fix ut: pool with badconn

main_test.go

@@ -12,10 +12,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/go-redis/redis/v8"
-
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
+
+	"github.com/go-redis/redis/v8"
 )
 
 const (
@@ -373,14 +373,28 @@ func (e badConnError) Timeout() bool   { return true }
 func (e badConnError) Temporary() bool { return false }
 
 type badConn struct {
-	net.TCPConn
-
 	readDelay, writeDelay time.Duration
 	readErr, writeErr     error
 }
 
 var _ net.Conn = &badConn{}
 
+func (cn *badConn) Close() error {
+	return nil
+}
+
+func (cn *badConn) LocalAddr() net.Addr {
+	return &net.TCPAddr{}
+}
+
+func (cn *badConn) RemoteAddr() net.Addr {
+	return &net.TCPAddr{}
+}
+
+func (cn *badConn) SetDeadline(t time.Time) error {
+	return nil
+}
+
 func (cn *badConn) SetReadDeadline(t time.Time) error {
 	return nil
 }