feat(medusa): Add line item totals to cart totals decoration (#1740)

integration-tests/api/__tests__/taxes/cart.js

@@ -0,0 +1,237 @@
+const path = require("path")
+
+const setupServer = require("../../../helpers/setup-server")
+const { useApi } = require("../../../helpers/use-api")
+const { useDb, initDb } = require("../../../helpers/use-db")
+const {
+  simpleDiscountFactory,
+  simpleRegionFactory,
+  simpleProductFactory,
+  simpleProductTaxRateFactory,
+} = require("../../factories")
+
+const adminSeeder = require("../../helpers/admin-seeder")
+
+jest.setTimeout(30000)
+
+describe("Cart Totals Calculations", () => {
+  let medusaProcess
+  let dbConnection
+
+  beforeAll(async () => {
+    const cwd = path.resolve(path.join(__dirname, "..", ".."))
+    dbConnection = await initDb({ cwd })
+    medusaProcess = await setupServer({ cwd })
+  })
+
+  afterAll(async () => {
+    const db = useDb()
+    await db.shutdown()
+
+    medusaProcess.kill()
+  })
+
+  beforeEach(async () => {
+    try {
+      await adminSeeder(dbConnection)
+    } catch (err) {
+      console.log(err)
+      throw err
+    }
+  })
+
+  afterEach(async () => {
+    const db = useDb()
+    await db.teardown()
+  })
+
+  it("sets correct line item totals for a cart with item of price 100 and tax rate 10", async () => {
+    const api = useApi()
+
+    const region = await simpleRegionFactory(dbConnection)
+    const product = await simpleProductFactory(dbConnection)
+    await simpleProductTaxRateFactory(dbConnection, {
+      product_id: product.id,
+      rate: {
+        region_id: region.id,
+        rate: 10,
+      },
+    })
+
+    // create cart
+    const { cart } = await api
+      .post("/store/carts", {
+        region_id: region.id,
+      })
+      .then((res) => res.data)
+
+    // add product to cart
+    const res = await api.post(`/store/carts/${cart.id}/line-items`, {
+      variant_id: product.variants[0].id,
+      quantity: 1,
+    })
+
+    expect(res.data.cart.items[0].unit_price).toEqual(100)
+    expect(res.data.cart.items[0].quantity).toEqual(1)
+    expect(res.data.cart.items[0].subtotal).toEqual(100)
+    expect(res.data.cart.items[0].tax_total).toEqual(10)
+    expect(res.data.cart.items[0].total).toEqual(110)
+    expect(res.data.cart.items[0].original_total).toEqual(110)
+    expect(res.data.cart.items[0].original_tax_total).toEqual(10)
+    expect(res.data.cart.items[0].discount_total).toEqual(0)
+    expect(res.data.cart.items[0].gift_card_total).toEqual(0)
+  })
+
+  it("sets correct line item totals for a cart with item of price 100; tax rate 10; discount 10", async () => {
+    const api = useApi()
+
+    const region = await simpleRegionFactory(dbConnection)
+    const product = await simpleProductFactory(dbConnection)
+    const discount = await simpleDiscountFactory(dbConnection, {
+      regions: [region.id],
+      type: "percentage",
+      value: 10,
+    })
+
+    await simpleProductTaxRateFactory(dbConnection, {
+      product_id: product.id,
+      rate: {
+        region_id: region.id,
+        rate: 10,
+      },
+    })
+
+    const { cart } = await api
+      .post("/store/carts", {
+        region_id: region.id,
+      })
+      .then((res) => res.data)
+
+    await api.post(`/store/carts/${cart.id}/line-items`, {
+      variant_id: product.variants[0].id,
+      quantity: 1,
+    })
+
+    const res = await api.post(`/store/carts/${cart.id}`, {
+      discounts: [
+        {
+          code: discount.code,
+        },
+      ],
+    })
+
+    expect(res.data.cart.items[0].unit_price).toEqual(100)
+    expect(res.data.cart.items[0].quantity).toEqual(1)
+    expect(res.data.cart.items[0].subtotal).toEqual(100)
+    expect(res.data.cart.items[0].tax_total).toEqual(9)
+    expect(res.data.cart.items[0].total).toEqual(99)
+    expect(res.data.cart.items[0].original_total).toEqual(110)
+    expect(res.data.cart.items[0].original_tax_total).toEqual(10)
+    expect(res.data.cart.items[0].discount_total).toEqual(10)
+    expect(res.data.cart.items[0].gift_card_total).toEqual(0)
+  })
+
+  it("doesn't include taxes in !automatic_taxes regions", async () => {
+    const api = useApi()
+
+    const region = await simpleRegionFactory(dbConnection, {
+      automatic_taxes: false,
+    })
+    const product = await simpleProductFactory(dbConnection)
+    const discount = await simpleDiscountFactory(dbConnection, {
+      regions: [region.id],
+      type: "percentage",
+      value: 10,
+    })
+
+    await simpleProductTaxRateFactory(dbConnection, {
+      product_id: product.id,
+      rate: {
+        region_id: region.id,
+        rate: 10,
+      },
+    })
+
+    const { cart } = await api
+      .post("/store/carts", {
+        region_id: region.id,
+      })
+      .then((res) => res.data)
+
+    await api.post(`/store/carts/${cart.id}/line-items`, {
+      variant_id: product.variants[0].id,
+      quantity: 1,
+    })
+
+    const res = await api.post(`/store/carts/${cart.id}`, {
+      discounts: [
+        {
+          code: discount.code,
+        },
+      ],
+    })
+
+    expect(res.data.cart.items[0].unit_price).toEqual(100)
+    expect(res.data.cart.items[0].quantity).toEqual(1)
+    expect(res.data.cart.items[0].subtotal).toEqual(100)
+    expect(res.data.cart.items[0].tax_total).toEqual(0)
+    expect(res.data.cart.items[0].total).toEqual(90)
+    expect(res.data.cart.items[0].original_total).toEqual(100)
+    expect(res.data.cart.items[0].original_tax_total).toEqual(0)
+    expect(res.data.cart.items[0].discount_total).toEqual(10)
+    expect(res.data.cart.items[0].gift_card_total).toEqual(0)
+  })
+
+  it("includes taxes in !automatic_taxes regions when forced", async () => {
+    const api = useApi()
+
+    const region = await simpleRegionFactory(dbConnection, {
+      automatic_taxes: false,
+    })
+    const product = await simpleProductFactory(dbConnection)
+    const discount = await simpleDiscountFactory(dbConnection, {
+      regions: [region.id],
+      type: "percentage",
+      value: 10,
+    })
+
+    await simpleProductTaxRateFactory(dbConnection, {
+      product_id: product.id,
+      rate: {
+        region_id: region.id,
+        rate: 10,
+      },
+    })
+
+    const { cart } = await api
+      .post("/store/carts", {
+        region_id: region.id,
+      })
+      .then((res) => res.data)
+
+    await api.post(`/store/carts/${cart.id}/line-items`, {
+      variant_id: product.variants[0].id,
+      quantity: 1,
+    })
+
+    await api.post(`/store/carts/${cart.id}`, {
+      discounts: [
+        {
+          code: discount.code,
+        },
+      ],
+    })
+
+    const res = await api.post(`/store/carts/${cart.id}/taxes`)
+
+    expect(res.data.cart.items[0].unit_price).toEqual(100)
+    expect(res.data.cart.items[0].quantity).toEqual(1)
+    expect(res.data.cart.items[0].subtotal).toEqual(100)
+    expect(res.data.cart.items[0].tax_total).toEqual(9)
+    expect(res.data.cart.items[0].total).toEqual(99)
+    expect(res.data.cart.items[0].original_total).toEqual(110)
+    expect(res.data.cart.items[0].original_tax_total).toEqual(10)
+    expect(res.data.cart.items[0].discount_total).toEqual(10)
+    expect(res.data.cart.items[0].gift_card_total).toEqual(0)
+  })
+})

integration-tests/api/factories/index.ts

@@ -1,5 +1,6 @@
 export * from "./simple-payment-factory"
 export * from "./simple-batch-job-factory"
+export * from "./simple-discount-factory"
 export * from "./simple-order-factory"
 export * from "./simple-cart-factory"
 export * from "./simple-region-factory"
@@ -14,4 +15,3 @@ export * from "./simple-shipping-method-factory"
 export * from "./simple-product-type-tax-rate-factory"
 export * from "./simple-price-list-factory"
 export * from "./simple-batch-job-factory"
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