node/deps/npm/test/tap/noargs-install-config-save.js

var common = require('../common-tap.js')
var test = require('tap').test
var npm = require.resolve('../../bin/npm-cli.js')
var path = require('path')
var fs = require('fs')
var rimraf = require('rimraf')
var mkdirp = require('mkdirp')

var mr = require('npm-registry-mock')

var spawn = require('child_process').spawn
var node = process.execPath

var pkg = path.resolve(process.env.npm_config_tmp || '/tmp',
  'noargs-install-config-save')

function writePackageJson () {
  rimraf.sync(pkg)
  mkdirp.sync(pkg)
  mkdirp.sync(pkg + '/cache')

  fs.writeFileSync(pkg + '/package.json', JSON.stringify({
    'author': 'Rocko Artischocko',
    'name': 'noargs',
    'version': '0.0.0',
    'devDependencies': {
      'underscore': '1.3.1'
    }
  }), 'utf8')
}

function createChild (args) {
  var env = {
    'npm_config_save': true,
    'npm_config_registry': common.registry,
    'npm_config_cache': pkg + '/cache',
    HOME: process.env.HOME,
    Path: process.env.PATH,
    PATH: process.env.PATH
  }

  if (process.platform === 'win32') {
    env.npm_config_cache = '%APPDATA%\\npm-cache'
  }

  return spawn(node, args, {
    cwd: pkg,
    env: env
  })
}

test('does not update the package.json with empty arguments', function (t) {
  writePackageJson()
  t.plan(1)

  mr({ port: common.port }, function (er, s) {
    var child = createChild([npm, 'install'])
    child.on('close', function () {
      var text = JSON.stringify(fs.readFileSync(pkg + '/package.json', 'utf8'))
      s.close()
      t.equal(text.indexOf('"dependencies'), -1, 'dependencies do not exist in file')
    })
  })
})

test('updates the package.json (adds dependencies) with an argument', function (t) {
  writePackageJson()
  t.plan(1)

  mr({ port: common.port }, function (er, s) {
    var child = createChild([npm, 'install', 'underscore'])
    child.on('close', function () {
      s.close()
      var text = JSON.stringify(fs.readFileSync(pkg + '/package.json', 'utf8'))
      t.notEqual(text.indexOf('"dependencies'), -1, 'dependencies exist in file')
    })
  })
})

test('cleanup', function (t) {
  rimraf.sync(pkg + '/cache')
  t.end()
})