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extern crate component_future;
mod run;
#[test]
fn test_basic_future() {
struct TwoFutures {
fut1: Option<
Box<
dyn futures::future::Future<Item = u32, Error = String>
+ Send,
>,
>,
fut2: Option<
Box<
dyn futures::future::Future<Item = u32, Error = String>
+ Send,
>,
>,
val: u32,
}
impl TwoFutures {
fn new<F1, F2>(fut1: F1, fut2: F2) -> Self
where
F1: futures::future::Future<Item = u32, Error = String>
+ Send
+ 'static,
F2: futures::future::Future<Item = u32, Error = String>
+ Send
+ 'static,
{
Self {
fut1: Some(Box::new(fut1)),
fut2: Some(Box::new(fut2)),
val: 1,
}
}
}
#[allow(clippy::type_complexity)]
impl TwoFutures {
const POLL_FNS:
&'static [&'static dyn for<'a> Fn(
&'a mut Self,
)
-> component_future::Poll<
u32,
String,
>] = &[
&Self::poll_future_1,
&Self::poll_future_2,
&Self::poll_return,
];
fn poll_future_1(&mut self) -> component_future::Poll<u32, String> {
if let Some(fut1) = &mut self.fut1 {
let val = component_future::try_ready!(fut1.poll());
self.val += val;
self.fut1.take();
Ok(component_future::Async::DidWork)
} else {
Ok(component_future::Async::NothingToDo)
}
}
fn poll_future_2(&mut self) -> component_future::Poll<u32, String> {
if self.fut1.is_some() {
return Ok(component_future::Async::NothingToDo);
}
if let Some(fut2) = &mut self.fut2 {
let val = component_future::try_ready!(fut2.poll());
self.val *= val;
self.fut2.take();
Ok(component_future::Async::DidWork)
} else {
Ok(component_future::Async::NothingToDo)
}
}
fn poll_return(&mut self) -> component_future::Poll<u32, String> {
if self.fut1.is_some() || self.fut2.is_some() {
return Ok(component_future::Async::NothingToDo);
}
Ok(component_future::Async::Ready(self.val))
}
}
impl futures::future::Future for TwoFutures {
type Item = u32;
type Error = String;
fn poll(&mut self) -> futures::Poll<Self::Item, Self::Error> {
component_future::poll_future(self, Self::POLL_FNS)
}
}
let cfut =
TwoFutures::new(futures::future::ok(3), futures::future::ok(5));
let i = run::future(cfut);
assert_eq!(i, Ok(20));
}
#[test]
fn test_basic_stream() {
struct TwoFutures {
fut1: Option<
Box<
dyn futures::future::Future<Item = u32, Error = String>
+ Send,
>,
>,
fut2: Option<
Box<
dyn futures::future::Future<Item = u32, Error = String>
+ Send,
>,
>,
}
impl TwoFutures {
fn new<F1, F2>(fut1: F1, fut2: F2) -> Self
where
F1: futures::future::Future<Item = u32, Error = String>
+ Send
+ 'static,
F2: futures::future::Future<Item = u32, Error = String>
+ Send
+ 'static,
{
Self {
fut1: Some(Box::new(fut1)),
fut2: Some(Box::new(fut2)),
}
}
}
impl TwoFutures {
#[allow(clippy::type_complexity)]
const POLL_FNS:
&'static [&'static dyn for<'a> Fn(
&'a mut Self,
)
-> component_future::Poll<
Option<u32>,
String,
>] = &[
&Self::poll_future_1,
&Self::poll_future_2,
&Self::poll_return,
];
fn poll_future_1(
&mut self,
) -> component_future::Poll<Option<u32>, String> {
if let Some(fut1) = &mut self.fut1 {
let val = component_future::try_ready!(fut1.poll());
self.fut1.take();
Ok(component_future::Async::Ready(Some(val)))
} else {
Ok(component_future::Async::NothingToDo)
}
}
fn poll_future_2(
&mut self,
) -> component_future::Poll<Option<u32>, String> {
if self.fut1.is_some() {
return Ok(component_future::Async::NothingToDo);
}
if let Some(fut2) = &mut self.fut2 {
let val = component_future::try_ready!(fut2.poll());
self.fut2.take();
Ok(component_future::Async::Ready(Some(val)))
} else {
Ok(component_future::Async::NothingToDo)
}
}
fn poll_return(
&mut self,
) -> component_future::Poll<Option<u32>, String> {
if self.fut1.is_some() || self.fut2.is_some() {
return Ok(component_future::Async::NothingToDo);
}
Ok(component_future::Async::Ready(None))
}
}
impl futures::stream::Stream for TwoFutures {
type Item = u32;
type Error = String;
fn poll(&mut self) -> futures::Poll<Option<Self::Item>, Self::Error> {
component_future::poll_stream(self, Self::POLL_FNS)
}
}
let cstream =
TwoFutures::new(futures::future::ok(3), futures::future::ok(5));
let is = run::stream(cstream);
assert_eq!(is, Ok(vec![3, 5]));
}
|
