RSpec测试使用GET参数重定向到URL [英] RSpec testing redirect to URL with GET params

问题描述

假设我有一个FoosController和redirect_to_baz方法.

class FoosController < ApplicationController

  def redirect_to_baz
    redirect_to 'http://example.com/?foo=1&bar=2&baz=3'
  end

end

我正在用spec/controllers/foos_controller_spec.rb对此进行测试:

I'm testing this with spec/controllers/foos_controller_spec.rb:

require 'spec_helper'

describe FoosController, :type => :controller do

  describe "GET redirect_to_baz" do
    it "redirects to example.com with params" do
      get :redirect_to_baz
      expect(response).to redirect_to "http://example.com/?foo=1&bar=2&baz=3"
    end
  end

end

有效.但是，如果有人交换查询字符串参数(例如http://example.com/?bar=2&baz=3&foo=1)，则测试将失败.

It works. However, if someone swaps the query string parameters (e.g. http://example.com/?bar=2&baz=3&foo=1), the test fails.

我想做类似的事情:

expect(response).to redirect_to("http://example.com/", params: { foo: 1, bar: 2, baz: 3 })

我查看了文档我尝试搜索response.parameters，但没有找到类似的内容.甚至Hash#to_query似乎都不能解决这个问题.

I looked at the documentation and I tried searching for response.parameters, but I didn't find anything like that. Even Hash#to_query doesn't seem to solve this problem.

任何帮助将不胜感激.

推荐答案

来自文档，预期的重定向路径可以匹配正则表达式:

From the documentation, the expected redirect path can match a regex:

expect(response).to redirect_to %r(\Ahttp://example.com)

要验证重定向位置的查询字符串似乎有些复杂.您可以访问响应的位置，因此您应该可以执行以下操作:

To verify the redirect location's query string seems a little bit more convoluted. You have access to the response's location, so you should be able to do this:

response.location
# => http://example.com?foo=1&bar=2&baz=3

您应该能够像这样提取查询字符串参数:

You should be able to extract the querystring params like this:

redirect_params = Rack::Utils.parse_query(URI.parse(response.location).query)
# => {"foo"=>"1", "bar"=>"2", "baz"=>"3"}

因此，应该很简单地验证重定向参数是否正确:

And from that it should be straightforward to verify that the redirect params are correct:

expect(redirect_params).to eq("foo" => "1", "baz" => "3", "bar" => "2")
# => true

如果您必须多次执行这种逻辑，将所有内容包装到自定义rspec匹配器中肯定会很方便.

If you have to do this sort of logic more than once though, it would definitely be convenient to wrap it all up into a custom rspec matcher.

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