Add a test

Author: bsatarnejad

test/components/primer/open_project/filterable_tree_view_test.rb

@@ -308,6 +308,28 @@ def test_src_attribute_is_absent_when_src_is_not_provided
         assert_selector "filterable-tree-view:not([src])"
       end
 
+      def test_uses_a_skeleton_as_the_default_loading_indicator
+        render_inline(Primer::OpenProject::FilterableTreeView.new(src: "/my/tree"))
+
+        assert_selector ".FilterableTreeViewLoadingIndicator .TreeViewSkeletonItemContainerStyle", count: 8
+      end
+
+      def test_loading_indicator_can_be_overridden
+        render_inline(Primer::OpenProject::FilterableTreeView.new(src: "/my/tree")) do |tree|
+          tree.with_loading_indicator do
+            '<span data-test-selector="custom-loading-indicator">Loading</span>'.html_safe
+          end
+        end
+
+        assert_selector ".FilterableTreeViewLoadingIndicator [data-test-selector='custom-loading-indicator']"
+      end
+
+      def test_custom_loading_indicator_preview
+        render_preview(:async_custom_loading_indicator)
+
+        assert_selector ".FilterableTreeViewLoadingIndicator svg.anim-rotate"
+      end
+
       def test_include_sub_items_checkbox_is_excluded_from_form_in_non_async_mode
         render_preview(:form_input)