ci: add test for websocket

vendor/github.com/gorilla/websocket/example_test.go

@@ -0,0 +1,46 @@
+// Copyright 2015 The Gorilla WebSocket Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket_test
+
+import (
+	"log"
+	"net/http"
+	"testing"
+
+	"github.com/gorilla/websocket"
+)
+
+var (
+	c   *websocket.Conn
+	req *http.Request
+)
+
+// The websocket.IsUnexpectedCloseError function is useful for identifying
+// application and protocol errors.
+//
+// This server application works with a client application running in the
+// browser. The client application does not explicitly close the websocket. The
+// only expected close message from the client has the code
+// websocket.CloseGoingAway. All other other close messages are likely the
+// result of an application or protocol error and are logged to aid debugging.
+func ExampleIsUnexpectedCloseError() {
+
+	for {
+		messageType, p, err := c.ReadMessage()
+		if err != nil {
+			if websocket.IsUnexpectedCloseError(err, websocket.CloseGoingAway) {
+				log.Printf("error: %v, user-agent: %v", err, req.Header.Get("User-Agent"))
+			}
+			return
+		}
+		processMesage(messageType, p)
+	}
+}
+
+func processMesage(mt int, p []byte) {}
+
+// TestX prevents godoc from showing this entire file in the example. Remove
+// this function when a second example is added.
+func TestX(t *testing.T) {}