Rails Stub在模块内部的一个变量 [英] Rails Stub a variable inside module

问题描述

我为此模块写了一个单元测试，想对来自应用程序控制器的current_account变量存根. (它的全局方法写在应用程序控制器中)

I wrote a unit test for this module and want to stub current_account variable which comes from application controller. (its global method written in application controller)

Module Foo
 def querying_result(criteria)
  User.find_by_account(current_account).where(criteria: criteria)
 end
end

我尝试了

Foo.stubs(current_account: @user.account).returns(@user.account)
Foo.any_instance.stub(current_account:@user.account).and_return(@user.account)

我的测试文件

class FooTest << ActiveSupport::TestCase
  context "querying the result"
    setup do
    @user = User.first
  end
  should "return all users" do
    users = querying_result(criteria)
    assert_equal users.count, 1
  end
end

我在这里想念什么?

推荐答案

据我所知，Foo模块可能直接包含在FooTest中.

From what I see Foo module might be included directly in the FooTest.

这很奇怪，但是要使其正常工作，您可能(仅猜测)存根self而不是Foo(self.stubs...).

This is weird, but to make it work you should probably (only guessing) stub self not Foo (self.stubs...).

但这不是您应该测试模块的方式.

IMO应该测试包含此模块的类.而且，如果您不想将测试与任何特定的类相关联，请在规范内创建一个.

IMO one should test classes that include this module. And if you don't want to tie your test to any specific class - create one inside the spec.

@dummy_class = Class.new do
   include Foo
   def initialize(current_account)
     @current_account = current_account # you can control this now by injecting the account on object creation
   end
   attr_accessor :current_account
end

并在测试中类似

@foo = @dummy_class.new(@user)
assert_equal(@foo.querying_result(criteria).count, 1)

您还可以跳过initialize部分，仅存根@foo对象.

You can also skip the initialize part and just stub @foo object.

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