fix syncx/barrier test case (#123)

core/syncx/barrier_test.go

@@ -1,6 +1,7 @@
 package syncx
 
 import (
+	"sync"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -10,11 +11,15 @@ func TestBarrier_Guard(t *testing.T) {
 	const total = 10000
 	var barrier Barrier
 	var count int
+	var wg sync.WaitGroup
+	wg.Add(total)
 	for i := 0; i < total; i++ {
-		barrier.Guard(func() {
+		go barrier.Guard(func() {
 			count++
+			wg.Done()
 		})
 	}
+	wg.Wait()
 	assert.Equal(t, total, count)
 }
 
@@ -22,10 +27,14 @@ func TestBarrierPtr_Guard(t *testing.T) {
 	const total = 10000
 	barrier := new(Barrier)
 	var count int
+	wg := new(sync.WaitGroup)
+	wg.Add(total)
 	for i := 0; i < total; i++ {
-		barrier.Guard(func() {
+		go barrier.Guard(func() {
 			count++
+			wg.Done()
 		})
 	}
+	wg.Wait()
 	assert.Equal(t, total, count)
 }