Official Go implementation of the Ethereum protocol
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go-ethereum/event/multisub_test.go

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3.8 KiB

// Copyright 2023 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 (
"testing"
"time"
)
func TestMultisub(t *testing.T) {
// Create a double subscription and ensure events propagate through
var (
feed1 Feed
feed2 Feed
)
sink1 := make(chan int, 1)
sink2 := make(chan int, 1)
sub1 := feed1.Subscribe(sink1)
sub2 := feed2.Subscribe(sink2)
sub := JoinSubscriptions(sub1, sub2)
feed1.Send(1)
select {
case n := <-sink1:
if n != 1 {
t.Errorf("sink 1 delivery mismatch: have %d, want %d", n, 1)
}
default:
t.Error("sink 1 missing delivery")
}
feed2.Send(2)
select {
case n := <-sink2:
if n != 2 {
t.Errorf("sink 2 delivery mismatch: have %d, want %d", n, 2)
}
default:
t.Error("sink 2 missing delivery")
}
// Unsubscribe and ensure no more events are delivered
sub.Unsubscribe()
select {
case <-sub.Err():
case <-time.After(50 * time.Millisecond):
t.Error("multisub didn't propagate closure")
}
feed1.Send(11)
select {
case n := <-sink1:
t.Errorf("sink 1 unexpected delivery: %d", n)
default:
}
feed2.Send(22)
select {
case n := <-sink2:
t.Errorf("sink 2 unexpected delivery: %d", n)
default:
}
}
func TestMutisubPartialUnsubscribe(t *testing.T) {
// Create a double subscription but terminate one half, ensuring no error
// is propagated yet up to the outer subscription
var (
feed1 Feed
feed2 Feed
)
sink1 := make(chan int, 1)
sink2 := make(chan int, 1)
sub1 := feed1.Subscribe(sink1)
sub2 := feed2.Subscribe(sink2)
sub := JoinSubscriptions(sub1, sub2)
sub1.Unsubscribe()
select {
case <-sub.Err():
t.Error("multisub propagated closure")
case <-time.After(50 * time.Millisecond):
}
// Ensure that events cross only the second feed
feed1.Send(1)
select {
case n := <-sink1:
t.Errorf("sink 1 unexpected delivery: %d", n)
default:
}
feed2.Send(2)
select {
case n := <-sink2:
if n != 2 {
t.Errorf("sink 2 delivery mismatch: have %d, want %d", n, 2)
}
default:
t.Error("sink 2 missing delivery")
}
// Unsubscribe and ensure no more events are delivered
sub.Unsubscribe()
select {
case <-sub.Err():
case <-time.After(50 * time.Millisecond):
t.Error("multisub didn't propagate closure")
}
feed1.Send(11)
select {
case n := <-sink1:
t.Errorf("sink 1 unexpected delivery: %d", n)
default:
}
feed2.Send(22)
select {
case n := <-sink2:
t.Errorf("sink 2 unexpected delivery: %d", n)
default:
}
}
func TestMultisubFullUnsubscribe(t *testing.T) {
// Create a double subscription and terminate the multi sub, ensuring an
// error is propagated up.
var (
feed1 Feed
feed2 Feed
)
sink1 := make(chan int, 1)
sink2 := make(chan int, 1)
sub1 := feed1.Subscribe(sink1)
sub2 := feed2.Subscribe(sink2)
sub := JoinSubscriptions(sub1, sub2)
sub.Unsubscribe()
select {
case <-sub.Err():
case <-time.After(50 * time.Millisecond):
t.Error("multisub didn't propagate closure")
}
// Ensure no more events are delivered
feed1.Send(1)
select {
case n := <-sink1:
t.Errorf("sink 1 unexpected delivery: %d", n)
default:
}
feed2.Send(2)
select {
case n := <-sink2:
t.Errorf("sink 2 unexpected delivery: %d", n)
default:
}
}