Call Object#method if method accessor is called with arguments

lib/stripe/stripe_object.rb

@@ -241,7 +241,16 @@ module Stripe
           next if protected_fields.include?(k)
           next if @@permanent_attributes.include?(k)
 
-          define_method(k) { @values[k] }
+          if k == :method
+            # Object#method is a built-in Ruby method that accepts a symbol
+            # and returns the corresponding Method object. Because the API may
+            # also use `method` as a field name, we check the arity of *args
+            # to decide whether to act as a getter or call the parent method.
+            define_method(k) { |*args| args.empty? ? @values[k] : super(*args) }
+          else
+            define_method(k) { @values[k] }
+          end
+
           define_method(:"#{k}=") do |v|
             if v == ""
               raise ArgumentError, "You cannot set #{k} to an empty string. " \

test/stripe/stripe_object_test.rb

@@ -423,5 +423,17 @@ module Stripe
       expected_hash = { api_key: "apikey" }
       assert_equal expected_hash, m.instance_variable_get("@opts")
     end
+
+    context "#method" do
+      should "act as a getter is not argument is provided" do
+        obj = Stripe::StripeObject.construct_from(id: 1, method: "foo")
+        assert_equal "foo", obj.method
+      end
+
+      should "call Object#method if an argument is provided" do
+        obj = Stripe::StripeObject.construct_from(id: 1, method: "foo")
+        assert obj.method(:id).is_a?(Method)
+      end
+    end
   end
 end