Struct CollectingObserver 

pub struct CollectingObserver { /* private fields */ }

An observer that collects all events in order.

Stores every EngineEvent it receives in a Mutex<Vec<_>>, making the full event history available for post-hoc assertions. This is the primary observer used in integration tests and is also useful for debugging production pipelines (attach it alongside a logging observer).

Example usage

• progress_events_match_tile_count and related tests create a CollectingObserver, run a pyramid build, then inspect the captured events.
• CLI source wraps a CollectingObserver for its --verbose mode.

Implementations

impl CollectingObserver

pub fn new() -> Self

Create a new, empty CollectingObserver.

pub fn events(&self) -> Vec<EngineEvent>

Return a snapshot of all collected events so far, cloned from the internal mutex-protected buffer.

pub fn event_count(&self) -> usize

Return the number of events collected so far.

Trait Implementations

impl Debug for CollectingObserver

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

Formats the value using the given formatter.

impl Default for CollectingObserver

fn default() -> Self

Returns the “default value” for a type.

impl EngineObserver for CollectingObserver

fn on_event(&self, event: EngineEvent)