[18.0][TEST] pos_operating_unit: OU coverage test

Author: ccarrenoc

pos_operating_unit/tests/test_pos_operating_unit_basic.py

@@ -43,3 +43,38 @@ def test_operating_unit_assignment_via_write(self):
         self.assertFalse(cfg.operating_unit_ids)
         cfg.write({"operating_unit_ids": [Command.set([self.ou.id])]})
         self.assertIn(self.ou, cfg.operating_unit_ids)
+
+    def test_operating_unit_unset_via_write(self):
+        """Ensure operating_unit_ids can be unset via write."""
+        cfg = self.env["pos.config"].create(
+            {
+                "name": "POS Unset Test",
+                "company_id": self.company.id,
+                "operating_unit_ids": [Command.set([self.ou.id])],
+            }
+        )
+        self.assertIn(self.ou, cfg.operating_unit_ids)
+        cfg.write({"operating_unit_ids": [Command.set([])]})
+        self.assertFalse(cfg.operating_unit_ids)
+
+    def test_assign_multiple_operating_units(self):
+        """Assign multiple operating units to a config and verify both are present."""
+        partner2 = self.env["res.partner"].create({"name": "OU2 Partner"})
+        ou2 = self.env["operating.unit"].create(
+            {
+                "name": "OU 2",
+                "code": "OU2",
+                "company_id": self.company.id,
+                "partner_id": partner2.id,
+            }
+        )
+        cfg = self.env["pos.config"].create(
+            {
+                "name": "POS Multi OU",
+                "company_id": self.company.id,
+                "operating_unit_ids": [Command.set([self.ou.id, ou2.id])],
+            }
+        )
+        self.assertIn(self.ou, cfg.operating_unit_ids)
+        self.assertIn(ou2, cfg.operating_unit_ids)
+        self.assertEqual(len(cfg.operating_unit_ids), 2)