Beginning Rails 6: From Novice to Professional

© Brady Somerville, Adam Gamble, Cloves Carneiro Jr and Rida Al Barazi 2020

B. Somerville et al.Beginning Rails 6https://doi.org/10.1007/978-1-4842-5716-6_16

16. Testing Your Application

Brady Somerville¹ , Adam Gamble², Cloves Carneiro Jr.³ and Rida Al Barazi⁴

(1)

Bowling Green, KY, USA

(2)

Gardendale, AL, USA

(3)

Hollywood, FL, USA

(4)

FONTHILL, ON, Canada

 

When an application is in its infancy, its developers may be able to keep a complete mental model of the whole system. Changes to the system are relatively easy to reason about, easy to implement, and easy to verify they’re working as intended.

However, most applications change over time. And as they grow, developers lose the ability to keep a complete mental model of the whole system. When that happens, ...