1 files changed, 61 insertions, 0 deletions
diff --git a/spec/lib/gitlab/middleware/query_analyzer_spec.rb b/spec/lib/gitlab/middleware/query_analyzer_spec.rb
new file mode 100644
index 00000000000..5ebe6a92da6
--- /dev/null
+++ b/spec/lib/gitlab/middleware/query_analyzer_spec.rb
@@ -0,0 +1,61 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Middleware::QueryAnalyzer, query_analyzers: false do
+  describe 'the PreventCrossDatabaseModification' do
+    describe '#call' do
+      let(:app) { double(:app) }
+      let(:middleware) { described_class.new(app) }
+      let(:env) { {} }
+
+      subject { middleware.call(env) }
+
+      context 'when there is a cross modification' do
+        before do
+          allow(app).to receive(:call) do
+            Project.transaction do
+              Project.where(id: -1).update_all(id: -1)
+              ::Ci::Pipeline.where(id: -1).update_all(id: -1)
+            end
+          end
+        end
+
+        it 'detects cross modifications and tracks exception' do
+          expect(::Gitlab::ErrorTracking).to receive(:track_and_raise_for_dev_exception)
+
+          expect { subject }.not_to raise_error
+        end
+
+        context 'when the detect_cross_database_modification is disabled' do
+          before do
+            stub_feature_flags(detect_cross_database_modification: false)
+          end
+
+          it 'does not detect cross modifications' do
+            expect(::Gitlab::ErrorTracking).not_to receive(:track_and_raise_for_dev_exception)
+
+            subject
+          end
+        end
+      end
+
+      context 'when there is no cross modification' do
+        before do
+          allow(app).to receive(:call) do
+            Project.transaction do
+              Project.where(id: -1).update_all(id: -1)
+              Namespace.where(id: -1).update_all(id: -1)
+            end
+          end
+        end
+
+        it 'does not log anything' do
+          expect(::Gitlab::ErrorTracking).not_to receive(:track_and_raise_for_dev_exception)
+
+          subject
+        end
+      end
+    end
+  end
+end