mm (美眉，Mock伴侣)

$ npm install mm

var mm = require('mm');
var http = require('http');

var mockURL = '/foo';
var mockResData = 'mock data';
var mockResHeaders = { server: 'mock server' };
mm.http.request(mockURL, mockResData, mockResHeaders);
mm.https.request(mockURL, mockResData, mockResHeaders);

// http
http.get({
  path: '/foo'
}, function (res) {
  console.log(res.headers); // should be mock headers
  var body = '';
  res.on('data', function (chunk) {
    body += chunk.toString();
  });
  res.on('end', function () {
    console.log(body); // should equal 'mock data'
  });
});

// https
https.get({
  path: '/foo'
}, function (res) {
  console.log(res.headers); // should be mock headers
  var body = '';
  res.on('data', function (chunk) {
    body += chunk.toString();
  });
  res.on('end', function () {
    console.log(body); // should equal 'mock data'
  });
});

var mm = require('mm');
var http = require('http');

var mockURL = '/foo';
var reqError = null;
var resError = 'mock res error';
mm.http.requestError(mockURL, reqError, resError);

var req = http.get({
  path: '/foo'
}, function (res) {
  console.log(res.statusCode, res.headers); // 200 but never emit `end` event
  res.on('end', fucntion () {
    console.log('never show this message');
  });
});
req.on('error', function (err) {
  console.log(err); // should return mock err: err.name === 'MockHttpResponseError'
}

var mm = require('mm');
var fs = require('fs');

mm.error(fs, 'readFile', 'mock fs.readFile return error');

fs.readFile('/etc/hosts', 'utf8', function (err, content) {
  console.log(err); // should return mock err: err.name === 'MockError'

  mm.restore(); // remove all mock effects.

  fs.readFile('/etc/hosts', 'utf8', function (err, content) {
    console.log(err); // should return null
    console.log(content); // should show the host list
  });
});

mm.data(fs, 'readFile', new Buffer('some content'));

mm.empty(mysql, 'query');

mm.datas(urllib, 'request', [new Buffer('data'), { headers: { foo: 'bar' } }]);

var fs = require('fs');
var mm = require('mm');

mm(fs, 'readFile', function (path, callback) {
  process.nextTick(callback.bind(null, null, 'file contents here'));
});

$ git summary

 project  : mm
 repo age : 1 year, 2 months
 active   : 23 days
 commits  : 55
 files    : 16
 authors  :
    49  fengmk2                 89.1%
     4  dead-horse              7.3%
     1  AlsoTang                1.8%
     1  Alsotang                1.8%