feat(medusa): Add endpoints specific to DiscountConditions (#1355)

integration-tests/api/factories/simple-discount-condition-factory.ts

@@ -13,6 +13,7 @@ import faker from "faker"
 import { Connection } from "typeorm"
 
 export type DiscuntConditionFactoryData = {
+  id?: string
   rule_id: string
   type: DiscountConditionType
   operator: DiscountConditionOperator
@@ -93,11 +94,17 @@ export const simpleDiscountConditionFactory = async (
     resources = data.customer_groups
   }
 
-  const condToSave = manager.create(DiscountCondition, {
+  const toCreate = {
     type: data.type,
     operator: data.operator,
     discount_rule_id: data.rule_id,
-  })
+  }
+
+  if (data.id) {
+    toCreate["id"] = data.id
+  }
+
+  const condToSave = manager.create(DiscountCondition, toCreate)
 
   const { conditionTable, resourceKey } = getJoinTableResourceIdentifiers(
     data.type