Make tests robust (#1072)

* Do not warn about nested callbacks in tests

The tests are always deeper nested than regular files. So accept
deeper nesting in these files.

* Make the tests robust

Currently the tests often fail because of timeouts. This increases
the maximum timeout for these tests to prevent that from happening.

test/prompt-suggestion.js

@@ -9,6 +9,8 @@ const FileEditor = require('mem-fs-editor');
 const Storage = require('../lib/util/storage');
 const promptSuggestion = require('../lib/util/prompt-suggestion');
 
+/* eslint max-nested-callbacks: ["warn", 6] */
+
 describe('PromptSuggestion', () => {
   beforeEach(function () {
     this.memFs = env.createEnv().sharedFs;

test/user.js

@@ -10,9 +10,13 @@ const shell = require('shelljs');
 const sinon = require('sinon');
 const Base = require('..');
 
+/* eslint max-nested-callbacks: ["warn", 5] */
+
 const tmpdir = path.join(os.tmpdir(), 'yeoman-user');
 
-describe('Base#user', () => {
+describe('Base#user', function () {
+  this.timeout(5000);
+
   beforeEach(function () {
     this.prevCwd = process.cwd();
     this.tmp = tmpdir;