From e5e8b1d3b02e6719169dca17e1bb8f814fbe59ab Mon Sep 17 00:00:00 2001
From: medimedi <liangmingzou@163.com>
Date: Sat, 8 Aug 2026 23:42:41 +0800
Subject: [PATCH] Add progress log regression test

---
 tests-unit/app_test/logger_test.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 tests-unit/app_test/logger_test.py

diff --git a/tests-unit/app_test/logger_test.py b/tests-unit/app_test/logger_test.py
new file mode 100644
index 000000000..0da33133c
--- /dev/null
+++ b/tests-unit/app_test/logger_test.py
@@ -0,0 +1,15 @@
+from collections import deque
+import io
+
+import app.logger
+
+
+def test_carriage_return_can_be_first_log_entry(monkeypatch):
+    monkeypatch.setattr(app.logger, "logs", deque())
+    stream = io.TextIOWrapper(io.BytesIO(), encoding="utf-8")
+    interceptor = app.logger.LogInterceptor(stream)
+
+    interceptor.write("\rprogress")
+
+    assert len(app.logger.logs) == 1
+    assert app.logger.logs[0]["m"] == "\rprogress"