1 files changed, 34 insertions, 0 deletions
diff --git a/spec/lib/gitlab/pagination/keyset/in_operator_optimization/strategies/order_values_loader_strategy_spec.rb b/spec/lib/gitlab/pagination/keyset/in_operator_optimization/strategies/order_values_loader_strategy_spec.rb
new file mode 100644
index 00000000000..fe95d5406dd
--- /dev/null
+++ b/spec/lib/gitlab/pagination/keyset/in_operator_optimization/strategies/order_values_loader_strategy_spec.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::Pagination::Keyset::InOperatorOptimization::Strategies::OrderValuesLoaderStrategy do
+  let(:model) { Project }
+
+  let(:keyset_scope) do
+    scope, _ = Gitlab::Pagination::Keyset::SimpleOrderBuilder.build(
+      Project.order(:created_at, :id)
+    )
+
+    scope
+  end
+
+  let(:keyset_order) do
+    Gitlab::Pagination::Keyset::Order.extract_keyset_order_object(keyset_scope)
+  end
+
+  let(:order_by_columns) do
+    Gitlab::Pagination::Keyset::InOperatorOptimization::OrderByColumns.new(keyset_order.column_definitions, model.arel_table)
+  end
+
+  subject(:strategy) { described_class.new(model, order_by_columns) }
+
+  describe '#initializer_columns' do
+    it 'returns NULLs for each ORDER BY columns' do
+      expect(strategy.initializer_columns).to eq([
+        'NULL::timestamp without time zone AS created_at',
+        'NULL::integer AS id'
+      ])
+    end
+  end
+end