[codegen] Update API Resources (#825)

* Codegen for openapi c806fa1

* Add tests

lib/stripe/resources/subscription_item.rb

@@ -6,9 +6,12 @@ module Stripe
     include Stripe::APIOperations::Delete
     extend Stripe::APIOperations::List
     include Stripe::APIOperations::Save
+    extend Stripe::APIOperations::NestedResource
 
     OBJECT_NAME = "subscription_item".freeze
 
+    nested_resource_class_methods :usage_record, operations: %i[create]
+
     def usage_record_summaries(params = {}, opts = {})
       resp, opts = request(:get, resource_url + "/usage_record_summaries", params, opts)
       Util.convert_to_stripe_object(resp.data, opts)

lib/stripe/resources/subscription_schedule.rb

@@ -28,10 +28,5 @@ module Stripe
         opts: opts
       )
     end
-
-    def revisions(params = {}, opts = {})
-      resp, opts = request(:get, resource_url + "/revisions", params, opts)
-      Util.convert_to_stripe_object(resp.data, opts)
-    end
   end
 end

test/stripe/subscription_item_test.rb

@@ -59,5 +59,17 @@ module Stripe
         assert item.is_a?(Stripe::SubscriptionItem)
       end
     end
+
+    context "#create_usage_record" do
+      should "create a usage record" do
+        Stripe::SubscriptionItem.create_usage_record(
+          "si_123",
+          quantity: 5000,
+          timestamp: Time.now.to_i,
+          action: "increment"
+        )
+        assert_requested :post, "#{Stripe.api_base}/v1/subscription_items/si_123/usage_records"
+      end
+    end
   end
 end