[FIX] account: fix test for 2020

When an invoice is duplicated, the `invoice_date` is not carried over.
If the field is not set, it will be set at posting at the current date.

closes odoo/odoo#42622

X-original-commit: 135d3db7b9b222be198e91235657bbef77d2f69b
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/account/tests/test_account_move_in_invoice.py

@@ -823,7 +823,10 @@ class TestAccountMoveInInvoiceOnchanges(AccountTestInvoicingCommon):
 
         self.assertRecordValues(self.invoice, [{'name': 'BILL/2019/0042'}])
 
-        invoice_copy = self.invoice.copy()
+        values = {
+            'invoice_date': self.invoice.invoice_date,
+        }
+        invoice_copy = self.invoice.copy(default=values)
         invoice_copy.post()
 
         self.assertRecordValues(invoice_copy, [{'name': 'BILL/2019/0043'}])

addons/account/tests/test_account_move_in_refund.py

@@ -823,7 +823,10 @@ class TestAccountMoveInRefundOnchanges(AccountTestInvoicingCommon):
 
         self.assertRecordValues(self.invoice, [{'name': 'RBILL/2019/0042'}])
 
-        invoice_copy = self.invoice.copy()
+        values = {
+            'invoice_date': self.invoice.invoice_date,
+        }
+        invoice_copy = self.invoice.copy(default=values)
         invoice_copy.post()
 
         self.assertRecordValues(invoice_copy, [{'name': 'RBILL/2019/0043'}])

addons/account/tests/test_account_move_out_invoice.py

@@ -967,7 +967,10 @@ class TestAccountMoveOutInvoiceOnchanges(AccountTestInvoicingCommon):
 
         self.assertRecordValues(self.invoice, [{'name': 'INV/2019/0042'}])
 
-        invoice_copy = self.invoice.copy()
+        values = {
+            'invoice_date': self.invoice.invoice_date,
+        }
+        invoice_copy = self.invoice.copy(default=values)
         invoice_copy.post()
 
         self.assertRecordValues(invoice_copy, [{'name': 'INV/2019/0043'}])

addons/account/tests/test_account_move_out_refund.py

@@ -823,7 +823,10 @@ class TestAccountMoveOutRefundOnchanges(AccountTestInvoicingCommon):
 
         self.assertRecordValues(self.invoice, [{'name': 'RINV/2019/0042'}])
 
-        invoice_copy = self.invoice.copy()
+        values = {
+            'invoice_date': self.invoice.invoice_date,
+        }
+        invoice_copy = self.invoice.copy(default=values)
         invoice_copy.post()
 
         self.assertRecordValues(invoice_copy, [{'name': 'RINV/2019/0043'}])