test that total code coverage tag is populated in unit tests

lib/datadog/ci/contrib/simplecov/result_extractor.rb

@@ -13,7 +13,10 @@ def self.included(base)
 
           module ClassMethods
             def __dd_peek_result
-              return nil unless datadog_configuration[:enabled]
+              unless datadog_configuration[:enabled]
+                Datadog.logger.debug("SimpleCov instrumentation is disabled")
+                return nil
+              end
 
               result = ::SimpleCov::UselessResultsRemover.call(
                 ::SimpleCov::ResultAdapter.call(::Coverage.peek_result)

lib/datadog/ci/test_visibility/total_coverage.rb

@@ -7,12 +7,26 @@ module CI
     module TestVisibility
       module TotalCoverage
         def self.extract_lines_pct(test_session)
-          return unless defined?(::SimpleCov)
-          return unless ::SimpleCov.running
-          return unless ::SimpleCov.respond_to?(:__dd_peek_result)
+          unless defined?(::SimpleCov)
+            Datadog.logger.debug("SimpleCov is not loaded, skipping code coverage extraction")
+            return
+          end
+
+          unless ::SimpleCov.running
+            Datadog.logger.debug("SimpleCov is not running, skipping code coverage extraction")
+            return
+          end
+
+          unless ::SimpleCov.respond_to?(:__dd_peek_result)
+            Datadog.logger.debug("SimpleCov is not patched, skipping code coverage extraction")
+            return
+          end
 
           result = ::SimpleCov.__dd_peek_result
-          return unless result
+          unless result
+            Datadog.logger.debug("SimpleCov result is nil, skipping code coverage extraction")
+            return
+          end
 
           test_session.set_tag(Ext::Test::TAG_CODE_COVERAGE_LINES_PCT, result.covered_percent)
         end

spec/datadog/ci/contrib/cucumber/instrumentation_spec.rb

@@ -180,10 +180,14 @@
       )
       expect(test_session_span).to have_pass_status
 
+      # ITR
       expect(test_session_span).to have_test_tag(:itr_test_skipping_enabled, "true")
       expect(test_session_span).to have_test_tag(:itr_test_skipping_type, "test")
       expect(test_session_span).to have_test_tag(:itr_tests_skipped, "false")
       expect(test_session_span).to have_test_tag(:itr_test_skipping_count, 0)
+
+      # Total code coverage
+      expect(test_session_span).to have_test_tag(:code_coverage_lines_pct)
     end
 
     it "creates test module span" do

spec/datadog/ci/contrib/minitest/instrumentation_spec.rb

@@ -440,11 +440,15 @@ def test_pass_other
             Datadog::CI::Contrib::Minitest::Integration.version.to_s
           )
 
+          # ITR
           expect(test_session_span).to have_test_tag(:itr_test_skipping_enabled, "true")
           expect(test_session_span).to have_test_tag(:itr_test_skipping_type, "test")
           expect(test_session_span).to have_test_tag(:itr_tests_skipped, "false")
           expect(test_session_span).to have_test_tag(:itr_test_skipping_count, 0)
 
+          # Total code coverage
+          expect(test_session_span).to have_test_tag(:code_coverage_lines_pct)
+
           expect(test_session_span).to have_pass_status
         end
 

spec/datadog/ci/contrib/rspec/instrumentation_spec.rb

@@ -554,6 +554,9 @@ def expect_failure
       expect(test_session_span).not_to have_test_tag(:itr_tests_skipped)
       expect(test_session_span).not_to have_test_tag(:itr_test_skipping_count)
 
+      # Total code coverage
+      expect(test_session_span).to have_test_tag(:code_coverage_lines_pct)
+
       expect(test_session_span).to have_pass_status
     end