Use invoiced line tax field names

tests/test_invoice_helpers.py

@@ -53,7 +53,7 @@ class AccountInvoiceDoUnitTestCase(unittest.TestCase):
             InvoiceLine._compute_tax_kind_amount(line, 'itbis'),
             Decimal('18.00'))
         self.assertEqual(
-            InvoiceLine.on_change_with_itbis_line(line),
+            InvoiceLine.on_change_with_itbis_invoiced_line(line),
             Decimal('18.00'))
         self.assertEqual(
             InvoiceLine._compute_line_total_amount(line),

tests/test_module.py

@@ -98,7 +98,7 @@ class AccountInvoiceDoTestCase(ModuleTestCase):
         self.assertEqual(invoice.total_amount, Decimal('300.00'))
         line, = invoice.lines
         self.assertEqual(line.product_type, '')
-        self.assertEqual(line.itbis_line, Decimal('0.00'))
+        self.assertEqual(line.itbis_invoiced_line, Decimal('0.00'))
         self.assertEqual(line.line_total, Decimal('300.00'))