node_modules/npm/test/tap/lifecycle-path.js

var fs = require('fs')
var path = require('path')

var mkdirp = require('mkdirp')
var osenv = require('osenv')
var rimraf = require('rimraf')
var test = require('tap').test

var common = require('../common-tap.js')

var pkg = path.resolve(__dirname, 'lifecycle-path')
var link = path.resolve(pkg, 'node-bin')

var PATH
if (process.platform === 'win32') {
  // On Windows the 'comspec' environment variable is used,
  // so cmd.exe does not need to be on the path.
  PATH = 'C:\\foo\\bar'
} else {
  // On non-Windows, without the path to the shell, nothing usually works.
  PATH = '/bin:/usr/bin'
}

var printPath = 'console.log(process.env.PATH)\n'

var json = {
  name: 'glorb',
  version: '1.2.3',
  scripts: {
    path: './node-bin/node print-path.js'
  }
}

test('setup', function (t) {
  cleanup()
  mkdirp.sync(pkg)
  fs.writeFileSync(
    path.join(pkg, 'package.json'),
    JSON.stringify(json, null, 2)
  )
  fs.writeFileSync(path.join(pkg, 'print-path.js'), printPath)
  fs.symlinkSync(path.dirname(process.execPath), link, 'dir')
  t.end()
})

test('make sure the path is correct', function (t) {
  common.npm(['run-script', 'path'], {
    cwd: pkg,
    env: {
      PATH: PATH,
      stdio: [ 0, 'pipe', 2 ]
    }
  }, function (er, code, stdout) {
    if (er) throw er
    t.equal(code, 0, 'exit code')
    // remove the banner, we just care about the last line
    stdout = stdout.trim().split(/\r|\n/).pop()
    var pathSplit = process.platform === 'win32' ? ';' : ':'
    var root = path.resolve(__dirname, '../..')
    var actual = stdout.split(pathSplit).map(function (p) {
      if (p.indexOf(root) === 0) {
        p = '{{ROOT}}' + p.substr(root.length)
      }
      return p.replace(/\\/g, '/')
    })

    // get the ones we tacked on, then the system-specific requirements
    var expect = [
      '{{ROOT}}/bin/node-gyp-bin',
      '{{ROOT}}/test/tap/lifecycle-path/node_modules/.bin',
      path.dirname(process.execPath)
    ].concat(PATH.split(pathSplit).map(function (p) {
      return p.replace(/\\/g, '/')
    }))
    t.same(actual, expect)
    t.end()
  })
})

test('cleanup', function (t) {
  cleanup()
  t.end()
})

function cleanup () {
  process.chdir(osenv.tmpdir())
  rimraf.sync(pkg)
}