feat(plugins): changed what datasources should return, they should now return the datasource constructor

public/test/lib/common.ts

@@ -2,6 +2,7 @@
 
 var _global = <any>(window);
 var beforeEach = _global.beforeEach;
+var before = _global.before;
 var describe = _global.describe;
 var it = _global.it;
 var sinon = _global.sinon;
@@ -9,10 +10,12 @@ var expect = _global.expect;
 
 var angularMocks = {
   module: _global.module,
+  inject: _global.inject,
 };
 
 export {
   beforeEach,
+  before,
   describe,
   it,
   sinon,