Does google have a CloudResourceManager emulator for testing?

Question

Java

I am pulling IAM roles and filtering in the project. I use the CloudResourceManager class from the Google library. Now we need to test this filtering. To do this, you need to get roles from Google IAM in tests, not necessarily real ones. Is there any emulator for this from Google? Some library. I don't want to mock calls to CloudResourceManager methods, because there is a long chain of calls. java