模拟库功能在上下文块下不能正常工作？

Question

我下面有一个ChefSpec测试，我不确定它是否是ChefSpec中的错误。 但是，每当我在上下文块下模拟库函数时，该模拟库都不会模拟该函数的值并导致测试失败。奇怪的是，当所有“ it”块都停留在该上下文块内时，通过的测试（模拟起作用），但是如果我在该上下文块之外添加任何其他“ it”块，则模拟将无法模拟库函数，并且开始走进他们。

有什么办法可以解决或解决此问题？谢谢

context "when site_tool is not set (default)" do 
            #This mocking block is not working properly inside the context block.
            #If I move everything out of this context block, everything works fine
            # including the mocking library function below. 
            # The error is basically it tried to step into the library function,
            # even though its not supposed to as I have mocked it out 
            # Is there a different way of mocking library function 
            #specifically for outside and inside context block??
            before do 
                allow_any_instance_of(Chef::Recipe)
                    .to receive(:get_service_account_password)
                    .with(site[:app][:permissions][:base_username]) 
                    .and_return("test_password")
            end  

            it 'adds the default app pool' do
            is_expected.to add_iis_pool('DefaultAppPool').with(
                ...
            )
            end
            ## More complicated 'it' blocks below
        end