$ bundle exec ruby -I"lib:test" -Eascii-8bit:ascii-8bit ~/.rbenv/versions/3.3.9/lib/ruby/gems/3.3.0/gems/rake-13.3.0/lib/rake/rake_test_loader.rb \
    "test/plugin/test_in_object_space.rb" "test/plugin/test_out_forward.rb" -v          
/home/watson/src/fluentd/lib/fluent/compat/parser.rb:28: warning: csv was loaded from the standard library, but will no longer be part of the default gems starting from Ruby 3.4.0.
You can add csv to your Gemfile or gemspec to silence this warning.
Loaded suite /home/watson/.rbenv/versions/3.3.9/lib/ruby/gems/3.3.0/gems/rake-13.3.0/lib/rake/rake_test_loader
Started
ForwardOutputTest: 
  test: Create new connection per send_data:                                                                                                                                                                                                                            .: (0.232909)
  test: Node with security is thread-safe on multi threads:                                                                                                                                                                                                             .: (0.822002)

...(snip)...
  
ObjectSpaceInputTest: 
  test_configure:                                                                                                                                                                                                                                                       .: (0.003062)
  test_emit:                                                                                                                                                                                                                                                            F
=============================================================================================================================================================================================================================================================================================
Failure: test_emit(ObjectSpaceInputTest):
      assert{ emits.length > 0 }
              |     |      |
              |     |      false
              |     0
              []
/home/watson/src/fluentd/test/plugin/test_in_object_space.rb:62:in `test_emit'
     59:     d.run(expect_emits: 3)
     60: 
     61:     emits = d.events
  => 62:     assert{ emits.length > 0 }
     63: 
     64:     emits.each { |tag, time, record|
     65:       assert_equal d.instance.tag, tag
=============================================================================================================================================================================================================================================================================================
: (300.307336)

Finished in 342.326487655 seconds.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
62 tests, 136 assertions, 1 failures, 0 errors, 0 pendings, 3 omissions, 0 notifications
98.3051% passed
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
0.18 tests/s, 0.40 assertions/s