require 'spec_helper' require Rails.root.join('db', 'post_migrate', '20170815060945_remove_duplicate_mr_events.rb') describe RemoveDuplicateMrEvents, :delete do let(:migration) { described_class.new } describe '#up' do let(:user) { create(:user) } let(:merge_requests) { create_list(:merge_request, 2) } let(:issue) { create(:issue) } let!(:events) do [ create(:event, :created, author: user, target: merge_requests.first), create(:event, :created, author: user, target: merge_requests.first), create(:event, :updated, author: user, target: merge_requests.first), create(:event, :created, author: user, target: merge_requests.second), create(:event, :created, author: user, target: issue), create(:event, :created, author: user, target: issue) ] end it 'removes duplicated merge request create records' do expect { migration.up }.to change { Event.count }.from(6).to(5) end end end