Check out a free preview of the full Creating an Open Source JavaScript Library on Github course:
The "Code Coverage" Lesson is part of the full, Creating an Open Source JavaScript Library on Github course featured in this preview video. Here's what you'd learn in this lesson:

Code coverage is the process of monitoring how much code is “covered” by a unit test. Code coverage tools can monitor anything from statements and lines to functions and branches. Target thresholds are set in the configuration and coverage reports are output to the command line. - http://slides.com/kentcdodds/write-oss#/8/3

Get Unlimited Access Now