✅ Skip simplecov for non-CRuby engines

Author: nevans

.github/workflows/test.yml

@@ -44,7 +44,8 @@ jobs:
       timeout-minutes: 5 # _should_ finish in under a minute
 
     - uses: joshmfrankel/simplecov-check-action@main
-      if: matrix.os == 'ubuntu-latest' && github.event_name != 'pull_request'
+      if: ${{ matrix.os == 'ubuntu-latest' && github.event_name != 'pull_request' &&
+        !startsWith(matrix.ruby, 'truffleruby') && !startsWith(matrix.ruby, 'jruby') }}
       with:
         check_job_name: "SimpleCov - ${{ matrix.ruby }}"
         minimum_suite_coverage: 90

test/lib/helper.rb

@@ -1,31 +1,34 @@
-require "simplecov"
-
-# Cannot use ".simplecov" file: simplecov-json triggers a circular require.
-require "simplecov-json"
-SimpleCov.formatters = SimpleCov::Formatter::MultiFormatter.new([
-  SimpleCov::Formatter::HTMLFormatter,
-  SimpleCov::Formatter::JSONFormatter,
-])
-
-SimpleCov.start do
-  command_name "Net::IMAP tests"
-  enable_coverage  :branch
-  primary_coverage :branch
-  enable_coverage_for_eval
-
-  add_filter "/test/"
-  add_filter "/rakelib/"
-
-  add_group "Parser", %w[lib/net/imap/response_parser.rb
-                         lib/net/imap/response_parser]
-  add_group "Config", %w[lib/net/imap/config.rb
-                         lib/net/imap/config]
-  add_group "SASL", %w[lib/net/imap/sasl.rb
-                       lib/net/imap/sasl
-                       lib/net/imap/authenticators.rb]
-  add_group "StringPrep", %w[lib/net/imap/stringprep.rb
-                             lib/net/imap/stringprep]
+if RUBY_ENGINE == "ruby" # C Ruby only
+  require "simplecov"
+
+  # Cannot use ".simplecov" file: simplecov-json triggers a circular require.
+  require "simplecov-json"
+  SimpleCov.formatters = SimpleCov::Formatter::MultiFormatter.new([
+    SimpleCov::Formatter::HTMLFormatter,
+    SimpleCov::Formatter::JSONFormatter,
+  ])
+
+  SimpleCov.start do
+    command_name "Net::IMAP tests"
+    enable_coverage  :branch
+    primary_coverage :branch
+    enable_coverage_for_eval
+
+    add_filter "/test/"
+    add_filter "/rakelib/"
+
+    add_group "Parser", %w[lib/net/imap/response_parser.rb
+                          lib/net/imap/response_parser]
+    add_group "Config", %w[lib/net/imap/config.rb
+                          lib/net/imap/config]
+    add_group "SASL", %w[lib/net/imap/sasl.rb
+                        lib/net/imap/sasl
+                        lib/net/imap/authenticators.rb]
+    add_group "StringPrep", %w[lib/net/imap/stringprep.rb
+                              lib/net/imap/stringprep]
+  end
 end
+
 require "test/unit"
 require "core_assertions"