Struct entraidLikeProvider

internal_test.go:973–978

entraidLikeProvider mimics the exact semantics of github.com/redis/go-redis-entraid's StreamingCredentialsProvider relevant to issue #3772: it deduplicates subscriptions by listener pointer identity, and every call to Subscribe returns a FRESH UnsubscribeFunc closure that removes the listener by poi

// equivalent: the first one called removes the entry, any subsequent call
// is a safe no-op.
type entraidLikeProvider struct {
	mu         sync.Mutex
	listeners  []auth.CredentialsListener
	subscribeN int32
	unsubCalls int32
}

func (p *entraidLikeProvider) Subscribe(listener auth.CredentialsListener) (auth.Credentials, auth.UnsubscribeFunc, error) {
	atomic.AddInt32(&p.subscribeN, 1)