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gh-94808: Cover LOAD_GLOBAL for custom dict subtypes #96767

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Nov 4, 2022
Merged

gh-94808: Cover LOAD_GLOBAL for custom dict subtypes #96767

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gh-94808: Cover `LOAD_GLOBAL` for custom dict subtypes
sobolevn Sep 12, 2022
51412c2
Add regex to the last test
sobolevn Sep 12, 2022
911bca1
Address review
sobolevn Nov 4, 2022
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26 changes: 26 additions & 0 deletions Lib/test/test_builtin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -768,6 +768,32 @@ def __setitem__(self, key, value):
self.assertRaises(frozendict_error,
exec, code, namespace)

# custom `globals` or `builtins` can raise errors on item access
class setonlyerror(Exception):
pass

class setonlydict(dict):
def __getitem__(self, key):
raise setonlyerror

class customdict(dict): # this one should not do anything fancy
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This should be defined just before the test that uses it (below). Ideally this function would be broken up - it's testing a lot of things.

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Done! Thanks!

pass

# globals' `__getitem__` raises
code = compile("print(globalname)", "test", "exec")
self.assertRaises(setonlyerror,
exec, code, setonlydict({'globalname': 1}))

# builtins' `__getitem__` raises
code = compile("print(superglobal)", "test", "exec")
self.assertRaises(setonlyerror, exec, code,
{'__builtins__': setonlydict({'superglobal': 1})})

# custom builtins dict subclass is missing key
code = compile("print(superglobal)", "test", "exec")
self.assertRaises(NameError, exec, code,
{'__builtins__': customdict()})

def test_exec_redirected(self):
savestdout = sys.stdout
sys.stdout = None # Whatever that cannot flush()
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