Initialize Tests - Local
  ✅ should error when SDK key is missing
  ✅ should error when SDK key is invalid
  ✅ initializes correctly on valid data
  ✅ calls initialize promise/callback when config is successfully retrieved
  ✅ calls initialize promise/callback when config fails to be retrieved
  ❌ defaults variable when config fails to be retrieved, and then recovers
	Error: Unexpected requests received: Error: Nock: No match for request {
  ⚪ stops the polling interval when the sdk key is invalid and cdn responds 403, throws error
  ✅ fetches config again after 3 seconds when config polling interval is overriden
  ✅ uses the same config if the etag matches
  ✅ uses the same config if the refetch fails, after retrying once
  ✅ uses the same config if the response is invalid JSON
  ✅ uses the same config if the response is valid JSON but invalid data
  ✅ uses the new config when etag changes, and flushes existing events