我是测试驱动开发的新手,我正在尝试使用超级自学。我很困惑为什么我一直得到错误“应用程序未定义”?这是我的请求(app)的调用,我在下面加粗。我试着查看文档,但似乎没有太多。我的所有路由都在一个名为“middleware”的文件中,该文件的开头如下:
var bodyParser = require('body-parser');
var helpers = require('./helpers.js'); // our custom middleware
var db = require('../DB/DB.js');
var router = require('../routes.js');
var path = require('path');
var fs = require('fs');
var gm = require('gm');
module.exports = function (app, express) {}
我使用supertest测试中间件文件路由的实际文件:
var chai = require('chai')
var assert = chai.assert;
var should = chai.should();
var expect = chai.expect;
var helpers = require("../config/helpers.js");
var middleware = require("../config/middleware.js");
// for when we eventually want to test against mock data
var fs = require('fs');
var path = require('path');
var supertest = require("supertest")(middleware);
describe('middleware API', function() {
it('responds with binary data', function(done) {
var imagePath = path.join(__dirname, '/../assets/drawings/', userName + '.png');
**request(app)**
.get(imagePath)
.expect(201)
.expect('Content-Type', 'image.png')
.parse(binaryParser)
.end(function(err, res) {
if (err) return done(err);
// binary response data is in res.body as a buffer
assert.ok(Buffer.isBuffer(res.body));
console.log("res=", res.body);
done();
});
});
it('sends back one image', function(done) {
**request(app)**
.get('/game/')
.expect(201)
.expect('Content-Type', 'image.png')
.expect('Content-Length', '1')
.parse(binaryParser)
.end(function(err, res) {
if (err) return done(err);
// binary response data is in res.body as a buffer
assert.ok(Buffer.isBuffer(res.body));
console.log("res=", res.body);
done();
})
})
})
答案 0 :(得分:3)
在文件的顶部,您需要定义express和app,即:
var express = require('express'),
app = express();
另外,请确保您已在节点中安装了express,即thru命令行:
npm install express --save
(使用" - save"将其添加到package.json文件中,这样可以轻松跟踪版本等,但如果其他人使用npm install安装您的项目,也会自动安装)。