✅ Add simplecov check action

.github/workflows/test.yml

@@ -29,3 +29,9 @@ jobs:
         rubygems: 3.5.14
     - name: Run test
       run: bundle exec rake test
+
+    - uses: joshmfrankel/simplecov-check-action@main
+      with:
+        minimum_suite_coverage: 90
+        minimum_file_coverage: 40 # TODO: increase this after switching to SASL::AuthenticationExchange
+        github_token: ${{ secrets.GITHUB_TOKEN }}

.simplecov

@@ -1,6 +1,13 @@
+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
+  enable_coverage  :branch
   primary_coverage :branch
   enable_coverage_for_eval
 

test/lib/helper.rb

@@ -1,4 +1,5 @@
 require "simplecov"
+require "simplecov-json"
 require "test/unit"
 require "core_assertions"