Disabling code coverage for guard spec runs

Question

For a variety of reasons, I find that running code coverage every time my files reload from guard is quite a burden. However, there doesn't seem to be a way to conditionally prevent SimpleCov from starting from the spec helper.

Is there a way to disable SimpleCov when run by guard, but not when I run it normally using rake spec?

Richie

Answer 1

I ultimately found this solution:

1. Add an environment variable in your Guardfile:

   guard :rspec, env: { 'NO_COVERAGE' => 'true' }

2. Check for it from the spec helper:

   SimpleCov.start :rails unless ENV["NO_COVERAGE"]

Richie

The env option is now deprecated, adding the env var to cmd is the now recommended solution, e.g.: guard :rspec, cmd: "NO_COVERAGE=true bin/rspec" – Tenotomy

Answer 2

In your spec helper:

unless ARGV.any? {|e| e =~ /guard-rspec/ }
  SimpleCov.start
end

The idea here is that guard-rspec invokes rspec with a special guard-rspec formatter. Looking for that on the command line given gives you the hint that it was invoked from Guard, so you can just skip SimpleCov if that's there.

Unison

Answer 3

In VsCode, I use Ruby Spec Command: NO_COVERAGE=true bin/rspec at the extension Rails Run Spec

Works too command line: NO_COVERAGE=true bin/rspec spec/*_spec.rb or NO_COVERAGE=true bundle exec rspec spec/*_spec.rb

Fourflusher

I use the SimpleCov gem – Fourflusher