Add missing files

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6264 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/lib/active_support/core_ext/date_time/conversions.rb

+module ActiveSupport #:nodoc:
+  module CoreExtensions #:nodoc:
+    module DateTime #:nodoc:
+      # Getting datetimes in different convenient string representations and other objects
+      module Conversions
+        DATE_FORMATS = {
+          :db     => "%Y-%m-%d %H:%M:%S",
+          :time   => "%H:%M",
+          :short  => "%d %b %H:%M",
+          :long   => "%B %d, %Y %H:%M",
+          :rfc822 => "%a, %d %b %Y %H:%M:%S %z"
+        }
+        def self.included(klass)
+          klass.send(:alias_method, :to_datetime_default_s, :to_s)
+          klass.send(:alias_method, :to_s, :to_formatted_s)
+        end
+        
+        def to_formatted_s(format = :default)
+          DATE_FORMATS[format] ? strftime(DATE_FORMATS[format]).strip : to_datetime_default_s          
+        end
+
+        def to_date
+          ::Date.new(year, month, day)
+        end
+      end
+    end
+  end
+end
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activesupport/test/core_ext/date_time_ext_test.rb

+require File.dirname(__FILE__) + '/../abstract_unit'
+
+class DateTimeExtCalculationsTest < Test::Unit::TestCase
+  def test_to_s
+    assert_equal "2005-02-21 14:30:00",               DateTime.new(2005, 2, 21, 14, 30, 0).to_s(:db)
+    assert_equal "14:30",                             DateTime.new(2005, 2, 21, 14, 30, 0).to_s(:time)
+    assert_equal "21 Feb 14:30",                      DateTime.new(2005, 2, 21, 14, 30, 0).to_s(:short)
+    assert_equal "February 21, 2005 14:30",           DateTime.new(2005, 2, 21, 14, 30, 0).to_s(:long)
+    assert_equal "Mon, 21 Feb 2005 14:30:00 +0000",   DateTime.new(2005, 2, 21, 14, 30, 0).to_s(:rfc822)
+  end
+
+  def test_to_date
+    assert_equal Date.new(2005, 2, 21), DateTime.new(2005, 2, 21).to_date
+  end
+end
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