Improve and add tests for multi_company_disable

multi_company_disable/models/res_company.py

@@ -6,9 +6,13 @@ class ResCompany(models.Model):
     _inherit = "res.company"
 
     @api.model_create_multi
-    def create(self, vals_list):  # pylint: disable=method-required-super
-        raise AccessError(_("Multi-company is disabled"))
+    def create(self, vals_list):
+        res = super().create(vals_list)
+        if not self.env.is_superuser():
+            raise AccessError(_("Multi-company is disabled"))
+        return res
 
     @api.ondelete(at_uninstall=False)
     def _unlink_prevent(self):
-        raise AccessError(_("Multi-company is disabled"))
+        if not self.env.is_superuser():
+            raise AccessError(_("Multi-company is disabled"))

multi_company_disable/tests/__init__.py

@@ -0,0 +1 @@
+from . import test_prevent_crud

multi_company_disable/tests/test_prevent_crud.py

@@ -0,0 +1,10 @@
+from odoo.exceptions import AccessError
+from odoo.tests.common import TransactionCase
+
+
+class TestPreventCrud(TransactionCase):
+    def test_creation(self):
+        with self.assertRaises(AccessError):
+            with self.with_user("admin"):
+                self.env["res.company"].create({"name": "My company"})
+        self.env["res.company"].create({"name": "My company 2"})