exec: rails generate controller Sessions --no-test-framework
exec: rails generate integration_test authentication_pages
add testcase for signin page
add routes for signin, signout
fake it
add testcases for invalid info
add testcases for valid information signin
implement signin page
fix
fake it
implement faild signin
add testcase for moved page
fix flash message
finish implementation Sessions#create
include SessionHelper at ApplicationController
add testcase for keep session
create migration file for remember_token of User
exec: rake db:migrate
add testcase
add User.new_remember_token, User.encrypt, User#create_remember_token