学习TDD和我对“Hello World”服务器响应的第一个简单测试在Mocha中失败了.我正在使用Mocha.js,Superagent,& Expect.js.
当我卷曲-i localhost：8080时,我得到正确的响应和状态代码.
HTTP/1.1 200 OK Content-Type: text/plain Date: Mon,27 Apr 2015 17:55:36 GMT Connection: keep-alive Transfer-Encoding: chunked Hello World
测试代码：
var request = require('superagent');
var expect = require('expect.js');
// Test structure
describe('Suite one',function(){
it("should get a response that contains World",function(done){
request.get('localhost:8080').end(function(res){
// TODO check that response is okay
expect(res).to.exist;
expect(res.status).to.equal(200);
expect(res.body).to.contain('World');
done();
});
});
});
服务器代码：
var server = require('http').createServer(function(req,res){
res.writeHead(200,{"Content-Type":"text/plain"});
res.end('Hello World\n');
});
server.listen(8080,function(){
console.log("Server listening at port 8080");
});
摩卡输出：
Suite one
1) should get a response that contains World
0 passing (110ms)
1 failing
1) Suite one should get a response that contains World:
Uncaught TypeError: Cannot read property 'status' of null
at test.js:10:23
at _stream_readable.js:908:16
我试过谷歌搜索这个问题,但没有运气找出我做错了什么.
解决方法
回调的节点表示法是第一个参数错误.
Superagent遵循此节点策略.这是从superagent github site：
request
.post('/api/pet')
.send({ name: 'Manny',species: 'cat' })
.set('X-API-Key','foobar')
.set('Accept','application/json')
.end(function(err,res){
// Calling the end function will send the request
});
所以改变这一行
request.get('localhost:8080').end(function(res){
至
request.get('localhost:8080').end(function(err,res){
