simplecov-rcov is throwing a Encoding::UndefinedConversionError

Question

I have the following setup

Gemfile

  gem 'simplecov', require: false
  gem 'simplecov-rcov', require: false

spec_helper.rb

SimpleCov.formatter = SimpleCov::Formatter::RcovFormatter
SimpleCov.start 'rails'

In the specs I have tests for views.

After the tests are run and rcov tries to save the rcov_result I receive the following error:

/.rvm/gems/ruby-2.5.1/gems/simplecov-rcov-0.2.3/lib/simplecov-rcov.rb:52:in `write': "\xE2" from ASCII-8BIT to UTF-8 (Encoding::UndefinedConversionError)

Is there a way to solve this?

I had similar issue and the code I posted as answer fixed mine. Did you try that? — Akshay Kumar, Nov 27 '19 at 12:26
Unfortunately, no. I don't have access to that project anymore. — mmsilviu, Dec 02 '19 at 09:32

score 1 · Answer 1 · edited Feb 25 '20 at 00:48

Update the simplecov and simplecov-rcov gems to the latest versions and place the following code in your test/spec-helpers:

   class SimpleCov::Formatter::RcovFormatter
     def write_file(template, output_filename, binding)
       rcov_result = template.result( binding )
       File.open( output_filename, 'wb' ) do |file_result|
         file_result.write rcov_result
       end
     end
   end

More information here on files modes: File opening mode in Ruby

simplecov-rcov is throwing a Encoding::UndefinedConversionError

1 Answers1