feat(medusa): invalidate price selection caching within update request (#3553)

* feat: invalidate price selection caching on update

* feat: add `onVariantsPricesUpdate` to PriceSelectionStrategy

* fix: update units

* fix: import

* Create .changeset/tame-pillows-heal.md

* fix: address feedback

* refactor: make `onVariantsPricesUpdate` optional

---------

Co-authored-by: fPolic <frane@medusajs.com>
Co-authored-by: Oliver Windall Juhl <59018053+olivermrbl@users.noreply.github.com>

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

@@ -44,7 +44,7 @@ describe("/admin/products", () => {
     dbConnection = await initDb({ cwd })
     medusaProcess = await setupServer({
       cwd,
-      env: { MEDUSA_FF_PRODUCT_CATEGORIES: true }
+      env: { MEDUSA_FF_PRODUCT_CATEGORIES: true },
     })
   })
 
@@ -1784,7 +1784,9 @@ describe("/admin/products", () => {
         })
 
       expect(response.status).toEqual(200)
-      const variant = response.data.product.variants.find(v => v.id === variantId)
+      const variant = response.data.product.variants.find(
+        (v) => v.id === variantId
+      )
       expect(variant.prices.length).toEqual(1)
       expect(variant.prices).toEqual(
         expect.arrayContaining([

integration-tests/api/medusa-config.js

@@ -4,6 +4,7 @@ const DB_PASSWORD = process.env.DB_PASSWORD
 const DB_NAME = process.env.DB_TEMP_NAME
 
 const redisUrl = process.env.REDIS_URL || "redis://localhost:6379"
+const cacheTTL = process.env.CACHE_TTL || 15
 
 module.exports = {
   plugins: [],
@@ -17,11 +18,7 @@ module.exports = {
   modules: {
     cacheService: {
       resolve: "@medusajs/cache-inmemory",
-      // don't set cache since this is shared between tests
-      // and since we have "test-product" / "test-variant" as ids
-      // in a bunch of tests, this could cause that incorrect data is returned
-      // (e.g. price selection caches calculations under `ps:${variantId}`)
-      options: { ttl: 0 },
+      options: { ttl: cacheTTL },
     },
   },
 }