Issue 5665: add more pickling tests.
- Add tests for the module-level load() and dump() functions. - Add tests for cPickle's internal data structures, stressing workloads with many gets/puts. - Add tests for the Pickler and Unpickler classes, in particular the memo attribute. - test_xpickle is extended to test backwards compatibility with Python 2.4, 2.5 and 2.6 by round-tripping pickled objects through a worker process. This is guarded with a regrtest -u xpickle resource.
This commit is contained in:
Collin Winter
parent
5963185b23
commit
f8089c7789
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@ -1,11 +1,11 @@
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import unittest
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import pickle
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import cPickle
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import cStringIO
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import pickletools
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import copy_reg
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from test.test_support import TestFailed, have_unicode, TESTFN, \
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run_with_locale
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from test.test_support import TestFailed, have_unicode, TESTFN
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# Tests that try a number of pickle protocols should have a
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# for proto in protocols:
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@ -13,6 +13,42 @@ from test.test_support import TestFailed, have_unicode, TESTFN, \
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assert pickle.HIGHEST_PROTOCOL == cPickle.HIGHEST_PROTOCOL == 2
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protocols = range(pickle.HIGHEST_PROTOCOL + 1)
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# Copy of test.test_support.run_with_locale. This is needed to support Python
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# 2.4, which didn't include it. This is all to support test_xpickle, which
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# bounces pickled objects through older Python versions to test backwards
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# compatibility.
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def run_with_locale(catstr, *locales):
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def decorator(func):
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def inner(*args, **kwds):
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try:
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import locale
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category = getattr(locale, catstr)
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orig_locale = locale.setlocale(category)
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except AttributeError:
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# if the test author gives us an invalid category string
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raise
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except:
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# cannot retrieve original locale, so do nothing
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locale = orig_locale = None
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else:
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for loc in locales:
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try:
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locale.setlocale(category, loc)
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break
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except:
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pass
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# now run the function, resetting the locale on exceptions
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try:
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return func(*args, **kwds)
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finally:
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if locale and orig_locale:
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locale.setlocale(category, orig_locale)
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inner.func_name = func.func_name
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inner.__doc__ = func.__doc__
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return inner
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return decorator
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# Return True if opcode code appears in the pickle, else False.
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def opcode_in_pickle(code, pickle):
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@ -409,12 +445,11 @@ class AbstractPickleTests(unittest.TestCase):
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# is a mystery. cPickle also suppresses PUT for objects with a refcount
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# of 1.
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def dont_test_disassembly(self):
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from cStringIO import StringIO
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from pickletools import dis
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for proto, expected in (0, DATA0_DIS), (1, DATA1_DIS):
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s = self.dumps(self._testdata, proto)
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filelike = StringIO()
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filelike = cStringIO.StringIO()
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dis(s, out=filelike)
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got = filelike.getvalue()
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self.assertEqual(expected, got)
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@ -822,7 +857,7 @@ class AbstractPickleTests(unittest.TestCase):
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self.assertEqual(x.bar, y.bar)
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def test_reduce_overrides_default_reduce_ex(self):
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for proto in 0, 1, 2:
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for proto in protocols:
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x = REX_one()
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self.assertEqual(x._reduce_called, 0)
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s = self.dumps(x, proto)
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@ -831,7 +866,7 @@ class AbstractPickleTests(unittest.TestCase):
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self.assertEqual(y._reduce_called, 0)
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def test_reduce_ex_called(self):
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for proto in 0, 1, 2:
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for proto in protocols:
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x = REX_two()
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self.assertEqual(x._proto, None)
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s = self.dumps(x, proto)
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@ -840,7 +875,7 @@ class AbstractPickleTests(unittest.TestCase):
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self.assertEqual(y._proto, None)
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def test_reduce_ex_overrides_reduce(self):
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for proto in 0, 1, 2:
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for proto in protocols:
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x = REX_three()
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self.assertEqual(x._proto, None)
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s = self.dumps(x, proto)
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@ -849,7 +884,7 @@ class AbstractPickleTests(unittest.TestCase):
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self.assertEqual(y._proto, None)
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def test_reduce_ex_calls_base(self):
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for proto in 0, 1, 2:
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for proto in protocols:
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x = REX_four()
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self.assertEqual(x._proto, None)
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s = self.dumps(x, proto)
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@ -858,7 +893,7 @@ class AbstractPickleTests(unittest.TestCase):
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self.assertEqual(y._proto, proto)
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def test_reduce_calls_base(self):
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for proto in 0, 1, 2:
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for proto in protocols:
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x = REX_five()
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self.assertEqual(x._reduce_called, 0)
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s = self.dumps(x, proto)
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@ -879,7 +914,7 @@ class AbstractPickleTests(unittest.TestCase):
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return dict, (), None, None, []
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# Protocol 0 is less strict and also accept iterables.
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for proto in 0, 1, 2:
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for proto in protocols:
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try:
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self.dumps(C(), proto)
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except (AttributeError, pickle.PickleError, cPickle.PickleError):
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@ -889,6 +924,21 @@ class AbstractPickleTests(unittest.TestCase):
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except (AttributeError, pickle.PickleError, cPickle.PickleError):
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pass
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def test_many_puts_and_gets(self):
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# Test that internal data structures correctly deal with lots of
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# puts/gets.
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keys = ("aaa" + str(i) for i in xrange(100))
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large_dict = dict((k, [4, 5, 6]) for k in keys)
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obj = [dict(large_dict), dict(large_dict), dict(large_dict)]
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for proto in protocols:
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dumped = self.dumps(obj, proto)
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loaded = self.loads(dumped)
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self.assertEqual(loaded, obj,
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"Failed protocol %d: %r != %r"
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% (proto, obj, loaded))
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# Test classes for reduce_ex
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class REX_one(object):
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@ -990,13 +1040,20 @@ class AbstractPickleModuleTests(unittest.TestCase):
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finally:
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os.remove(TESTFN)
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def test_load_from_and_dump_to_file(self):
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stream = cStringIO.StringIO()
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data = [123, {}, 124]
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self.module.dump(data, stream)
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stream.seek(0)
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unpickled = self.module.load(stream)
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self.assertEqual(unpickled, data)
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def test_highest_protocol(self):
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# Of course this needs to be changed when HIGHEST_PROTOCOL changes.
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self.assertEqual(self.module.HIGHEST_PROTOCOL, 2)
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def test_callapi(self):
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from cStringIO import StringIO
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f = StringIO()
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f = cStringIO.StringIO()
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# With and without keyword arguments
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self.module.dump(123, f, -1)
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self.module.dump(123, file=f, protocol=-1)
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@ -1039,3 +1096,116 @@ class AbstractPersistentPicklerTests(unittest.TestCase):
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self.assertEqual(self.loads(self.dumps(L, 1)), L)
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self.assertEqual(self.id_count, 5)
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self.assertEqual(self.load_count, 5)
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class AbstractPicklerUnpicklerObjectTests(unittest.TestCase):
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pickler_class = None
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unpickler_class = None
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def setUp(self):
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assert self.pickler_class
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assert self.unpickler_class
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def test_clear_pickler_memo(self):
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# To test whether clear_memo() has any effect, we pickle an object,
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# then pickle it again without clearing the memo; the two serialized
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# forms should be different. If we clear_memo() and then pickle the
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# object again, the third serialized form should be identical to the
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# first one we obtained.
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data = ["abcdefg", "abcdefg", 44]
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f = cStringIO.StringIO()
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pickler = self.pickler_class(f)
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pickler.dump(data)
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first_pickled = f.getvalue()
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# Reset StringIO object.
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f.seek(0)
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f.truncate()
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pickler.dump(data)
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second_pickled = f.getvalue()
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# Reset the Pickler and StringIO objects.
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pickler.clear_memo()
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f.seek(0)
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f.truncate()
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pickler.dump(data)
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third_pickled = f.getvalue()
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self.assertNotEqual(first_pickled, second_pickled)
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self.assertEqual(first_pickled, third_pickled)
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def test_priming_pickler_memo(self):
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# Verify that we can set the Pickler's memo attribute.
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data = ["abcdefg", "abcdefg", 44]
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f = cStringIO.StringIO()
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pickler = self.pickler_class(f)
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pickler.dump(data)
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first_pickled = f.getvalue()
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f = cStringIO.StringIO()
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primed = self.pickler_class(f)
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primed.memo = pickler.memo
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primed.dump(data)
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primed_pickled = f.getvalue()
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self.assertNotEqual(first_pickled, primed_pickled)
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def test_priming_unpickler_memo(self):
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# Verify that we can set the Unpickler's memo attribute.
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data = ["abcdefg", "abcdefg", 44]
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f = cStringIO.StringIO()
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pickler = self.pickler_class(f)
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pickler.dump(data)
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first_pickled = f.getvalue()
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f = cStringIO.StringIO()
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primed = self.pickler_class(f)
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primed.memo = pickler.memo
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primed.dump(data)
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primed_pickled = f.getvalue()
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unpickler = self.unpickler_class(cStringIO.StringIO(first_pickled))
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unpickled_data1 = unpickler.load()
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self.assertEqual(unpickled_data1, data)
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primed = self.unpickler_class(cStringIO.StringIO(primed_pickled))
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primed.memo = unpickler.memo
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unpickled_data2 = primed.load()
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primed.memo.clear()
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self.assertEqual(unpickled_data2, data)
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self.assertTrue(unpickled_data2 is unpickled_data1)
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def test_reusing_unpickler_objects(self):
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data1 = ["abcdefg", "abcdefg", 44]
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f = cStringIO.StringIO()
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pickler = self.pickler_class(f)
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pickler.dump(data1)
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pickled1 = f.getvalue()
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data2 = ["abcdefg", 44, 44]
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f = cStringIO.StringIO()
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pickler = self.pickler_class(f)
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pickler.dump(data2)
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pickled2 = f.getvalue()
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f = cStringIO.StringIO()
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f.write(pickled1)
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f.seek(0)
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unpickler = self.unpickler_class(f)
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self.assertEqual(unpickler.load(), data1)
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f.seek(0)
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f.truncate()
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f.write(pickled2)
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f.seek(0)
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self.assertEqual(unpickler.load(), data2)
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@ -122,6 +122,10 @@ resources to test. Currently only the following are defined:
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gui - Run tests that require a running GUI.
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xpickle - Test pickle and cPickle against Python 2.4, 2.5 and 2.6 to
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test backwards compatibility. These tests take a long time
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to run.
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To enable all resources except one, use '-uall,-<resource>'. For
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example, to run all the tests except for the bsddb tests, give the
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option '-uall,-bsddb'.
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@ -175,7 +179,8 @@ if sys.platform == 'darwin':
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from test import test_support
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RESOURCE_NAMES = ('audio', 'curses', 'largefile', 'network', 'bsddb',
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'decimal', 'compiler', 'subprocess', 'urlfetch', 'gui')
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'decimal', 'compiler', 'subprocess', 'urlfetch', 'gui',
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'xpickle')
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def usage(code, msg=''):
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@ -1,6 +1,7 @@
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import cPickle, unittest
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from cStringIO import StringIO
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from test.pickletester import AbstractPickleTests, AbstractPickleModuleTests
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from test.pickletester import AbstractPicklerUnpicklerObjectTests
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from test import test_support
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class cPickleTests(AbstractPickleTests, AbstractPickleModuleTests):
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@ -90,6 +91,12 @@ class cPickleFastPicklerTests(AbstractPickleTests):
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b = self.loads(self.dumps(a))
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self.assertEqual(a, b)
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class cPicklePicklerUnpicklerObjectTests(AbstractPicklerUnpicklerObjectTests):
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pickler_class = cPickle.Pickler
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unpickler_class = cPickle.Unpickler
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class Node(object):
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pass
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@ -120,6 +127,7 @@ def test_main():
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cPickleListPicklerTests,
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cPickleFastPicklerTests,
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cPickleDeepRecursive,
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cPicklePicklerUnpicklerObjectTests,
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)
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if __name__ == "__main__":
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@ -6,6 +6,7 @@ from test import test_support
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from test.pickletester import AbstractPickleTests
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from test.pickletester import AbstractPickleModuleTests
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from test.pickletester import AbstractPersistentPicklerTests
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from test.pickletester import AbstractPicklerUnpicklerObjectTests
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class PickleTests(AbstractPickleTests, AbstractPickleModuleTests):
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@ -60,11 +61,18 @@ class PersPicklerTests(AbstractPersistentPicklerTests):
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u = PersUnpickler(f)
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return u.load()
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class PicklerUnpicklerObjectTests(AbstractPicklerUnpicklerObjectTests):
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pickler_class = pickle.Pickler
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unpickler_class = pickle.Unpickler
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def test_main():
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test_support.run_unittest(
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PickleTests,
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PicklerTests,
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PersPicklerTests
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PersPicklerTests,
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PicklerUnpicklerObjectTests,
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)
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test_support.run_doctest(pickle)
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@ -1,19 +1,42 @@
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# test_pickle dumps and loads pickles via pickle.py.
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# test_cpickle does the same, but via the cPickle module.
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# This test covers the other two cases, making pickles with one module and
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# loading them via the other.
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# loading them via the other. It also tests backwards compatibility with
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# previous version of Python by bouncing pickled objects through Python 2.4
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# and Python 2.5 running this file.
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import pickle
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import cPickle
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import os
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import os.path
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import pickle
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import subprocess
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import sys
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import types
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import unittest
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from test import test_support
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from test.pickletester import AbstractPickleTests
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# Most distro-supplied Pythons don't include the tests
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# or test support files, and some don't include a way to get these back even if
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# you're will to install extra packages (like Ubuntu). Doing things like this
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# "provides" a pickletester module for older versions of Python that may be
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# installed without it. Note that one other design for this involves messing
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# with sys.path, which is less precise.
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mod_path = os.path.abspath(os.path.join(os.path.dirname(__file__),
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"pickletester.py"))
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pickletester = types.ModuleType("test.pickletester")
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execfile(mod_path, pickletester.__dict__, pickletester.__dict__)
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AbstractPickleTests = pickletester.AbstractPickleTests
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if pickletester.__name__ in sys.modules:
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raise RuntimeError("Did not expect to find test.pickletester loaded")
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sys.modules[pickletester.__name__] = pickletester
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class DumpCPickle_LoadPickle(AbstractPickleTests):
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error = KeyError
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def dumps(self, arg, proto=0, fast=0):
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def dumps(self, arg, proto=0, fast=False):
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# Ignore fast
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return cPickle.dumps(arg, proto)
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@ -25,7 +48,7 @@ class DumpPickle_LoadCPickle(AbstractPickleTests):
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error = cPickle.BadPickleGet
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def dumps(self, arg, proto=0, fast=0):
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def dumps(self, arg, proto=0, fast=False):
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# Ignore fast
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return pickle.dumps(arg, proto)
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@ -33,11 +56,204 @@ class DumpPickle_LoadCPickle(AbstractPickleTests):
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# Ignore fast
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return cPickle.loads(buf)
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def have_python_version(name):
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"""Check whether the given name is a valid Python binary.
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This respects your PATH.
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Args:
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name: short string name of a Python binary such as "python2.4".
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Returns:
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True if the name is valid, False otherwise.
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"""
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return os.system(name + " -c 'import sys; sys.exit()'") == 0
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class AbstractCompatTests(AbstractPickleTests):
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module = None
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python = None
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error = None
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def setUp(self):
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self.assertTrue(self.python)
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self.assertTrue(self.module)
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self.assertTrue(self.error)
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def send_to_worker(self, python, obj, proto):
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"""Bounce a pickled object through another version of Python.
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This will pickle the object, send it to a child process where it will be
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unpickled, then repickled and sent back to the parent process.
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|
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Args:
|
||||
python: the name of the Python binary to start.
|
||||
obj: object to pickle.
|
||||
proto: pickle protocol number to use.
|
||||
|
||||
Returns:
|
||||
The pickled data received from the child process.
|
||||
"""
|
||||
# Prevent the subprocess from picking up invalid .pyc files.
|
||||
target = __file__
|
||||
if target[-1] in ("c", "o"):
|
||||
target = target[:-1]
|
||||
|
||||
data = self.module.dumps((proto, obj), proto)
|
||||
worker = subprocess.Popen([python, target, "worker"],
|
||||
stdin=subprocess.PIPE,
|
||||
stdout=subprocess.PIPE,
|
||||
stderr=subprocess.PIPE)
|
||||
stdout, stderr = worker.communicate(data)
|
||||
if worker.returncode != 0:
|
||||
raise RuntimeError(stderr)
|
||||
return stdout
|
||||
|
||||
def dumps(self, arg, proto=0, fast=False):
|
||||
return self.send_to_worker(self.python, arg, proto)
|
||||
|
||||
def loads(self, input):
|
||||
return self.module.loads(input)
|
||||
|
||||
# These tests are disabled because they require some special setup
|
||||
# on the worker that's hard to keep in sync.
|
||||
def test_global_ext1(self):
|
||||
pass
|
||||
|
||||
def test_global_ext2(self):
|
||||
pass
|
||||
|
||||
def test_global_ext4(self):
|
||||
pass
|
||||
|
||||
# This is a cut-down version of pickletester's test_float. Backwards
|
||||
# compatibility for the values in for_bin_protos was explicitly broken in
|
||||
# r68903 to fix a bug.
|
||||
def test_float(self):
|
||||
for_bin_protos = [4.94e-324, 1e-310]
|
||||
neg_for_bin_protos = [-x for x in for_bin_protos]
|
||||
test_values = [0.0, 7e-308, 6.626e-34, 0.1, 0.5,
|
||||
3.14, 263.44582062374053, 6.022e23, 1e30]
|
||||
test_proto0_values = test_values + [-x for x in test_values]
|
||||
test_values = test_proto0_values + for_bin_protos + neg_for_bin_protos
|
||||
|
||||
for value in test_proto0_values:
|
||||
pickle = self.dumps(value, 0)
|
||||
got = self.loads(pickle)
|
||||
self.assertEqual(value, got)
|
||||
|
||||
for proto in pickletester.protocols[1:]:
|
||||
for value in test_values:
|
||||
pickle = self.dumps(value, proto)
|
||||
got = self.loads(pickle)
|
||||
self.assertEqual(value, got)
|
||||
|
||||
# Backwards compatibility was explicitly broken in r67934 to fix a bug.
|
||||
def test_unicode_high_plane(self):
|
||||
pass
|
||||
|
||||
if test_support.have_unicode:
|
||||
# This is a cut-down version of pickletester's test_unicode. Backwards
|
||||
# compatibility was explicitly broken in r67934 to fix a bug.
|
||||
def test_unicode(self):
|
||||
endcases = [u'', u'<\\u>', u'<\\\u1234>', u'<\n>', u'<\\>']
|
||||
for proto in pickletester.protocols:
|
||||
for u in endcases:
|
||||
p = self.dumps(u, proto)
|
||||
u2 = self.loads(p)
|
||||
self.assertEqual(u2, u)
|
||||
|
||||
|
||||
def run_compat_test(python_name):
|
||||
return (test_support.is_resource_enabled("xpickle") and
|
||||
have_python_version(python_name))
|
||||
|
||||
|
||||
# Test backwards compatibility with Python 2.4.
|
||||
if not run_compat_test("python2.4"):
|
||||
class CPicklePython24Compat(unittest.TestCase):
|
||||
pass
|
||||
else:
|
||||
class CPicklePython24Compat(AbstractCompatTests):
|
||||
|
||||
module = cPickle
|
||||
python = "python2.4"
|
||||
error = cPickle.BadPickleGet
|
||||
|
||||
# Disable these tests for Python 2.4. Making them pass would require
|
||||
# nontrivially monkeypatching the pickletester module in the worker.
|
||||
def test_reduce_calls_base(self):
|
||||
pass
|
||||
|
||||
def test_reduce_ex_calls_base(self):
|
||||
pass
|
||||
|
||||
class PicklePython24Compat(CPicklePython24Compat):
|
||||
|
||||
module = pickle
|
||||
error = KeyError
|
||||
|
||||
|
||||
# Test backwards compatibility with Python 2.5.
|
||||
if not run_compat_test("python2.5"):
|
||||
class CPicklePython25Compat(unittest.TestCase):
|
||||
pass
|
||||
else:
|
||||
class CPicklePython25Compat(AbstractCompatTests):
|
||||
|
||||
module = cPickle
|
||||
python = "python2.5"
|
||||
error = cPickle.BadPickleGet
|
||||
|
||||
class PicklePython25Compat(CPicklePython25Compat):
|
||||
|
||||
module = pickle
|
||||
error = KeyError
|
||||
|
||||
|
||||
# Test backwards compatibility with Python 2.6.
|
||||
if not run_compat_test("python2.6"):
|
||||
class CPicklePython26Compat(unittest.TestCase):
|
||||
pass
|
||||
else:
|
||||
class CPicklePython26Compat(AbstractCompatTests):
|
||||
|
||||
module = cPickle
|
||||
python = "python2.6"
|
||||
error = cPickle.BadPickleGet
|
||||
|
||||
class PicklePython26Compat(CPicklePython26Compat):
|
||||
|
||||
module = pickle
|
||||
error = KeyError
|
||||
|
||||
|
||||
def worker_main(in_stream, out_stream):
|
||||
message = cPickle.load(in_stream)
|
||||
protocol, obj = message
|
||||
cPickle.dump(obj, out_stream, protocol)
|
||||
|
||||
|
||||
def test_main():
|
||||
if not test_support.is_resource_enabled("xpickle"):
|
||||
print >>sys.stderr, "test_xpickle -- skipping backwards compat tests."
|
||||
print >>sys.stderr, "Use 'regrtest.py -u xpickle' to run them."
|
||||
sys.stderr.flush()
|
||||
|
||||
test_support.run_unittest(
|
||||
DumpCPickle_LoadPickle,
|
||||
DumpPickle_LoadCPickle
|
||||
DumpPickle_LoadCPickle,
|
||||
CPicklePython24Compat,
|
||||
CPicklePython25Compat,
|
||||
CPicklePython26Compat,
|
||||
PicklePython24Compat,
|
||||
PicklePython25Compat,
|
||||
PicklePython26Compat,
|
||||
)
|
||||
|
||||
if __name__ == "__main__":
|
||||
if "worker" in sys.argv:
|
||||
worker_main(sys.stdin, sys.stdout)
|
||||
else:
|
||||
test_main()
|
||||
|
|
|
|||
Loading…
Reference in New Issue