diff --git a/karma.conf.js b/karma.conf.js
index 5955f21..937e002 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -23,6 +23,8 @@ function listFiles() {
 
     var patterns = [].concat(wiredep(wiredepOptions).js)
         .concat([
+            './src/commons.js',
+            './src/noosfero.js',
             './src/noosfero-specs.js'
             ]
             //[
@@ -124,7 +126,8 @@ module.exports = function (config) {
     // It was not possible to do it there because karma doesn't let us now if we are
     // running a single test or not
      configuration.preprocessors = {
-         'src/**/*.js': ['sourcemap']
+         'src/**/*.js': ['sourcemap'],
+         'src/**/*.ts': ['sourcemap']
      };
     //     'src/**/*.js': ['sourcemap'],
     //     'src/**/*.[sS]pec.ts': ['sourcemap']
diff --git a/src/app/components/noosfero-articles/article/article.directive.spec.ts b/src/app/components/noosfero-articles/article/article.directive.spec.ts
index 89c6d0a..6e2fd5c 100644
--- a/src/app/components/noosfero-articles/article/article.directive.spec.ts
+++ b/src/app/components/noosfero-articles/article/article.directive.spec.ts
@@ -8,21 +8,21 @@ import {ArticleDirective} from './article.directive';
 const tcb = new TestComponentBuilder();
 
 
+let html = '<noosfero-article [article]="ctr.article" [profile]="ctrl.profile"></noosfero-article>';
+
 // Create a component to include your testing component 
-@Component({ selector: 'my-test' , template: '<hr />'})
+@Component({ selector: 'my-test', template: html, directives: [ArticleDirective] })
 class TestArticleDirective {
     article = { type: 'TinyMceArticle' };
     profile = { name: 'profile-name' };
-    constructor(){
+    constructor() {
     }
 }
 
 
 describe("Article Directive", () => {
     it("receives the article and profile as inputs", done => {
-        let html = '<noosfero-article [article]="ctr.article" [profile]="ctrl.profile"></noosfero-article>';
         tcb
-            .overrideTemplate(TestArticleDirective, html)
             .createAsync(TestArticleDirective).then(fixture => {
                 let myComponent: ArticleDirective = fixture.componentInstance;
                 expect(myComponent.article.type).toEqual("TinyMceArticle");
@@ -32,4 +32,28 @@ describe("Article Directive", () => {
             });
     });
 
+    it("renders a directive corresponding to the article type", done => {
+
+        @Component({ selector: 'noosfero-TinyMceArticle', template: "<h1>custom component</h1>" })
+        class CustomArticleComponent {
+
+        }
+
+        @Component({ selector: 'custom-article-type-test', template: html, directives: [ArticleDirective, CustomArticleComponent] })
+        class CustomArticleType {
+            article = { type: 'TinyMceArticle' };
+            profile = { name: 'profile-name' };
+            constructor() {
+            }
+        }
+        tcb
+            .createAsync(CustomArticleType).then(fixture => {
+                let myComponent: CustomArticleType = fixture.componentInstance;
+                expect(myComponent.article.type).toEqual("TinyMceArticle");
+                expect(myComponent.profile.name).toEqual("profile-name");
+                console.log(fixture.debugElement);
+                done();
+            });
+    });
+
 });
\ No newline at end of file
diff --git a/src/app/index.ts b/src/app/index.ts
index e4534ec..ba50481 100644
--- a/src/app/index.ts
+++ b/src/app/index.ts
@@ -1,4 +1,5 @@
 
+import "core-js/shim";
 import "reflect-metadata";
 import {NoosferoApp} from "./index.module";
 import {noosferoModuleConfig} from "./index.config";
diff --git a/webpack.config.js b/webpack.config.js
index 1d36066..ac01fa6 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -3,7 +3,8 @@
 var argv = require("yargs").argv;
 var path = require("path");
 var glob = require("glob");
-var webpack = require("webpack");
+
+var CommonsChunkPlugin = require("webpack/lib/optimize/CommonsChunkPlugin");
 
 var extension = ".js";
 if (argv.production) {
@@ -27,6 +28,7 @@ var webpackConfig = {
     'noosfero-specs': './src/spec.ts'
   },
 
+  plugins: [  new CommonsChunkPlugin("commons.js")],
 
   output: {
     path: path.join(__dirname, "src"),
--
libgit2 0.21.2