Struct MockClock 

pub struct MockClock { /* private fields */ }

A deterministic clock backed by manually-advanced inner state.

Clone shares the same inner state — the same handle can be installed in a subsystem (Arc<dyn Clock>) and held by the test (Arc<MockClock>) to advance time.

Implementations

impl MockClock

pub fn advance(&self, dur: Duration)

Advance the clock by dur. All wakeups whose deadline is <= self.now() + dur resolve.

pub fn advance_secs(&self, secs: u64)

Advance the clock by secs seconds. Sugar for MockClock::advance.

pub fn advance_to_next_wakeup(&self) -> Option<Duration>

Advance the clock to the deadline of the next pending wakeup, returning the elapsed duration. Returns None when no wakeups are pending.

pub fn next_wakeup_in(&self) -> Option<Duration>

Peek at the duration until the next pending wakeup, without advancing the clock. Returns None when no wakeups are pending.

Trait Implementations

impl Clock for MockClock

fn now(&self) -> Instant

Monotonic timestamp suitable for measuring durations between two reads.

fn delay(&self, dur: Duration) -> BoxedDelay

Future that resolves after dur has elapsed in this clock’s frame.

fn duration_since_epoch(&self) -> Duration

Wall-clock duration since the UNIX epoch. Used for slot math and persistence timestamps; not monotonic. Callers pick a granularity (as_secs, as_millis) at the call site.

impl Clone for MockClock

fn clone(&self) -> MockClock

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MockClock

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

Formats the value using the given formatter.

impl Default for MockClock

fn default() -> MockClock

Returns the “default value” for a type.