DEV: Enable parallel system specs in GitHub actions CI (#21251)

Also skips/improves few flakey specs

.github/workflows/tests.yml

@@ -197,11 +197,11 @@ jobs:
 
       - name: Core System Tests
         if: matrix.build_type == 'system' && matrix.target == 'core'
-        run: bin/rspec spec/system --format documentation
+        run: PARALLEL_TEST_PROCESSORS=4 bin/turbo_rspec spec/system
 
       - name: Plugin System Tests
         if: matrix.build_type == 'system' && matrix.target == 'plugins'
-        run: LOAD_PLUGINS=1 bin/rspec plugins/*/spec/system --format documentation
+        run: LOAD_PLUGINS=1 PARALLEL_TEST_PROCESSORS=4 bin/turbo_rspec plugins/*/spec/system
         timeout-minutes: 30
 
       - name: Upload failed system test screenshots

plugins/chat/spec/system/archive_channel_spec.rb

@@ -123,6 +123,7 @@ RSpec.describe "Archive channel", type: :system, js: true do
 
           chat.visit_channel(channel_1)
           click_button(I18n.t("js.chat.channel_archive.retry"))
+          expect(page).to have_css(".chat-channel-archive-status a")
 
           new_window = window_opened_by { find(".chat-channel-archive-status a").click }
           within_window(new_window) do

plugins/chat/spec/system/chat_composer_spec.rb

@@ -229,7 +229,7 @@ RSpec.describe "Chat composer", type: :system, js: true do
       expect(find(".chat-emoji-picker .dc-filter-input").value).to eq("gri")
     end
 
-    it "filters with the prefilled input" do
+    xit "filters with the prefilled input" do
       chat.visit_channel(channel_1)
       find(".chat-composer__input").fill_in(with: ":fr")
 

plugins/chat/spec/system/message_notifications_with_sidebar_spec.rb

@@ -222,17 +222,28 @@ RSpec.describe "Message notifications - with sidebar", type: :system, js: true d
         end
 
         context "when messages are created" do
-          it "correctly renders notifications" do
+          xit "correctly renders notifications" do
-            visit("/")
+            using_session(:current_user) { visit("/") }
+
             using_session(:user_1) { create_message(channel: channel_1, creator: user_1) }
 
+            using_session(:current_user) do
               expect(page).to have_css(".chat-header-icon .chat-channel-unread-indicator", text: "")
               expect(page).to have_css(".sidebar-row.channel-#{channel_1.id} .unread")
+            end
 
-            using_session(:user_1) { create_message(channel: dm_channel_1, creator: user_1) }
+            using_session(:user_1) do |session|
+              create_message(channel: dm_channel_1, creator: user_1)
+              session.quit
+            end
 
+            using_session(:current_user) do
               expect(page).to have_css(".sidebar-row.channel-#{dm_channel_1.id} .icon.urgent")
-            expect(page).to have_css(".chat-header-icon .chat-channel-unread-indicator", text: "1")
+              expect(page).to have_css(
+                ".chat-header-icon .chat-channel-unread-indicator",
+                text: "1",
+              )
+            end
           end
         end
       end

spec/system/emojis/emoji_deny_list_spec.rb

@@ -39,6 +39,7 @@ describe "Emoji deny list", type: :system, js: true do
 
   describe "when using composer" do
     before do
+      SiteSetting.enable_emoji = true
       SiteSetting.emoji_deny_list = "fu|poop"
       Emoji.clear_cache && Discourse.request_refresh!
     end