Added Fixnum#ago/until, Fixnum#since/from_now #450 [bitsweat]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@371 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/CHANGELOG

@@ -1,3 +1,5 @@
+* Added Fixnum#ago/until, Fixnum#since/from_now #450 [bitsweat]
+
 * Added that Inflector now accepts Symbols and Classes by calling .to_s on the word supplied
 
 * Added time unit extensions to Fixnum that'll return the period in seconds, like 2.days + 4.hours.

activesupport/lib/core_ext/fixnum_ext.rb

@@ -33,4 +33,20 @@ class Fixnum
     self * 365.days
   end
   alias :year :years
-end
+
+  # Reads best without arguments:  10.minutes.ago
+  def ago(time = Time.now)
+    time - self
+  end
+
+  # Reads best with argument:  10.minutes.until(time)
+  alias :until :ago
+
+  # Reads best with argument:  10.minutes.since(time)
+  def since(time = Time.now)
+    time + self
+  end
+
+  # Reads best without arguments:  10.minutes.from_now
+  alias :from_now :since
+end

activesupport/test/core_ext/fixnum_ext_test.rb

@@ -2,15 +2,22 @@ require 'test/unit'
 require File.dirname(__FILE__) + '/../../lib/core_ext/fixnum_ext'
 
 class FixnumExtTest < Test::Unit::TestCase
-  def test_time_units
-    expected = {
+  def setup
+    @now = Time.now
+    @seconds = {
       1.minute   => 60,
       10.minutes => 600,
       1.hour + 15.minutes => 4500,
       2.days + 4.hours + 30.minutes => 189000,
       5.years + 1.month + 1.fortnight => 161481600
     }
-
-    expected.each { |actual, expected| assert_equal expected, actual }
   end
-end
+
+  def test_time_units
+    @seconds.each do |actual, expected|
+      assert_equal expected, actual
+      assert_equal expected.since(@now),  @now + actual
+      assert_equal expected.until(@now),  @now - actual
+    end
+  end
+end