使用Espresso on Emulator测试Android工作室中的Internet连接错误处理

I am writing Instrumentation tests for my app on Android Studios testing on an emulator with Espresso. I need to disable the internet from within the test to make sure my error handling functionality works when the user does not have internet available. I've searched all over for an easy way to programmatically disable the internet from an emulated device. Here is the closest I've come, which does not work.I am writing Instrumentation tests for my app o