feat: restructure events payload (#8143)

* refactor: restructure events payload

Breaking change: This PR changes the event payload accepted by the event
listeners

* refactor: fix failing tests and implement feedback

* add integration tests

* fix timeout

---------

Co-authored-by: Adrien de Peretti <adrien.deperetti@gmail.com>

integration-tests/modules/__tests__/event-bus/index.spec.ts

@@ -0,0 +1,50 @@
+import { medusaIntegrationTestRunner } from "medusa-test-utils"
+import { MedusaContainer } from "@medusajs/types"
+import { composeMessage, ModuleRegistrationName } from "@medusajs/utils"
+import testEventPayloadHandlerMock from "../../dist/subscribers/test-event-payload"
+
+jest.setTimeout(30000)
+
+medusaIntegrationTestRunner({
+  testSuite: ({ getContainer }) => {
+    let container!: MedusaContainer
+
+    describe("EventBusModule", () => {
+      beforeAll(() => {
+        container = getContainer()
+      })
+
+      it(`should emit event with the expected shape to be received by the subscribers`, async () => {
+        const eventBus = container.resolve(ModuleRegistrationName.EVENT_BUS)
+        const eventName = "test-event-payload"
+
+        await eventBus.emit(
+          composeMessage(eventName, {
+            data: {
+              test: "foo",
+            },
+            object: "object",
+            source: "source",
+            action: "action",
+          })
+        )
+
+        expect(testEventPayloadHandlerMock).toHaveBeenCalled()
+        expect(
+          testEventPayloadHandlerMock.mock.calls[0][0].pluginOptions
+        ).toEqual({})
+        expect(testEventPayloadHandlerMock.mock.calls[0][0].event).toEqual({
+          name: eventName,
+          data: {
+            test: "foo",
+          },
+          metadata: {
+            object: "object",
+            source: "source",
+            action: "action",
+          },
+        })
+      })
+    })
+  },
+})

integration-tests/modules/__tests__/notification/admin/notification.spec.ts

@@ -173,7 +173,7 @@ medusaIntegrationTestRunner({
           const logSpy = jest.spyOn(logger, "info")
 
           await eventBus.emit({
-            eventName: "order.created",
+            name: "order.created",
             data: {
               order: {
                 id: "1234",