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author | Patrick Bajao <ebajao@gitlab.com> | 2019-06-04 20:59:48 -0800 |
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committer | Patrick Bajao <ebajao@gitlab.com> | 2019-06-05 13:19:59 +0800 |
commit | 2eecfd8f9d111c6518930b818a16daea8263b37f (patch) | |
tree | 12234d26e6e5a950ad69741e761ef7d3d079fdd1 /spec/lib/gitlab/markdown_cache | |
parent | b560ce1e666733f12c65e8b9f659c89256c1775b (diff) | |
download | gitlab-ce-2eecfd8f9d111c6518930b818a16daea8263b37f.tar.gz |
Use Redis for CacheMarkDownField on non AR models
This allows using `CacheMarkdownField` for models that are not backed
by ActiveRecord.
When the including class inherits `ActiveRecord::Base` we include
`Gitlab::MarkdownCache::ActiveRecord::Extension`. This will cause the
markdown fields to be rendered and the generated HTML stored in a
`<field>_html` attribute on the record. We also store the version
used for generating the markdown.
All other classes that include this model will include the
`Gitlab::MarkdownCache::Redis::Extension`. This add the `<field>_html`
attributes to that model and will generate the html in them. The
generated HTML will be cached in redis under the key
`markdown_cache:<class>:<id>`. The class this included in must
therefore respond to `id`.
Diffstat (limited to 'spec/lib/gitlab/markdown_cache')
4 files changed, 336 insertions, 0 deletions
diff --git a/spec/lib/gitlab/markdown_cache/active_record/extension_spec.rb b/spec/lib/gitlab/markdown_cache/active_record/extension_spec.rb new file mode 100644 index 00000000000..6700b53e790 --- /dev/null +++ b/spec/lib/gitlab/markdown_cache/active_record/extension_spec.rb @@ -0,0 +1,177 @@ +# frozen_string_literal: true +require 'spec_helper' + +describe Gitlab::MarkdownCache::ActiveRecord::Extension do + class ARThingWithMarkdownFields < ActiveRecord::Base + self.table_name = 'issues' + include CacheMarkdownField + cache_markdown_field :title, whitelisted: true + cache_markdown_field :description, pipeline: :single_line + + attr_accessor :author, :project + end + + let(:cache_version) { Gitlab::MarkdownCache::CACHE_COMMONMARK_VERSION << 16 } + let(:thing) { ARThingWithMarkdownFields.new(title: markdown, title_html: html, cached_markdown_version: cache_version) } + + let(:markdown) { '`Foo`' } + let(:html) { '<p data-sourcepos="1:1-1:5" dir="auto"><code>Foo</code></p>' } + + let(:updated_markdown) { '`Bar`' } + let(:updated_html) { '<p data-sourcepos="1:1-1:5" dir="auto"><code>Bar</code></p>' } + + context 'an unchanged markdown field' do + let(:thing) { ARThingWithMarkdownFields.new(title: markdown) } + + before do + thing.title = thing.title + thing.save + end + + it { expect(thing.title).to eq(markdown) } + it { expect(thing.title_html).to eq(html) } + it { expect(thing.title_html_changed?).not_to be_truthy } + it { expect(thing.cached_markdown_version).to eq(cache_version) } + end + + context 'a changed markdown field' do + let(:thing) { ARThingWithMarkdownFields.new(title: markdown, title_html: html, cached_markdown_version: cache_version) } + + before do + thing.title = updated_markdown + thing.save + end + + it { expect(thing.title_html).to eq(updated_html) } + it { expect(thing.cached_markdown_version).to eq(cache_version) } + end + + context 'when a markdown field is set repeatedly to an empty string' do + it do + expect(thing).to receive(:refresh_markdown_cache).once + thing.title = '' + thing.save + thing.title = '' + thing.save + end + end + + context 'when a markdown field is set repeatedly to a string which renders as empty html' do + it do + expect(thing).to receive(:refresh_markdown_cache).once + thing.title = '[//]: # (This is also a comment.)' + thing.save + thing.title = '[//]: # (This is also a comment.)' + thing.save + end + end + + context 'a non-markdown field changed' do + let(:thing) { ARThingWithMarkdownFields.new(title: markdown, title_html: html, cached_markdown_version: cache_version) } + + before do + thing.state = 'closed' + thing.save + end + + it { expect(thing.state).to eq('closed') } + it { expect(thing.title).to eq(markdown) } + it { expect(thing.title_html).to eq(html) } + it { expect(thing.cached_markdown_version).to eq(cache_version) } + end + + context 'version is out of date' do + let(:thing) { ARThingWithMarkdownFields.new(title: updated_markdown, title_html: html, cached_markdown_version: nil) } + + before do + thing.save + end + + it { expect(thing.title_html).to eq(updated_html) } + it { expect(thing.cached_markdown_version).to eq(cache_version) } + end + + context 'when an invalidating field is changed' do + it 'invalidates the cache when project changes' do + thing.project = :new_project + allow(Banzai::Renderer).to receive(:cacheless_render_field).and_return(updated_html) + + thing.save + + expect(thing.title_html).to eq(updated_html) + expect(thing.description_html).to eq(updated_html) + expect(thing.cached_markdown_version).to eq(cache_version) + end + + it 'invalidates the cache when author changes' do + thing.author = :new_author + allow(Banzai::Renderer).to receive(:cacheless_render_field).and_return(updated_html) + + thing.save + + expect(thing.title_html).to eq(updated_html) + expect(thing.description_html).to eq(updated_html) + expect(thing.cached_markdown_version).to eq(cache_version) + end + end + + describe '.attributes' do + it 'excludes cache attributes that is blacklisted by default' do + expect(thing.attributes.keys.sort).not_to include(%w[description_html]) + end + end + + describe '#cached_html_up_to_date?' do + let(:thing) { ARThingWithMarkdownFields.create(title: updated_markdown, title_html: html, cached_markdown_version: nil) } + subject { thing.cached_html_up_to_date?(:title) } + + it 'returns false if markdown has been changed but html has not' do + thing.title = "changed!" + + is_expected.to be_falsy + end + + it 'returns true if markdown has not been changed but html has' do + thing.title_html = updated_html + + is_expected.to be_truthy + end + + it 'returns true if markdown and html have both been changed' do + thing.title = updated_markdown + thing.title_html = updated_html + + is_expected.to be_truthy + end + + it 'returns false if the markdown field is set but the html is not' do + thing.title_html = nil + + is_expected.to be_falsy + end + end + + describe '#refresh_markdown_cache!' do + before do + thing.title = updated_markdown + end + + it 'skips saving if not persisted' do + expect(thing).to receive(:persisted?).and_return(false) + expect(thing).not_to receive(:update_columns) + + thing.refresh_markdown_cache! + end + + it 'saves the changes' do + expect(thing).to receive(:persisted?).and_return(true) + + expect(thing).to receive(:update_columns) + .with("title_html" => updated_html, + "description_html" => "", + "cached_markdown_version" => cache_version) + + thing.refresh_markdown_cache! + end + end +end diff --git a/spec/lib/gitlab/markdown_cache/field_data_spec.rb b/spec/lib/gitlab/markdown_cache/field_data_spec.rb new file mode 100644 index 00000000000..393bf85aa43 --- /dev/null +++ b/spec/lib/gitlab/markdown_cache/field_data_spec.rb @@ -0,0 +1,15 @@ +# frozen_string_literal: true + +require 'fast_spec_helper' + +describe Gitlab::MarkdownCache::FieldData do + subject(:field_data) { described_class.new } + + before do + field_data[:description] = { project: double('project in context') } + end + + it 'translates a markdown field name into a html field name' do + expect(field_data.html_field(:description)).to eq("description_html") + end +end diff --git a/spec/lib/gitlab/markdown_cache/redis/extension_spec.rb b/spec/lib/gitlab/markdown_cache/redis/extension_spec.rb new file mode 100644 index 00000000000..d3d3cd6f03c --- /dev/null +++ b/spec/lib/gitlab/markdown_cache/redis/extension_spec.rb @@ -0,0 +1,76 @@ +# frozen_string_literal: true +require 'spec_helper' + +describe Gitlab::MarkdownCache::Redis::Extension, :clean_gitlab_redis_cache do + class ThingWithMarkdownFields + include CacheMarkdownField + + def initialize(title: nil, description: nil) + @title, @description = title, description + end + + attr_reader :title, :description + + cache_markdown_field :title, pipeline: :single_line + cache_markdown_field :description + + def id + "test-markdown-cache" + end + end + + let(:cache_version) { Gitlab::MarkdownCache::CACHE_COMMONMARK_VERSION << 16 } + let(:thing) { ThingWithMarkdownFields.new(title: "`Hello`", description: "`World`") } + let(:expected_cache_key) { "markdown_cache:ThingWithMarkdownFields:test-markdown-cache" } + + it 'defines the html attributes' do + thing = ThingWithMarkdownFields.new + + expect(thing).to respond_to(:title_html, :description_html, :cached_markdown_version) + end + + it 'loads the markdown from the cache only once' do + expect(thing).to receive(:load_cached_markdown).once.and_call_original + + thing.title_html + thing.description_html + end + + it 'correctly loads the markdown if it was stored in redis' do + Gitlab::Redis::Cache.with do |r| + r.mapped_hmset(expected_cache_key, + title_html: 'hello', + description_html: 'world', + cached_markdown_version: cache_version) + end + + expect(thing.title_html).to eq('hello') + expect(thing.description_html).to eq('world') + expect(thing.cached_markdown_version).to eq(cache_version) + end + + describe "#refresh_markdown_cache!" do + it "stores the value in redis" do + expected_results = { "title_html" => "`Hello`", + "description_html" => "<p data-sourcepos=\"1:1-1:7\" dir=\"auto\"><code>World</code></p>", + "cached_markdown_version" => cache_version.to_s } + + thing.refresh_markdown_cache! + + results = Gitlab::Redis::Cache.with do |r| + r.mapped_hmget(expected_cache_key, + "title_html", "description_html", "cached_markdown_version") + end + + expect(results).to eq(expected_results) + end + + it "assigns the values" do + thing.refresh_markdown_cache! + + expect(thing.title_html).to eq('`Hello`') + expect(thing.description_html).to eq("<p data-sourcepos=\"1:1-1:7\" dir=\"auto\"><code>World</code></p>") + expect(thing.cached_markdown_version).to eq(cache_version) + end + end +end diff --git a/spec/lib/gitlab/markdown_cache/redis/store_spec.rb b/spec/lib/gitlab/markdown_cache/redis/store_spec.rb new file mode 100644 index 00000000000..59c038cfb2f --- /dev/null +++ b/spec/lib/gitlab/markdown_cache/redis/store_spec.rb @@ -0,0 +1,68 @@ +# frozen_string_literal: true +require 'spec_helper' + +describe Gitlab::MarkdownCache::Redis::Store, :clean_gitlab_redis_cache do + let(:storable_class) do + Class.new do + cattr_reader :cached_markdown_fields do + Gitlab::MarkdownCache::FieldData.new.tap do |field_data| + field_data[:field_1] = {} + field_data[:field_2] = {} + end + end + + attr_accessor :field_1, :field_2, :field_1_html, :field_2_html, :cached_markdown_version + + def id + 'test-redisbacked-store' + end + end + end + let(:storable) { storable_class.new } + let(:cache_key) { "markdown_cache:#{storable_class}:#{storable.id}" } + + subject(:store) { described_class.new(storable) } + + def read_values + Gitlab::Redis::Cache.with do |r| + r.mapped_hmget(cache_key, + :field_1_html, :field_2_html, :cached_markdown_version) + end + end + + def store_values(values) + Gitlab::Redis::Cache.with do |r| + r.mapped_hmset(cache_key, + values) + end + end + + describe '#save' do + it 'stores updates to html fields and version' do + values_to_store = { field_1_html: "hello", field_2_html: "world", cached_markdown_version: 1 } + + store.save(values_to_store) + + expect(read_values) + .to eq({ field_1_html: "hello", field_2_html: "world", cached_markdown_version: "1" }) + end + end + + describe '#read' do + it 'reads the html fields and version from redis if they were stored' do + stored_values = { field_1_html: "hello", field_2_html: "world", cached_markdown_version: 1 } + + store_values(stored_values) + + expect(store.read.symbolize_keys).to eq(stored_values) + end + + it 'is mared loaded after reading' do + expect(store).not_to be_loaded + + store.read + + expect(store).to be_loaded + end + end +end |