###Chapter 14: Dependencies on Libraries Are Killing Me###
- Avoid promiscuously calling on libraries throughout your code. (ActiveRecord??)
- “Every hard-coded use of a library class is a place where you could have had a seam.”
- Is there any relevance for the language feature enforced design constraints in Ruby? Objective-C?
###Chapter 15: My Application Is All API Calls###
- Don't test if your app is all API calls?
- ActiveRecord must be one the best tested libraries in existence