[FIX] hr_expense: create expense from email with taxes

Have an expense product with a supplier tax on it

Write an email to be caught by the thread model to create an expense for that product

Before this commit, the tax was not set up on the expense

After this commit, it is

OPW 1908596

closes odoo/odoo#29061

addons/hr_expense/models/hr_expense.py

@@ -395,6 +395,7 @@ class HrExpense(models.Model):
             'employee_id': employee.id,
             'product_id': product.id,
             'product_uom_id': product.uom_id.id,
+            'tax_ids': [(4, tax.id, False) for tax in product.supplier_taxes_id],
             'quantity': 1,
             'unit_amount': price,
             'company_id': employee.company_id.id,

addons/hr_expense/tests/test_expenses.py

@@ -87,3 +87,23 @@ class TestCheckJournalEntry(TransactionCase):
                     self.assertAlmostEquals(line.debit, 636.36)
                 else:
                     self.assertAlmostEquals(line.debit, 63.64)
+
+    def test_expense_from_email(self):
+        user_demo = self.env.ref('base.user_demo')
+        self.tax.price_include = False
+
+        message_parsed = {
+            'message_id': 'the-world-is-a-ghetto',
+            'subject': '[AT] 9876',
+            'email_from': 'demo@yourcompany.example.com',
+            'to': 'catchall@yourcompany.com',
+            'body': "Don't you know, that for me, and for you",
+            'attachments': [],
+        }
+
+        expense = self.env['hr.expense'].message_new(message_parsed)
+
+        self.assertEquals(expense.product_id, self.product)
+        self.assertEquals(expense.tax_ids.ids, [self.tax.id])
+        self.assertEquals(expense.total_amount, 10863.60)
+        self.assertTrue(expense.employee_id in user_demo.employee_ids)