1 files changed, 28 insertions, 0 deletions
diff --git a/test/ruby/test_require_lib.rb b/test/ruby/test_require_lib.rb
new file mode 100644
index 0000000000..44dfbcf9ec
--- /dev/null
+++ b/test/ruby/test_require_lib.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+require 'test/unit'
+
+class TestRequireLib < Test::Unit::TestCase
+  libdir = __dir__ + '/../../lib'
+
+  # .rb files at lib
+  scripts = Dir.glob('*.rb', base: libdir).map {|f| f.chomp('.rb')}
+
+  # .rb files in subdirectories of lib without same name script
+  dirs = Dir.glob('*/', base: libdir).map {|d| d.chomp('/')}
+  dirs -= scripts
+  scripts.concat(Dir.glob(dirs.map {|d| d + '/*.rb'}, base: libdir).map {|f| f.chomp('.rb')})
+
+  # skip some problems
+  scripts -= %w[bundler bundled_gems rubygems mkmf set/sorted_set]
+
+  scripts.each do |lib|
+    define_method "test_thread_size:#{lib}" do
+      assert_separately(['-W0'], "#{<<~"begin;"}\n#{<<~"end;"}", timeout: 60)
+      begin;
+        n = Thread.list.size
+        require #{lib.dump}
+        assert_equal n, Thread.list.size
+      end;
+    end
+  end
+end