Textbook example of a proper TDD practice at scale. You change the left but not the right. Clean that up and make sure it’s robust. Then change the right. Test,

Textbook example of a proper TDD practice at scale. You change the left but not the right. Clean that up and make sure it’s robust. Then change the right. Test, then test some more. Obviously novel at Netflix scale but still. The practices at the service extend to the architecture and everyone’s a winner. Good work and great write up.