When testing against an external service, it’s common to mock that external service. But what if the contract for the external service changes? Your tests will still pass, but your application will fail.

Martin Fowler advocates an integration contract test which tests your application against the service. These tests are not run as frequently and … Read more

Prolog in Python.

I prefer the explicit ‘self’ in Python as it removes ambiguity. The existence of decorators is also a great argument for ‘self’.