Make HashWithIndifferentAccess#update behave like Hash#update by returning the hash. Closes #3419, #3425

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3388 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Make HashWithIndifferentAccess#update behave like Hash#update by returning the hash. #3419, #3425 [asnem@student.ethz.ch, JanPrill@blauton.de, Marcel Molina Jr.]
+
 * Add ActiveSupport::JSON and Object#to_json for converting Ruby objects to JSON strings. [Sam Stephenson]
 
 * Add Object#with_options for DRYing up multiple calls to methods having shared options. [Sam Stephenson]  Example:

activesupport/lib/active_support/core_ext/hash/indifferent_access.rb

@@ -18,9 +18,12 @@ class HashWithIndifferentAccess < Hash
   def []=(key, value)
     regular_writer(convert_key(key), convert_value(value))
   end
-  def update(hash)
-    hash.each {|key, value| self[key] = value}
+
+  def update(other_hash)
+    other_hash.each {|key, value| self[key] = value}
+    self
   end
+  alias_method :merge!, :update
 
   def key?(key)
     super(convert_key(key))

activesupport/test/core_ext/hash_ext_test.rb

@@ -93,6 +93,29 @@ class HashExtTest < Test::Unit::TestCase
     assert_equal hash[3], 3
   end
 
+  def test_indifferent_update
+    hash = HashWithIndifferentAccess.new
+    hash[:a] = 'a'
+    hash['b'] = 'b'
+    
+    updated_with_strings = hash.update(@strings)
+    updated_with_symbols = hash.update(@symbols)
+    updated_with_mixed = hash.update(@mixed)
+
+    assert_equal updated_with_strings[:a], 1
+    assert_equal updated_with_strings['a'], 1
+    assert_equal updated_with_strings['b'], 2
+
+    assert_equal updated_with_symbols[:a], 1
+    assert_equal updated_with_symbols['b'], 2
+    assert_equal updated_with_symbols[:b], 2
+
+    assert_equal updated_with_mixed[:a], 1
+    assert_equal updated_with_mixed['b'], 2
+
+    assert [updated_with_strings, updated_with_symbols, updated_with_mixed].all? {|hash| hash.keys.size == 2}
+  end
+
   def test_assert_valid_keys
     assert_nothing_raised do
       { :failure => "stuff", :funny => "business" }.assert_valid_keys([ :failure, :funny ])