rspec-rails: ActionController::RoutingError: No route matches [...]

I’m writting an API for a pet project of mine and was running rails 3.2.9 I decided to update rails in order to avoid security problems but I suddenly ran into some problems.

I’ve been able to resolve most of them but I keep getting this and don’t know what to do with it.

I am using RSPEC to test a json API and until this upgrade everything was going just fine and all routes were working perfectly.

I’m not sure wether it’s a bug or a bad usage from me, so I’m sorry if it’s the former. Here is my code :

Routes :

Fake::Application.routes.draw do
    namespace :api do
        namespace :v1 do
            scope '/user' do
                match "signup" => "registrations#create", :via => :post
                match "delete" => "registrations#destroy", :via => :delete

                match "login"  => "sessions#create", :via => :post
                match "logout" => "sessions#destroy", :via => :delete
            end
        end
    end
end

Spec :

require 'spec_helper'

describe Api::V1::SessionsController do
    before do
        @user = {
            :email => Faker::Internet::email,
            :pseudo => Faker::Internet::user_name,
            :password => Faker::Lorem::words(2).join
        }
        user = User.create @user
    end

    context 'should login in' do

        it 'should be ok ' do
            post '/api/v1/user/login', :user => @user
            JSON.parse(response.body)["success"].should == true
        end

        it 'should fail without credentials' do
            post '/api/v1/user/login', {}
            JSON.parse(response.body)["success"].should == false
        end
    end
end

And the result :

± rspec spec/controllers/sessions_controller_spec.rb                                                                                                                    5:21:10 PM
Rack::File headers parameter replaces cache_control after Rack 1.5.
FF

Failures:

  1) Api::V1::SessionsController should login in should be ok with auth_token
     Failure/Error: post '/api/v1/user/login', :user => @user
     ActionController::RoutingError:
       No route matches {:user=>{:email=>"meghan.breitenberg@bodehansen.org", :pseudo=>"linwood_gislason", :password=>"repellendusaliquid"}, :controller=>"api/v1/sessions", :action=>"/api/v1/user/login"}
     # ./spec/controllers/sessions_controller_spec.rb:17:in `block (3 levels) in <top (required)>'

  2) Api::V1::SessionsController should login in should fail without credentials
     Failure/Error: post '/api/v1/user/login', {}
     ActionController::RoutingError:
       No route matches {:controller=>"api/v1/sessions", :action=>"/api/v1/user/login"}
     # ./spec/controllers/sessions_controller_spec.rb:22:in `block (3 levels) in <top (required)>'

Finished in 0.50905 seconds
2 examples, 2 failures

Failed examples:

rspec ./spec/controllers/sessions_controller_spec.rb:15 # Api::V1::SessionsController should login in should be ok with auth_token
rspec ./spec/controllers/sessions_controller_spec.rb:21 # Api::V1::SessionsController should login in should fail without credentials

Edit :

Rails version : 3.2.11 Rspec version : 2.12.2 Ruby version : ruby 1.9.3p0