Do not test PAM authentication by default (#9027)

* Do not test PAM authentication by default

* Disable PAM tests if PAM is not enabled

.env.test

@@ -3,7 +3,3 @@ NODE_ENV=test
 # Federation
 LOCAL_DOMAIN=cb6e6126.ngrok.io
 LOCAL_HTTPS=true
-# test pam authentication
-PAM_ENABLED=true
-PAM_DEFAULT_SERVICE=pam_test
-PAM_CONTROLLED_SERVICE=pam_test_controlled

spec/controllers/auth/sessions_controller_spec.rb

@@ -55,6 +55,7 @@ RSpec.describe Auth::SessionsController, type: :controller do
       request.env['devise.mapping'] = Devise.mappings[:user]
     end
 
+    if ENV['PAM_ENABLED'] == 'true'
       context 'using PAM authentication' do
         context 'using a valid password' do
           before do
@@ -105,6 +106,7 @@ RSpec.describe Auth::SessionsController, type: :controller do
           end
         end
       end
+    end
 
     context 'using password authentication' do
       let(:user) { Fabricate(:user, email: 'foo@bar.com', password: 'abcdefgh') }