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import _testinternalcapi
import unittest
import types
class TestRareEventCounters(unittest.TestCase):
def test_set_class(self):
class A:
pass
class B:
pass
a = A()
orig_counter = _testinternalcapi.get_rare_event_counters()["set_class"]
a.__class__ = B
self.assertEqual(
orig_counter + 1,
_testinternalcapi.get_rare_event_counters()["set_class"]
)
def test_set_bases(self):
class A:
pass
class B:
pass
class C(B):
pass
orig_counter = _testinternalcapi.get_rare_event_counters()["set_bases"]
C.__bases__ = (A,)
self.assertEqual(
orig_counter + 1,
_testinternalcapi.get_rare_event_counters()["set_bases"]
)
def test_set_eval_frame_func(self):
orig_counter = _testinternalcapi.get_rare_event_counters()["set_eval_frame_func"]
_testinternalcapi.set_eval_frame_record([])
self.assertEqual(
orig_counter + 1,
_testinternalcapi.get_rare_event_counters()["set_eval_frame_func"]
)
_testinternalcapi.set_eval_frame_default()
def test_builtin_dict(self):
orig_counter = _testinternalcapi.get_rare_event_counters()["builtin_dict"]
if isinstance(__builtins__, types.ModuleType):
builtins = __builtins__.__dict__
else:
builtins = __builtins__
builtins["FOO"] = 42
self.assertEqual(
orig_counter + 1,
_testinternalcapi.get_rare_event_counters()["builtin_dict"]
)
del builtins["FOO"]
def test_func_modification(self):
def func(x=0):
pass
for attribute in (
"__code__",
"__defaults__",
"__kwdefaults__"
):
orig_counter = _testinternalcapi.get_rare_event_counters()["func_modification"]
setattr(func, attribute, getattr(func, attribute))
self.assertEqual(
orig_counter + 1,
_testinternalcapi.get_rare_event_counters()["func_modification"]
)
if __name__ == "__main__":
unittest.main()
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