如何在 Rails/RSpec 中测试异常引发? [英] How to test exception raising in Rails/RSpec?

问题描述

有如下代码:

def index
    @car_types = car_brand.car_types
end

def car_brand
    CarBrand.find(params[:car_brand_id])
    rescue ActiveRecord::RecordNotFound
        raise Errors::CarBrandNotFound.new 
end

我想通过 RSpec 对其进行测试.我的代码是:

I want to test it through RSpec. My code is:

it 'raises CarBrandNotFound exception' do
    get :index, car_brand_id: 0
    expect(response).to raise_error(Errors::CarBrandNotFound)
end

id 等于 0 的 CarBrand 不存在，因此我的控制器代码引发 Errors::CarBrandNotFound，但我的测试代码告诉我没有引发任何问题.我该如何解决?我怎么了?

CarBrand with id equaling 0 doesn't exist, therefore my controller code raises Errors::CarBrandNotFound, but my test code tells me that nothing was raised. How can I fix it? What do I wrong?

推荐答案

使用 expect{} 而不是 expect().

示例:

it do 
  expect { response }.to raise_error(Errors::CarBrandNotFound)
end

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