Implement Decoratable#==

Now model == decorator as well as decorator == model

lib/draper/decoratable.rb

@@ -21,7 +21,7 @@ module Draper::Decoratable
     false
   end
 
-  def ===(other)
+  def ==(other)
     super || (other.respond_to?(:source) && super(other.source))
   end
 

spec/draper/decoratable_spec.rb

@@ -45,6 +45,34 @@ describe Draper::Decoratable do
     end
   end
 
+  describe "#==" do
+    context "with itself" do
+      it "returns true" do
+        (subject == subject).should be_true
+      end
+    end
+
+    context "with another instance" do
+      it "returns false" do
+        (subject == Product.new).should be_false
+      end
+    end
+
+    context "with a decorated version of itself" do
+      it "returns true" do
+        decorator = double(source: subject)
+        (subject == decorator).should be_true
+      end
+    end
+
+    context "with a decorated other instance" do
+      it "returns false" do
+        decorator = double(source: Product.new)
+        (subject == decorator).should be_false
+      end
+    end
+  end
+
   describe "#===" do
     context "with itself" do
       it "returns true" do