Struct MockLayer 

pub struct MockLayer { /* private fields */ }

Available on crate feature tracing-subscriber only.

A layer which validates the traces it receives.

A MockLayer is constructed with a MockLayerBuilder. For a detailed description and examples, see the documentation for that struct and for the layer module.

Trait Implementations

impl Debug for MockLayer

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

Formats the value using the given formatter.

impl<C> Layer<C> for MockLayer

where C: Subscriber + for<'a> LookupSpan<'a>,

fn on_register_dispatch(&self, _subscriber: &Dispatch)

Performs late initialization when installing this layer as a Subscriber.

fn register_callsite(&self, metadata: &'static Metadata<'static>) -> Interest

Registers a new callsite with this layer, returning whether or not the layer is interested in being notified about the callsite, similarly to Subscriber::register_callsite.

fn on_record(&self, _: &Id, _: &Record<'_>, _: Context<'_, C>)

Notifies this layer that a span with the given Id recorded the given values.

fn on_event(&self, event: &Event<'_>, cx: Context<'_, C>)

Notifies this layer that an event has occurred.

fn on_follows_from(&self, _span: &Id, _follows: &Id, _: Context<'_, C>)

Notifies this layer that a span with the ID span recorded that it follows from the span with the ID follows.

fn on_new_span(&self, span: &Attributes<'_>, id: &Id, cx: Context<'_, C>)

Notifies this layer that a new span was constructed with the given Attributes and Id.

fn on_enter(&self, id: &Id, cx: Context<'_, C>)

Notifies this layer that a span with the given ID was entered.

fn on_exit(&self, id: &Id, cx: Context<'_, C>)

Notifies this layer that the span with the given ID was exited.

fn on_close(&self, id: Id, cx: Context<'_, C>)

Notifies this layer that the span with the given ID has been closed.

fn on_id_change(&self, _old: &Id, _new: &Id, _ctx: Context<'_, C>)

Notifies this layer that a span ID has been cloned, and that the subscriber returned a different ID.

fn on_layer(&mut self, subscriber: &mut S)

Performs late initialization when attaching a Layer to a Subscriber.

fn enabled(&self, metadata: &Metadata<'_>, ctx: Context<'_, S>) -> bool

Returns true if this layer is interested in a span or event with the given metadata in the current Context, similarly to Subscriber::enabled.

fn event_enabled(&self, _event: &Event<'_>, _ctx: Context<'_, S>) -> bool

Called before on_event, to determine if on_event should be called.

fn and_then<L>(self, layer: L) -> Layered<L, Self, S>

where L: Layer<S>, Self: Sized,

Composes this layer around the given Layer, returning a Layered struct implementing Layer.

fn with_subscriber(self, inner: S) -> Layered<Self, S>

where Self: Sized,

Composes this Layer with the given Subscriber, returning a Layered struct that implements Subscriber.

fn with_filter<F>(self, filter: F) -> Filtered<Self, F, S>

where Self: Sized, F: Filter<S>,

Available on crate features registry and std only.

Combines self with a Filter, returning a Filtered layer.

fn boxed(self) -> Box<dyn Layer<S> + Sync + Send>

where Self: Sized + Layer<S> + Send + Sync + 'static, S: Subscriber,

Available on crate features alloc or std only.

Erases the type of this Layer, returning a Boxed dyn Layer trait object.