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import pytest
import cPickle
def test_stack_underflow():
with pytest.raises(cPickle.UnpicklingError):
cPickle.loads("a string")
def test_bad_key():
with pytest.raises(cPickle.UnpicklingError) as excinfo:
cPickle.loads("v")
assert str(excinfo.value) == "invalid load key, 'v'."
def test_find_global():
import time, cStringIO
entry = time.strptime('Fri Mar 27 22:20:42 2017')
f = cStringIO.StringIO()
cPickle.Pickler(f).dump(entry)
f = cStringIO.StringIO(f.getvalue())
e = cPickle.Unpickler(f).load()
assert e == entry
f = cStringIO.StringIO(f.getvalue())
up = cPickle.Unpickler(f)
up.find_global = None
with pytest.raises(cPickle.UnpicklingError) as e:
up.load()
assert str(e.value) == "Global and instance pickles are not supported."
f = cStringIO.StringIO(f.getvalue())
up = cPickle.Unpickler(f)
up.find_global = lambda module, name: lambda a, b: (name, a, b)
e = up.load()
assert e == ('struct_time', (2017, 3, 27, 22, 20, 42, 4, 86, -1), {})
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