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::{scan, Message, Source};
#[cfg(not(all(target_arch = "wasm32", target_os = "wasi")))]
use {
async_executors::{Timer, TimerExt},
async_nursery::{NurseExt, Nursery},
std::{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);
#[tracing::instrument]
#[test_log::test]
#[cfg_attr(
all(target_arch = "wasm32", not(target_os = "wasi")),
wasm_bindgen_test
)]
fn it_scans_a_pullable_source() {
let upwards_expected = ["Handshake", "Pull", "Pull", "Pull", "Pull"];
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", "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, 3, 6];
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 = move || {
let sink_ref = Arc::new(ArcSwapOption::from(None));
let sent = Arc::new(AtomicUsize::new(0));
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:?}");
assert!(!upwards_expected.is_empty(), "source can be pulled");
{
let e = upwards_expected.pop().unwrap();
assert_eq!(message.variant_name(), e, "upwards type is expected: {e}");
}
if let Message::Handshake(sink) = message {
sink_ref.store(Some(sink));
let sink_ref = sink_ref.load();
let sink_ref = sink_ref.as_ref().unwrap();
let source = {
let source_ref = &mut *source_ref.write().unwrap();
source_ref.take().unwrap()
};
sink_ref(Message::Handshake(source));
return;
}
if sent.load(AtomicOrdering::Acquire) == 3 {
let sink_ref = sink_ref.load();
let sink_ref = sink_ref.as_ref().unwrap();
sink_ref(Message::Terminate);
return;
}
if sent.load(AtomicOrdering::Acquire) == 0 {
sent.fetch_add(1, AtomicOrdering::AcqRel);
let sink_ref = sink_ref.load();
let sink_ref = sink_ref.as_ref().unwrap();
sink_ref(Message::Data(1));
return;
}
if sent.load(AtomicOrdering::Acquire) == 1 {
sent.fetch_add(1, AtomicOrdering::AcqRel);
let sink_ref = sink_ref.load();
let sink_ref = sink_ref.as_ref().unwrap();
sink_ref(Message::Data(2));
return;
}
if sent.load(AtomicOrdering::Acquire) == 2 {
sent.fetch_add(1, AtomicOrdering::AcqRel);
let sink_ref = sink_ref.load();
let sink_ref = sink_ref.as_ref().unwrap();
sink_ref(Message::Data(3));
}
}
}
.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));
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 = make_source();
let scanned = scan(move |prev, x| prev + x, 0)(source);
let sink = make_sink();
scanned(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_scans_an_async_finite_listenable_source() {
let (nursery, nursery_out) = Nursery::new(async_executors::AsyncStd);
let nursery = nursery.in_current_span();
let upwards_expected = ["Handshake"];
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", "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, 3, 6];
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 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 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 sent.load(AtomicOrdering::Acquire) == 0 {
sent.fetch_add(1, AtomicOrdering::AcqRel);
sink(Message::Data(1));
continue;
}
if sent.load(AtomicOrdering::Acquire) == 1 {
sent.fetch_add(1, AtomicOrdering::AcqRel);
sink(Message::Data(2));
continue;
}
if sent.load(AtomicOrdering::Acquire) == 2 {
sent.fetch_add(1, AtomicOrdering::AcqRel);
sink(Message::Data(3));
continue;
}
if sent.load(AtomicOrdering::Acquire) == 3 {
sink(Message::Terminate);
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 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 = make_source();
let scanned = scan(move |acc, x| acc + x, 0)(source);
scanned(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_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 = [1, 3, 6];
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));
}
}
})
.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 = make_source();
let scanned = scan(move |acc, x| acc + x, 0)(source);
let sink = make_sink();
scanned(Message::Handshake(sink));
let nursery_out = nursery.timeout(Duration::from_millis(700), nursery_out);
drop(nursery);
nursery_out.await.ok();
}