# frozen_string_literal: true require 'spec_helper' describe CacheMarkdownField, :clean_gitlab_redis_cache do let(:ar_class) do Class.new(ActiveRecord::Base) do self.table_name = 'issues' include CacheMarkdownField cache_markdown_field :title, pipeline: :single_line cache_markdown_field :description end end let(:other_class) do Class.new do include CacheMarkdownField def initialize(args = {}) @title, @description, @cached_markdown_version = args[:title], args[:description], args[:cached_markdown_version] @title_html, @description_html = args[:title_html], args[:description_html] @author, @project = args[:author], args[:project] end attr_accessor :title, :description, :cached_markdown_version cache_markdown_field :title, pipeline: :single_line cache_markdown_field :description def cache_key "cache-key" end end end let(:markdown) { '`Foo`' } let(:html) { '

Foo

' } let(:updated_markdown) { '`Bar`' } let(:updated_html) { '

Bar

' } let(:cache_version) { Gitlab::MarkdownCache::CACHE_COMMONMARK_VERSION << 16 } def thing_subclass(klass, extra_attribute) Class.new(klass) { attr_accessor(extra_attribute) } end shared_examples 'a class with cached markdown fields' do describe '#cached_html_up_to_date?' do let(:thing) { klass.new(title: markdown, title_html: html, cached_markdown_version: cache_version) } subject { thing.cached_html_up_to_date?(:title) } it 'returns false when the version is absent' do thing.cached_markdown_version = nil is_expected.to be_falsy end it 'returns false when the version is too early' do thing.cached_markdown_version -= 1 is_expected.to be_falsy end it 'returns false when the version is too late' do thing.cached_markdown_version += 1 is_expected.to be_falsy end it 'returns false when the local version was bumped' do allow(Gitlab::CurrentSettings.current_application_settings).to receive(:local_markdown_version).and_return(2) thing.cached_markdown_version = cache_version is_expected.to be_falsy end it 'returns true when the local version is default' do thing.cached_markdown_version = cache_version is_expected.to be_truthy end it 'returns true when the cached version is just right' do allow(Gitlab::CurrentSettings.current_application_settings).to receive(:local_markdown_version).and_return(2) thing.cached_markdown_version = cache_version + 2 is_expected.to be_truthy end end describe '#latest_cached_markdown_version' do let(:thing) { klass.new } subject { thing.latest_cached_markdown_version } it 'returns default version' do thing.cached_markdown_version = nil is_expected.to eq(cache_version) end end describe '#refresh_markdown_cache' do let(:thing) { klass.new(description: markdown, description_html: html, cached_markdown_version: cache_version) } before do thing.description = updated_markdown end it 'fills all html fields' do thing.refresh_markdown_cache expect(thing.description_html).to eq(updated_html) end it 'does not save the result' do expect(thing).not_to receive(:save_markdown) thing.refresh_markdown_cache end it 'updates the markdown cache version' do thing.cached_markdown_version = nil thing.refresh_markdown_cache expect(thing.cached_markdown_version).to eq(cache_version) end end describe '#refresh_markdown_cache!' do let(:thing) { klass.new(description: markdown, description_html: html, cached_markdown_version: cache_version) } before do thing.description = updated_markdown end it 'fills all html fields' do thing.refresh_markdown_cache! expect(thing.description_html).to eq(updated_html) end it 'saves the changes' do expect(thing) .to receive(:save_markdown) .with("description_html" => updated_html, "title_html" => "", "cached_markdown_version" => cache_version) thing.refresh_markdown_cache! end end describe '#banzai_render_context' do let(:thing) { klass.new(title: markdown, title_html: html, cached_markdown_version: cache_version) } subject(:context) { thing.banzai_render_context(:title) } it 'sets project to nil if the object lacks a project' do is_expected.to have_key(:project) expect(context[:project]).to be_nil end it 'excludes author if the object lacks an author' do is_expected.not_to have_key(:author) end it 'raises if the context for an unrecognised field is requested' do expect { thing.banzai_render_context(:not_found) }.to raise_error(ArgumentError) end it 'includes the pipeline' do title_context = thing.banzai_render_context(:title) expect(title_context[:pipeline]).to eq(:single_line) end it 'returns copies of the context template' do template = thing.cached_markdown_fields[:description] copy = thing.banzai_render_context(:description) expect(copy).not_to be(template) end context 'with a project' do let(:project) { build(:project, group: create(:group)) } let(:thing) { thing_subclass(klass, :project).new(title: markdown, title_html: html, project: project) } it 'sets the project in the context' do is_expected.to have_key(:project) expect(context[:project]).to eq(project) end end context 'with an author' do let(:thing) { thing_subclass(klass, :author).new(title: markdown, title_html: html, author: :author_value) } it 'sets the author in the context' do is_expected.to have_key(:author) expect(context[:author]).to eq(:author_value) end end end describe '#updated_cached_html_for' do let(:thing) { klass.new(description: markdown, description_html: html, cached_markdown_version: cache_version) } context 'when the markdown cache is outdated' do before do thing.cached_markdown_version += 1 end it 'calls #refresh_markdown_cache!' do expect(thing).to receive(:refresh_markdown_cache!) expect(thing.updated_cached_html_for(:description)).to eq(html) end end context 'when the markdown field does not exist' do it 'returns nil' do expect(thing.updated_cached_html_for(:something)).to eq(nil) end end context 'when the markdown cache is up to date' do before do thing.try(:save) end it 'does not call #refresh_markdown_cache!' do expect(thing).not_to receive(:refresh_markdown_cache!) expect(thing.updated_cached_html_for(:description)).to eq(html) end end end describe '#rendered_field_content' do let(:thing) { klass.new(description: markdown, description_html: nil, cached_markdown_version: cache_version) } context 'when a field can be cached' do it 'returns the html' do thing.description = updated_markdown expect(thing.rendered_field_content(:description)).to eq updated_html end end context 'when a field cannot be cached' do it 'returns nil' do allow(thing).to receive(:can_cache_field?).with(:description).and_return false expect(thing.rendered_field_content(:description)).to eq nil end end end end context 'for Active record classes' do let(:klass) { ar_class } it_behaves_like 'a class with cached markdown fields' describe '#attribute_invalidated?' do let(:thing) { klass.create(description: markdown, description_html: html, cached_markdown_version: cache_version) } it 'returns true when cached_markdown_version is different' do thing.cached_markdown_version += 1 expect(thing.attribute_invalidated?(:description_html)).to eq(true) end it 'returns true when markdown is changed' do thing.description = updated_markdown expect(thing.attribute_invalidated?(:description_html)).to eq(true) end it 'returns true when both markdown and HTML are changed' do thing.description = updated_markdown thing.description_html = updated_html expect(thing.attribute_invalidated?(:description_html)).to eq(true) end it 'returns false when there are no changes' do expect(thing.attribute_invalidated?(:description_html)).to eq(false) end end context 'when cache version is updated' do let(:old_version) { cache_version - 1 } let(:old_html) { '

Foo

' } let(:thing) do # This forces the record to have outdated HTML. We can't use `create` because the `before_create` hook # would re-render the HTML to the latest version klass.create.tap do |thing| thing.update_columns(description: markdown, description_html: old_html, cached_markdown_version: old_version) end end it 'correctly updates cached HTML even if refresh_markdown_cache is called before updating the attribute' do thing.refresh_markdown_cache thing.update(description: updated_markdown) expect(thing.description_html).to eq(updated_html) end end end context 'for other classes' do let(:klass) { other_class } it_behaves_like 'a class with cached markdown fields' end end