Add more providers to the OAuth login integration tests.

- Added saml, authentiq, cas3, and auth0
- Crowd seems to be a special case that will be handled separately.

spec/features/oauth_login_spec.rb

@@ -7,7 +7,20 @@ feature 'OAuth Login', feature: true, js: true do
   end
 
   def provider_config(provider)
-    OpenStruct.new(name: provider.to_s, app_id: 'app_id', app_secret: 'app_secret')
+    if provider == :saml
+      OpenStruct.new(
+        name: 'saml', label: 'saml',
+        args: {
+          assertion_consumer_service_url: 'https://localhost:3443/users/auth/saml/callback',
+          idp_cert_fingerprint: '26:43:2C:47:AF:F0:6B:D0:07:9C:AD:A3:74:FE:5D:94:5F:4E:9E:52',
+          idp_sso_target_url: 'https://idp.example.com/sso/saml',
+          issuer: 'https://localhost:3443/',
+          name_identifier_format: 'urn:oasis:names:tc:SAML:2.0:nameid-format:transient'
+        }
+      )
+    else
+      OpenStruct.new(name: provider.to_s, app_id: 'app_id', app_secret: 'app_secret')
+    end
   end
 
   def stub_omniauth_config(provider)
@@ -16,7 +29,8 @@ feature 'OAuth Login', feature: true, js: true do
     Rails.application.env_config["omniauth.auth"] = OmniAuth.config.mock_auth[provider]
   end
 
-  providers = [:github, :twitter, :bitbucket, :gitlab, :google_oauth2, :facebook]
+  providers = [:github, :twitter, :bitbucket, :gitlab, :google_oauth2,
+               :facebook, :authentiq, :cas3, :auth0]
 
   before do
     OmniAuth.config.full_host = ->(request) { request['REQUEST_URI'].sub(/#{request['REQUEST_PATH']}.*/, '') }
@@ -24,12 +38,37 @@ feature 'OAuth Login', feature: true, js: true do
     messages = {
       enabled: true,
       allow_single_sign_on: providers.map(&:to_s),
+      auto_link_saml_user: true,
       providers: providers.map { |provider| provider_config(provider) }
     }
 
     allow(Gitlab.config.omniauth).to receive_messages(messages)
   end
 
+  # context 'logging in via OAuth' do
+  #   def saml_config
+
+  #   end
+  #   def stub_omniauth_config(messages)
+  #     Rails.application.env_config['devise.mapping'] = Devise.mappings[:user]
+  #     Rails.application.routes.disable_clear_and_finalize = true
+  #     Rails.application.routes.draw do
+  #       post '/users/auth/saml' => 'omniauth_callbacks#saml'
+  #     end
+  #     allow(Gitlab::OAuth::Provider).to receive_messages(providers: [:saml], config_for: saml_config)
+  #     allow(Gitlab.config.omniauth).to receive_messages(messages)
+  #     expect_any_instance_of(Object).to receive(:omniauth_authorize_path).with(:user, "saml").and_return('/users/auth/saml')
+  #   end
+  #   it 'shows 2FA prompt after OAuth login' do
+  #     stub_omniauth_config(enabled: true, auto_link_saml_user: true, allow_single_sign_on: ['saml'], providers: [saml_config])
+  #     user = create(:omniauth_user, :two_factor, extern_uid: 'my-uid', provider: 'saml')
+  #     login_via('saml', user, 'my-uid')
+  #     expect(page).to have_content('Two-Factor Authentication')
+  #     enter_code(user.current_otp)
+  #     expect(current_path).to eq root_path
+  #   end
+  # end
+
   providers.each do |provider|
     context "when the user logs in using the #{provider} provider" do
       context "when two-factor authentication is disabled" do