Added basic integration tests for all built-in matchers

spec/helpers/domHelpers.js

@@ -0,0 +1,24 @@
+(function(env) {
+  function domHelpers() {
+    var doc;
+
+    if (typeof document !== 'undefined') {
+      doc = document;
+    } else {
+      var JSDOM = require('jsdom').JSDOM;
+      var dom = new JSDOM();
+      doc = dom.window.document;
+    }
+
+    return {
+      document: doc,
+      createElementWithClassName: function(className) {
+        var el = this.document.createElement('div');
+        el.className = className;
+        return el;
+      }
+    };
+  }
+
+  env.domHelpers = domHelpers;
+})(jasmine.getEnv());