From b789143b96e514f559a2f30ab4d349495d7575a4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Furga=C5=82a?=
 <83299832+00200200@users.noreply.github.com>
Date: Mon, 28 Sep 2026 21:01:34 +0200
Subject: [PATCH] test: allow variable frame width in recursion error test
 (#386)

In test_render_debug_better_error_message_recursion_error, line numbers and repeated frame counts are right-aligned to max_frame_length = len(str(remaining_frames_length)). On platforms like PyPy or when recursion depth exceeds 999 frames, max_frame_length is 4 or more digits, leading to additional indentation before the code lines and repeated frame marker '...'.

Use \s+ and \s*\.\.\. in the regex pattern to accommodate variable frame count widths while continuing to strictly validate the formatted stack trace.

Fixes #386.
---
 news/386.bugfix.md               |  1 +
 tests/ui/test_exception_trace.py | 24 ++++++++++++------------
 2 files changed, 13 insertions(+), 12 deletions(-)
 create mode 100644 news/386.bugfix.md

diff --git a/news/386.bugfix.md b/news/386.bugfix.md
new file mode 100644
index 00000000..f31d6bee
--- /dev/null
+++ b/news/386.bugfix.md
@@ -0,0 +1 @@
+Fix `test_render_debug_better_error_message_recursion_error` failure under PyPy and deep recursion limits.
diff --git a/tests/ui/test_exception_trace.py b/tests/ui/test_exception_trace.py
index df57a2e7..d22e1382 100644
--- a/tests/ui/test_exception_trace.py
+++ b/tests/ui/test_exception_trace.py
@@ -92,18 +92,18 @@ def test_render_debug_better_error_message_recursion_error() -> None:
   Stack trace:
 
   \d+  {re.escape(str(trace._get_relative_file_path(__file__)))}:{lineno} in test_render_debug_better_error_message_recursion_error
-         {lineno - 2}\│ 
-         {lineno - 1}\│     try:
-      →  {lineno + 0}\│         recursion.recursion_error\(\)
-         {lineno + 1}\│     except RecursionError as e:
-         {lineno + 2}\│         trace = ExceptionTrace\(e\)
-
-  ...  Previous frame repeated \d+ times
-
-  \s*\d+  {re.escape(str(trace._get_relative_file_path(recursion.__file__)))}:2 in recursion_error
-          1\│ def recursion_error\(\) -> None:
-      →   2\│     recursion_error\(\)
-          3\│ 
+\s+{lineno - 2}\│ 
+\s+{lineno - 1}\│     try:
+\s*→\s+{lineno + 0}\│         recursion.recursion_error\(\)
+\s+{lineno + 1}\│     except RecursionError as e:
+\s+{lineno + 2}\│         trace = ExceptionTrace\(e\)
+
+\s*\.\.\.  Previous frame repeated \d+ times
+
+\s*\d+  {re.escape(str(trace._get_relative_file_path(recursion.__file__)))}:2 in recursion_error
+\s+1\│ def recursion_error\(\) -> None:
+\s*→\s+2\│     recursion_error\(\)
+\s+3\│ 
 
   RecursionError