database connections are automatically established after forking.

Connection pools are 1:1 with pids.

1 files changed, 21 insertions, 0 deletions

diff --git a/activerecord/test/cases/connection_management_test.rb b/activerecord/test/cases/connection_management_test.rb
index 496cd78136..fe1b40d884 100644
--- a/activerecord/test/cases/connection_management_test.rb
+++ b/activerecord/test/cases/connection_management_test.rb
@@ -26,6 +26,27 @@ module ActiveRecord
         assert ActiveRecord::Base.connection_handler.active_connections?
       end
 
+      def test_connection_pool_per_pid
+        return skip('must support fork') unless Process.respond_to?(:fork)
+
+        object_id = ActiveRecord::Base.connection.object_id
+
+        rd, wr = IO.pipe
+
+        pid = fork {
+          rd.close
+          wr.write Marshal.dump ActiveRecord::Base.connection.object_id
+          wr.close
+          exit!
+        }
+
+        wr.close
+
+        Process.waitpid pid
+        assert_not_equal object_id, Marshal.load(rd.read)
+        rd.close
+      end
+
       def test_app_delegation
         manager = ConnectionManagement.new(@app)