chore(medusa-test-utils): Add custom link loading before syncing (#9249)

**What**
Include custom links to be loaded from the medusa integration test runner

packages/core/medusa-test-utils/src/medusa-test-runner-utils/use-db.ts

@@ -1,4 +1,7 @@
 import type { MedusaAppLoader } from "@medusajs/framework"
+import { join } from "path"
+import { MedusaContainer } from "@medusajs/types"
+import { ContainerRegistrationKeys } from "@medusajs/utils"
 
 /**
  * Initiates the database connection
@@ -29,8 +32,14 @@ export async function migrateDatabase(appLoader: MedusaAppLoader) {
 /**
  * Syncs links with the databse
  */
-export async function syncLinks(appLoader: MedusaAppLoader) {
+export async function syncLinks(
+  appLoader: MedusaAppLoader,
+  directory: string,
+  container: MedusaContainer
+) {
   try {
+    await loadCustomLinks(directory, container)
+
     const planner = await appLoader.getLinksExecutionPlanner()
     const actionPlan = await planner.createPlan()
     actionPlan.forEach((action) => {
@@ -42,3 +51,22 @@ export async function syncLinks(appLoader: MedusaAppLoader) {
     throw err
   }
 }
+
+async function loadCustomLinks(directory: string, container: MedusaContainer) {
+  // TODO: move to framework once settle down
+  const { getResolvedPlugins } = await import(
+    // @ts-expect-error
+    "@medusajs/medusa/dist/loaders/helpers/resolve-plugins"
+  )
+
+  const configModule = container.resolve(
+    ContainerRegistrationKeys.CONFIG_MODULE
+  )
+  const plugins = getResolvedPlugins(directory, configModule, true) || []
+  const linksSourcePaths = plugins.map((plugin) =>
+    join(plugin.resolve, "links")
+  )
+
+  const { LinkLoader } = await import("@medusajs/framework")
+  await new LinkLoader(linksSourcePaths).load()
+}

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

@@ -18,8 +18,8 @@ import {
 import { applyEnvVarsToProcess } from "./medusa-test-runner-utils/utils"
 
 const DB_HOST = process.env.DB_HOST
-const DB_USERNAME = process.env.DB_USERNAME ?? ''
-const DB_PASSWORD = process.env.DB_PASSWORD ?? ''
+const DB_USERNAME = process.env.DB_USERNAME ?? ""
+const DB_PASSWORD = process.env.DB_PASSWORD ?? ""
 
 const pgGodCredentials = {
   user: DB_USERNAME,
@@ -179,7 +179,7 @@ export function medusaIntegrationTestRunner({
 
     console.log(`Migrating database with core migrations and links ${dbName}`)
     await migrateDatabase(appLoader)
-    await syncLinks(appLoader)
+    await syncLinks(appLoader, cwd, container)
     await clearInstances()
 
     let containerRes: MedusaContainer = container
@@ -215,7 +215,7 @@ export function medusaIntegrationTestRunner({
     if (inApp) {
       console.log(`Migrating database with core migrations and links ${dbName}`)
       await migrateDatabase(appLoader)
-      await syncLinks(appLoader)
+      await syncLinks(appLoader, cwd, containerRes)
     }
 
     const axios = (await import("axios")).default.default