add first integration test

spec/support/session_helper.rb

@@ -0,0 +1,15 @@
+
+module SessionHelper
+
+  def login(nick=nil, password=nil)
+    visit login_path
+    if nick.nil?
+      user = FactoryGirl.create :user
+      nick, password = user.nick, user.password
+    end
+    fill_in 'nick', :with => nick
+    fill_in 'password', :with => password
+    find('input[type=submit]').click
+  end
+
+end