1 files changed, 26 insertions, 0 deletions
diff --git a/spec/controllers/projects_controller_spec.rb b/spec/controllers/projects_controller_spec.rb
index fc3efc8e805..6c00dad8bb7 100644
--- a/spec/controllers/projects_controller_spec.rb
+++ b/spec/controllers/projects_controller_spec.rb
@@ -1020,6 +1020,32 @@ describe ProjectsController do
         expect(json_response['body']).to include(expanded_path)
       end
     end
+
+    context 'when path and ref parameters are provided' do
+      let(:project_with_repo) { create(:project, :repository) }
+      let(:preview_markdown_params) do
+        {
+          namespace_id: project_with_repo.namespace,
+          id: project_with_repo,
+          text: "![](./logo-white.png)\n",
+          ref: 'other_branch',
+          path: 'files/images/README.md'
+        }
+      end
+
+      before do
+        project_with_repo.add_maintainer(user)
+        project_with_repo.repository.create_branch('other_branch')
+      end
+
+      it 'renders JSON body with image links expanded' do
+        expanded_path = "/#{project_with_repo.full_path}/-/raw/other_branch/files/images/logo-white.png"
+
+        post :preview_markdown, params: preview_markdown_params
+
+        expect(json_response['body']).to include(expanded_path)
+      end
+    end
   end
 
   describe '#ensure_canonical_path' do