rename all remaining packages to internal/ (#12418)

This is to ensure that there are no projects
that try to import `minio/minio/pkg` into
their own repo. Any such common packages should
go to `https://github.com/minio/pkg`

internal/pubsub/pubsub_test.go

@@ -0,0 +1,91 @@
+// 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))
+	}
+}