lib/mkdirs/__tests__: added another

lib/mkdirs/__tests__/opts-undef.test.js

@@ -0,0 +1,29 @@
+var assert = require('assert')
+var fs = require('fs')
+var path = require('path')
+var os = require('os')
+var fse = require(process.cwd())
+var mkdirs = require('../mkdirs')
+
+/* global beforeEach, describe, it */
+
+describe('mkdirs / opts-undef', function () {
+  var TEST_DIR
+
+  beforeEach(function (done) {
+    TEST_DIR = path.join(os.tmpdir(), 'fs-extra', 'mkdirs')
+    fse.emptyDir(TEST_DIR, done)
+  })
+
+  // https://github.com/substack/node-mkdirp/issues/45
+  it('should not hang', function (done) {
+    var newDir = path.join(TEST_DIR, 'doest', 'not', 'exist')
+    assert(!fs.existsSync(newDir))
+
+    mkdirs(newDir, undefined, function (err) {
+      assert.ifError(err)
+      assert(fs.existsSync(newDir))
+      done()
+    })
+  })
+})