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Fixed timeoutTicker #331
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Fixed timeoutTicker #331
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| package consensus | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "github.com/tendermint/tendermint/libs/log" | ||
| "github.com/tendermint/tendermint/libs/utils" | ||
| "github.com/tendermint/tendermint/libs/utils/scope" | ||
| "testing" | ||
| "time" | ||
| ) | ||
|
|
||
| func TestTicker(t *testing.T) { | ||
| err := scope.Run(t.Context(), func(ctx context.Context, s scope.Scope) error { | ||
| logger, _ := log.NewDefaultLogger("plain", "debug") | ||
| ticker := NewTimeoutTicker(logger) | ||
| ch := ticker.Chan() | ||
| s.SpawnBg(func() error { | ||
| err := ticker.Run(ctx) | ||
| if ctx.Err() == nil { | ||
| return fmt.Errorf("ticker terminated with %v, before the test ended", err) | ||
| } | ||
| return utils.IgnoreCancel(err) | ||
| }) | ||
| if got := len(ch); got > 0 { | ||
| return fmt.Errorf("expected empty, got len=%v", got) | ||
| } | ||
|
|
||
| t.Log("Fill the channel.") | ||
| h := int64(0) | ||
| for h < int64(cap(ch)) { | ||
| h += 1 | ||
| ticker.ScheduleTimeout(timeoutInfo{Height: h, Duration: 0}) | ||
| for len(ch) < int(h) { | ||
| if err := utils.Sleep(ctx, 10*time.Millisecond); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } | ||
| t.Log("Add a bunch of timeouts blindly.") | ||
| for range 3 { | ||
| h += 1 | ||
| ticker.ScheduleTimeout(timeoutInfo{Height: h, Duration: 0}) | ||
| if err := utils.Sleep(ctx, 100*time.Millisecond); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| t.Log("Await the latest timeout") | ||
| for { | ||
| got, err := utils.Recv(ctx, ch) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if got.Height == h { | ||
| return nil | ||
| } | ||
| } | ||
| }) | ||
| if err != nil { | ||
| t.Fatal(err) | ||
| } | ||
| } |
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Opinions coming up:
I am honestly against the entire pattern that tendermint seems to follow: the less than optimal abstractions like
BaseServicethat only serve to convolute the logic, reduce readability and make it easy for footguns to materialise. This approach is an anti-pattern in Golang as far as I understand the general Go community sentiment. A lot of it seem to have been stemmed from "Java Best Practices" that do not translate well in Go.Go is supposed to be boring to read, simple
ifandelses.I hope that at Sei we can move away from this kind of abstraction in favour simple boring code that puts readability first.