未知命令
**未知命令** 錯誤是 WebDriver 錯誤，當驅動程式無法識別命令/HTTP 端點時出現。
示例
/session/{session id}/foo 端點不存在，將返回一個未知命令錯誤，並帶有 404 Not Found HTTP 狀態碼
bash
curl -i -d '{}' https://:4444/session/foo
http
HTTP/1.1 404 Not Found
Connection: close
Content-Type: application/json; charset=utf-8
Cache-Control: no-cache
Content-Length: 113
Date: Fri, 30 Mar 2018 15:30:51 GMT
{"value":{"error":"unknown command","message":"POST /session/asd did not match a known command","stacktrace":""}}