node/deps/npm/test/tap/url-dependencies.js

var test = require("tap").test
var rimraf = require("rimraf")
var path = require("path")
var osenv = require("osenv")
var mr = require("npm-registry-mock")
var pkg = path.resolve(__dirname, "url-dependencies")
var common = require("../common-tap")

var mockRoutes = {
  "get": {
    "/underscore/-/underscore-1.3.1.tgz": [200]
  }
}

test("url-dependencies: download first time", function (t) {
  cleanup()

  performInstall(t, function (output){
    if (!tarballWasFetched(output)){
      t.fail("Tarball was not fetched")
    } else {
      t.pass("Tarball was fetched")
    }
    t.end()
  })
})

test("url-dependencies: do not download subsequent times", function (t) {
  cleanup()

  performInstall(t, function () {
    performInstall(t, function (output) {
      if (tarballWasFetched(output)){
        t.fail("Tarball was fetched second time around")
      } else {
        t.pass("Tarball was not fetched")
      }
      t.end()
    })
  })
})

function tarballWasFetched(output){
  return output.indexOf("http fetch GET " + common.registry + "/underscore/-/underscore-1.3.1.tgz") > -1
}

function performInstall (t, cb) {
  mr({port: common.port, mocks: mockRoutes}, function (er, s) {
    var opts = {
      cwd : pkg,
      env: {
        "npm_config_registry": common.registry,
        "npm_config_cache_lock_stale": 1000,
        "npm_config_cache_lock_wait": 1000,
        "npm_config_loglevel": "http",
        HOME: process.env.HOME,
        Path: process.env.PATH,
        PATH: process.env.PATH
      }
    }
    common.npm(["install"], opts, function (err, code, stdout, stderr) {
      t.ifError(err, "install success")
      t.notOk(code, "npm install exited with code 0")
      s.close()
      cb(stderr)
    })
  })
}

function cleanup() {
  // windows fix for locked files
  process.chdir(osenv.tmpdir())
  rimraf.sync(path.resolve(pkg, "node_modules"))
}