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__/promotion/admin/delete-campaign.spec.ts

@@ -1,12 +1,7 @@
-import { initDb, useDb } from "../../../../environment-helpers/use-db"
-
 import { IPromotionModuleService } from "@medusajs/types"
 import { ModuleRegistrationName } from "@medusajs/modules-sdk"
 import { createAdminUser } from "../../../helpers/create-admin-user"
-import { getContainer } from "../../../../environment-helpers/use-container"
-import path from "path"
-import { startBootstrapApp } from "../../../../environment-helpers/bootstrap-app"
-import { useApi } from "../../../../environment-helpers/use-api"
+import { medusaIntegrationTestRunner } from "medusa-test-utils"
 
 jest.setTimeout(50000)
 
@@ -15,59 +10,47 @@ const adminHeaders = {
   headers: { "x-medusa-access-token": "test_token" },
 }
 
-describe("DELETE /admin/campaigns/:id", () => {
-  let dbConnection
-  let appContainer
-  let shutdownServer
-  let promotionModuleService: IPromotionModuleService
+medusaIntegrationTestRunner({
+  env,
+  testSuite: ({ dbConnection, getContainer, api }) => {
+    describe("DELETE /admin/campaigns/:id", () => {
+      let appContainer
+      let promotionModuleService: IPromotionModuleService
 
-  beforeAll(async () => {
-    const cwd = path.resolve(path.join(__dirname, "..", "..", ".."))
-    dbConnection = await initDb({ cwd, env } as any)
-    shutdownServer = await startBootstrapApp({ cwd, env })
-    appContainer = getContainer()
-    promotionModuleService = appContainer.resolve(
-      ModuleRegistrationName.PROMOTION
-    )
-  })
+      beforeAll(async () => {
+        appContainer = getContainer()
+        promotionModuleService = appContainer.resolve(
+          ModuleRegistrationName.PROMOTION
+        )
+      })
 
-  afterAll(async () => {
-    const db = useDb()
-    await db.shutdown()
-    await shutdownServer()
-  })
+      beforeEach(async () => {
+        await createAdminUser(dbConnection, adminHeaders, appContainer)
+      })
 
-  beforeEach(async () => {
-    await createAdminUser(dbConnection, adminHeaders)
-  })
+      it("should delete campaign successfully", async () => {
+        const [createdCampaign] = await promotionModuleService.createCampaigns([
+          {
+            name: "test",
+            campaign_identifier: "test",
+            starts_at: new Date("01/01/2024"),
+            ends_at: new Date("01/01/2025"),
+          },
+        ])
 
-  afterEach(async () => {
-    const db = useDb()
-    await db.teardown()
-  })
+        const deleteRes = await api.delete(
+          `/admin/campaigns/${createdCampaign.id}`,
+          adminHeaders
+        )
 
-  it("should delete campaign successfully", async () => {
-    const [createdCampaign] = await promotionModuleService.createCampaigns([
-      {
-        name: "test",
-        campaign_identifier: "test",
-        starts_at: new Date("01/01/2024"),
-        ends_at: new Date("01/01/2025"),
-      },
-    ])
+        expect(deleteRes.status).toEqual(200)
 
-    const api = useApi() as any
-    const deleteRes = await api.delete(
-      `/admin/campaigns/${createdCampaign.id}`,
-      adminHeaders
-    )
+        const campaigns = await promotionModuleService.listCampaigns({
+          id: [createdCampaign.id],
+        })
 
-    expect(deleteRes.status).toEqual(200)
-
-    const campaigns = await promotionModuleService.listCampaigns({
-      id: [createdCampaign.id],
+        expect(campaigns.length).toEqual(0)
+      })
     })
-
-    expect(campaigns.length).toEqual(0)
-  })
+  },
 })