Measuring test coverage with Mix
I am accustomed to using tools like codecov and coveralls to measure test coverage. But Mix has built-in test coverage calculations.
mix test --cover
Generating cover results ...
Percentage | Module
-----------|--------------------------
75.00% | Chameleon
100.00% | Chameleon.CMYK
100.00% | Chameleon.Color.CMYK.Any
...
100.00% | Chameleon.PantoneToHex
98.15% | Chameleon.RGB
100.00% | Chameleon.RGB888
87.50% | Chameleon.Util
100.00% | ChameleonTest.Case
-----------|--------------------------
97.25% | Total
It prints out a great summary, but also generates HTML files that details which lines are covered, and which are not.
open cover/Elixir.Chameleon.Util.html