Add `before?` and `after?` methods to date and time classes

Equality comparisons between dates and times can take some extra time to
comprehend. I tend to think of a date or time as "before" or "after"
another date or time, but I naturally read `<` and `>` as "less than"
and "greater than." This change seeks to make date/time comparisons more
human readable.

1 files changed, 12 insertions, 0 deletions

diff --git a/activesupport/test/core_ext/date_ext_test.rb b/activesupport/test/core_ext/date_ext_test.rb
index b8652884ce..8d3d575e0f 100644
--- a/activesupport/test/core_ext/date_ext_test.rb
+++ b/activesupport/test/core_ext/date_ext_test.rb
@@ -360,6 +360,18 @@ class DateExtCalculationsTest < ActiveSupport::TestCase
     end
   end
 
+  def test_before
+    assert_equal false, Date.new(2017, 3, 6).before?(Date.new(2017, 3, 5))
+    assert_equal false, Date.new(2017, 3, 6).before?(Date.new(2017, 3, 6))
+    assert_equal true, Date.new(2017, 3, 6).before?(Date.new(2017, 3, 7))
+  end
+
+  def test_after
+    assert_equal true, Date.new(2017, 3, 6).after?(Date.new(2017, 3, 5))
+    assert_equal false, Date.new(2017, 3, 6).after?(Date.new(2017, 3, 6))
+    assert_equal false, Date.new(2017, 3, 6).after?(Date.new(2017, 3, 7))
+  end
+
   def test_current_returns_date_today_when_zone_not_set
     with_env_tz "US/Central" do
       Time.stub(:now, Time.local(1999, 12, 31, 23)) do