test that constants are available in candidates

    277 runs, 500 assertions, 26 failures, 0 errors, 0 skips

Apparently there are some kinks to work out.

semantic_conventions/test/opentelemetry/semantic_conventions/attributes_test.rb

@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+require 'test_helper'
+
+OLD_SEMCONV_ROOTS = %i[Resource Trace].freeze
+
+describe OpenTelemetry::SemanticConventions do
+  OLD_SEMCONV_ROOTS
+    .each do |old_root|
+      describe "old root #{old_root} has a corresponding SemanticCandidates namespace and constant" do
+        OpenTelemetry::SemanticConventions
+          .const_get(old_root)
+          .constants
+          .each do |const|
+            it "(#{const})" do
+              root_namespace = const.to_s.split('_').first
+              assert OpenTelemetry::SemanticCandidates.constants.include?(root_namespace.to_sym), "Missing candidate namespace: #{root_namespace}"
+
+              candidate_namespace = OpenTelemetry::SemanticCandidates.const_get(root_namespace.to_sym)
+              assert candidate_namespace.constants.include?(const), "Missing candidate constant: #{const}"
+            end
+          end
+      end
+    end
+
+  OpenTelemetry::SemanticConventions
+    .constants
+    .reject { |const| const == :VERSION }
+    .reject { |root_namespace| OLD_SEMCONV_ROOTS.include?(root_namespace) }
+    .each do |root_namespace|
+      describe "stable root (#{root_namespace})" do
+        OpenTelemetry::SemanticConventions
+          .const_get(root_namespace)
+          .constants
+          .each do |stable_const|
+            it "(#{stable_const})" do
+              candidate_namespace = OpenTelemetry::SemanticCandidates.const_get(root_namespace)
+              assert candidate_namespace.constants.include?(stable_const), "Missing stable constant in candidates: #{stable_const}"
+            end
+          end
+      end
+    end
+end

semantic_conventions/test/test_helper.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+# Copyright The OpenTelemetry Authors
+#
+# SPDX-License-Identifier: Apache-2.0
+
+if RUBY_ENGINE == 'ruby'
+  require 'simplecov'
+  SimpleCov.start
+  SimpleCov.minimum_coverage 85
+end
+
+require 'minitest/autorun'
+require 'pry'
+
+Dir[File.join(File.dirname(__FILE__), '..', 'lib', 'opentelemetry', '**', '*.rb')].sort.each { |file| require file }