fix test cases

proxy/blackhole/blackhole.go

@@ -3,12 +3,17 @@ package blackhole
 
 import (
 	"context"
+	"errors"
 	"time"
 
 	"v2ray.com/core/common"
 	"v2ray.com/core/transport/ray"
 )
 
+var (
+	errConnectionBlocked = errors.New("Blackhole: connection blocked.")
+)
+
 // Handler is an outbound connection that sliently swallow the entire payload.
 type Handler struct {
 	response ResponseConfig
@@ -28,12 +33,9 @@ func New(ctx context.Context, config *Config) (*Handler, error) {
 // Dispatch implements OutboundHandler.Dispatch().
 func (v *Handler) Process(ctx context.Context, outboundRay ray.OutboundRay) error {
 	v.response.WriteTo(outboundRay.OutboundOutput())
-	// CloseError() will immediately close the connection.
 	// Sleep a little here to make sure the response is sent to client.
-	time.Sleep(time.Millisecond * 500)
-	outboundRay.OutboundInput().CloseError()
-	outboundRay.OutboundOutput().CloseError()
-	return nil
+	time.Sleep(time.Second)
+	return errConnectionBlocked
 }
 
 func init() {