Merge pull request #41 from DataDog/ivoanjo/prof-9963-dir-interruptio…

…n-testing-ruby-spec

[PROF-9963] Add integration testing for Ruby dir interruption monkey patch

scenarios/ruby_dir_interruption_patch/Dockerfile

@@ -0,0 +1,27 @@
+FROM ruby:3.3
+
+ENV DD_PROFILING_ENABLED true
+ENV DD_PROFILING_DIR_INTERRUPTION_WORKAROUND_ENABLED true
+
+COPY ./scenarios/ruby_dir_interruption_patch/*.rb /app/
+RUN chmod 755 /app/*
+
+WORKDIR /app
+RUN bundle install
+
+RUN wget https://github.com/ruby/spec/archive/refs/heads/master.zip -O spec-master.zip
+RUN wget https://github.com/ruby/mspec/archive/refs/heads/master.zip -O mspec-master.zip
+RUN unzip spec-master.zip
+RUN unzip mspec-master.zip
+
+# Since we aggressively drop permissions when running, we need to manually create a folder for rubyspec to use
+RUN mkdir /app/rubyspec_temp
+RUN chmod 777 /app/rubyspec_temp
+
+# Needed by one of the ruby specs (which is testing access to home)
+# @ivoanjo: Locally I get uid 1000, and in CI I'm seeing 1001. I am not sure why they differ, or if any other uids
+# can show up. But, if we're missing this for an user, it'll cause the tests to fail so we definitely won't miss it.
+RUN useradd -u 1000 -ms /bin/bash someuser
+RUN useradd -u 1001 -ms /bin/bash someuser2
+
+CMD bundle exec ddprofrb exec ruby mspec-master/bin/mspec-run --config mspec_config.rb spec-master/core/dir/

scenarios/ruby_dir_interruption_patch/expected_profile.json

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+{
+  "test_name": "ruby_dir_interruption_patch",
+  "stacks": [],
+  "note": "This test has no stacks, as it's not expected to emit profiles -- we're only testing that the mspec run is successful even when the profiler monkey patches are available."
+}

scenarios/ruby_dir_interruption_patch/gems.rb

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+source 'https://rubygems.org'
+
+gem 'datadog', git: 'https://github.com/datadog/dd-trace-rb.git', branch: 'master'

scenarios/ruby_dir_interruption_patch/mspec_config.rb

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+Datadog::Profiling.wait_until_running
+
+if Dir.ancestors.first == Datadog::Profiling::Ext::DirInstanceMonkeyPatches &&
+  Dir.singleton_class.ancestors.first == Datadog::Profiling::Ext::DirClassMonkeyPatches
+  puts "Dir interruption patch is present!"
+else
+  raise 'Dir interruption patch is not present!'
+end