在Rails中过滤之前测试ApplicationController

这个 assigns 方法应允许您查询 @selected_trust . 断言其值等于“test”,如下所示:

assert_equal 'test', assigns('selected_trust')

给一个控制器 foo_controller.rb

class FooController < ApplicationController
  before_filter :get_trust_from_subdomain

  def get_trust_from_subdomain
    @selected_trust = "test"
  end

  def index
    render :text => 'Hello world'
  end
end

可以编写如下功能测试 foo_controller_test.rb :

class FooControllerTest < ActionController::TestCase
  def test_index
    get :index
    assert @response.body.include?('Hello world')
    assert_equal 'test', assigns('selected_trust')
  end
end

与注释相关:请注意,过滤器可以放置在 ApplicationController 然后,任何派生的控制器也将继承这个过滤器行为:

class ApplicationController < ActionController::Base
  before_filter :get_trust_from_subdomain

  def get_trust_from_subdomain
    @selected_trust = "test"
  end
end

class FooController < ApplicationController
  # get_trust_from_subdomain filter will run before this action.
  def index
    render :text => 'Hello world'
  end
end

ApplicationController 是全局的,您是否考虑编写机架中间件?更容易测试。

我在应用程序的另一个控制器中选择了此选项:

require 'test_helper'

class HomeControllerTest < ActionController::TestCase

  fast_context 'a GET to :index' do
    setup do
      Factory :trust
      get :index
    end
    should respond_with :success

    should 'set the trust correctly' do
      assert_equal 'test', assigns(:selected_trust)
    end
  end

end