cover_rage

cover_rage is a Ruby code coverage tool designed to be simple and easy to use. It can be used not only for test coverage but also in production services to identify unused code.

Key features:

1. Runs in continuous processes (e.g., Rails servers)

2. Zero dependencies

3. Supports forking and daemonization without additional setup

AND THAT’S IT!

No rack middleware, no fork callbacks, no configuration files, and no additional setup required.

It starts collecting coverage data and periodically writes to ./cover_rage.pstore.

To change the store type and location, refer to COVER_RAGE_STORE_URL below.

To export results to HTML later, run cover_rage.

No additional setup is required because Rails loads gems automatically, but you can customize the behavior by updating Gemfile.

To run cover_rage only in the test environment:

To manually start cover_rage:

Run cover_rage -h for more information.

1. COVER_RAGE_STORE_URL

   Available URL schemes:

   1. pstore://ABSOLUTE_PATH_TO_PSTORE_FILE

   2. redis://REDIS_HOST

   3. sqlite://ABSOLUTE_PATH_TO_SQLITE_DB_FILE

   Ensure you have the necessary gems (e.g., sqlite3, redis) installed to use other store types.

   Defaults to pstore:$(pwd)/cover_rage.pstore.

2. COVER_RAGE_INTERVAL

   It sets The interval in seconds between each write to the store.

   Defaults to 60.

3. COVER_RAGE_PATH_PREFIX

   cover_rage will only record files that match the specified prefix.

   Defaults to Rails.root if the Rails constant is defined; otherwise, defaults to Dir.pwd.