gistfile1.rb

describe "Users" do
  describe "Sign up" do
    describe "with invalid data" do
      it "should not create user" do
        lambda do
          visit signup_path
          fill_in "Name",              :with => ""
          fill_in "Email",             :with => ""
          fill_in "Password",          :with => ""
          fill_in "Confirm password",  :with => ""
          click_button

          response.should render_template('new')
          response.should have_selector("div.error")
        end.should_not change(User, :count)
      end
    end