor = Rc::new(RefCell::new(TestContextSensor::default()));
let mut ctx = TestContext::with_sensor(ctx_sensor.clone());
let eid = EndpointId::from(0);
let pipe = new_test_pipe(eid);
surv.add_pipe(&mut ctx, eid, pipe);
surv.on_send_ready(&mut ctx, eid);
surv.send(&mut ctx, Message::new(), None);
surv.on_send_ack(&mut ctx, eid);
let _ = rx.try_recv().expect("facade should have been sent a reply !");
let good_survey_id = (surv.inner.survey_id_seq) | 0x80000000;
let mut body: Vec<u8> = vec![0, 0, 0, 0, 4, 2, 1];
BigEndian::write_u32(&mut body[0..4], good_survey_id);
let msg = Message::from_body(body);
surv.on_recv_ready(&mut ctx, eid);
surv.recv(&mut ctx, None);
surv.on_recv_ack(&mut ctx, eid, msg);
let reply = rx.try_recv().expect("facade should have been sent a reply !");
let is_reply_ok = match reply {
Reply::Recv(_) => true,
_ => false
};
assert!(is_reply_ok);
}
#[test]
fn when_in_regular_mode_recv_removes_the_survey_id_from_the_body() {
let (tx, rx) = mpsc::channel();
let mut surv = Surveyor::from(tx);
let ctx_sensor = Rc::new(RefCell::new(TestContextSensor::default()));
let mut ctx = TestContext::with_sensor(ctx_sensor.clone());
let eid = EndpointId::from(0);
let pipe = new_test_pipe(eid);
surv.add_pipe(&mut ctx, eid, pipe);
surv.on_send_ready(&mut ctx, eid);
surv.send(&mut ctx, Message::new(), None);
surv.on_send_ack(&mut ctx, eid);
let _ = rx.try_recv().expect("facade should have been sent a reply !");
let good_survey_id = (surv.inner.survey_id_seq) | 0x80000000;
let mut body: Vec<u8> = vec![0, 0, 0, 0, 4, 2, 1];
BigEndian::write_u32(&mut body[0..4], good_survey_id);
let msg = Message::from_body(body);
surv.on_recv_ready(&mut ctx, eid);
surv.recv(&mut ctx, None);
surv.on_recv_ack(&mut ctx, eid, msg);
let reply = rx.try_recv().expect("facade should have been sent a reply !");
let reply_msg = match reply {
Reply::Recv(msg) => Some(msg),
_ => None
};
let app_msg = reply_msg.unwrap();
assert_eq!(0, app_msg.get_header().len());
assert_eq!(3, app_msg.get_body().len());
}
#[test]
fn when_in_raw_mode_recv_moves_the_survey_id_from_the_body_to_the_header() {
let (tx, rx) = mpsc::channel();
let mut surv = Surveyor::from(tx);
let ctx_sensor = Rc::new(RefCell::new(TestContextSensor::default()));
let mut ctx = TestContext::with_sensor(ctx_sensor.clone());
let eid = EndpointId::from(0);
let pipe = new_test_pipe(eid);
let any_survey_id = 666 | 0x80000000;
let mut body: Vec<u8> = vec![0, 0, 0, 0, 4, 2, 1];
BigEndian::write_u32(&mut body[0..4], any_survey_id);
let msg = Message::from_body(body);
surv.on_device_plugged(&mut ctx);
surv.add_pipe(&mut ctx, eid, pipe);
surv.on_recv_ready(&mut ctx, eid);
surv.recv(&mut ctx, None);
surv.on_recv_ack(&mut ctx, eid, msg);
let reply = rx.try_recv().expect("facade should have been sent a reply !");
let reply_msg = match reply {
Reply::Recv(msg) => Some(msg),
_ => None
};
let app_msg = reply_msg.expect("facade should have been sent a Recv reply !");
assert_eq!(4, app_msg.get_header().len());
assert_eq!(3, app_msg.get_body().len());
}
}