expect(order).to be_fulfilled
expect(user).to have_permission(:admin)

expect(order.status).to eq("fulfilled")
expect(user.permissions).to include("admin")

RSpec.describe Order do
  describe "#fulfill" do
    context "when all items are in stock" do
      it "marks the order as fulfilled" do
        order = build(:order, :with_available_items)
        
        order.fulfill
        
        expect(order).to be_fulfilled
      end
    end
  end
end

describe("Order", () => {
  describe("fulfill", () => {
    it("marks the order as fulfilled when all items are in stock", () => {
      const order = buildOrder({ items: availableItems });
      
      order.fulfill();
      
      expect(order.isFulfilled()).toBe(true);
    });
  });
});