From e74f63648098f2784658e67bbd411fc7910faeec Mon Sep 17 00:00:00 2001
From: Nobuhiro IMAI <nov@yo.rim.or.jp>
Date: Sun, 11 Oct 2009 12:11:55 +0900
Subject: [PATCH] improve the pretty printing of OrderedHash

* new method: ActiveSupport::OrderedHash#pretty_print
* add a test for above
---
 activesupport/lib/active_support/ordered_hash.rb |   14 ++++++++++++++
 activesupport/test/ordered_hash_test.rb          |   14 ++++++++++++++
 2 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/activesupport/lib/active_support/ordered_hash.rb b/activesupport/lib/active_support/ordered_hash.rb
index 4324e40..19559bb 100644
--- a/activesupport/lib/active_support/ordered_hash.rb
+++ b/activesupport/lib/active_support/ordered_hash.rb
@@ -124,6 +124,20 @@ module ActiveSupport
         "#<OrderedHash #{super}>"
       end
 
+      def pretty_print(q)
+        q.group(0, "#<OrderedHash", "}>") {
+          q.breakable " "
+          q.text "{"
+          q.group(1) {
+            q.seplist(self) {|pair|
+              q.pp pair.first
+              q.text "=>"
+              q.pp pair.last
+            }
+          }
+        }
+      end
+
     private
 
       def sync_keys!
diff --git a/activesupport/test/ordered_hash_test.rb b/activesupport/test/ordered_hash_test.rb
index 15bd571..de5d86d 100644
--- a/activesupport/test/ordered_hash_test.rb
+++ b/activesupport/test/ordered_hash_test.rb
@@ -163,6 +163,20 @@ class OrderedHashTest < Test::Unit::TestCase
     assert @ordered_hash.inspect.include?(@hash.inspect)
   end
 
+  def test_pretty_print
+    assert_equal "#<OrderedHash {}>\n", PP.pp(ActiveSupport::OrderedHash.new, "")
+    expected = <<'EXPECTED'
+#<OrderedHash
+{"blue"=>"000099",
+ "green"=>"009900",
+ "red"=>"aa0000",
+ "pink"=>"cc0066",
+ "orange"=>"cc6633"}>
+EXPECTED
+    PP.pp(@ordered_hash, actual = "")
+    assert_equal expected, actual
+  end
+
   def test_alternate_initialization_with_splat
     alternate = ActiveSupport::OrderedHash[1,2,3,4]
     assert_kind_of ActiveSupport::OrderedHash, alternate
-- 
1.6.4.3