From 3e82b1093386dc0abe2b708b66f3404b1f8e74b2 Mon Sep 17 00:00:00 2001
From: "d.kovalenko" <dmitry.lipetsk@gmail.com>
Date: Wed, 14 Oct 2026 12:41:12 +0300
Subject: [PATCH] fix: (TestServices) usage of traceback.format_exception is
 corrected

We have a problem on py3.9-.
---
 tests/conftest_helpers.py                     | 22 +++++++---
 tests/own/TestServices/__init__.py            |  0
 ...1__Helper__ExceptionToHumanText__Single.py | 22 ++++++++++
 ...02__Helper__ExceptionToHumanText__Chain.py | 43 +++++++++++++++++++
 tests/own/__init__.py                         |  0
 5 files changed, 81 insertions(+), 6 deletions(-)
 create mode 100644 tests/own/TestServices/__init__.py
 create mode 100644 tests/own/TestServices/test_set001__Helper__ExceptionToHumanText__Single.py
 create mode 100644 tests/own/TestServices/test_set002__Helper__ExceptionToHumanText__Chain.py
 create mode 100644 tests/own/__init__.py

diff --git a/tests/conftest_helpers.py b/tests/conftest_helpers.py
index 099823a..ec6ef68 100644
--- a/tests/conftest_helpers.py
+++ b/tests/conftest_helpers.py
@@ -709,9 +709,8 @@ def Helper__ExceptionToHumanText__Single(exc: BaseException) -> str:
             err_msg = "Exception ({}).".format(type(exc).__name__)
             assert type(err_msg) is str
 
-            exc_info_lines = traceback.format_exception(exc)
-            assert type(exc_info_lines) is list
-            err_msg2 = "".join(exc_info_lines).strip()
+            err_msg2 = __class__.Helper__GetTraceBack(exc)
+            assert type(err_msg2) is str
 
             if err_msg2 != "":
                 err_msg += " " + err_msg2
@@ -793,10 +792,21 @@ def Helper__GetExcMsg(exc: BaseException) -> str:
         assert isinstance(exc, BaseException)
 
         if isinstance(exc, AssertionError):
-            exc_info_lines = traceback.format_exception(exc)
-            assert type(exc_info_lines) is list
-            return "".join(exc_info_lines).strip()
+            return __class__.Helper__GetTraceBack(exc)
 
         return str(exc)
 
+    # --------------------------------------------------------------------
+    @staticmethod
+    def Helper__GetTraceBack(exc: BaseException) -> str:
+        assert isinstance(exc, BaseException)
+
+        exc_info_lines = traceback.format_exception(
+            type(exc),
+            exc,
+            exc.__traceback__,
+        )
+        assert type(exc_info_lines) is list
+        return "".join(exc_info_lines).strip()
+
 # /////////////////////////////////////////////////////////////////////////////
diff --git a/tests/own/TestServices/__init__.py b/tests/own/TestServices/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/own/TestServices/test_set001__Helper__ExceptionToHumanText__Single.py b/tests/own/TestServices/test_set001__Helper__ExceptionToHumanText__Single.py
new file mode 100644
index 0000000..323f570
--- /dev/null
+++ b/tests/own/TestServices/test_set001__Helper__ExceptionToHumanText__Single.py
@@ -0,0 +1,22 @@
+from ...conftest_helpers import TestServices
+
+import pytest
+import logging
+
+
+class TestSet001__Helper__ExceptionToHumanText__Single:
+    def test_001(self):
+        with pytest.raises(expected_exception=AssertionError) as x:
+            v = 1
+            assert v == 2
+
+        assert isinstance(x.value, AssertionError)
+
+        msg = TestServices.Helper__ExceptionToHumanText__Single(x.value)
+
+        logging.info("msg: {}".format(msg))
+
+        assert "Exception (AssertionError)." in msg
+        assert "v == 2" in msg
+        assert "AssertionError: assert 1 == 2" in msg
+        return
diff --git a/tests/own/TestServices/test_set002__Helper__ExceptionToHumanText__Chain.py b/tests/own/TestServices/test_set002__Helper__ExceptionToHumanText__Chain.py
new file mode 100644
index 0000000..704ecf2
--- /dev/null
+++ b/tests/own/TestServices/test_set002__Helper__ExceptionToHumanText__Chain.py
@@ -0,0 +1,43 @@
+from ...conftest_helpers import TestServices
+
+import pytest
+import logging
+
+
+class TestSet002__Helper__ExceptionToHumanText__Chain:
+    def test_001(self):
+        with pytest.raises(expected_exception=AssertionError) as x:
+            v = 1
+            assert v == 2
+
+        assert isinstance(x.value, AssertionError)
+
+        msg = TestServices.Helper__ExceptionToHumanText__Chain(x.value)
+
+        logging.info("msg: {}".format(msg))
+
+        assert "---- 1. Exception (AssertionError):" in msg
+        assert "v == 2" in msg
+        assert "AssertionError: assert 1 == 2" in msg
+        return
+
+    def test_002(self):
+        with pytest.raises(expected_exception=AssertionError) as x:
+            v = 1
+            try:
+                raise RuntimeError("aaa")
+            except Exception:
+                assert v == 2
+
+        assert isinstance(x.value, AssertionError)
+
+        msg = TestServices.Helper__ExceptionToHumanText__Chain(x.value)
+
+        logging.info("msg: {}".format(msg))
+
+        assert "---- 1. Exception (RuntimeError):" in msg
+        assert "aaa" in msg
+        assert "---- 2. Exception (AssertionError):" in msg
+        assert "v == 2" in msg
+        assert "AssertionError: assert 1 == 2" in msg
+        return
diff --git a/tests/own/__init__.py b/tests/own/__init__.py
new file mode 100644
index 0000000..e69de29