Use I18n for date/time select helpers prompt text [#561 state:resolved]

Signed-off-by: Pratik Naik <pratiknaik@gmail.com>

actionpack/lib/action_view/helpers/date_helper.rb

@@ -572,10 +572,6 @@ module ActionView
         :year => 1, :month => 2, :day => 3, :hour => 4, :minute => 5, :second => 6
       }.freeze unless const_defined?('POSITION')
 
-      DEFAULT_PROMPTS = {
-        :year => 'Year', :month => 'Month', :day => 'Day', :hour => 'Hour', :minute => 'Minute', :second => 'Seconds'
-      }.freeze unless const_defined?('DEFAULT_PROMPTS')
-
       def initialize(datetime, options = {}, html_options = {})
         @options      = options.dup
         @html_options = html_options.dup
@@ -842,10 +838,10 @@ module ActionView
           when String
             prompt = options
           else
-            prompt = ActionView::Helpers::DateTimeSelector::DEFAULT_PROMPTS[type.to_sym]
+            prompt = I18n.translate(('datetime.prompts.' + type.to_s).to_sym, :locale => @options[:locale])
           end
 
-          prompt ? content_tag(:option, prompt, :value => '')  : ''
+          prompt ? content_tag(:option, prompt, :value => '') : ''
         end
 
         # Builds hidden input tag for date part and value

actionpack/lib/action_view/locale/en.yml

@@ -80,6 +80,13 @@
       over_x_years:
         one:   "over 1 year"
         other: "over {{count}} years"
+    prompts:
+      year:   "Year"
+      month:  "Month"
+      day:    "Day"
+      hour:   "Hour"
+      minute: "Minute"
+      second: "Seconds"
 
   activerecord:
     errors:

actionpack/test/template/date_helper_i18n_test.rb

@@ -78,6 +78,8 @@ class DateHelperSelectTagsI18nTests < Test::Unit::TestCase
 
   uses_mocha 'date_helper_select_tags_i18n_tests' do
     def setup
+      @prompt_defaults = {:year => 'Year', :month => 'Month', :day => 'Day', :hour => 'Hour', :minute => 'Minute', :second => 'Seconds'}
+
       I18n.stubs(:translate).with(:'date.month_names', :locale => 'en').returns Date::MONTHNAMES
     end
 
@@ -98,6 +100,15 @@ class DateHelperSelectTagsI18nTests < Test::Unit::TestCase
       select_month(8, :locale => 'en', :use_short_month => true)
     end
 
+    def test_date_or_time_select_translates_prompts
+      @prompt_defaults.each do |key, prompt|
+        I18n.expects(:translate).with(('datetime.prompts.' + key.to_s).to_sym, :locale => 'en').returns prompt
+      end
+
+      I18n.expects(:translate).with(:'date.order', :locale => 'en').returns [:year, :month, :day]
+      datetime_select('post', 'updated_at', :locale => 'en', :include_seconds => true, :prompt => true)
+    end
+
     # date_or_time_select
 
     def test_date_or_time_select_given_an_order_options_does_not_translate_order