[READY FOR REVIEW] MONGOID-5666 Bugfix: Define #resizable class method for Set

lib/mongoid/extensions/set.rb

@@ -59,6 +59,16 @@ def mongoize(object)
           when ::Array then ::Array.mongoize(object).uniq
           end
         end
+
+        # Returns whether the object's size can be changed.
+        #
+        # @example Is the object resizable?
+        #   Set.resizable?
+        #
+        # @return [ true ] true.
+        def resizable?
+          true
+        end
       end
     end
   end

spec/mongoid/extensions/array_spec.rb

@@ -362,7 +362,7 @@
     end
   end
 
-  describe "#resiable?" do
+  describe "#resizable?" do
 
     it "returns true" do
       expect([]).to be_resizable

spec/mongoid/extensions/set_spec.rb

@@ -137,4 +137,18 @@
       end
     end
   end
+
+  describe ".resizable?" do
+
+    it "returns true" do
+      expect(Set).to be_resizable
+    end
+  end
+
+  describe "#resizable?" do
+
+    it "returns true" do
+      expect(Set.new).to be_resizable
+    end
+  end
 end