futures_test::task

Struct RecordSpawner

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pub struct RecordSpawner { /* private fields */ }
Expand description

An implementation of Spawn that records any Futures spawned on it.

§Examples

use futures::task::SpawnExt;
use futures_test::task::RecordSpawner;

let recorder = RecordSpawner::new();
recorder.spawn(async { }).unwrap();
assert_eq!(recorder.spawned().len(), 1);

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impl RecordSpawner

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pub fn new() -> Self

Create a new instance

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pub fn spawned(&self) -> Ref<'_, Vec<FutureObj<'static, ()>>>

Inspect any futures that were spawned onto this Spawn.

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impl Debug for RecordSpawner

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for RecordSpawner

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fn default() -> RecordSpawner

Returns the “default value” for a type. Read more
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impl Spawn for RecordSpawner

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fn spawn_obj(&self, future: FutureObj<'static, ()>) -> Result<(), SpawnError>

Spawns a future that will be run to completion. Read more
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fn status(&self) -> Result<(), SpawnError>

Determines whether the executor is able to spawn new tasks. Read more

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<Sp> SpawnExt for Sp
where Sp: Spawn + ?Sized,

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fn spawn<Fut>(&self, future: Fut) -> Result<(), SpawnError>
where Fut: Future<Output = ()> + Send + 'static,

Spawns a task that polls the given future with output () to completion. Read more
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fn spawn_with_handle<Fut>( &self, future: Fut, ) -> Result<RemoteHandle<<Fut as Future>::Output>, SpawnError>
where Fut: Future + Send + 'static, <Fut as Future>::Output: Send,

Spawns a task that polls the given future to completion and returns a future that resolves to the spawned future’s output. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.