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https://github.com/fluencelabs/wasm-bindgen
synced 2025-03-16 10:10:52 +00:00
Add naive spawn_local implementation + tests
This is just a naive implementation. It seems it can be improved using a custom task queue, but that can be in a separate PR.
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@ -377,3 +377,15 @@ fn _future_to_promise(future: Box<Future<Item = JsValue, Error = JsValue>>) -> P
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}
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}
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}
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/// Spawns a future.
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pub fn spawn_local<F>(future: F)
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where
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F: Future<Item = (), Error = ()> + 'static,
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{
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future_to_promise(
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future
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.map(|_| JsValue::undefined())
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.map_err(|_| JsValue::undefined()),
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);
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}
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@ -9,7 +9,7 @@ extern crate wasm_bindgen_test;
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use futures::unsync::oneshot;
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use futures::Future;
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use wasm_bindgen::prelude::*;
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use wasm_bindgen_futures::{future_to_promise, JsFuture};
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use wasm_bindgen_futures::{future_to_promise, spawn_local, JsFuture};
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use wasm_bindgen_test::*;
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#[wasm_bindgen_test(async)]
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@ -68,3 +68,21 @@ fn oneshot_works() -> impl Future<Item = (), Error = JsValue> {
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closure.forget();
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rx.then(|_| Ok(()))
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}
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#[wasm_bindgen_test(async)]
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fn spawn_local_runs() -> impl Future<Item = (), Error = JsValue> {
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let (tx, rx) = oneshot::channel::<u32>();
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let fn_box = Box::new(move || {
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tx.send(42).unwrap();
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});
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spawn_local(futures::future::ok::<(), ()>(()).map(|_| {
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fn_box();
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}));
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rx.then(|val| {
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if val == Ok(42) {
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Ok(())
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} else {
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Err(JsValue::undefined())
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}
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})
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}
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