test: validation on mixed condition with recursion

erpnext/accounts/doctype/promotional_scheme/test_promotional_scheme.py

@@ -129,6 +129,25 @@ class TestPromotionalScheme(unittest.TestCase):
 			[pr.min_qty, pr.free_item, pr.free_qty, pr.recurse_for], [12, "_Test Item 2", 1, 12]
 		)
 
+	def test_validation_on_recurse_with_mixed_condition(self):
+		ps = make_promotional_scheme()
+		ps.set("price_discount_slabs", [])
+		ps.set(
+			"product_discount_slabs",
+			[
+				{
+					"rule_description": "12+1",
+					"min_qty": 12,
+					"free_item": "_Test Item 2",
+					"free_qty": 1,
+					"is_recursive": 1,
+					"recurse_for": 12,
+				}
+			],
+		)
+		ps.mixed_conditions = True
+		self.assertRaises(frappe.ValidationError, ps.save)
+
 
 def make_promotional_scheme(**args):
 	args = frappe._dict(args)