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__/currency/admin/currency.spec.ts

@@ -1,12 +1,5 @@
-import { ModuleRegistrationName } from "@medusajs/modules-sdk"
-import { ICurrencyModuleService } from "@medusajs/types"
-import path from "path"
-import { startBootstrapApp } from "../../../../environment-helpers/bootstrap-app"
-import { useApi } from "../../../../environment-helpers/use-api"
-import { getContainer } from "../../../../environment-helpers/use-container"
-import { initDb, useDb } from "../../../../environment-helpers/use-db"
-import { DataSource } from "typeorm"
 import { createAdminUser } from "../../../helpers/create-admin-user"
+import { medusaIntegrationTestRunner } from "medusa-test-utils"
 
 jest.setTimeout(50000)
 
@@ -15,53 +8,39 @@ const adminHeaders = {
   headers: { "x-medusa-access-token": "test_token" },
 }
 
-describe("Currency - Admin", () => {
-  let dbConnection: DataSource
-  let appContainer
-  let shutdownServer
-  let service: ICurrencyModuleService
+medusaIntegrationTestRunner({
+  env,
+  testSuite: ({ dbConnection, api, getContainer }) => {
+    describe("Currency - Admin", () => {
+      let container
 
-  beforeAll(async () => {
-    const cwd = path.resolve(path.join(__dirname, "..", "..", ".."))
-    dbConnection = await initDb({ cwd, env } as any)
-    shutdownServer = await startBootstrapApp({ cwd, env })
-    appContainer = getContainer()
-    service = appContainer.resolve(ModuleRegistrationName.CURRENCY)
-  })
+      beforeEach(async () => {
+        container = getContainer()
+        await createAdminUser(dbConnection, adminHeaders, container)
+      })
 
-  afterAll(async () => {
-    const db = useDb()
-    await db.shutdown()
-    await shutdownServer()
-  })
+      it("should correctly retrieve and list currencies", async () => {
+        const listResp = await api.get("/admin/currencies", adminHeaders)
 
-  beforeEach(async () => {
-    await createAdminUser(dbConnection, adminHeaders)
-  })
+        expect(listResp.data.currencies).toEqual(
+          expect.arrayContaining([
+            expect.objectContaining({
+              code: "aud",
+            }),
+            expect.objectContaining({
+              code: "cad",
+            }),
+          ])
+        )
 
-  afterEach(async () => {
-    const db = useDb()
-    await db.teardown()
-  })
-
-  it("should correctly retrieve and list currencies", async () => {
-    const api = useApi() as any
-    const listResp = await api.get("/admin/currencies", adminHeaders)
-
-    expect(listResp.data.currencies).toEqual(
-      expect.arrayContaining([
-        expect.objectContaining({
-          code: "aud",
-        }),
-        expect.objectContaining({
-          code: "cad",
-        }),
-      ])
-    )
-
-    const retrieveResp = await api.get(`/admin/currencies/aud`, adminHeaders)
-    expect(retrieveResp.data.currency).toEqual(
-      listResp.data.currencies.find((c) => c.code === "aud")
-    )
-  })
+        const retrieveResp = await api.get(
+          `/admin/currencies/aud`,
+          adminHeaders
+        )
+        expect(retrieveResp.data.currency).toEqual(
+          listResp.data.currencies.find((c) => c.code === "aud")
+        )
+      })
+    })
+  },
 })