minitest

minitest is a testing framework for Ruby.

Enabling XML Output

minitest can be configured to produce JUnit XML output by installing the minitest Ruby gem.

gem install minitest

Then require and enable the minitest gem in your test code like this:

# mixer.rb
require 'minitest/autorun'
require 'minitest/reporters'
Minitest::Reporters.use! Minitest::Reporters::JUnitReporter.new('ruby/minitest/results', write_files: true)

class ColorMixerTest < Minitest::Test
  def test_red_and_blue
    mixer = ColorMixer.new
    assert mixer.mix('red', 'blue') == 'purple'
  end
end

Run it with bundle exec ruby ruby/minitest/mixer.rb and it will produce output that looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<testsuites>
  <testsuite name="ColorMixerTest" filepath="ruby/minitest/mixer.rb" skipped="0" failures="0" errors="0" tests="3" assertions="3" time="1.7999904230237007e-05">
    <testcase name="test_red_and_yellow" 
      lineno="12" 
      classname="ColorMixerTest" 
      assertions="1" 
      time="1.0999967344105244e-05" 
      file="ruby/minitest/mixer.rb">
    </testcase>
  </testsuite>
</testsuites>

Test Suite Naming

The output file can be configured where you require minitest and use the JUnitReporter. The first argument to the constructor sets the output file.

Minitest::Reporters.use! Minitest::Reporters::JUnitReporter
  .new('ruby/minitest/results', write_files: true)

Further Information

See an example of using minitest in a GitHub action here.