ytui/pubsub/pt_test.go
2022-06-26 19:30:26 -04:00

81 lines
1.6 KiB
Go

package pubsub
import (
"fmt"
"sync"
"testing"
)
func TestDupePublisher(t *testing.T) {
pt := NewProgressTracker()
if _, err := pt.Publish("foo"); err != nil {
t.Fatalf("First publisher should not give error, err:%v", err)
}
if _, err := pt.Publish("foo"); err == nil {
t.Fatal("Dupe publisher should give error but got nil")
}
if _, err := pt.Publish("bar"); err != nil {
t.Fatalf("Different publisher should not give error, err:%v", err)
}
}
func TestSubSub(t *testing.T) {
pt := NewProgressTracker()
c1 := pt.Subscribe("foo")
select {
//Not Working: expected 1 expression
//case _, ok <- c1:
case <-c1:
default:
}
if c1 == nil {
t.Fatal("Subscriber should not get a closed channel")
}
c2 := pt.Subscribe("foo")
if c2 == nil {
t.Fatal("Subscriber should not get a closed channel")
}
}
func TestPubSub(t *testing.T) {
pt := NewProgressTracker()
pc, _ := pt.Publish("foo")
if pc == nil {
t.Fatal("Should not get nil channel")
}
sc := pt.Subscribe("foo")
fmt.Printf("From test: chan is %+v and %#v\n", sc, sc)
if sc == nil {
t.Fatal("Should not get nil channel")
}
wg := sync.WaitGroup{}
wg.Add(1)
go func() {
fmt.Println("Subscriber start")
c := 0
for range sc {
fmt.Println("Subscriber got msg")
c++
}
fmt.Println("Subscriber received close")
if c == 0 {
fmt.Println("Should have gotten update")
}
wg.Done()
fmt.Println("Subscriber Done")
}()
fmt.Println("Producer Start")
for i := 0; i < 10; i++ {
fmt.Println("Producer Sent")
pc <- "blah"
}
close(pc)
fmt.Println("Producer close")
t.Log("Now waiting")
fmt.Println("Now waiting")
wg.Wait()
}