Coverband

Coverband measures which of your code actually runs in production, and shows it in a
mounted report.

What you get

• Line-level usage collected from real traffic
• A web report you mount at a path
• Dead-code identification: files that have never been hit
• Low overhead, sampled

Mounting it

# Gemfile
gem "coverband"

# config/routes.rb
authenticate :user, ->(user) { user.admin? } do
  mount Coverband::Reporters::Web.new, at: "/coverage"
end

Why it is in this directory

Coverage-as-a-service tells you what your tests touched. Coverband tells you what
your users touched, which is the number you want before deleting anything.