Try to fix test on windows

lib/netext/httpext/error_codes.go

@@ -145,12 +145,16 @@ func errorCodeForError(err error) (errCode, string) {
 			return defaultNetNonTCPErrorCode, err.Error()
 		}
 		if sErr, ok := e.Err.(*os.SyscallError); ok {
-			switch sErr.Err {
+			switch sErr.Unwrap() {
 			case syscall.ECONNRESET:
 				return tcpResetByPeerErrorCode, fmt.Sprintf(tcpResetByPeerErrorCodeMsg, e.Op)
 			case syscall.EPIPE:
 				return tcpBrokenPipeErrorCode, fmt.Sprintf(tcpBrokenPipeErrorCodeMsg, e.Op)
 			}
+			code, msg := getOSSyscallErrorCode(e, sErr)
+			if code != 0 {
+				return code, msg
+			}
 		}
 		if e.Op == "dial" {
 			if e.Timeout() {

lib/netext/httpext/error_codes_syscall_posix.go

@@ -0,0 +1,12 @@
+// +build !windows
+
+package httpext
+
+import (
+	"net"
+	"os"
+)
+
+func getOSSyscallErrorCode(e *net.OpError, se *os.SyscallError) (errCode, string) {
+	return 0, ""
+}

lib/netext/httpext/error_codes_syscall_windows.go

@@ -0,0 +1,16 @@
+package httpext
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"syscall"
+)
+
+func getOSSyscallErrorCode(e *net.OpError, se *os.SyscallError) (errCode, string) {
+	switch se.Unwrap() {
+	case syscall.WSAECONNRESET:
+		return tcpResetByPeerErrorCode, fmt.Sprintf(tcpResetByPeerErrorCodeMsg, e.Op)
+	}
+	return 0, ""
+}