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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::RepositoryCache::Preloader, :use_clean_rails_redis_caching do
let(:projects) { create_list(:project, 2, :repository) }
let(:repositories) { projects.map(&:repository) }
describe '#preload' do
context 'when the values are already cached' do
before do
# Warm the cache but use a different model so they are not memoized
repos = Project.id_in(projects).order(:id).map(&:repository)
allow(repos[0].head_tree).to receive(:readme_path).and_return('README.txt')
allow(repos[1].head_tree).to receive(:readme_path).and_return('README.md')
repos.map(&:exists?)
repos.map(&:readme_path)
end
it 'prevents individual cache reads for cached methods' do
expect(Rails.cache).to receive(:read_multi).once.and_call_original
described_class.new(repositories).preload(
%i[exists? readme_path]
)
expect(Rails.cache).not_to receive(:read)
expect(Rails.cache).not_to receive(:write)
expect(repositories[0].exists?).to eq(true)
expect(repositories[0].readme_path).to eq('README.txt')
expect(repositories[1].exists?).to eq(true)
expect(repositories[1].readme_path).to eq('README.md')
end
end
context 'when values are not cached' do
it 'reads and writes from cache individually' do
described_class.new(repositories).preload(
%i[exists? has_visible_content?]
)
expect(Rails.cache).to receive(:read).exactly(4).times
expect(Rails.cache).to receive(:write).exactly(4).times
repositories.each(&:exists?)
repositories.each(&:has_visible_content?)
end
end
end
end
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