fix(medusa): Price selection strategy bug with customer groups without customers (#4578)

* change up condition for joining price lists

* add changeset

* naming

* update tests

integration-tests/api/__tests__/admin/price-list.js

@@ -1299,9 +1299,11 @@ describe("/admin/price-lists", () => {
 
       expect(response.status).toBe(200)
       expect(response.data).toEqual({
-        ids: product1.variants.map((variant, i) => {
-          return getCustomPriceIdFromVariant(variant.id, i)
-        }),
+        ids: expect.arrayContaining(
+          product1.variants.map((variant, i) => {
+            return getCustomPriceIdFromVariant(variant.id, i)
+          })
+        ),
         object: "money-amount",
         deleted: true,
       })

integration-tests/api/__tests__/admin/variant.js

@@ -262,6 +262,12 @@ describe("/admin/products", () => {
           product_id: productData.id,
           sku: `test-product_filtering_by_variant_id-${i}`,
           title: `test-product_filtering_by_variant_id-${i}`,
+          options: [
+            {
+              option_id: "test-product_filtering_by_variant_id-option",
+              value: `Large-${i}`,
+            },
+          ],
         })
       }
 

integration-tests/api/__tests__/price-selection/index.js

@@ -6,6 +6,16 @@ const { useDb, initDb } = require("../../../environment-helpers/use-db")
 
 const adminSeeder = require("../../../helpers/admin-seeder")
 const promotionsSeeder = require("../../../helpers/price-selection-seeder")
+const {
+  Product,
+  ShippingProfileType,
+  ShippingProfile,
+  ProductOption,
+  CustomerGroup,
+  PriceList,
+  ProductVariant,
+  Customer,
+} = require("@medusajs/medusa")
 
 jest.setTimeout(30000)
 
@@ -449,6 +459,55 @@ describe("Promotions", () => {
       )
     })
 
+    it("should only join price lists with customer groups for the customer, not empty groups", async () => {
+      const api = useApi()
+
+      const authResponse = await api.post("/store/auth", {
+        email: "test5@email-pl.com",
+        password: "test",
+      })
+
+      const [authCookie] = authResponse.headers["set-cookie"][0].split(";")
+
+      const res = await api
+        .get("/store/products/test-product-pl?cart_id=test-cart", {
+          headers: {
+            Cookie: authCookie,
+          },
+        })
+        .catch((error) => console.log(error))
+
+      const variant = res.data.product.variants[0]
+
+      expect(variant.prices.length).toEqual(2)
+
+      expect(variant).toEqual(
+        expect.objectContaining({
+          id: "test-variant-pl",
+          calculated_price: 110,
+        })
+      )
+
+      expect(variant.prices.length).toEqual(2)
+      expect(variant.prices).toEqual(
+        expect.arrayContaining([
+          expect.objectContaining({
+            id: "test-price1120",
+            region_id: "test-region",
+            currency_code: "usd",
+            amount: 120,
+          }),
+          expect.objectContaining({
+            id: "test-price2120",
+            region_id: "test-region",
+            currency_code: "usd",
+            price_list_id: "pl_current_pl",
+            amount: 110,
+          }),
+        ])
+      )
+    })
+
     it("fetches product with groups and quantities in money amounts with login", async () => {
       const api = useApi()