Chore/integration tests modules utils (#6581)

new wrapper for medusa integration tests.
for now it is only applied to the modules directory, but it could be used in the api integration tests or any other integrations that requires a db and a server up and running. 

It is not perfect, but I wanted to have something working and centralised before improving it, also avoiding too many conflicts with other prs

integration-tests/modules/__tests__/invites/create-invite.spec.ts

@@ -1,11 +1,5 @@
-import { initDb, useDb } from "../../../environment-helpers/use-db"
-
-import path from "path"
-import { startBootstrapApp } from "../../../environment-helpers/bootstrap-app"
-import { useApi } from "../../../environment-helpers/use-api"
-import adminSeeder from "../../../helpers/admin-seeder"
-import { AxiosInstance } from "axios"
 import { createAdminUser } from "../../helpers/create-admin-user"
+import { medusaIntegrationTestRunner } from "medusa-test-utils"
 
 jest.setTimeout(50000)
 
@@ -14,43 +8,26 @@ const adminHeaders = {
   headers: { "x-medusa-access-token": "test_token" },
 }
 
-describe("POST /admin/invites", () => {
-  let dbConnection
-  let shutdownServer
+medusaIntegrationTestRunner({
+  env,
+  testSuite: ({ dbConnection, getContainer, api }) => {
+    describe("POST /admin/invites", () => {
+      beforeEach(async () => {
+        await createAdminUser(dbConnection, adminHeaders, getContainer())
+      })
 
-  beforeAll(async () => {
-    const cwd = path.resolve(path.join(__dirname, "..", ".."))
-    dbConnection = await initDb({ cwd, env } as any)
-    shutdownServer = await startBootstrapApp({ cwd, env })
-  })
+      it("create an invite", async () => {
+        const body = {
+          email: "test_member@test.com",
+        }
 
-  beforeEach(async () => {
-    await createAdminUser(dbConnection, adminHeaders)
-  })
+        const response = await api.post(`/admin/invites`, body, adminHeaders)
 
-  afterAll(async () => {
-    const db = useDb()
-    await db.shutdown()
-    await shutdownServer()
-  })
-
-  afterEach(async () => {
-    const db = useDb()
-    await db.teardown()
-  })
-
-  it("create an invite", async () => {
-    const api = useApi()! as AxiosInstance
-
-    const body = {
-      email: "test_member@test.com",
-    }
-
-    const response = await api.post(`/admin/invites`, body, adminHeaders)
-
-    expect(response.status).toEqual(200)
-    expect(response.data).toEqual({
-      invite: expect.objectContaining(body),
+        expect(response.status).toEqual(200)
+        expect(response.data).toEqual({
+          invite: expect.objectContaining(body),
+        })
+      })
     })
-  })
+  },
 })