From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Mon, 26 Feb 2024 13:00:14 +0000 (+0100)
Subject: [3.12] gh-115931: Fix `SyntaxWarning`s in `test_unparse` (GH-115935) (#115948)
X-Git-Tag: v3.12.3~200
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8668b3cc2d926250fb29738788df7da6a45d2278;p=thirdparty%2FPython%2Fcpython.git

[3.12] gh-115931: Fix `SyntaxWarning`s in `test_unparse` (GH-115935) (#115948)

gh-115931: Fix `SyntaxWarning`s in `test_unparse` (GH-115935)
(cherry picked from commit b7383b8b71d49c761480ae9a8b2111644310e61d)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
---

diff --git a/Lib/test/test_unparse.py b/Lib/test/test_unparse.py
index 77ce18cbf4cb..106704ba8c9c 100644
--- a/Lib/test/test_unparse.py
+++ b/Lib/test/test_unparse.py
@@ -650,9 +650,18 @@ class CosmeticTestCase(ASTTestCase):
         self.check_ast_roundtrip("""f'''""\"''\\'{""\"\\n\\"'''""\" '''\\n'''}''' """)
 
     def test_backslash_in_format_spec(self):
-        self.check_ast_roundtrip("""f"{x:\\ }" """)
+        import re
+        msg = re.escape("invalid escape sequence '\\ '")
+        with self.assertWarnsRegex(SyntaxWarning, msg):
+            self.check_ast_roundtrip("""f"{x:\\ }" """)
+        self.check_ast_roundtrip("""f"{x:\\n}" """)
+
         self.check_ast_roundtrip("""f"{x:\\\\ }" """)
-        self.check_ast_roundtrip("""f"{x:\\\\\\ }" """)
+
+        with self.assertWarnsRegex(SyntaxWarning, msg):
+            self.check_ast_roundtrip("""f"{x:\\\\\\ }" """)
+        self.check_ast_roundtrip("""f"{x:\\\\\\n}" """)
+
         self.check_ast_roundtrip("""f"{x:\\\\\\\\ }" """)
 
     def test_quote_in_format_spec(self):