[FIX] l10n_jp_summary_invoice: fix issue when the company currency and billing currency are different

Author: AungKoKoLin1997

l10n_jp_summary_invoice/models/account_billing.py

@@ -154,7 +154,7 @@ def _get_tax_amount_groups_from_invoices(self):
                 ("display_type", "=", "rounding"),
                 ("tax_repartition_line_id", "!=", False),
             ],
-            fields=["tax_group_id", "balance"],
+            fields=["tax_group_id", "amount_currency:sum"],
             groupby=["tax_group_id"],
         )
         return tax_amount_groups
@@ -190,7 +190,7 @@ def validate_billing(self):
             tax_group_diff_dict = {}
             for tax_amount_group in tax_amount_groups_invoices:
                 tax_group_id = tax_amount_group["tax_group_id"][0]
-                tax_amount_invoices = tax_amount_group["balance"]
+                tax_amount_invoices = tax_amount_group["amount_currency"]
                 tax_amount_bill = tax_group_amount_dict.get(tax_group_id, 0)
                 tax_diff = tax_amount_invoices - tax_amount_bill
                 if tax_diff:

l10n_jp_summary_invoice/tests/test_l10n_jp_summary_invoice.py

@@ -58,14 +58,17 @@ def setUpClass(cls):
             }
         )
 
-    def _create_invoice(self, amount, tax, move_type="out_invoice", bank=None):
+    def _create_invoice(
+        self, amount, tax, move_type="out_invoice", bank=None, currency_id=None
+    ):
         invoice = (
             self.env["account.move"]
             .with_company(self.company)
             .create(
                 {
                     "move_type": move_type,
                     "partner_id": self.partner.id,
+                    "currency_id": currency_id or self.company.currency_id.id,
                     "partner_bank_id": bank and bank.id,
                     "invoice_line_ids": [
                         Command.create(
@@ -194,3 +197,19 @@ def test_create_tax_adjustment_entry(self):
         # The total tax amount should be 20 (204 * 0.1)
         self.assertEqual(abs(billing_tax_amount), 20)
         self.assertFalse(billing.tax_adjustment_entry_id)
+
+    def test_check_tax_adjustment_entry_with_different_currency(self):
+        currency_usd = self.env.ref("base.USD")
+        currency_usd.active = True
+        out_inv_1 = self._create_invoice(100, self.tax_10, currency_id=currency_usd.id)
+        out_inv_2 = self._create_invoice(100, self.tax_10, currency_id=currency_usd.id)
+        out_inv_3 = self._create_invoice(100, self.tax_10, currency_id=currency_usd.id)
+        invoices = out_inv_1 + out_inv_2 + out_inv_3
+        action = invoices.action_create_billing()
+        billing = self.env["account.billing"].browse(action["res_id"])
+        self.assertEqual(billing.state, "draft")
+        self.assertEqual(billing.currency_id, currency_usd)
+        billing.with_company(self.company).validate_billing()
+        billing_tax_amount = self._get_billing_tax_amount(billing)
+        self.assertEqual(abs(billing_tax_amount), 30)
+        self.assertFalse(billing.tax_adjustment_entry_id)