refactor: connection manager

route/conn_monitor_test.go

@@ -0,0 +1,43 @@
+package route_test
+
+import (
+	"context"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/sagernet/sing-box/route"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestMonitor(t *testing.T) {
+	t.Parallel()
+	var closer myCloser
+	closer.Add(1)
+	monitor := route.NewConnectionMonitor()
+	require.NoError(t, monitor.Start())
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	monitor.Add(ctx, &closer)
+	done := make(chan struct{})
+	go func() {
+		closer.Wait()
+		close(done)
+	}()
+	select {
+	case <-done:
+	case <-time.After(time.Second + 100*time.Millisecond):
+		t.Fatal("timeout")
+	}
+	cancel()
+	require.NoError(t, monitor.Close())
+}
+
+type myCloser struct {
+	sync.WaitGroup
+}
+
+func (c *myCloser) Close() error {
+	c.Done()
+	return nil
+}