feat: Add support for exporting products in backend (#8214)

CLOSES CC-221
CLOSES CC-223
CLOSES CC-224

packages/core/medusa-test-utils/src/events.ts

@@ -1,4 +1,5 @@
 import { IEventBusModuleService } from "@medusajs/types"
+import { EventEmitter } from "events"
 
 // Allows you to wait for all subscribers to execute for a given event. Only works with the local event bus.
 export const waitSubscribersExecution = (
@@ -6,23 +7,36 @@ export const waitSubscribersExecution = (
   eventBus: IEventBusModuleService
 ) => {
   const subscriberPromises: Promise<any>[] = []
+  const eventEmitter: EventEmitter = (eventBus as any).eventEmitter_
 
-  ;(eventBus as any).eventEmitter_.listeners(eventName).forEach((listener) => {
-    ;(eventBus as any).eventEmitter_.removeListener("order.created", listener)
-
+  // If there are no existing listeners, resolve once the event happens. Otherwise, wrap the existing subscribers in a promise and resolve once they are done.
+  if (!eventEmitter.listeners(eventName).length) {
     let ok, nok
     const promise = new Promise((resolve, reject) => {
       ok = resolve
       nok = reject
     })
+
     subscriberPromises.push(promise)
+    eventEmitter.on(eventName, ok)
+  } else {
+    eventEmitter.listeners(eventName).forEach((listener: any) => {
+      eventEmitter.removeListener(eventName, listener)
 
-    const newListener = async (...args2) => {
-      return await listener.apply(eventBus, args2).then(ok).catch(nok)
-    }
+      let ok, nok
+      const promise = new Promise((resolve, reject) => {
+        ok = resolve
+        nok = reject
+      })
+      subscriberPromises.push(promise)
 
-    ;(eventBus as any).eventEmitter_.on("order.created", newListener)
-  })
+      const newListener = async (...args2) => {
+        return await listener.apply(eventBus, args2).then(ok).catch(nok)
+      }
+
+      eventEmitter.on(eventName, newListener)
+    })
+  }
 
   return Promise.all(subscriberPromises)
 }