add a failing test for marshal + cache problems

1 files changed, 26 insertions, 0 deletions

diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb
index c91cf89f6d..9feba385a1 100644
--- a/activerecord/test/cases/base_test.rb
+++ b/activerecord/test/cases/base_test.rb
@@ -1324,6 +1324,32 @@ class BasicsTest < ActiveRecord::TestCase
     assert_equal 1, post.comments.length
   end
 
+  def test_marshal_between_processes
+    skip "fork isn't supported" unless Process.respond_to?(:fork)
+
+    # Define a new model to ensure there are no caches
+    if self.class.const_defined?("Post", false)
+      flunk "there should be no post constant"
+    end
+
+    self.class.const_set("Post", Class.new(ActiveRecord::Base) {
+      has_many :comments
+    })
+
+    rd, wr = IO.pipe
+    pid = fork do
+      rd.close
+      post = Post.new
+      post.comments.build
+      wr.write Marshal.dump(post)
+      wr.close
+    end
+
+    wr.close
+    assert Marshal.load rd.read
+    rd.close
+  end
+
   def test_marshalling_new_record_round_trip_with_associations
     post = Post.new
     post.comments.build