Store merge request ref_fetched status in the database

Closes #34052

2 files changed, 39 insertions, 1 deletions

diff --git a/spec/lib/gitlab/import_export/fork_spec.rb b/spec/lib/gitlab/import_export/fork_spec.rb
index 42f3fc59f04..70796781532 100644
--- a/spec/lib/gitlab/import_export/fork_spec.rb
+++ b/spec/lib/gitlab/import_export/fork_spec.rb
@@ -44,6 +44,8 @@ describe 'forked project import', services: true do
   end
 
   it 'can access the MR' do
-    expect(project.merge_requests.first.ensure_ref_fetched.first).to include('refs/merge-requests/1/head')
+    project.merge_requests.first.ensure_ref_fetched
+
+    expect(project.repository.ref_exists?('refs/merge-requests/1/head')).to be_truthy
   end
 end
diff --git a/spec/models/merge_request_spec.rb b/spec/models/merge_request_spec.rb
index 1240c9745e2..bb5273074a2 100644
--- a/spec/models/merge_request_spec.rb
+++ b/spec/models/merge_request_spec.rb
@@ -1574,4 +1574,40 @@ describe MergeRequest, models: true do
       end
     end
   end
+
+  describe '#fetch_ref' do
+    it 'sets "ref_fetched" flag to true' do
+      subject.update!(ref_fetched: nil)
+
+      subject.fetch_ref
+
+      expect(subject.reload.ref_fetched).to be_truthy
+    end
+  end
+
+  describe '#ref_fetched?' do
+    it 'does not perform git operation when value is cached' do
+      subject.ref_fetched = true
+
+      expect_any_instance_of(Repository).not_to receive(:ref_exists?)
+      expect(subject.ref_fetched?).to be_truthy
+    end
+
+    it 'caches the value when ref exists but value is not cached' do
+      subject.update!(ref_fetched: nil)
+      allow_any_instance_of(Repository).to receive(:ref_exists?)
+        .and_return(true)
+
+      expect(subject.ref_fetched?).to be_truthy
+      expect(subject.reload.ref_fetched).to be_truthy
+    end
+
+    it 'returns false when ref does not exist' do
+      subject.update!(ref_fetched: nil)
+      allow_any_instance_of(Repository).to receive(:ref_exists?)
+        .and_return(false)
+
+      expect(subject.ref_fetched?).to be_falsey
+    end
+  end
 end