how to test node.js http client with mocha?

Question

I have a node.js module that HTTP POSTs a JSON request,

I want to test for correct url, headers, request body and that the request is actually executed.

I'm using Mocha for a testing framework. how do I test it ?

Answer 1

You can use nock . you can intercept the http request and with certain properties

Answer 2

I have used Sinon.js for this type of thing.

sinon = require 'sinon'
assert = require "assert"
describe 'client', ->
  describe '#mainRequest()', ->
    it 'should make the correct HTTP call', ->
      url = "http://some.com/api/blah?command=true"
      request = {}
      sinon.stub request, 'get', (params, cb) -> cb null, { statusCode: 200 }, "OK"
      client = new MyHttpClient request  
      client.sendRequest()
      assert.ok request.get.calledWith(url)

To simplify testing MyHttpClient class takes a request object as a paramter to the constructor. If not provided, it just uses require 'request'.

Answer 3

Try SuperTest in combination with superagent . All the tests from express are written with SuperTest .

For example:

var request = require('supertest')
  , express = require('express');

var app = express();

app.get('/user', function(req, res){
  res.send(201, { name: 'tobi' });
});

describe('GET /users', function(){
  it('respond with json', function(done){
    request(app)
      .get('/user')
      .set('Accept', 'application/json')
      .expect('Content-Type', /json/)
      .expect(200, done);
  })
})