[ruby/date] Fix cannot load complex into simple error when loading marshal dump (Fixes #20)

This problem exists because Marshal.load calls Date.allocate, which
uses a SimpleDateData.  There doesn't seem to be any support for
taking an existing Date instance and converting it from SimpleDateData
to ComplexDateData.  Work around this issue by making Date.allocate
use a ComplexDateData.  This causes problems in Date#initialize,
so remove the Date#initialize method (keeping the date_initialize
function, used internally for Date.civil). Alias Date.new to
Date.civil, since they do the same thing.

https://github.com/ruby/date/commit/6bb8d8fa0f

1 files changed, 7 insertions, 0 deletions

diff --git a/test/date/test_date_marshal.rb b/test/date/test_date_marshal.rb
index c7ce737aac..fa8b2d91f8 100644
--- a/test/date/test_date_marshal.rb
+++ b/test/date/test_date_marshal.rb
@@ -39,6 +39,13 @@ class TestDateMarshal < Test::Unit::TestCase
     assert(d.frozen?)
     expected_error = defined?(FrozenError) ? FrozenError : RuntimeError
     assert_raise(expected_error){d.marshal_load(a)}
+
+    d = Date.new + 1/2r + 2304/65437r/86400
+    m = Marshal.dump(d)
+    d2 = Marshal.load(m)
+    assert_equal(d, d2)
+    assert_equal(d.start, d2.start)
+    assert_instance_of(String, d2.to_s)
   end
 
   def test_memsize