merges r26936 from trunk into ruby_1_9_1 and little refactoring.

--
* random.c (rb_reset_random_seed): set seed in this. [ruby-core:28655]
--
* random.c: refactoring.

* random.c (rand_srand): a new function that wraps
  rand_init and (re)initialization of the random seed as
  a VALUE.

* random.c (genrand_int32, genrand_real, rb_f_rand,
  rb_f_srand): using rand_srand.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@28511 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 10 insertions, 0 deletions

diff --git a/test/ruby/test_rand.rb b/test/ruby/test_rand.rb
index b7d841dbba..4887377c6d 100644
--- a/test/ruby/test_rand.rb
+++ b/test/ruby/test_rand.rb
@@ -164,4 +164,14 @@ class TestRand < Test::Unit::TestCase
     srand(0)
     assert_equal([1,4,2,5,3], [1,2,3,4,5].shuffle)
   end
+  
+  def test_fork_shuffle
+    pid = fork do
+      (1..10).to_a.shuffle
+      raise 'default seed is not set' if srand == 0
+    end
+    p2, st = Process.waitpid2(pid)
+    assert(st.success?)
+  rescue NotImplementedError, ArgumentError
+  end
 end