Added memcheck to CI

Author: ankane

.github/workflows/build.yml

@@ -9,14 +9,14 @@ jobs:
         include:
           - ruby: "4.0"
             os: ubuntu-24.04
-          - ruby: 3.4
-            os: ubuntu-24.04
-          - ruby: 3.3
-            os: macos-14
-          - ruby: 3.2
-            os: ubuntu-22.04
-          - ruby: 3.1
-            os: macos-15-intel
+          # - ruby: 3.4
+          #   os: ubuntu-24.04
+          # - ruby: 3.3
+          #   os: macos-14
+          # - ruby: 3.2
+          #   os: ubuntu-22.04
+          # - ruby: 3.1
+          #   os: macos-15-intel
     steps:
       - uses: actions/checkout@v5
       - uses: ruby/setup-ruby@v1
@@ -25,3 +25,8 @@ jobs:
           bundler-cache: true
       - run: MAKE="make -j$(getconf _NPROCESSORS_ONLN)" bundle exec rake compile
       - run: bundle exec rake test
+
+      - if: ${{ startsWith(matrix.os, 'ubuntu') }}
+        run: |
+          sudo apt-get update && sudo apt-get install valgrind
+          bundle exec rake test:valgrind

Gemfile

@@ -5,6 +5,7 @@ gemspec
 gem "rake"
 gem "rake-compiler"
 gem "minitest"
+gem "ruby_memcheck"
 
 # https://github.com/ruby/openssl/issues/952
 gem "openssl" if RUBY_PLATFORM =~ /darwin/

Rakefile

@@ -1,11 +1,18 @@
 require "bundler/gem_tasks"
 require "rake/testtask"
 require "rake/extensiontask"
+require "ruby_memcheck"
 
-Rake::TestTask.new do |t|
+test_config = lambda do |t|
   t.pattern = "test/**/*_test.rb"
 end
 
+Rake::TestTask.new(:test, &test_config)
+
+namespace :test do
+  RubyMemcheck::TestTask.new(:valgrind, &test_config)
+end
+
 task default: :test
 
 Rake::ExtensionTask.new("or-tools") do |ext|

test/shift_scheduling_sat_test.rb

@@ -2,6 +2,8 @@
 
 class ShiftSchedulingSatTest < Minitest::Test
   def test_shift_scheduling_sat
+    skip if ENV["RUBY_MEMCHECK_RUNNING"]
+
     num_employees = 8
     num_weeks = 3
     shifts = %w[O M A N]