adds a test

spec/features/sessions_spec.rb

@@ -0,0 +1,23 @@
+require 'rails_helper'
+
+feature 'Sessions' do
+
+  scenario 'Staying in the same page after doing login/logout' do
+    user = create(:user, sign_in_count: 10)
+    debate = create(:debate)
+
+    visit debate_path(debate)
+
+    login_through_form_as(user)
+
+    expect(page).to have_content('You have been signed in successfully')
+    expect(current_path).to eq(debate_path(debate))
+
+    click_link 'Sign out'
+
+    expect(page).to have_content('You have been signed out successfully')
+    expect(current_path).to eq(debate_path(debate))
+  end
+
+end
+