Output junit format test report

.gitignore

@@ -16,3 +16,4 @@ package-lock.json
 pkg/
 /tmp/
 /yarn-error.log
+/test-reports/

Gemfile

@@ -102,6 +102,7 @@ instance_eval File.read local_gemfile if File.exist? local_gemfile
 group :test do
   gem "minitest-bisect"
   gem "minitest-retry"
+  gem "minitest-reporters"
 
   platforms :mri do
     gem "stackprof"

Gemfile.lock

@@ -111,6 +111,7 @@ GEM
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
     amq-protocol (2.3.0)
+    ansi (1.5.0)
     ast (2.4.0)
     aws-eventstream (1.0.1)
     aws-partitions (1.111.0)
@@ -316,6 +317,11 @@ GEM
     minitest-bisect (1.4.0)
       minitest-server (~> 1.0)
       path_expander (~> 1.0)
+    minitest-reporters (1.3.6)
+      ansi
+      builder
+      minitest (>= 5.0)
+      ruby-progressbar
     minitest-retry (0.1.9)
       minitest (>= 5.0)
     minitest-server (1.0.5)
@@ -555,6 +561,7 @@ DEPENDENCIES
   libxml-ruby
   listen (>= 3.0.5, < 3.2)
   minitest-bisect
+  minitest-reporters
   minitest-retry
   mysql2 (>= 0.4.10)
   nokogiri (>= 1.8.1)

actioncable/test/test_helper.rb

@@ -41,3 +41,5 @@ class ActionCable::TestCase < ActiveSupport::TestCase
     end
   end
 end
+
+require_relative "../../tools/test_common"

actionmailbox/test/test_helper.rb

@@ -54,3 +54,5 @@ class BounceMailer < ActionMailer::Base
     end
   end
 end
+
+require_relative "../../tools/test_common"

actionmailer/test/abstract_unit.rb

@@ -49,3 +49,5 @@ class ActiveSupport::TestCase
       skip message if defined?(JRUBY_VERSION)
     end
 end
+
+require_relative "../../tools/test_common"

actionpack/test/abstract_unit.rb

@@ -382,3 +382,5 @@ end
 class DrivenBySeleniumWithHeadlessFirefox < ActionDispatch::SystemTestCase
   driven_by :selenium, using: :headless_firefox
 end
+
+require_relative "../../tools/test_common"

actiontext/test/test_helper.rb

@@ -31,3 +31,5 @@ class ActiveSupport::TestCase
       ActiveStorage::Blob.create_after_upload! io: file_fixture(filename).open, filename: filename, content_type: content_type, metadata: metadata
     end
 end
+
+require_relative "../../tools/test_common"

actionview/test/abstract_unit.rb

@@ -205,3 +205,5 @@ class ActiveSupport::TestCase
       skip message if defined?(JRUBY_VERSION)
     end
 end
+
+require_relative "../../tools/test_common"

activejob/test/helper.rb

@@ -16,3 +16,5 @@ else
 end
 
 require "active_support/testing/autorun"
+
+require_relative "../../tools/test_common"

activemodel/test/cases/helper.rb

@@ -25,3 +25,5 @@ class ActiveModel::TestCase < ActiveSupport::TestCase
       skip message if defined?(JRUBY_VERSION)
     end
 end
+
+require_relative "../../../tools/test_common"

activerecord/test/cases/helper.rb

@@ -202,3 +202,5 @@ module InTimeZone
       ActiveRecord::Base.time_zone_aware_attributes = old_tz
     end
 end
+
+require_relative "../../../tools/test_common"

activestorage/test/test_helper.rb

@@ -101,3 +101,5 @@ end
 class Group < ActiveRecord::Base
   has_one_attached :avatar
 end
+
+require_relative "../../tools/test_common"

activesupport/test/abstract_unit.rb

@@ -40,3 +40,5 @@ class ActiveSupport::TestCase
       skip message if defined?(JRUBY_VERSION)
     end
 end
+
+require_relative "../../tools/test_common"

railties/test/abstract_unit.rb

@@ -32,3 +32,5 @@ class ActiveSupport::TestCase
       skip message if defined?(JRUBY_VERSION)
     end
 end
+
+require_relative "../../tools/test_common"

tools/test_common.rb

@@ -0,0 +1,15 @@
+if ENV["BUILDKITE"]
+  require "minitest/reporters"
+  require "fileutils"
+
+  module Minitest
+    def self.plugin_rails_ci_junit_format_test_report_for_buildkite_init(*)
+      dir = File.join(__dir__, "../test-reports/#{ENV['BUILDKITE_JOB_ID']}")
+      reporter << Minitest::Reporters::JUnitReporter.new(dir, false)
+      FileUtils.mkdir_p(dir)
+    end
+  end
+
+  Minitest.load_plugins
+  Minitest.extensions.unshift "rails_ci_junit_format_test_report_for_buildkite"
+end