minio/pkg/pubsub/pubsub_test.go

92 lines
2.4 KiB
Go

// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package pubsub
import (
"fmt"
"testing"
"time"
)
func TestSubscribe(t *testing.T) {
ps := New()
ch1 := make(chan interface{}, 1)
ch2 := make(chan interface{}, 1)
doneCh := make(chan struct{})
defer close(doneCh)
ps.Subscribe(ch1, doneCh, nil)
ps.Subscribe(ch2, doneCh, nil)
ps.Lock()
defer ps.Unlock()
if len(ps.subs) != 2 {
t.Errorf("expected 2 subscribers")
}
}
func TestUnsubscribe(t *testing.T) {
ps := New()
ch1 := make(chan interface{}, 1)
ch2 := make(chan interface{}, 1)
doneCh1 := make(chan struct{})
doneCh2 := make(chan struct{})
ps.Subscribe(ch1, doneCh1, nil)
ps.Subscribe(ch2, doneCh2, nil)
close(doneCh1)
// Allow for the above statement to take effect.
time.Sleep(100 * time.Millisecond)
ps.Lock()
if len(ps.subs) != 1 {
t.Errorf("expected 1 subscriber")
}
ps.Unlock()
close(doneCh2)
}
func TestPubSub(t *testing.T) {
ps := New()
ch1 := make(chan interface{}, 1)
doneCh1 := make(chan struct{})
defer close(doneCh1)
ps.Subscribe(ch1, doneCh1, func(entry interface{}) bool { return true })
val := "hello"
ps.Publish(val)
msg := <-ch1
if msg != "hello" {
t.Errorf(fmt.Sprintf("expected %s , found %s", val, msg))
}
}
func TestMultiPubSub(t *testing.T) {
ps := New()
ch1 := make(chan interface{}, 1)
ch2 := make(chan interface{}, 1)
doneCh := make(chan struct{})
defer close(doneCh)
ps.Subscribe(ch1, doneCh, func(entry interface{}) bool { return true })
ps.Subscribe(ch2, doneCh, func(entry interface{}) bool { return true })
val := "hello"
ps.Publish(val)
msg1 := <-ch1
msg2 := <-ch2
if msg1 != "hello" && msg2 != "hello" {
t.Errorf(fmt.Sprintf("expected both subscribers to have%s , found %s and %s", val, msg1, msg2))
}
}