add comments

pkg/pod/entrypoint_lookup_impl_test.go

@@ -52,15 +52,18 @@ func newfakeHTTP() fakeHTTP {
 }
 
 func (f *fakeHTTP) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	// Requests to container registry except "GET" will be handled by the registry handler.
 	if r.Header["User-Agent"][0] == "go-containerregistry" && !(strings.HasPrefix(r.URL.Path, "/v2/task") && r.Method == "GET") {
 		f.reg.ServeHTTP(w, r)
 		return
 	}
 
+	// For Ping requests, the server will need basic authenticaion and reutrn 401
 	if r.Header["Authorization"] == nil {
 		w.Header().Add("WWW-Authenticate", "basic")
 		w.WriteHeader(401)
 	} else {
+		// Handle the requests with matching authorization.
 		auth := strings.Split(r.Header["Authorization"][0], " ")[1]
 		if auth == base64.StdEncoding.EncodeToString([]byte(username+":"+password)) {
 			f.reg.ServeHTTP(w, r)