From 57a20b0960f5c087a476b34c72f608580746cab5 Mon Sep 17 00:00:00 2001
From: "Erlend E. Aasland" <erlend@python.org>
Date: Wed, 16 Aug 2023 12:39:56 +0200
Subject: [PATCH] gh-106368: Argument Clinic: Test that keyword params are
 disallowed in groups (#107985)

---
 Lib/test/test_clinic.py | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/Lib/test/test_clinic.py b/Lib/test/test_clinic.py
index 76729c8c3e4f79..32aac407a028c9 100644
--- a/Lib/test/test_clinic.py
+++ b/Lib/test/test_clinic.py
@@ -1524,6 +1524,27 @@ def test_disallowed_grouping__no_matching_bracket(self):
         err = "Function 'empty_group' has a ']' without a matching '['"
         self.expect_failure(block, err)
 
+    def test_disallowed_grouping__must_be_position_only(self):
+        dataset = ("""
+            with_kwds
+                [
+                *
+                a: object
+                ]
+        """, """
+            with_kwds
+                [
+                a: object
+                ]
+        """)
+        err = (
+            "You cannot use optional groups ('[' and ']') unless all "
+            "parameters are positional-only ('/')"
+        )
+        for block in dataset:
+            with self.subTest(block=block):
+                self.expect_failure(block, err)
+
     def test_no_parameters(self):
         function = self.parse_function("""
             module foo