節點/快遞API測試未發現故障

Question

節點7.4.0 /快速4.14.0 /打字稿2.1.5/M 3..1.2 /柴3.5.0 /柴HTTP 3.0.0

我想測試採用摩卡/柴沒有找到資源，但在運行應用程序時，它的失敗顯示404錯誤

HeroRouter.ts

.... 
    /** 
    * GET one hero by id 
    */ 
    public getOne(req: Request, res: Response, next: NextFunction) { 
     let query = parseInt(req.params.id); 
     let hero = Heroes.find(hero => hero.id === query); 
     if (hero) { 
      res.status(200) 
       .send({ 
        message: 'Success', 
        status: res.status, 
        hero 
       }); 
     } 
     else { 
      res.status(404) 
       .send({ 
        message: 'No hero found with the given id.', 
        status: res.status 
       }); 
     } 
    } 

運行後會顯示以下日誌：

$ http localhost:3000/api/v1/heroes/-32 
HTTP/1.1 404 Not Found 
Connection: keep-alive 
Content-Length: 46 
Content-Type: application/json; charset=utf-8 
Date: Mon, 06 Feb 2017 12:53:34 GMT 
ETag: W/"2e-W+nFWN7hcnJDQ4ZwWcRkpQ" 
X-Powered-By: Express 

{ 
    "message": "No hero found with the given id." 
} 

BUT試圖寫測試將失敗：

herotest.ts 描述（ 'GET API/V1 /英雄/：ID'，（）=> {

it('should respond with Not Found',() => { 
     return chai.request(app).get('/api/v1/heroes/-32') 
      .then(res => { 
       expect(res.status).to.equal(404); 
      }); 
    }); 

}); 

NPM測試失敗

GET /api/v1/heroes/-32 404 1.209 ms - 46 
    1) should respond with Not Found 

    1 failing 

    1) GET api/v1/heroes/:id should respond with Not Found: 
    Error: Not Found 
     at Test.Request.callback (node_modules/superagent/lib/node/index.js:626:17) 
     at node_modules/superagent/lib/node/index.js:795:18 
     at IncomingMessage.<anonymous> (node_modules/superagent/lib/node/parsers/json.js:16:7) 
     at endReadableNT (_stream_readable.js:974:12) 
     at _combinedTickCallback (internal/process/next_tick.js:74:11) 
     at process._tickCallback (internal/process/next_tick.js:98:9) 

解決。按照謝爾蓋的回答 -

it('should respond with Not Found',() => { 
    return chai.request(app).get('/api/v1/heroes/-32') 
     .catch(function (res) { 
      expect(res.status).to.equal(404); 
     }); 
}); 

Answer 1

由於狀態代碼表示該請求未成功，superagent（其中堆棧跟蹤點）把這個像一個錯誤：source。您的then承諾分支從未執行，從而使您的代碼未被承諾拒絕。

看起來像這種行爲已被固定在兩個chai-http和superagent，但尚未發佈到NPM爲前：https://github.com/chaijs/chai-http/issues/75