require 'spec_helper' describe ManualInverseAssociation do let(:model) do Class.new(MergeRequest) do belongs_to :manual_association, class_name: 'MergeRequestDiff', foreign_key: :latest_merge_request_diff_id manual_inverse_association :manual_association, :merge_request end end before do stub_const("#{described_class}::Model", model) end let(:instance) { create(:merge_request).becomes(model) } describe '.manual_inverse_association' do context 'when the relation exists' do before do instance.create_merge_request_diff instance.reload end it 'loads the relation' do expect(instance.manual_association).to be_an_instance_of(MergeRequestDiff) end it 'does not perform extra queries after loading' do instance.manual_association expect { instance.manual_association.merge_request } .not_to exceed_query_limit(0) end it 'allows reloading the relation' do query_count = ActiveRecord::QueryRecorder.new do instance.manual_association instance.reload_manual_association end.count expect(query_count).to eq(2) end end context 'when the relation does not return a value' do it 'does not try to set an inverse' do expect(instance.manual_association).to be_nil end end end end