mirror of https://github.com/status-im/op-geth.git
121 lines
2.9 KiB
Go
121 lines
2.9 KiB
Go
// Copyright 2016 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package event
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
var errInts = errors.New("error in subscribeInts")
|
|
|
|
func subscribeInts(max, fail int, c chan<- int) Subscription {
|
|
return NewSubscription(func(quit <-chan struct{}) error {
|
|
for i := 0; i < max; i++ {
|
|
if i >= fail {
|
|
return errInts
|
|
}
|
|
select {
|
|
case c <- i:
|
|
case <-quit:
|
|
return nil
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
}
|
|
|
|
func TestNewSubscriptionError(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
channel := make(chan int)
|
|
sub := subscribeInts(10, 2, channel)
|
|
loop:
|
|
for want := 0; want < 10; want++ {
|
|
select {
|
|
case got := <-channel:
|
|
if got != want {
|
|
t.Fatalf("wrong int %d, want %d", got, want)
|
|
}
|
|
case err := <-sub.Err():
|
|
if err != errInts {
|
|
t.Fatalf("wrong error: got %q, want %q", err, errInts)
|
|
}
|
|
if want != 2 {
|
|
t.Fatalf("got errInts at int %d, should be received at 2", want)
|
|
}
|
|
break loop
|
|
}
|
|
}
|
|
sub.Unsubscribe()
|
|
|
|
err, ok := <-sub.Err()
|
|
if err != nil {
|
|
t.Fatal("got non-nil error after Unsubscribe")
|
|
}
|
|
if ok {
|
|
t.Fatal("channel still open after Unsubscribe")
|
|
}
|
|
}
|
|
|
|
func TestResubscribe(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
var i int
|
|
nfails := 6
|
|
sub := Resubscribe(100*time.Millisecond, func(ctx context.Context) (Subscription, error) {
|
|
// fmt.Printf("call #%d @ %v\n", i, time.Now())
|
|
i++
|
|
if i == 2 {
|
|
// Delay the second failure a bit to reset the resubscribe interval.
|
|
time.Sleep(200 * time.Millisecond)
|
|
}
|
|
if i < nfails {
|
|
return nil, errors.New("oops")
|
|
}
|
|
sub := NewSubscription(func(unsubscribed <-chan struct{}) error { return nil })
|
|
return sub, nil
|
|
})
|
|
|
|
<-sub.Err()
|
|
if i != nfails {
|
|
t.Fatalf("resubscribe function called %d times, want %d times", i, nfails)
|
|
}
|
|
}
|
|
|
|
func TestResubscribeAbort(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
done := make(chan error, 1)
|
|
sub := Resubscribe(0, func(ctx context.Context) (Subscription, error) {
|
|
select {
|
|
case <-ctx.Done():
|
|
done <- nil
|
|
case <-time.After(2 * time.Second):
|
|
done <- errors.New("context given to resubscribe function not canceled within 2s")
|
|
}
|
|
return nil, nil
|
|
})
|
|
|
|
sub.Unsubscribe()
|
|
if err := <-done; err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|