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package pubsub
import (
"sync"
"testing"
"github.com/bradfitz/iter"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestDoubleClose(t *testing.T) {
ps := NewPubSub()
ps.Close()
ps.Close()
}
func testBroadcast(t testing.TB, subs, vals int) {
ps := NewPubSub()
var wg sync.WaitGroup
for range iter.N(subs) {
wg.Add(1)
s := ps.Subscribe()
go func() {
defer wg.Done()
var e int
for i := range s.Values {
assert.Equal(t, e, i.(int))
e++
}
assert.Equal(t, vals, e)
}()
}
for i := range iter.N(vals) {
ps.Publish(i)
}
ps.Close()
wg.Wait()
}
func TestBroadcast(t *testing.T) {
testBroadcast(t, 100, 10)
}
func BenchmarkBroadcast(b *testing.B) {
for range iter.N(b.N) {
testBroadcast(b, 10, 1000)
}
}
func TestCloseSubscription(t *testing.T) {
ps := NewPubSub()
ps.Publish(1)
s := ps.Subscribe()
select {
case <-s.Values:
t.FailNow()
default:
}
ps.Publish(2)
s2 := ps.Subscribe()
ps.Publish(3)
require.Equal(t, 2, <-s.Values)
require.EqualValues(t, 3, <-s.Values)
s.Close()
_, ok := <-s.Values
require.False(t, ok)
ps.Publish(4)
ps.Close()
require.Equal(t, 3, <-s2.Values)
require.Equal(t, 4, <-s2.Values)
require.Nil(t, <-s2.Values)
s2.Close()
}
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