UsersConroller#create spec

gistfile1.rb

    describe 'POST create' do
      context 'with valid params' do
        before(:each) { User.any_instance.stub!(:valid?).and_return(true) }
        it 'creates new user and redirects to the home page with a notice' do
          post :create, :user => Factory.attributes_for(:user, :username => 'dude')
          assigns[:user].should be_persisted
          # assigns[:user].username.should eq('dude')  # Unnecessary, model tests should cover this
          flash[:notice].should_not be_blank # be_blank instead of be_nil
          response.should redirect_to(root_path) # path here, not url
        end

        it 'delivers the activation email' do
          user = Factory.build(:user)
          User.stub!(:new).and_return(user)
          user.should_receive(:deliver_activation_instructions!)
          post :create
        end
      end

      context 'with invalid params' do
        it 'fails to create the user and redirects to the form again' do
          post :create, :user => Factory.attributes_for(:user, :username => nil)
          flash[:error].should_not be_blank
          response.should redirect_to(new_user_path)
        end
      end
    end