initial import

core/syncx/once_test.go

@@ -0,0 +1,20 @@
+package syncx
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestOnce(t *testing.T) {
+	var v int
+	add := Once(func() {
+		v++
+	})
+
+	for i := 0; i < 5; i++ {
+		add()
+	}
+
+	assert.Equal(t, 1, v)
+}