RUBY-250 RUBY-231 Test fork safety

test/auxillary/fork_test.rb

@@ -0,0 +1,30 @@
+$:.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
+require 'mongo'
+require 'test/unit'
+require './test/test_helper'
+
+class ForkTest < Test::Unit::TestCase
+  include Mongo
+
+  def setup
+    @conn = standard_connection
+  end
+
+  def test_fork
+    # Now insert some data
+    10.times do |n|
+      @conn[MONGO_TEST_DB]['nums'].insert({:a => n})
+    end
+
+    # Now fork. You'll almost always see an exception here.
+    if !Kernel.fork
+      10.times do
+        assert @conn[MONGO_TEST_DB]['nums'].find_one
+      end
+    else
+      10.times do
+        assert @conn[MONGO_TEST_DB]['nums'].find_one
+      end
+    end
+  end
+end