Codecov will ignore coverage files that use a "boil-the-ocean" strategy. Ruby does this when files are not included in your tests, and no lines are hit.
parsers: v1: include_full_missed_files: true # default false
The resulting coverage report is a file with every line missed, even empty lines with no source code.
Still missing files?
Simplecov.track_filesis the answer. See the example snippet below.
SimpleCov.start do # e.g., usage of track files track_files "/app/**/*.rb" end
Updated about a year ago