Run tests with prism parser

.github/workflows/ci.yml

@@ -43,3 +43,19 @@ jobs:
           bundler: 2.3.26
       - name: Run tests
         run: bundle exec rspec
+
+  test-prism:
+    runs-on: ubuntu-latest
+    env:
+      BUNDLE_GEMFILE: "gemfiles/rubocop_1.66.gemfile"
+      PARSER_ENGINE: parser_prism
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true # 'bundle install' and cache gems
+          ruby-version: 3.3
+          bundler: 2.3.26
+      - name: Run tests
+        run: bundle exec rspec

.rubocop.yml

@@ -82,6 +82,10 @@ Style/SymbolArray:
 RSpec/ExampleLength:
   Max: 11
 
+RSpec/ContextWording:
+  Exclude:
+    - spec/shared_contexts.rb
+
 Gemspec/DevelopmentDependencies:
   EnforcedStyle: gemspec
 

rubocop-thread_safety.gemspec

@@ -38,6 +38,7 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency 'appraisal'
   spec.add_development_dependency 'bundler', '>= 1.10', '< 3'
+  spec.add_development_dependency 'prism'
   spec.add_development_dependency 'pry' unless ENV['CI']
   spec.add_development_dependency 'rake', '>= 10.0'
   spec.add_development_dependency 'rspec', '~> 3.0'

spec/rubocop/cop/thread_safety/mutable_class_instance_variable_spec.rb

@@ -283,9 +283,15 @@ def some_method
           end
 
           context 'when the frozen_string_literal comment is true' do
-            let(:prefix) { "# frozen_string_literal: true\n#{super()}" }
+            context 'with Ruby 2.7', unsupported_on: :prism do
+              let(:prefix) { "# frozen_string_literal: true\n#{super()}" }
 
-            it_behaves_like 'immutable objects', %("\#{a}")
+              it_behaves_like 'immutable objects', %("\#{a}")
+            end
+
+            context 'with Ruby 3', :ruby30 do
+              it_behaves_like 'mutable objects', %("\#{a}")
+            end
           end
 
           context 'when the frozen_string_literal comment is false' do
@@ -606,9 +612,17 @@ def assignment?
           end
 
           context 'when the frozen_string_literal comment is true' do
-            let(:prefix) { "# frozen_string_literal: true\n#{super()}" }
+            context 'with Ruby 2.7', unsupported_on: :prism do
+              let(:prefix) { "# frozen_string_literal: true\n#{super()}" }
 
-            it_behaves_like 'immutable objects', %("\#{a}")
+              it_behaves_like 'immutable objects', %("\#{a}")
+            end
+
+            context 'with Ruby 3', :ruby30 do
+              let(:prefix) { "# frozen_string_literal: true\n#{super()}" }
+
+              it_behaves_like 'mutable objects', %("\#{a}")
+            end
           end
 
           context 'when the frozen_string_literal comment is false' do

spec/shared_contexts.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+unless RuboCop::Version.version >= '1.6'
+  RSpec.shared_context 'ruby 2.7' do
+    # Prism supports parsing Ruby 3.3+.
+    let(:ruby_version) { ENV['PARSER_ENGINE'] == 'parser_prism' ? 3.3 : 2.7 }
+  end
+
+  RSpec.shared_context 'ruby 3.0' do
+    # Prism supports parsing Ruby 3.3+.
+    let(:ruby_version) { ENV['PARSER_ENGINE'] == 'parser_prism' ? 3.3 : 3.0 }
+  end
+
+  RSpec.shared_context 'ruby 3.1' do
+    # Prism supports parsing Ruby 3.3+.
+    let(:ruby_version) { ENV['PARSER_ENGINE'] == 'parser_prism' ? 3.3 : 3.1 }
+  end
+
+  RSpec.shared_context 'ruby 3.2' do
+    # Prism supports parsing Ruby 3.3+.
+    let(:ruby_version) { ENV['PARSER_ENGINE'] == 'parser_prism' ? 3.3 : 3.2 }
+  end
+
+  RSpec.shared_context 'ruby 3.3' do
+    let(:ruby_version) { 3.3 }
+  end
+
+  RSpec.shared_context 'ruby 3.4' do
+    let(:ruby_version) { 3.4 }
+  end
+end

spec/spec_helper.rb

@@ -18,6 +18,7 @@
 require 'rubocop-thread_safety'
 
 require 'rubocop/rspec/support'
+require_relative 'shared_contexts'
 
 RSpec.configure do |config|
   config.include RuboCop::RSpec::ExpectOffense
@@ -39,9 +40,18 @@
     config.fail_fast = ENV.key? 'RSPEC_FAIL_FAST'
   end
 
+  config.filter_run_excluding unsupported_on: :prism if ENV['PARSER_ENGINE'] == 'parser_prism'
+
   config.disable_monkey_patching!
 
   config.order = :random
 
   Kernel.srand config.seed
+
+  config.include_context 'ruby 2.7', :ruby27
+  config.include_context 'ruby 3.0', :ruby30
+  config.include_context 'ruby 3.1', :ruby31
+  config.include_context 'ruby 3.2', :ruby32
+  config.include_context 'ruby 3.3', :ruby33
+  config.include_context 'ruby 3.4', :ruby34
 end