Sidekiq specs are broken on Ruby 3.2

[ivoanjo]

Current behaviour:

In #2601 I needed to disable the sidekiq specs ( b8a028e ) as otherwise they were breaking in CI:

Failure/Error: expect(status && status.success?).to be(true), "STDOUT:`#{stdout}` STDERR:`#{stderr}"

  STDOUT:`2023-02-07T10:53:37.191Z pid=1804 tid=1dvz INFO: Booting Sidekiq 6.5.5 with Sidekiq::RedisConnection::RedisAdapter options {:url=>"redis://127.0.0.1:6379"}
  2023-02-07T10:53:37.194Z pid=1804 tid=1evg INFO: Running in ruby 3.2.0 (2022-12-25 revision a528908271) [x86_64-linux]
  2023-02-07T10:53:37.194Z pid=1804 tid=1evg INFO: See LICENSE and the LGPL-3.0 for licensing details.
  2023-02-07T10:53:37.195Z pid=1804 tid=1evg INFO: Upgrade to Sidekiq Pro for more features and support: https://sidekiq.org
  ` STDERR:`/usr/local/bundle/gems/sidekiq-6.5.5/lib/sidekiq/processor.rb:65: warning: global variable `$TESTING' not initialized
  /usr/local/bundle/gems/sidekiq-6.5.5/lib/sidekiq/launcher.rb:69: warning: global variable `$TESTING' not initialized
  /usr/local/bundle/gems/sidekiq-6.5.5/lib/sidekiq/cli.rb:18: warning: global variable `$TESTING' not initialized
  /app/spec/support/synchronization_helpers.rb:86:in `try_wait_until': Wait time exhausted! (RuntimeError)
  	from /app/spec/datadog/tracing/contrib/sidekiq/support/helper.rb:72:in `block in expect_in_sidekiq_server'
  	from /app/spec/support/synchronization_helpers.rb:20:in `block in expect_in_fork'
  	from /app/spec/support/synchronization_helpers.rb:15:in `fork'
  	from /app/spec/support/synchronization_helpers.rb:15:in `expect_in_fork'
  	from /app/spec/datadog/tracing/contrib/sidekiq/support/helper.rb:54:in `expect_in_sidekiq_server'
  	from /app/spec/datadog/tracing/contrib/sidekiq/server_internal_tracer/job_fetch_spec.rb:21:in `block (2 levels) in <top (required)>'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:263:in `instance_exec'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:263:in `block in run'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:511:in `block in with_around_and_singleton_context_hooks'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:468:in `block in with_around_example_hooks'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:486:in `block in run'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:626:in `block in run_around_example_hooks_for'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:352:in `call'
  	from /app/spec/datadog/tracing/contrib/support/tracer_helpers.rb:96:in `block (2 levels) in <module:TracerHelpers>'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:457:in `instance_exec'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:457:in `instance_exec'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:390:in `execute_with'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:628:in `block (2 levels) in run_around_example_hooks_for'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:352:in `call'
  	from /app/spec/spec_helper.rb:220:in `block (2 levels) in <top (required)>'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:457:in `instance_exec'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:457:in `instance_exec'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:390:in `execute_with'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:628:in `block (2 levels) in run_around_example_hooks_for'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:352:in `call'
  	from /app/spec/spec_helper.rb:112:in `block (2 levels) in <top (required)>'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:457:in `instance_exec'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:457:in `instance_exec'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:390:in `execute_with'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:628:in `block (2 levels) in run_around_example_hooks_for'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:352:in `call'
  	from /usr/local/bundle/gems/webmock-3.13.0/lib/webmock/rspec.rb:37:in `block (2 levels) in <top (required)>'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:457:in `instance_exec'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:457:in `instance_exec'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:390:in `execute_with'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:628:in `block (2 levels) in run_around_example_hooks_for'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:352:in `call'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:629:in `run_around_example_hooks_for'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/hooks.rb:486:in `run'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:468:in `with_around_example_hooks'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:511:in `with_around_and_singleton_context_hooks'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example.rb:259:in `run'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example_group.rb:646:in `block in run_examples'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example_group.rb:642:in `map'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example_group.rb:642:in `run_examples'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/example_group.rb:607:in `run'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/runner.rb:121:in `block (3 levels) in run_specs'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/runner.rb:121:in `map'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/runner.rb:121:in `block (2 levels) in run_specs'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/configuration.rb:2070:in `with_suite_hooks'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/runner.rb:116:in `block in run_specs'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/reporter.rb:74:in `report'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/runner.rb:115:in `run_specs'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/runner.rb:89:in `run'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/runner.rb:71:in `run'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/lib/rspec/core/runner.rb:45:in `invoke'
  	from /usr/local/bundle/gems/rspec-core-3.12.0/exe/rspec:4:in `<main>'
./spec/support/synchronization_helpers.rb:8:in `block in expect_in_fork'
./spec/support/synchronization_helpers.rb:34:in `expect_in_fork'
./spec/datadog/tracing/contrib/sidekiq/support/helper.rb:54:in `expect_in_sidekiq_server'
./spec/datadog/tracing/contrib/sidekiq/server_internal_tracer/job_fetch_spec.rb:21:in `block (2 levels) in <top (required)>'
./spec/datadog/tracing/contrib/support/tracer_helpers.rb:96:in `block (2 levels) in <module:TracerHelpers>'
./spec/spec_helper.rb:220:in `block (2 levels) in <top (required)>'
./spec/spec_helper.rb:112:in `block (2 levels) in <top (required)>'
/usr/local/bundle/gems/webmock-3.13.0/lib/webmock/rspec.rb:37:in `block (2 levels) in <top (required)>'

Expected behaviour:

Sidekiq specs should work correctly on Ruby 3.2.

Steps to reproduce:

Revert b8a028e and run the sidekiq specs on 3.2.

How does ddtrace help you?:

Pays the bills? ;)

Environment:

• ddtrace version: All versions supporting 3.2 are affected
• Configuration block (Datadog.configure ...): N/A
• Ruby version: 3.2
• Operating system: Linux
• Relevant library versions: N/A

[TonyCTHsu]

This should be fixed if sidekiq 6.5.8, which is already be done by #2615. I am opening a PR to enable it