chore: rename source to linkable in defineLink options (#8016)

* chore: rename source to linkable in defineLink options

* rm unused const

integration-tests/modules/__tests__/link-modules/define-link.spec.ts

@@ -9,14 +9,6 @@ jest.setTimeout(50000)
 medusaIntegrationTestRunner({
   testSuite: ({ getContainer }) => {
     describe("defineLink", () => {
-      let appContainer
-      let remoteQuery
-
-      beforeAll(async () => {
-        appContainer = getContainer()
-        remoteQuery = appContainer.resolve("remoteQuery")
-      })
-
       it("should generate a proper link definition", async () => {
         const currencyLinks = CurrencyModule.linkable
         const regionLinks = RegionModule.linkable
@@ -95,6 +87,88 @@ medusaIntegrationTestRunner({
           ],
         })
       })
+
+      it("should generate a proper link definition passing an object as option", async () => {
+        const currencyLinks = CurrencyModule.linkable
+        const regionLinks = RegionModule.linkable
+
+        const link = defineLink(currencyLinks.currency, {
+          linkable: regionLinks.region,
+          isList: true,
+        })
+
+        const linkDefinition = MedusaModule.getCustomLinks()
+          .map((linkDefinition: any) => {
+            const definition = linkDefinition(
+              MedusaModule.getAllJoinerConfigs()
+            )
+            return definition.serviceName === link.serviceName && definition
+          })
+          .filter(Boolean)[0]
+
+        expect(link.serviceName).toEqual("currencyCurrencyRegionRegionLink")
+        expect(linkDefinition).toEqual({
+          serviceName: "currencyCurrencyRegionRegionLink",
+          isLink: true,
+          alias: [
+            {
+              name: ["currency_region"],
+              args: {
+                entity: "LinkCurrencyCurrencyRegionRegion",
+              },
+            },
+          ],
+          primaryKeys: ["id", "currency_code", "region_id"],
+          relationships: [
+            {
+              serviceName: "currency",
+              primaryKey: "code",
+              foreignKey: "currency_code",
+              alias: "currency",
+              args: {
+                methodSuffix: "Currencies",
+              },
+            },
+            {
+              serviceName: "region",
+              primaryKey: "id",
+              foreignKey: "region_id",
+              alias: "region",
+              args: {
+                methodSuffix: "Regions",
+              },
+            },
+          ],
+          extends: [
+            {
+              serviceName: "currency",
+              fieldAlias: {
+                regions: "region_link.region",
+              },
+              relationship: {
+                serviceName: "currencyCurrencyRegionRegionLink",
+                primaryKey: "currency_code",
+                foreignKey: "code",
+                alias: "region_link",
+                isList: true,
+              },
+            },
+            {
+              serviceName: "region",
+              fieldAlias: {
+                currency: "currency_link.currency",
+              },
+              relationship: {
+                serviceName: "currencyCurrencyRegionRegionLink",
+                primaryKey: "region_id",
+                foreignKey: "id",
+                alias: "currency_link",
+                isList: false,
+              },
+            },
+          ],
+        })
+      })
     })
   },
 })