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Merge pull request #3 from iand/routing-probe
routing: integrate probe state machine
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package kademlia | ||
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|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "reflect" | ||
| "testing" | ||
| ) | ||
|
|
||
| type NullSM[E any, S any] struct{} | ||
|
|
||
| func (NullSM[E, S]) Advance(context.Context, E) S { | ||
| var v S | ||
| return v | ||
| } | ||
|
|
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| type RecordingSM[E any, S any] struct { | ||
| State S | ||
| Received E | ||
| } | ||
|
|
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| func NewRecordingSM[E any, S any](response S) *RecordingSM[E, S] { | ||
| return &RecordingSM[E, S]{ | ||
| State: response, | ||
| } | ||
| } | ||
|
|
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| func (r *RecordingSM[E, S]) Advance(ctx context.Context, e E) S { | ||
| r.Received = e | ||
| return r.State | ||
| } | ||
|
|
||
| // expectBehaviourEvent selects on a behaviour's ready channel until it becomes ready and then checks the perform | ||
| // mehtod for the expected event type. Unexpected events are ignored and selecting resumes. | ||
| // The function returns when an event matching the type of expected is received or when the context is cancelled. | ||
| func expectBehaviourEvent[I DhtEvent, O DhtEvent](t *testing.T, ctx context.Context, b Behaviour[I, O], expected O) (O, error) { | ||
| t.Helper() | ||
| for { | ||
| select { | ||
| case <-b.Ready(): | ||
| ev, ok := b.Perform(ctx) | ||
| if !ok { | ||
| continue | ||
| } | ||
| t.Logf("saw event: %T\n", ev) | ||
| if reflect.TypeOf(ev) == reflect.TypeOf(expected) { | ||
| return ev, nil | ||
| } | ||
| case <-ctx.Done(): | ||
| var v O | ||
| return v, fmt.Errorf("test deadline exceeded") | ||
| } | ||
| } | ||
| } |
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