Fix #47379 - Project visibility tooltip

app/helpers/visibility_level_helper.rb

@@ -126,10 +126,9 @@ module VisibilityLevelHelper
   end
 
   def visibility_icon_description(form_model)
-    case form_model
-    when Project
+    if form_model.respond_to?(:visibility_level_allowed_as_fork?)
       project_visibility_icon_description(form_model.visibility_level)
-    when Group
+    elsif form_model.respond_to?(:visibility_level_allowed_by_sub_groups?)
       group_visibility_icon_description(form_model.visibility_level)
     end
   end

changelogs/unreleased/project-visibility-tooltip.yml

+---
+title: Fix project visibility tooltip
+merge_request: 20535
+author: Jamie Schembri
+type: fixed

spec/helpers/visibility_level_helper_spec.rb

@@ -6,6 +6,29 @@ describe VisibilityLevelHelper do
   let(:personal_snippet) { build(:personal_snippet) }
   let(:project_snippet)  { build(:project_snippet) }
 
+  describe 'visibility_icon_description' do
+    context 'used with a Project' do
+      it 'delegates projects to #project_visibility_icon_description' do
+        expect(visibility_icon_description(project))
+          .to match /project/i
+      end
+
+      context 'used with a ProjectPresenter' do
+        it 'delegates projects to #project_visibility_icon_description' do
+          expect(visibility_icon_description(project.present))
+            .to match /project/i
+        end
+      end
+
+      context 'used with a Group' do
+        it 'delegates groups to #group_visibility_icon_description' do
+          expect(visibility_icon_description(group))
+            .to match /group/i
+        end
+      end
+    end
+  end
+
   describe 'visibility_level_description' do
     context 'used with a Project' do
       it 'delegates projects to #project_visibility_level_description' do