Added method `#eql?` to `ActiveSupport::Duration`, in addition to `#==`.

Currently, the following returns `false`, contrary to expectation:

    1.minute.eql?(1.minute)

Adding method `#eql?` will make this behave like expected. Method `#eql?` is
just a bit stricter than `#==`, as it checks whether the argument is also a
uration. Their parts may be different though.

    1.minute.eql?(60.seconds)  # => true
    1.minute.eql?(60)          # => false

1 files changed, 6 insertions, 0 deletions

diff --git a/activesupport/lib/active_support/duration.rb b/activesupport/lib/active_support/duration.rb
index 2cb1f408b6..7cd27717f9 100644
--- a/activesupport/lib/active_support/duration.rb
+++ b/activesupport/lib/active_support/duration.rb
@@ -49,6 +49,12 @@ module ActiveSupport
       end
     end
 
+    # Returns +true+ if +other+ is also a Duration instance, which has the
+    # same parts as this one.
+    def eql?(other)
+      Duration === other && other.value.eql?(value)
+    end
+
     def self.===(other) #:nodoc:
       other.is_a?(Duration)
     rescue ::NoMethodError