gitlab-ce/spec/lib/gitlab/diff/line_spec.rb

describe Gitlab::Diff::Line do
  context "when setting rich text" do
    it 'escapes any HTML special characters in the diff chunk header' do
      subject = described_class.new("<input>", "", 0, 0, 0)
      line = subject.as_json

      expect(line[:rich_text]).to eq("&lt;input&gt;")
    end
  end
end