gitlab-org--gitlab-foss/spec/models/preloaders/labels_preloader_spec.rb

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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Preloaders::LabelsPreloader do
let_it_be(:user) { create(:user) }
shared_examples 'an efficient database query' do
let(:subscriptions) { labels.each { |l| create(:subscription, subscribable: l, project: l.project, user: user) }}
it 'does not make n+1 queries' do
first_label = labels_with_preloaded_data.first
clean_labels = labels_with_preloaded_data
expect { access_data(clean_labels) }.to issue_same_number_of_queries_as { access_data([first_label]) }
end
end
context 'project labels' do
let_it_be(:projects) { create_list(:project, 3, :public, :repository) }
let_it_be(:labels) { projects.each { |p| create(:label, project: p) } }
it_behaves_like 'an efficient database query'
end
context 'group labels' do
let_it_be(:groups) { create_list(:group, 3) }
let_it_be(:labels) { groups.each { |g| create(:group_label, group: g) } }
it_behaves_like 'an efficient database query'
end
private
def labels_with_preloaded_data
l = Label.where(id: labels.map(&:id))
described_class.new(l, user).preload_all
l
end
def access_data(labels)
labels.each do |label|
if label.is_a?(ProjectLabel)
label.project.project_feature
label.lazy_subscription(user, label.project)
elsif label.is_a?(GroupLabel)
label.group.route
label.lazy_subscription(user)
end
end
end
end