Fixes the diff changes buttons from toggling when scrollingchanges-bar-sticky-fix

Closes #36698

1 files changed, 11 insertions, 0 deletions

diff --git a/spec/javascripts/merge_request_tabs_spec.js b/spec/javascripts/merge_request_tabs_spec.js
index dc40244c20e..8830a2d29e5 100644
--- a/spec/javascripts/merge_request_tabs_spec.js
+++ b/spec/javascripts/merge_request_tabs_spec.js
@@ -295,6 +295,17 @@ import 'vendor/jquery.scrollTo';
         this.class.loadDiff('/foo/bar/merge_requests/1/diffs');
       });
 
+      it('triggers scroll event when diff already loaded', function () {
+        spyOn(document, 'dispatchEvent');
+
+        this.class.diffsLoaded = true;
+        this.class.loadDiff('/foo/bar/merge_requests/1/diffs');
+
+        expect(
+          document.dispatchEvent,
+        ).toHaveBeenCalledWith(new CustomEvent('scroll'));
+      });
+
       describe('with inline diff', () => {
         let noteId;
         let noteLineNumId;