Post vs Post_via_redirect in Rails 4 not behaving in expected way -

i'm stumped in particular part of m. hartl's rails guide (ch 8) integration testing. trying validate user login/logout, here's testing code(not working):

##doesnt work test "should display user logout behavior"   login_path   assert_template 'sessions/new'   assert_select "a[href=?]", signup_path, count: 3   assert_select "a[href=?]", login_path, count: 2   post_via_redirect login_path, session: {email: @user.email,      password: "password"}   assert_redirected_to @user   assert logged_in?   assert_select "a[href=?]", signup_path, count: 0   assert_select "a[href=?]", login_path, count: 0   delete logout_path   follow_redirect!   assert_template 'static_pages/home'   assert_not logged_in?   assert_select "a[href=?]", login_path, count: 2   assert_select "a[href=?]", signup_path, count: 3 end 

however, making these modifications make work:

#works test "should display user logout behavior"   login_path   assert_template 'sessions/new'   assert_select "a[href=?]", signup_path, count: 3   assert_select "a[href=?]", login_path, count: 2   post login_path, session: {email: @user.email,      password: "password"}   assert_redirected_to @user   follow_redirect!   assert logged_in?   assert_select "a[href=?]", signup_path, count: 0   assert_select "a[href=?]", login_path, count: 0   delete logout_path   follow_redirect!   assert_template 'static_pages/home'   assert_not logged_in?   assert_select "a[href=?]", login_path, count: 2   assert_select "a[href=?]", signup_path, count: 3 end 

the part fails assert_redirected_to. have checked via response.body , gets rendered expected...

essentially difference post v. post_via_redirect. looking @ source code of 'via_redirect', believe should work doing following redirects until there none left. in addition, have no further redirects i'm testing for:

def create     user = user.find_by email: params[:session][:email]     if user && user.authenticate(params[:session][:password].downcase)       log_in(user)       redirect_to user_path(user.id)     else       flash.now[:danger] = "invalid username/password combination"       render 'new'       end   end    def destroy     reset_session     redirect_to root_path   end 

from standpoint, here's questions:

• do redirection options lost whenever call via_redirect, , testing 'assert_redirected_to @user' fails?

• is there 1 more jump i'm making when running via_redirect? see follow_redirect! doing running get(response.location).

many thanks!

i suppose issue within

 assert_redirected_to @user 

this assertions checks response headers of previous action, fine. if follow redirect previous redirect response gone , have response after redirect.

as integration test there no need check every step of it. because if redirect fails next assertion

assert logged_in?

will fail.

so if using post_via_redirect check applies next page.