Issue #270 - Add helper function to test that an element is not present.

tests/functional/lib/helpers.js

@@ -1,3 +1,41 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Additional tests.
+ */
+
+define([
+  'intern',
+  'intern/chai!assert'
+], function (intern, assert) {
+  'use strict';
+
+  function noElementByCssSelector(context, selector) {
+    return function () {
+      return context.get('remote')
+        .setFindTimeout(0)
+
+        .findByCssSelector(selector)
+          .then(assert.fail, function (err) {
+            assert.isTrue(/NoSuchElement/.test(String(err)));
+          })
+        .end()
+
+        .setFindTimeout(intern.config.pageLoadTimeout);
+    };
+  }
+
+  function noElementById(context, id) {
+    return noElementByCssSelector(context, '#' + id);
+  }
+
+  return {
+    noElementByCssSelector: noElementByCssSelector,
+    noElementById: noElementById
+  };
+
+});
+
+