Nesting contexts to build up a "when"

nested_contexts_spec.rb

describe "#current_report" do
  its(:current_report) { should be == report }

  context "with a new" do
    let(:new_report) { Report.make(state: new_report_state, project_date: new_report_date) }

    before(:each) do
      subject.reports << new_report
    end

    context "published" do
      let(:new_report_state) { :published }

      context "more recent report" do
        let(:new_report_date) { Date.today + 1 }
        its(:current_report) { should be == new_report }
      end

      context "older report" do
        let(:new_report_date) { Date.today - 1 }
        its(:current_report) { should be == report }
      end
    end

    context "unpublished more recent report" do
      let(:new_report_state) { :approved }
      let(:new_report_date) { Date.today + 1 }
      its(:current_report) { should be == report }
    end
  end
end