node-suppose's Introduction

Node.js - suppose

Have you ever heard of the command line program expect? Basically, expect allows you to automate command line programs. suppose is a programmable Node.js module that allows the same behavior.

Why?

From the expect wikipedia page, you can see many examples of expect scripts automating tasks such as telnet or ftp sessions. Now you can easily write Node.js scripts to do the same. This may be most beneficial during testing.

Installation

npm install suppose

Example

Automate the command npm init, which initializes a new npm module.

var suppose = require('suppose')
  , fs = require('fs')
  , assert = require('assert')

process.chdir('/tmp/awesome');
fs.writeFileSync('/tmp/awesome/README.md', 'READ IT')
suppose('npm', ['init'])
  .debug(fs.createWriteStream('/tmp/debug.txt')) //optional writeable output stream
  .on(/name\: \([\w|\-]+\)[\s]*/).respond('awesome_package\n')
  .on('version: (0.0.0) ').respond('0.0.1\n')
  .on('description: ').respond("It's an awesome package man!\n")
  .on('entry point: (index.js) ').respond("\n")
  .on('test command: ').respond('npm test\n')
  .on('git repository: ').respond("\n")
  .on('keywords: ').respond('awesome, cool\n')
  .on('author: ').respond('JP Richardson\n')
  .on('license: (BSD) ').respond('MIT\n')
  .on('ok? (yes) ' ).respond('yes\n')
.error(function(err){
  console.log(err.message);
})
.end(function(code){
  var packageFile = '/tmp/awesome/package.json';
  fs.readFile(packageFile, function(err, data){
    var packageObj = JSON.parse(data.toString());
    console.log(packageObj.name); //'awesome_package'
  })
})