pytest: Add support for pytest-8.2 on Python3.11 (color, verbose)

pytest.ini

@@ -1,6 +1,9 @@
 [pytest]
-# By default, show reports for failed tests:
-addopts=-rF
+# By default, show reports for failed tests, and show the summary: -rF
+# By default, also be verbose (needed for self-tests with pytest-8) -vv
+# By default, also show the local variables in the traceback: --showlocals
+addopts=-rF -vv --showlocals
+
 # imp is only used in a unit test, will be updated to python3 later:
 filterwarnings=ignore:the imp module is deprecated
 # Enable live logging of the python log output, starting with log level INFO by default:

tests/unit/test_filter_xapi_clusterd_db.py

@@ -168,8 +168,13 @@ def test_assertion_on_unexpected_token(isolated_bugtool):
     # -> Act and assert: Check that the assertion function fails on the unexpected output
     #    The assertion function should assert on the differing authkey value and the
     #    diff with the wrongly expected string should be in the assertion error message
+    #
+    # pytest-8 adds very fine-grained coloring of the assertion error message
+    # which makes it harder to match the diff string in the assertion error message.
+    # Apparently, we cannot disable the coloring for a single assertion, so we can
+    # only check for the the unexpected token in the assertion:
 
-    diff = "{'token': 'REMOVED'} != {'token': 'unexpected token value'}"
+    diff = "'token': 'unexpected token value'"
     check_assert_on_unexpected_differences_in_output(isolated_bugtool, expected, diff)