Add some specs for forked project visibility_level cases

spec/models/project_spec.rb

@@ -552,4 +552,28 @@ describe Project, models: true do
       end
     end
   end
+
+  describe '#visibility_level_allowed?' do
+    let(:project) { create :project, visibility_level: Gitlab::VisibilityLevel::INTERNAL }
+
+    context 'when checking on non-forked project' do
+      it { expect(project.visibility_level_allowed?(Gitlab::VisibilityLevel::PRIVATE)).to be_truthy }
+      it { expect(project.visibility_level_allowed?(Gitlab::VisibilityLevel::INTERNAL)).to be_truthy }
+      it { expect(project.visibility_level_allowed?(Gitlab::VisibilityLevel::PUBLIC)).to be_truthy }
+    end
+
+    context 'when checking on forked project' do
+      let(:forked_project) { create :forked_project_with_submodules }
+
+      before do
+        forked_project.build_forked_project_link(forked_to_project_id: forked_project.id, forked_from_project_id: project.id)
+        forked_project.save
+      end
+
+      it { expect(forked_project.visibility_level_allowed?(Gitlab::VisibilityLevel::PRIVATE)).to be_truthy }
+      it { expect(forked_project.visibility_level_allowed?(Gitlab::VisibilityLevel::INTERNAL)).to be_truthy }
+      it { expect(forked_project.visibility_level_allowed?(Gitlab::VisibilityLevel::PUBLIC)).to be_falsey }
+    end
+
+  end
 end

spec/services/projects/update_service_spec.rb

@@ -100,6 +100,45 @@ describe Projects::UpdateService, services: true do
     end
   end
 
+  describe :visibility_level do
+    let(:user) { create :user, admin: true }
+    let(:project) { create :project, visibility_level: Gitlab::VisibilityLevel::INTERNAL }
+    let(:forked_project) { create :forked_project_with_submodules, visibility_level: Gitlab::VisibilityLevel::INTERNAL }
+    let(:opts) { {} }
+
+    before do
+      forked_project.build_forked_project_link(forked_to_project_id: forked_project.id, forked_from_project_id: project.id)
+      forked_project.save
+
+      @created_internal = project.internal?
+      @fork_created_internal = forked_project.internal?
+    end
+
+    context 'should update forks visibility level when parent set to more restrictive' do
+      before do
+        opts.merge!(visibility_level: Gitlab::VisibilityLevel::PRIVATE)
+        update_project(project, user, opts).inspect
+      end
+
+      it { expect(@created_internal).to be_truthy }
+      it { expect(@fork_created_internal).to be_truthy }
+      it { expect(project.private?).to be_truthy }
+      it { expect(project.forks.first.private?).to be_truthy }
+    end
+
+    context 'should not update forks visibility level when parent set to less restrictive' do
+      before do
+        opts.merge!(visibility_level: Gitlab::VisibilityLevel::PUBLIC)
+        update_project(project, user, opts).inspect
+      end
+
+      it { expect(@created_internal).to be_truthy }
+      it { expect(@fork_created_internal).to be_truthy }
+      it { expect(project.public?).to be_truthy }
+      it { expect(project.forks.first.internal?).to be_truthy }
+    end
+  end
+
   def update_project(project, user, opts)
     Projects::UpdateService.new(project, user, opts).execute
   end