一个 rspec it 子句中存在多个 should 语句 - 坏主意

多个 should 语句 - 坏主意？

ruby
describe Calculator do
  describe "#add" do
    it "正确地执行加法" do
      calculator = Calculator.new
      result = calculator.add(2, 3)
      expect(result).to eq(5)
    end
    it "对负数也有效" do
      calculator = Calculator.new
      result = calculator.add(-2, 3)
      expect(result).to eq(1)
    end
  end
  describe "#subtract" do
    it "正确地执行减法" do
      calculator = Calculator.new
      result = calculator.subtract(5, 3)
      expect(result).to eq(2)
    end
    it "对负数也有效" do
      calculator = Calculator.new
      result = calculator.subtract(3, -2)
      expect(result).to eq(5)
    end
  end
end