require 'spec_helper' describe CacheableAttributes do let(:minimal_test_class) do Class.new do include ActiveModel::Model extend ActiveModel::Callbacks define_model_callbacks :commit include CacheableAttributes def self.name 'TestClass' end def self.first @_first ||= new('foo' => 'a') end def self.last @_last ||= new('foo' => 'a', 'bar' => 'b') end def self.column_names %w[foo bar baz] end attr_accessor :attributes def initialize(attrs = {}, *) @attributes = attrs end end end shared_context 'with defaults' do before do minimal_test_class.define_singleton_method(:defaults) do { foo: 'a', bar: 'b', baz: 'c' } end end end describe '.current_without_cache' do it 'defaults to last' do expect(minimal_test_class.current_without_cache).to eq(minimal_test_class.last) end it 'can be overridden' do minimal_test_class.define_singleton_method(:current_without_cache) do first end expect(minimal_test_class.current_without_cache).to eq(minimal_test_class.first) end end describe '.cache_key' do it 'excludes cache attributes' do expect(minimal_test_class.cache_key).to eq("TestClass:#{Gitlab::VERSION}:#{Rails.version}") end end describe '.defaults' do it 'defaults to {}' do expect(minimal_test_class.defaults).to eq({}) end context 'with defaults defined' do include_context 'with defaults' it 'can be overridden' do expect(minimal_test_class.defaults).to eq({ foo: 'a', bar: 'b', baz: 'c' }) end end end describe '.build_from_defaults' do include_context 'with defaults' context 'without any attributes given' do it 'intializes a new object with the defaults' do expect(minimal_test_class.build_from_defaults.attributes).to eq(minimal_test_class.defaults.stringify_keys) end end context 'with attributes given' do it 'intializes a new object with the given attributes merged into the defaults' do expect(minimal_test_class.build_from_defaults(foo: 'd').attributes['foo']).to eq('d') end end describe 'edge cases on concrete implementations' do describe '.build_from_defaults' do context 'without any attributes given' do it 'intializes all attributes even if they are nil' do record = ApplicationSetting.build_from_defaults expect(record).not_to be_persisted expect(record.sign_in_text).to be_nil end end end end end describe '.current', :use_clean_rails_memory_store_caching do context 'redis unavailable' do before do allow(minimal_test_class).to receive(:last).and_return(:last) expect(Rails.cache).to receive(:read).with(minimal_test_class.cache_key).and_raise(Redis::BaseError) end context 'in production environment' do before do expect(Rails.env).to receive(:production?).and_return(true) end it 'returns an uncached record and logs a warning' do expect(Rails.logger).to receive(:warn).with("Cached record for TestClass couldn't be loaded, falling back to uncached record: Redis::BaseError") expect(minimal_test_class.current).to eq(:last) end end context 'in other environments' do before do expect(Rails.env).to receive(:production?).and_return(false) end it 'returns an uncached record and logs a warning' do expect(Rails.logger).not_to receive(:warn) expect { minimal_test_class.current }.to raise_error(Redis::BaseError) end end end context 'when a record is not yet present' do it 'does not cache nil object' do # when missing settings a nil object is returned, but not cached allow(ApplicationSetting).to receive(:current_without_cache).twice.and_return(nil) expect(ApplicationSetting.current).to be_nil expect(Rails.cache.exist?(ApplicationSetting.cache_key)).to be(false) end it 'caches non-nil object' do create(:application_setting) expect(ApplicationSetting.current).to eq(ApplicationSetting.last) expect(Rails.cache.exist?(ApplicationSetting.cache_key)).to be(true) # subsequent calls retrieve the record from the cache last_record = ApplicationSetting.last expect(ApplicationSetting).not_to receive(:current_without_cache) expect(ApplicationSetting.current.attributes).to eq(last_record.attributes) end end describe 'edge cases' do describe 'caching behavior', :use_clean_rails_memory_store_caching do it 'retrieves upload fields properly' do ar_record = create(:appearance, :with_logo) ar_record.cache! cache_record = Appearance.current expect(cache_record).to be_persisted expect(cache_record.logo).to be_an(AttachmentUploader) expect(cache_record.logo.url).to end_with('/dk.png') end it 'retrieves markdown fields properly' do ar_record = create(:appearance, description: '**Hello**') ar_record.cache! cache_record = Appearance.current expect(cache_record.description).to eq('**Hello**') expect(cache_record.description_html).to eq('
Hello
') end end end it 'uses RequestStore in addition to Rails.cache', :request_store do # Warm up the cache create(:application_setting).cache! expect(Rails.cache).to receive(:read).with(ApplicationSetting.cache_key).once.and_call_original 2.times { ApplicationSetting.current } end end describe '.cached', :use_clean_rails_memory_store_caching do context 'when cache is cold' do it 'returns nil' do expect(minimal_test_class.cached).to be_nil end end context 'when cached is warm' do before do # Warm up the cache create(:appearance).cache! end it 'retrieves the record from cache' do expect(ActiveRecord::QueryRecorder.new { Appearance.cached }.count).to eq(0) expect(Appearance.cached).to eq(Appearance.current_without_cache) end end end describe '#cache!', :use_clean_rails_memory_store_caching do let(:record) { create(:appearance) } it 'caches the attributes' do record.cache! expect(Rails.cache.read(Appearance.cache_key)).to eq(record) end describe 'edge cases' do let(:record) { create(:appearance) } it 'caches the attributes' do record.cache! expect(Rails.cache.read(Appearance.cache_key)).to eq(record) end end end end