feat: Add basic CRUD functionality to store module (#6510)

Adds the core model and basic CRUD around it.

Note: The store model is not complete, but I prefer doing smaller PRs so it's easier to do a proper review. Adding currencies will be a follow-up PR.

packages/store/integration-tests/__tests__/store-module-service.spec.ts

@@ -1,6 +1,7 @@
 import { Modules } from "@medusajs/modules-sdk"
 import { IStoreModuleService } from "@medusajs/types"
 import { moduleIntegrationTestRunner, SuiteOptions } from "medusa-test-utils"
+import { createStoreFixture } from "../__fixtures__"
 
 jest.setTimeout(100000)
 
@@ -11,9 +12,88 @@ moduleIntegrationTestRunner({
     service,
   }: SuiteOptions<IStoreModuleService>) => {
     describe("Store Module Service", () => {
-      describe("noop", function () {
-        it("should run", function () {
-          expect(true).toBe(true)
+      describe("creating a store", () => {
+        it("should get created successfully", async function () {
+          const store = await service.create(createStoreFixture)
+
+          expect(store).toEqual(
+            expect.objectContaining({
+              name: "Test store",
+              default_sales_channel_id: "test-sales-channel",
+              default_region_id: "test-region",
+              metadata: {
+                test: "test",
+              },
+            })
+          )
+        })
+      })
+
+      describe("upserting a store", () => {
+        it("should get created if it does not exist", async function () {
+          const store = await service.upsert(createStoreFixture)
+
+          expect(store).toEqual(
+            expect.objectContaining({
+              name: "Test store",
+              default_sales_channel_id: "test-sales-channel",
+              default_region_id: "test-region",
+              metadata: {
+                test: "test",
+              },
+            })
+          )
+        })
+
+        it("should get created if it does not exist", async function () {
+          const createdStore = await service.upsert(createStoreFixture)
+          const upsertedStore = await service.upsert({ name: "Upserted store" })
+
+          expect(upsertedStore).toEqual(
+            expect.objectContaining({
+              name: "Upserted store",
+            })
+          )
+          expect(upsertedStore.id).not.toEqual(createdStore.id)
+        })
+      })
+
+      describe("updating a store", () => {
+        it("should update the name successfully", async function () {
+          const createdStore = await service.create(createStoreFixture)
+          const updatedStore = await service.update(createdStore.id, {
+            title: "Updated store",
+          })
+          expect(updatedStore.title).toEqual("Updated store")
+        })
+      })
+
+      describe("deleting a store", () => {
+        it("should successfully delete existing stores", async function () {
+          const createdStore = await service.create([
+            createStoreFixture,
+            createStoreFixture,
+          ])
+
+          await service.delete([createdStore[0].id, createdStore[1].id])
+
+          const storeInDatabase = await service.list()
+          expect(storeInDatabase).toHaveLength(0)
+        })
+      })
+
+      describe("retrieving a store", () => {
+        it("should successfully return all existing stores", async function () {
+          await service.create([
+            createStoreFixture,
+            { ...createStoreFixture, name: "Another store" },
+          ])
+
+          const storesInDatabase = await service.list()
+          expect(storesInDatabase).toHaveLength(2)
+          expect(storesInDatabase.map((s) => s.name)).toEqual(
+            expect.arrayContaining(["Test store", "Another store"])
+          )
         })
       })
     })