require "spec_helper"

describe WorkIndexer, work_search: true do
  describe "#index_documents" do
    let(:work) { create(:work) }

    context "when a work in the batch has no stat_counter" do
      let(:indexer) { WorkIndexer.new([work.id]) }

      before { work.stat_counter.delete }

      it "doesn't error" do
        expect { indexer.index_documents }.not_to raise_exception
      end
    end

    context "when there are no IDs in the batch" do
      let(:indexer) { WorkIndexer.new([]) }

      it "returns nil" do
        expect(indexer.index_documents).to be_nil
      end
    end

    context "with multiple works in a batch", :n_plus_one do
      let(:relationships) do
        rel1 = create(:canonical_relationship, name: "aa/bb")
        syn = create(:relationship, name: "a/b", merger: rel1)
        rel2 = create(:relationship, name: "test")
        [syn, rel2] # so that Work#otp doesn't take an early return
      end
      populate { |n| create_list(:work, n, relationships: relationships) }

      it "generates a constant number of database queries" do
        expect do
          WorkIndexer.new(Work.ids).index_documents
        end.to perform_constant_number_of_queries
      end
    end
  end
end