Preload project features in reference parser

Preloading of project_features mitigates N+1 queries when checking
references in other projects.

When loading projects for resources referenced in comments it
makes sense to include also associated project_features because
in the following step (`can_read_reference?(user, projects[node],
node)`) project features is used for checking permissions for the given
project.

1 files changed, 18 insertions, 0 deletions

diff --git a/spec/lib/banzai/reference_parser/commit_parser_spec.rb b/spec/lib/banzai/reference_parser/commit_parser_spec.rb
index cca53a8b9b9..f558dea209f 100644
--- a/spec/lib/banzai/reference_parser/commit_parser_spec.rb
+++ b/spec/lib/banzai/reference_parser/commit_parser_spec.rb
@@ -120,4 +120,22 @@ describe Banzai::ReferenceParser::CommitParser do
       expect(subject.find_commits(project, %w{123})).to eq([])
     end
   end
+
+  context 'when checking commits on another projects' do
+    let(:control_links) do
+      [commit_link]
+    end
+
+    let(:actual_links) do
+      control_links + [commit_link, commit_link]
+    end
+
+    def commit_link
+      project = create(:project, :repository, :public)
+
+      Nokogiri::HTML.fragment(%Q{<a data-commit="#{project.commit.id}" data-project="#{project.id}"></a>}).children[0]
+    end
+
+    it_behaves_like 'no project N+1 queries'
+  end
 end