use arc_swap::ArcSwapOption;
use crossbeam_queue::ArrayQueue;
use never::Never;
use std::sync::{
atomic::{AtomicUsize, Ordering as AtomicOrdering},
Arc, RwLock,
};
use tracing::info;
use crate::common::VariantName;
use callbag::{Message, Source};
#[cfg(not(all(target_arch = "wasm32", target_os = "wasi")))]
use {
async_executors::{Timer, TimerExt},
async_nursery::{NurseExt, Nursery},
std::{error::Error, sync::atomic::AtomicBool, time::Duration},
tracing_futures::Instrument,
};
#[cfg(all(target_arch = "wasm32", not(target_os = "wasi")))]
use wasm_bindgen_test::wasm_bindgen_test;
#[cfg(all(
all(target_arch = "wasm32", not(target_os = "wasi")),
feature = "browser",
))]
use wasm_bindgen_test::wasm_bindgen_test_configure;
pub mod common;
#[cfg(all(
all(target_arch = "wasm32", not(target_os = "wasi")),
feature = "browser",
))]
wasm_bindgen_test_configure!(run_in_browser);
#[cfg(not(all(target_arch = "wasm32", target_os = "wasi")))]
#[tracing::instrument]
#[test_log::test(async_std::test)]
#[cfg_attr(
all(
all(target_arch = "wasm32", not(target_os = "wasi")),
feature = "browser",
),
wasm_bindgen_test
)]
async fn it_concats_1_async_finite_listenable_source() {
let (nursery, nursery_out) = Nursery::new(async_executors::AsyncStd);
let nursery = nursery.in_current_span();
let downwards_expected_types = ["Handshake", "Data", "Data", "Data", "Terminate"];
let downwards_expected_types = {
let q = ArrayQueue::new(downwards_expected_types.len());
for v in downwards_expected_types {
q.push(v).ok();
}
Arc::new(q)
};
let downwards_expected = [1, 2, 3];
let downwards_expected = {
let q = ArrayQueue::new(downwards_expected.len());
for v in downwards_expected {
q.push(v).ok();
}
Arc::new(q)
};
let source_a = {
let source_a_ref: Arc<RwLock<Option<Arc<Source<_>>>>> = Arc::new(RwLock::new(None));
let source_a = Arc::new(
{
let nursery = nursery.clone();
let source_a_ref = Arc::clone(&source_a_ref);
move |message| {
info!("up (a): {message:?}");
if let Message::Handshake(sink) = message {
let i = Arc::new(AtomicUsize::new(0));
nursery
.nurse({
let nursery = nursery.clone();
let sink = Arc::clone(&sink);
const DURATION: Duration = Duration::from_millis(100);
async move {
loop {
nursery.sleep(DURATION).await;
let i = i.fetch_add(1, AtomicOrdering::AcqRel) + 1;
sink(Message::Data(i));
if i == 3 {
sink(Message::Terminate);
break;
}
}
}
})
.unwrap();
let source_a = {
let source_a_ref = &mut *source_a_ref.write().unwrap();
source_a_ref.take().unwrap()
};
sink(Message::Handshake(source_a));
}
}
}
.into(),
);
{
let mut source_a_ref = source_a_ref.write().unwrap();
*source_a_ref = Some(Arc::clone(&source_a));
}
source_a
};
let sink = Arc::new(
(move |message: Message<_, Never>| {
info!("down: {message:?}");
{
let et = downwards_expected_types.pop().unwrap();
assert_eq!(
message.variant_name(),
et,
"downwards type is expected: {et}"
);
}
if let Message::Data(data) = message {
let e = downwards_expected.pop().unwrap();
assert_eq!(data, e, "downwards data is expected: {e}");
}
})
.into(),
);
let source = callbag::concat!(source_a);
source(Message::Handshake(sink));
let nursery_out = nursery.timeout(Duration::from_millis(700), nursery_out);
drop(nursery);
nursery_out.await.ok();
}
#[cfg(not(all(target_arch = "wasm32", target_os = "wasi")))]
#[tracing::instrument]
#[test_log::test(async_std::test)]
#[cfg_attr(
all(
all(target_arch = "wasm32", not(target_os = "wasi")),
feature = "browser",
),
wasm_bindgen_test
)]
async fn it_concats_2_async_finite_listenable_sources() {
let (nursery, nursery_out) = Nursery::new(async_executors::AsyncStd);
let nursery = nursery.in_current_span();
let downwards_expected_types = [
"Handshake",
"Data",
"Data",
"Data",
"Data",
"Data",
"Terminate",
];
let downwards_expected_types = {
let q = ArrayQueue::new(downwards_expected_types.len());
for v in downwards_expected_types {
q.push(v).ok();
}
Arc::new(q)
};
let downwards_expected = ["1", "2", "3", "a", "b"];
let downwards_expected = {
let q = ArrayQueue::new(downwards_expected.len());
for v in downwards_expected {
q.push(v).ok();
}
Arc::new(q)
};
let source_a = {
let source_a_ref: Arc<RwLock<Option<Arc<Source<_>>>>> = Arc::new(RwLock::new(None));
let source_a = Arc::new(
{
let nursery = nursery.clone();
let source_a_ref = Arc::clone(&source_a_ref);
move |message| {
info!("up (a): {message:?}");
if let Message::Handshake(sink) = message {
let i = Arc::new(AtomicUsize::new(0));
nursery
.nurse({
let nursery = nursery.clone();
let sink = Arc::clone(&sink);
const DURATION: Duration = Duration::from_millis(100);
async move {
loop {
nursery.sleep(DURATION).await;
let i = i.fetch_add(1, AtomicOrdering::AcqRel) + 1;
sink(Message::Data(format!("{}", i)));
if i == 3 {
sink(Message::Terminate);
break;
}
}
}
})
.unwrap();
let source_a = {
let source_a_ref = &mut *source_a_ref.write().unwrap();
source_a_ref.take().unwrap()
};
sink(Message::Handshake(source_a));
}
}
}
.into(),
);
{
let mut source_a_ref = source_a_ref.write().unwrap();
*source_a_ref = Some(Arc::clone(&source_a));
}
source_a
};
let source_b = {
let source_b_ref: Arc<RwLock<Option<Arc<Source<_>>>>> = Arc::new(RwLock::new(None));
let source_b = Arc::new(
{
let nursery = nursery.clone();
let source_b_ref = Arc::clone(&source_b_ref);
move |message: Message<Never, String>| {
info!("up (b): {message:?}");
if let Message::Handshake(sink) = message {
nursery
.nurse({
let nursery = nursery.clone();
let sink = Arc::clone(&sink);
const DURATION: Duration = Duration::from_millis(230);
async move {
nursery.sleep(DURATION).await;
sink(Message::Data("a".to_owned()));
}
})
.unwrap();
nursery
.nurse({
let nursery = nursery.clone();
let sink = Arc::clone(&sink);
const DURATION: Duration = Duration::from_millis(460);
async move {
nursery.sleep(DURATION).await;
sink(Message::Data("b".to_owned()));
}
})
.unwrap();
nursery
.nurse({
let nursery = nursery.clone();
let sink = Arc::clone(&sink);
const DURATION: Duration = Duration::from_millis(550);
async move {
nursery.sleep(DURATION).await;
sink(Message::Terminate);
}
})
.unwrap();
let source_b = {
let source_b_ref = &mut *source_b_ref.write().unwrap();
source_b_ref.take().unwrap()
};
sink(Message::Handshake(source_b));
}
}
}
.into(),
);
{
let mut source_b_ref = source_b_ref.write().unwrap();
*source_b_ref = Some(Arc::clone(&source_b));
}
source_b
};
let sink = Arc::new(
(move |message: Message<_, Never>| {
info!("down: {message:?}");
{
let et = downwards_expected_types.pop().unwrap();
assert_eq!(
message.variant_name(),
et,
"downwards type is expected: {et}"
);
}
if let Message::Data(data) = message {
let e = downwards_expected.pop().unwrap();
assert_eq!(data, e, "downwards data is expected: {e}");
}
})
.into(),
);
let source = callbag::concat!(source_a, source_b);
source(Message::Handshake(sink));
let nursery_out = nursery.timeout(Duration::from_millis(1_200), nursery_out);
drop(nursery);
nursery_out.await.ok();
}
#[tracing::instrument]
#[test_log::test]
#[cfg_attr(
all(target_arch = "wasm32", not(target_os = "wasi")),
wasm_bindgen_test
)]
fn it_concats_2_sync_finite_pullable_sources() {
let upwards_expected_a = ["Pull", "Pull", "Pull", "Pull"];
let upwards_expected_a = {
let q = ArrayQueue::new(upwards_expected_a.len());
for v in upwards_expected_a {
q.push(v).ok();
}
Arc::new(q)
};
let upwards_expected_b = ["Pull", "Pull", "Pull"];
let upwards_expected_b = {
let q = ArrayQueue::new(upwards_expected_b.len());
for v in upwards_expected_b {
q.push(v).ok();
}
Arc::new(q)
};
let downwards_expected_types = [
"Handshake",
"Data",
"Data",
"Data",
"Data",
"Data",
"Terminate",
];
let downwards_expected_types = {
let q = ArrayQueue::new(downwards_expected_types.len());
for v in downwards_expected_types {
q.push(v).ok();
}
Arc::new(q)
};
let downwards_expected = ["10", "20", "30", "a", "b"];
let downwards_expected = {
let q = ArrayQueue::new(downwards_expected.len());
for v in downwards_expected {
q.push(v).ok();
}
Arc::new(q)
};
let source_a = {
let sent_a = Arc::new(AtomicUsize::new(0));
let sink_a = Arc::new(ArcSwapOption::from(None));
let source_a_ref: Arc<RwLock<Option<Arc<Source<_>>>>> = Arc::new(RwLock::new(None));
let source_a = Arc::new(
{
let source_a_ref = Arc::clone(&source_a_ref);
move |message| {
info!("up (a): {message:?}");
if let Message::Handshake(sink) = message {
sink_a.store(Some(sink));
let source_a = {
let source_a_ref = &mut *source_a_ref.write().unwrap();
source_a_ref.take().unwrap()
};
let sink_a = sink_a.load();
let sink_a = sink_a.as_ref().unwrap();
sink_a(Message::Handshake(source_a));
return;
}
if sent_a.load(AtomicOrdering::Acquire) == 3 {
let sink_a = sink_a.load();
let sink_a = sink_a.as_ref().unwrap();
sink_a(Message::Terminate);
}
assert!(!upwards_expected_a.is_empty(), "source can be pulled");
{
let e = upwards_expected_a.pop().unwrap();
assert_eq!(message.variant_name(), e, "upwards A type is expected: {e}");
}
if sent_a.load(AtomicOrdering::Acquire) == 0 {
sent_a.fetch_add(1, AtomicOrdering::AcqRel);
let sink_a = sink_a.load();
let sink_a = sink_a.as_ref().unwrap();
sink_a(Message::Data("10"));
return;
}
if sent_a.load(AtomicOrdering::Acquire) == 1 {
sent_a.fetch_add(1, AtomicOrdering::AcqRel);
let sink_a = sink_a.load();
let sink_a = sink_a.as_ref().unwrap();
sink_a(Message::Data("20"));
return;
}
if sent_a.load(AtomicOrdering::Acquire) == 2 {
sent_a.fetch_add(1, AtomicOrdering::AcqRel);
let sink_a = sink_a.load();
let sink_a = sink_a.as_ref().unwrap();
sink_a(Message::Data("30"));
}
}
}
.into(),
);
{
let mut source_a_ref = source_a_ref.write().unwrap();
*source_a_ref = Some(Arc::clone(&source_a));
}
source_a
};
let source_b = {
let sent_b = Arc::new(AtomicUsize::new(0));
let sink_b = Arc::new(ArcSwapOption::from(None));
let source_b_ref: Arc<RwLock<Option<Arc<Source<_>>>>> = Arc::new(RwLock::new(None));
let source_b = Arc::new(
{
let source_b_ref = Arc::clone(&source_b_ref);
move |message| {
info!("up (b): {message:?}");
if let Message::Handshake(sink) = message {
sink_b.store(Some(sink));
let source_b = {
let source_b_ref = &mut *source_b_ref.write().unwrap();
source_b_ref.take().unwrap()
};
let sink_b = sink_b.load();
let sink_b = sink_b.as_ref().unwrap();
sink_b(Message::Handshake(source_b));
return;
}
if sent_b.load(AtomicOrdering::Acquire) == 2 {
let sink_b = sink_b.load();
let sink_b = sink_b.as_ref().unwrap();
sink_b(Message::Terminate);
}
assert!(!upwards_expected_b.is_empty(), "source can be pulled");
{
let e = upwards_expected_b.pop().unwrap();
assert_eq!(message.variant_name(), e, "upwards B type is expected: {e}");
}
if sent_b.load(AtomicOrdering::Acquire) == 0 {
sent_b.fetch_add(1, AtomicOrdering::AcqRel);
let sink_b = sink_b.load();
let sink_b = sink_b.as_ref().unwrap();
sink_b(Message::Data("a"));
return;
}
if sent_b.load(AtomicOrdering::Acquire) == 1 {
sent_b.fetch_add(1, AtomicOrdering::AcqRel);
let sink_b = sink_b.load();
let sink_b = sink_b.as_ref().unwrap();
sink_b(Message::Data("b"));
}
}
}
.into(),
);
{
let mut source_b_ref = source_b_ref.write().unwrap();
*source_b_ref = Some(Arc::clone(&source_b));
}
source_b
};
let sink = {
let talkback = ArcSwapOption::from(None);
Arc::new(
(move |message: Message<_, Never>| {
info!("down: {message:?}");
{
let et = downwards_expected_types.pop().unwrap();
assert_eq!(
message.variant_name(),
et,
"downwards type is expected: {et}"
);
}
if let Message::Handshake(source) = message {
talkback.store(Some(source));
let talkback = talkback.load();
let talkback = talkback.as_ref().unwrap();
talkback(Message::Pull);
} else if let Message::Data(data) = message {
{
let e = downwards_expected.pop().unwrap();
assert_eq!(data, e, "downwards data is expected: {e}");
}
let talkback = talkback.load();
let talkback = talkback.as_ref().unwrap();
talkback(Message::Pull);
}
})
.into(),
)
};
let source = callbag::concat!(source_a, source_b);
source(Message::Handshake(sink));
}
#[cfg(not(all(target_arch = "wasm32", target_os = "wasi")))]
#[tracing::instrument]
#[test_log::test(async_std::test)]
#[cfg_attr(
all(
all(target_arch = "wasm32", not(target_os = "wasi")),
feature = "browser",
),
wasm_bindgen_test
)]
async fn it_returns_a_source_that_disposes_upon_upwards_end() {
let (nursery, nursery_out) = Nursery::new(async_executors::AsyncStd);
let nursery = nursery.in_current_span();
let upwards_expected = ["Handshake", "Terminate"];
let upwards_expected = {
let q = ArrayQueue::new(upwards_expected.len());
for v in upwards_expected {
q.push(v).ok();
}
Arc::new(q)
};
let downwards_expected_types = ["Handshake", "Data", "Data", "Data"];
let downwards_expected_types = {
let q = ArrayQueue::new(downwards_expected_types.len());
for v in downwards_expected_types {
q.push(v).ok();
}
Arc::new(q)
};
let downwards_expected = [10, 20, 30];
let downwards_expected = {
let q = ArrayQueue::new(downwards_expected.len());
for v in downwards_expected {
q.push(v).ok();
}
Arc::new(q)
};
let make_source = {
let nursery = nursery.clone();
move || {
let sent = Arc::new(AtomicUsize::new(0));
let interval_cleared = Arc::new(AtomicBool::new(false));
let source_ref: Arc<RwLock<Option<Arc<Source<_>>>>> = Arc::new(RwLock::new(None));
let source = Arc::new(
{
let source_ref = Arc::clone(&source_ref);
move |message: Message<Never, _>| {
info!("up: {message:?}");
let interval_cleared = Arc::clone(&interval_cleared);
{
let e = upwards_expected.pop().unwrap();
assert_eq!(message.variant_name(), e, "upwards type is expected: {e}");
}
if let Message::Handshake(sink) = message {
nursery
.nurse({
let nursery = nursery.clone();
let sent = Arc::clone(&sent);
let sink = Arc::clone(&sink);
const DURATION: Duration = Duration::from_millis(100);
async move {
loop {
nursery.sleep(DURATION).await;
if interval_cleared.load(AtomicOrdering::Acquire) {
break;
}
let sent =
sent.fetch_add(1, AtomicOrdering::AcqRel) + 1;
sink(Message::Data(sent * 10));
}
}
})
.unwrap();
let source = {
let source_ref = &mut *source_ref.write().unwrap();
source_ref.take().unwrap()
};
sink(Message::Handshake(source));
} else if let Message::Error(_) | Message::Terminate = message {
interval_cleared.store(true, AtomicOrdering::Release);
}
}
}
.into(),
);
{
let mut source_ref = source_ref.write().unwrap();
*source_ref = Some(Arc::clone(&source));
}
source
}
};
let make_sink = move || {
let talkback = ArcSwapOption::from(None);
Arc::new(
(move |message: Message<_, Never>| {
info!("down: {message:?}");
{
let et = downwards_expected_types.pop().unwrap();
assert_eq!(
message.variant_name(),
et,
"downwards type is expected: {et}"
);
}
if let Message::Handshake(source) = message {
talkback.store(Some(source));
} else if let Message::Data(data) = message {
let e = downwards_expected.pop().unwrap();
assert_eq!(data, e, "downwards data is expected: {e:?}");
}
if downwards_expected.is_empty() {
let talkback = talkback.load();
let talkback = talkback.as_ref().unwrap();
talkback(Message::Terminate);
}
})
.into(),
)
};
let source = callbag::concat!(make_source());
let sink = make_sink();
source(Message::Handshake(sink));
let nursery_out = nursery.timeout(Duration::from_millis(700), nursery_out);
drop(nursery);
nursery_out.await.ok();
}
#[cfg(not(all(target_arch = "wasm32", target_os = "wasi")))]
#[tracing::instrument]
#[test_log::test(async_std::test)]
#[cfg_attr(
all(
all(target_arch = "wasm32", not(target_os = "wasi")),
feature = "browser",
),
wasm_bindgen_test
)]
async fn it_propagates_source_error_to_sink_and_doesnt_subscribe_to_next_source() {
let (nursery, nursery_out) = Nursery::new(async_executors::AsyncStd);
let nursery = nursery.in_current_span();
let downwards_expected = ["Handshake", "Data", "Data", "Error"];
let downwards_expected = {
let q = ArrayQueue::new(downwards_expected.len());
for v in downwards_expected {
q.push(v).ok();
}
Arc::new(q)
};
let make_source = {
let nursery = nursery.clone();
move || {
let limit = Arc::new(AtomicUsize::new(2));
let value = Arc::new(AtomicUsize::new(42));
let source_ref: Arc<RwLock<Option<Arc<Source<_>>>>> = Arc::new(RwLock::new(None));
let source = Arc::new(
{
let nursery = nursery.clone();
let source_ref = Arc::clone(&source_ref);
move |message| {
info!("up: {message:?}");
if let Message::Handshake(sink) = message {
nursery
.nurse({
let nursery = nursery.clone();
let limit = Arc::clone(&limit);
let value = Arc::clone(&value);
let sink = Arc::clone(&sink);
const DURATION: Duration = Duration::from_millis(100);
async move {
loop {
nursery.sleep(DURATION).await;
let value = value.fetch_add(1, AtomicOrdering::AcqRel);
sink(Message::Data(value));
let limit =
limit.fetch_sub(1, AtomicOrdering::AcqRel) - 1;
if limit == 0 {
sink(Message::Error({
let err: Box<
dyn Error + Send + Sync + 'static,
> = "err".into();
err.into()
}));
break;
}
}
}
})
.unwrap();
let source = {
let source_ref = &mut *source_ref.write().unwrap();
source_ref.take().unwrap()
};
sink(Message::Handshake(source));
}
}
}
.into(),
);
{
let mut source_ref = source_ref.write().unwrap();
*source_ref = Some(Arc::clone(&source));
}
source
}
};
let make_sink = move || {
Arc::new(
(move |message: Message<_, Never>| {
info!("down: {message:?}");
{
let et = downwards_expected.pop().unwrap();
assert_eq!(
message.variant_name(),
et,
"downwards type is expected: {et}"
);
}
})
.into(),
)
};
let source = callbag::concat!(make_source(), make_source());
let sink = make_sink();
source(Message::Handshake(sink));
let nursery_out = nursery.timeout(Duration::from_millis(700), nursery_out);
drop(nursery);
nursery_out.await.ok();
}