add integration tests

packages/medusa/src/api/routes/admin/discounts/create-discount.js

@@ -36,6 +36,9 @@ import { MedusaError, Validator } from "medusa-core-utils"
  *             type: array
  *             items:
  *               type: string
+ *           usage_limit:
+ *             type: number
+ *             description: Maximum times the discount can be used
  *           metadata:
  *             description: An optional set of key-value pairs to hold additional information.
  *             type: object
@@ -57,21 +60,21 @@ export default async (req, res) => {
     is_dynamic: Validator.boolean().default(false),
     rule: Validator.object()
       .keys({
-        description: Validator.string().optional(),
+        description: Validator.string().required(),
         type: Validator.string().required(),
         value: Validator.number()
           .positive()
           .required(),
         allocation: Validator.string().required(),
         valid_for: Validator.array().items(Validator.string()),
-        usage_limit: Validator.number()
-          .positive()
-          .optional(),
       })
       .required(),
     is_disabled: Validator.boolean().default(false),
     starts_at: Validator.date().optional(),
     ends_at: Validator.date().optional(),
+    usage_limit: Validator.number()
+      .positive()
+      .optional(),
     regions: Validator.array()
       .items(Validator.string())
       .optional(),

packages/medusa/src/api/routes/admin/discounts/update-discount.js

@@ -64,14 +64,14 @@ export default async (req, res) => {
         value: Validator.number().required(),
         allocation: Validator.string().required(),
         valid_for: Validator.array().items(Validator.string()),
-        usage_limit: Validator.number()
-          .positive()
-          .optional(),
       })
       .optional(),
     is_disabled: Validator.boolean().optional(),
     starts_at: Validator.date().optional(),
     ends_at: Validator.date().optional(),
+    usage_limit: Validator.number()
+      .positive()
+      .optional(),
     regions: Validator.array()
       .items(Validator.string())
       .optional(),