ruby - 使用 Minitest 对 protected 或私有(private)方法进行 stub

Question

如何在功能 Controller 测试中 stub 要通过的私有(private)/ protected 方法？

以如下代码为例:

app/controllers/sessions_controller.rb

class SessionsController < ApplicationController
  def create
    @user = User.from_omniauth(auth_hash)
    reset_session
    session[:user_nickname] = @user.nickname

    if @user.email.blank?
      redirect_to edit_user_path(@user.nickname), :alert => "Please enter your email address."
    else
      redirect_to show_user_path(@user.nickname), :notice => 'Signed in!'
    end
  end

  private

  def auth_hash
    request.env['omniauth.auth']
  end
end

我尝试了以下方法:

test/controllers/sessions_controller_unit_test.rb

require 'test_helper'
class SessionsControllerTest < ActionController::TestCase

  test "should create new user" do

    # get the same 'request.env['omniauth.auth'] hash
    auth_h = OmniAuth.config.mock_auth[:github] 

    # but auth_hash is never passed in User.find_or_create_from_auth_hash(auth_hash) 
    # method, which result to be nil breaking the User model call
    get :create, provider: 'github', nickname: 'willishake', auth_hash: auth_h

    assert_redirected_to show_user_path(nickname: 'willishake')
    assert_equal session[:user_id], "willishake"
  end
end

但是当 get :create (测试方法)调用时模型 User.find_or_create_from_auth_hash(auth_hash)，auth_hash 为 nil，破坏了功能测试。

那么什么是 stub auth_hash 私有(private)方法并传递给用户模型调用 User.from_omniauth(auth_hash) 的正确方法？

更新:在 blowmage 建议之后，它的工作原理如下:

require 'test_helper'
class SessionsControllerTest < ActionController::TestCase

  def setup
    request.env['omniauth.auth'] = OmniAuth.config.mock_auth[:github]
  end

  test "should create new user" do
    get :create, provider: 'github', nickname: 'willishake'

    assert_equal session[:user_id], "willishake"
    assert_redirected_to show_user_path(nickname: 'willishake')
  end
end

Answer 1

试试这个:

# set the request.env['omniauth.auth'] hash
auth_h = OmniAuth.config.mock_auth[:github]
request.env['omniauth.auth'] = auth_h