feat: add sale domain rules

2026-09-08 17:54:27 -04:00
parent 8576c8f788
commit 34626332f2
2 changed files with 156 additions and 0 deletions
@@ -0,0 +1,57 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+
+import {
+  calculateNetSaleProceeds,
+  createSale,
+  createSaleItem,
+} from '../../src/modules/sales/domain/sale.js';
+
+test('creates a valid sale record and calculates net proceeds after fees', () => {
+  const sale = createSale({
+    sellerId: 'seller-id',
+    saleDate: '2026-09-08',
+    saleLocation: 'eBay',
+    soldPriceMinor: 4999,
+    currency: 'USD',
+    platformFeesMinor: 300,
+    paymentProcessingFeesMinor: 120,
+    shippingCostMinor: 50,
+    taxesMinor: 90,
+    otherFeesMinor: 40,
+    buyerName: 'Alex',
+    buyerContact: 'alex@example.com',
+  });
+
+  assert.equal(sale.soldPriceMinor, 4999);
+  assert.equal(sale.currency, 'USD');
+  assert.equal(calculateNetSaleProceeds({
+    soldPriceMinor: 4999,
+    platformFeesMinor: 300,
+    paymentProcessingFeesMinor: 120,
+    shippingCostMinor: 50,
+    taxesMinor: 90,
+    otherFeesMinor: 40,
+  }), 4399);
+});
+
+test('rejects invalid sales and negative fee values', () => {
+  assert.throws(
+    () => createSale({
+      sellerId: 'seller-id',
+      saleDate: '2026-09-08',
+      soldPriceMinor: 0,
+    }),
+    /must be a positive integer minor unit/,
+  );
+
+  assert.throws(
+    () => createSaleItem({
+      saleId: 'sale-id',
+      inventoryItemId: 'inventory-item-id',
+      soldPriceMinor: 2000,
+      costBasisMinor: -1,
+    }),
+    /must be a non-negative integer minor unit/,
+  );
+});