[ADD] account_operating_unit: increase test coverage

account_operating_unit/tests/test_invoice_operating_unit.py

@@ -3,7 +3,7 @@
 # License LGPL-3.0 or later (https://www.gnu.org/licenses/lgpl.html).
 
 from odoo.exceptions import UserError
-from odoo.tests import tagged
+from odoo.tests import Form, tagged
 
 from . import test_account_operating_unit as test_ou
 
@@ -42,4 +42,32 @@ def test_create_invoice_validate(self):
         with self.assertRaises(UserError):
             self.invoice.line_ids[0].company_id = new_company.id
         # Check report invoice
-        self.env["account.invoice.report"].sudo().search_read([])
+        self.env["account.invoice.report"].sudo().read_group(
+            [], ["operating_unit_id"], ["operating_unit_id"]
+        )
+
+    def test_form(self):
+        """Test that the UI behaves as expected"""
+        journal_b2b = self.env["account.journal"].create(
+            {
+                "name": "B2B journal",
+                "code": "B2B",
+                "type": "sale",
+                "operating_unit_id": self.b2b.id,
+                "company_id": self.company.id,
+            }
+        )
+        with Form(
+            self.env["account.move"].with_context(default_move_type="out_invoice")
+        ) as invoice_form:
+            self.assertEqual(invoice_form.operating_unit_id, self.ou1)
+            ou1_journal = invoice_form.journal_id.copy(
+                dict(
+                    operating_unit_id=self.ou1.id,
+                    company_id=self.company.id,
+                )
+            )
+            invoice_form.operating_unit_id = self.b2b
+            self.assertEqual(invoice_form.journal_id, journal_b2b)
+            invoice_form.journal_id = ou1_journal
+            self.assertEqual(invoice_form.operating_unit_id, self.ou1)