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124 lines
3.4 KiB
Go
124 lines
3.4 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package pubsub
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import (
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"fmt"
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"testing"
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"time"
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)
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func TestSubscribe(t *testing.T) {
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ps := New(2)
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ch1 := make(chan interface{}, 1)
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ch2 := make(chan interface{}, 1)
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doneCh := make(chan struct{})
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defer close(doneCh)
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if err := ps.Subscribe(ch1, doneCh, nil); err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if err := ps.Subscribe(ch2, doneCh, nil); err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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ps.Lock()
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defer ps.Unlock()
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if len(ps.subs) != 2 {
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t.Fatalf("expected 2 subscribers")
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}
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}
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func TestSubscribeExceedingLimit(t *testing.T) {
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ps := New(2)
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ch1 := make(chan interface{}, 1)
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ch2 := make(chan interface{}, 1)
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ch3 := make(chan interface{}, 1)
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doneCh := make(chan struct{})
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defer close(doneCh)
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if err := ps.Subscribe(ch1, doneCh, nil); err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if err := ps.Subscribe(ch2, doneCh, nil); err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if err := ps.Subscribe(ch3, doneCh, nil); err == nil {
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t.Fatalf("unexpected nil err")
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}
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}
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func TestUnsubscribe(t *testing.T) {
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ps := New(2)
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ch1 := make(chan interface{}, 1)
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ch2 := make(chan interface{}, 1)
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doneCh1 := make(chan struct{})
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doneCh2 := make(chan struct{})
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if err := ps.Subscribe(ch1, doneCh1, nil); err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if err := ps.Subscribe(ch2, doneCh2, nil); err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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close(doneCh1)
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// Allow for the above statement to take effect.
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time.Sleep(100 * time.Millisecond)
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ps.Lock()
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if len(ps.subs) != 1 {
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t.Fatal("expected 1 subscriber")
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}
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ps.Unlock()
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close(doneCh2)
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}
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func TestPubSub(t *testing.T) {
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ps := New(1)
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ch1 := make(chan interface{}, 1)
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doneCh1 := make(chan struct{})
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defer close(doneCh1)
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if err := ps.Subscribe(ch1, doneCh1, func(entry interface{}) bool { return true }); err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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val := "hello"
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ps.Publish(val)
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msg := <-ch1
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if msg != "hello" {
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t.Fatalf(fmt.Sprintf("expected %s , found %s", val, msg))
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}
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}
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func TestMultiPubSub(t *testing.T) {
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ps := New(2)
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ch1 := make(chan interface{}, 1)
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ch2 := make(chan interface{}, 1)
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doneCh := make(chan struct{})
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defer close(doneCh)
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if err := ps.Subscribe(ch1, doneCh, func(entry interface{}) bool { return true }); err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if err := ps.Subscribe(ch2, doneCh, func(entry interface{}) bool { return true }); err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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val := "hello"
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ps.Publish(val)
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msg1 := <-ch1
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msg2 := <-ch2
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if msg1 != "hello" && msg2 != "hello" {
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t.Fatalf(fmt.Sprintf("expected both subscribers to have%s , found %s and %s", val, msg1, msg2))
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}
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}
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