Issue #10990: Prevent tests from clobbering a set trace function.
Many tests simply didn't care if they unset a pre-existing trace function. This
made test coverage impossible. This patch fixes various tests to put back any
pre-existing trace function. It also introduces test.support.no_tracing as a
decorator which will temporarily unset the trace function for tests which
simply fail otherwise.
Thanks to Kristian Vlaardingerbroek for helping to find the cause of various
trace function unsets.
diff --git a/Lib/test/pickletester.py b/Lib/test/pickletester.py
index 3ae7def..3534489 100644
--- a/Lib/test/pickletester.py
+++ b/Lib/test/pickletester.py
@@ -5,7 +5,7 @@
import copyreg
from http.cookies import SimpleCookie
-from test.support import TestFailed, TESTFN, run_with_locale
+from test.support import TestFailed, TESTFN, run_with_locale, no_tracing
from pickle import bytes_types
@@ -1002,6 +1002,7 @@
y = self.loads(s)
self.assertEqual(y._reduce_called, 1)
+ @no_tracing
def test_bad_getattr(self):
x = BadGetattr()
for proto in 0, 1: