Adds two new scenarios to auth specs

spec/features/users_auth_spec.rb

@@ -132,6 +132,63 @@ feature 'Users' do
 
         expect_to_be_signed_in
       end
+
+      scenario 'Try to register with the username of an already existing user' do
+        create(:user, username: 'manuela', email: 'manuela@madrid.es', password: 'judgementday')
+        OmniAuth.config.add_mock(:twitter, twitter_hash_with_email)
+
+        visit '/'
+        click_link 'Register'
+        click_link 'Sign up with Twitter'
+
+        expect(current_path).to eq(finish_signup_path)
+
+        fill_in 'user_username', with: 'manuela2'
+        click_button 'Register'
+
+        expect_to_be_signed_in
+
+        click_link 'My account'
+        expect(page).to have_field('account_username', with: 'manuela2')
+
+        visit edit_user_registration_path
+        expect(page).to have_field('user_email', with: 'manuelacarmena@example.com')
+      end
+
+      scenario 'Try to register with the email of an already existing user' do
+        create(:user, username: 'peter', email: 'manuela@example.com')
+        OmniAuth.config.add_mock(:twitter, twitter_hash)
+
+        visit '/'
+        click_link 'Register'
+        click_link 'Sign up with Twitter'
+
+        expect(current_path).to eq(finish_signup_path)
+
+        fill_in 'user_email', with: 'manuela@example.com'
+        click_button 'Register'
+
+        expect(current_path).to eq(do_finish_signup_path)
+
+        fill_in 'user_email', with: 'somethingelse@example.com'
+        click_button 'Register'
+
+        expect(page).to have_content "You must confirm your account to continue"
+
+        confirm_email
+        expect(page).to have_content "Your account has been confirmed"
+
+        visit '/'
+        click_link 'Sign in'
+        click_link 'Sign in with Twitter'
+        expect_to_be_signed_in
+
+        click_link 'My account'
+        expect(page).to have_field('account_username', with: 'manuela')
+
+        visit edit_user_registration_path
+        expect(page).to have_field('user_email', with: 'somethingelse@example.com')
+      end
     end
   end