Effective Testing with RSpec 3

Your Turn

Whew! We gave you a lot to chew on in this chapter, from broad advice on test doubles to fine-grained design nuances. Here are just some of the principles we explored over several code examples:

• Construct your test environment carefully.
• Watch out for the “stubject.”
• Know the risks of partial doubles.
• Favor explicit dependency injection over more implicit techniques.
• Avoid faking an interface you don’t control.
• Look for high-fidelity fakes.
• Wrap third-party interfaces.

That’s a lot to keep in your head, but we’re definitely not asking you to do that! All of these bits of advice stem from one key practice: constructing your test environment carefully. Remember the laboratory metaphor when you’re writing your specs, and you should be fine.