simplecov custom filter group to report ignored code

Question

I am trying to create a report in simplecov to report on rogue actions within my application. Basically I want a tab that reports any and only files that use the :nocov: parameter to prevent simplecov from reporting it. Now, I know these may not be all bad, so I only want to filter them to a tab and not affect the overall score.

Currently I have the custom tab setup, but the filter does not filter the files correctly. Can anyone point me in the right direction?

Sample simple cov ignored method:

# :nocov:
def my_debug_method
  do_something
end
# :nocov:

Here is my current .simplecov setup:

class IgnoredCodeFilter < SimpleCov::Filter
  def matches?(src_file)
    src_file.grep(/:nocov:/).size > 0
  end
end
SimpleCov.start do
  add_group "Ignored Code" do |src_file|
    IgnoredCodeFilter.new(src_file)
  end
end

Current error message:

Formatter SimpleCov::Formatter::HTMLFormatter failed with NoMethodError: undefined method `grep' for #<SimpleCov::SourceFile:0x007f920e166fa0> (.simplecov:13:in `block (2 levels) in <top (required)>')

Answer 1

Here is how I ultimately solved this issue in case others are looking for it.

Just add this to your .simplecov configuration file:

SimpleCov.start do
  add_group "Ignored Code" do |src_file|
    open(src_file.filename).grep(/:nocov:/).any?
  end
end