如何对 JSON 控制器进行单元测试? [英] How to unit-test a JSON controller?

问题描述

这是我的操作:

def my_action
  str = ... # get json str somehow  
  render :json => str
end

这是我的测试:

test "my test" do 
  post(:my_action, {'param' => "value"}    
  assert_response :success
end

我想添加另一个断言，即发出的 JSON 包含一些值.如何在控制器单元测试中执行此操作，而不是通过解析视图结果?

I want to add another assertion that the emitted JSON contains some value. How can I do it in a controller unit-test, not via parsing the view result?

推荐答案

就像上面评论的那样，这将是一个功能测试.

Just like people commented above, this would be a functional test.

最好的方法可能是发出请求、解析 JSON 响应正文并将其与预期结果匹配.

The best way would probably be making a request, parsing the JSON response body, and matching it to the expected result.

如果我使用 FactoryGirl 在 Rspec 中有 companies_controller:

If I have companies_controller in Rspec using FactoryGirl:

describe "GET 'show'" do

  before(:each) do
    @company = Factory(:company)
    get 'show', :format => :json, :id => @company.id
  end

  it "should be successful" do
     response.should be_success
  end

  it "should return the correct company when correct id is passed" do
    body = JSON.parse(response.body)
    body["id"].should == @company.id
  end

end

您可以用同样的方式测试其他属性.另外，我通常有 invalid 上下文，我会在其中尝试传递无效参数.

You can test other attributes the same way. Also, I normally have invalid context where I would try to pass invalid parameters.

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