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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| package relayer | ||
|
|
||
| import ( | ||
| "context" | ||
| "maps" | ||
| "sync" | ||
| "testing" | ||
|
|
||
| "github.com/omni-network/omni/lib/cchain" | ||
| "github.com/omni-network/omni/lib/errors" | ||
| "github.com/omni-network/omni/lib/netconf" | ||
| "github.com/omni-network/omni/lib/xchain" | ||
|
|
||
| "github.com/stretchr/testify/require" | ||
| "golang.org/x/sync/errgroup" | ||
| ) | ||
|
|
||
| // TestLeaderStreamer tests the leader streamer. | ||
| func TestLeaderStreamer(t *testing.T) { | ||
| t.Parallel() | ||
|
|
||
| // upstream tracks upstream requests and returns test responses | ||
| upstream := newUpstream() | ||
| upstreamFunc := func( | ||
| ctx context.Context, | ||
| chainVer xchain.ChainVersion, | ||
| attestOffset uint64, | ||
| workerName string, | ||
| callback cchain.ProviderCallback, | ||
| ) error { | ||
| resps := upstream.Req(workerName, attestOffset) | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return ctx.Err() | ||
| case resp := <-resps: | ||
| err := callback(ctx, xchain.Attestation{AttestHeader: xchain.AttestHeader{ChainVersion: chainVer, AttestOffset: resp}}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| streamer := newLeaderStreamer(upstreamFunc, netconf.Simnet) | ||
|
|
||
| ctx := context.Background() | ||
| var eg errgroup.Group | ||
| errDone := errors.New("done") | ||
|
|
||
| // startStream starts a worker stream from `from` to `to`, ensuring strictly sequential attestations. | ||
| startStream := func(worker string, from uint64, to uint64) error { | ||
| next := from | ||
| return streamer(ctx, xchain.ChainVersion{}, from, worker, func(ctx context.Context, att xchain.Attestation) error { | ||
| if att.AttestOffset != next { | ||
| return errors.New("unexpected offset") | ||
| } | ||
| next++ | ||
|
|
||
| if att.AttestOffset == to { | ||
| return errDone | ||
| } | ||
|
|
||
| return nil | ||
| }) | ||
| } | ||
|
|
||
| w1 := "worker1" | ||
| w2 := "worker2" | ||
| w3 := "worker3" | ||
|
|
||
| eg.Go(func() error { | ||
| // worker 1 streams from 3 to 5 as leader | ||
| return startStream(w1, 3, 5) | ||
| }) | ||
| upstream.Respond(w1, 3) // w1 starts leader streaming at 3 | ||
| eg.Go(func() error { | ||
| // worker 2 streams from 1 to 7, 1-4 as leader, 4-5 from cache, 6-7 as leader | ||
| return startStream(w2, 1, 7) | ||
| }) | ||
| upstream.Respond(w2, 1) // w2 starts leader streaming at 1 | ||
| upstream.Respond(w1, 4) // w1 continues leader streaming | ||
| upstream.Respond(w2, 2) // w2 continues leader streaming | ||
| upstream.Respond(w2, 3) // w2 overlaps w1, switch to cache | ||
| upstream.Respond(w1, 5) // w1 is done | ||
| upstream.Respond(w2, 6) // w2 switches back to lead streaming | ||
| upstream.Respond(w2, 7) // w2 is done | ||
|
|
||
| eg.Go(func() error { | ||
| // worker 3 streams from 8 to 8 as leader | ||
| return startStream(w3, 1, 8) | ||
| }) | ||
| upstream.Respond(w3, 8) // w3 starts leader streaming at 8 and is done | ||
|
|
||
| require.ErrorIs(t, eg.Wait(), errDone) | ||
| require.EqualValues(t, map[string][]uint64{ | ||
| w1: {3}, | ||
| w2: {1, 6}, | ||
| w3: {8}, | ||
| }, upstream.Reqs()) | ||
| } | ||
|
|
||
| func newUpstream() *upstream { | ||
| return &upstream{ | ||
| reqs: make(map[string][]uint64), | ||
| resps: make(map[string]chan uint64), | ||
| } | ||
| } | ||
|
|
||
| type upstream struct { | ||
| mu sync.Mutex | ||
| reqs map[string][]uint64 | ||
| resps map[string]chan uint64 | ||
| } | ||
|
|
||
| func (u *upstream) Respond(worker string, offset uint64) { | ||
| u.mu.Lock() | ||
| resp, ok := u.resps[worker] | ||
| if !ok { | ||
| resp = make(chan uint64) | ||
| u.resps[worker] = resp | ||
| } | ||
| u.mu.Unlock() | ||
|
|
||
| resp <- offset | ||
| } | ||
|
|
||
| func (u *upstream) Reqs() map[string][]uint64 { | ||
| u.mu.Lock() | ||
| defer u.mu.Unlock() | ||
|
|
||
| return maps.Clone(u.reqs) | ||
| } | ||
|
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| func (u *upstream) Req(worker string, from uint64) chan uint64 { | ||
| u.mu.Lock() | ||
| u.reqs[worker] = append(u.reqs[worker], from) | ||
|
|
||
| resp, ok := u.resps[worker] | ||
| if !ok { | ||
| resp = make(chan uint64) | ||
| u.resps[worker] = resp | ||
| } | ||
| u.mu.Unlock() | ||
|
|
||
| return resp | ||
| } |
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