我有一个Rails API，它可以抓取网站并将网站的文本内容存储到数据库中。我正在为create route编写一个rspec测试，但我一直得到错误：

Failure/Error: before { post 'POST /url_contents?url=www.google.com' }

 URI::InvalidURIError:
   bad URI(is not URI?): http://www.example.com:80POST /url_contents?url=www.google.com

但是，如果我自己通过Postman使用提供的URL进行post请求，它是成功的。为什么rspec会给我这个URI错误，我如何修复它？

This is how the test is written:

describe 'POST /url_contents' do

context 'when the url is valid' do

    before { post 'POST /url_contents', params: "www.google.com" }

    it 'returns a status code of 201' do 
        expect(response).to have_http_status(201)
    end

    end 

end

控制器操作如下所示：

def create
    scrapedContent = UrlContent.parser(url_params)
    if scrapedContent == 403
        render json: { messsage: "Invalid URL" } 
    else
        newContent = UrlContent.new
        binding.pry
        newContent.content = scrapedContent.encode("UTF-16be", :invalid=>:replace, :replace=>"?").encode('UTF-8')
        if newContent.save? 
            render json: {message: "Successfully added the url content"}, status: 201
        else 
            render json: { message: "error, #{newContent.errors.full_messages}"}, status: 412
        end 
    end 
end

谢谢你的洞察力！