node_modules/npm/test/tap/init-interrupt.js

// if "npm init" is interrupted with ^C, don't report
// "init written successfully"
var test = require("tap").test
var path = require("path")
var osenv = require("osenv")
var rimraf = require("rimraf")
var npmlog = require("npmlog")
var requireInject = require("require-inject")

var npm = require("../../lib/npm.js")

var PKG_DIR = path.resolve(__dirname, "init-interrupt")

test("setup", function (t) {
  cleanup()

  t.end()
})

test("issue #6684 remove confusing message", function (t) {

  var initJsonMock = function (dir, input, config, cb) {
    process.nextTick(function () {
      cb({message : "canceled"})
    })
  }
  initJsonMock.yes = function () { return true }

  npm.load({loglevel : "silent"}, function () {
    var log = ""
    var init = requireInject("../../lib/init", {
      "init-package-json": initJsonMock
    })

    // capture log messages
    npmlog.on("log", function (chunk) { log += chunk.message + "\n" } )

    init([], function (err, code) {
      t.ifError(err, "init ran successfully")
      t.notOk(code, "exited without issue")
      t.notSimilar(log, /written successfully/, "no success message written")
      t.similar(log, /canceled/, "alerted that init was canceled")

      t.end()
    })
  })
})

test("cleanup", function (t) {
  cleanup()

  t.end()
})

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