Module futures_test::task

Task related testing utilities.

This module provides utilities for creating test LocalWakers and Spawn implementations.

Test wakers:

• [noop_local_waker] creates a waker that ignores calls to wake.
• [panic_local_waker] creates a waker that panics when wake is called.
• [WakeCounter::local_waker] creates a waker that increments a counter whenever wake is called.

Test spawners:

• [NoopSpawner] ignores calls to spawn
• [PanicSpawner] panics if spawn is called.
• [RecordSpawner] records the spawned futures.

For convenience there additionally exist various functions that directly return waker/spawner references: [noop_local_waker_ref], [panic_local_waker_ref], [noop_spawner_mut] and [panic_spawner_mut].

Structs

NoopSpawner	An implementation of Spawn that discards spawned futures when used.
NoopWake	An implementation of Wake that does nothing when woken.
PanicSpawner	An implementation of Spawn that panics when used.
PanicWake	An implementation of Wake that panics when woken.
RecordSpawner	An implementation of Spawn that records any Futures spawned on it.
WakeCounter	An implementation of Wake that tracks how many times it has been woken.

Functions

noop_local_waker	Create a new LocalWaker referencing a singleton instance of NoopWake.
noop_local_waker_ref	Get a thread local reference to a LocalWaker referencing a singleton instance of NoopWake.
noop_spawner_mut	Get a reference to a singleton instance of NoopSpawner.
panic_local_waker	Create a new LocalWaker referencing a singleton instance of PanicWake.
panic_local_waker_ref	Get a thread local reference to a LocalWaker referencing a singleton instance of PanicWake.
panic_spawner_mut	Get a reference to a singleton instance of PanicSpawner.