351 lines
12 KiB
Python
351 lines
12 KiB
Python
from test import support
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import array
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import io
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import marshal
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import sys
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import unittest
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import os
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import types
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class HelperMixin:
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def helper(self, sample, *extra):
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new = marshal.loads(marshal.dumps(sample, *extra))
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self.assertEqual(sample, new)
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try:
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with open(support.TESTFN, "wb") as f:
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marshal.dump(sample, f, *extra)
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with open(support.TESTFN, "rb") as f:
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new = marshal.load(f)
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self.assertEqual(sample, new)
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finally:
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support.unlink(support.TESTFN)
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class IntTestCase(unittest.TestCase, HelperMixin):
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def test_ints(self):
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# Test the full range of Python ints.
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n = sys.maxsize
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while n:
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for expected in (-n, n):
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self.helper(expected)
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n = n >> 1
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def test_int64(self):
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# Simulate int marshaling on a 64-bit box. This is most interesting if
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# we're running the test on a 32-bit box, of course.
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def to_little_endian_string(value, nbytes):
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b = bytearray()
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for i in range(nbytes):
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b.append(value & 0xff)
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value >>= 8
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return b
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maxint64 = (1 << 63) - 1
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minint64 = -maxint64-1
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for base in maxint64, minint64, -maxint64, -(minint64 >> 1):
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while base:
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s = b'I' + to_little_endian_string(base, 8)
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got = marshal.loads(s)
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self.assertEqual(base, got)
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if base == -1: # a fixed-point for shifting right 1
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base = 0
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else:
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base >>= 1
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def test_bool(self):
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for b in (True, False):
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self.helper(b)
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class FloatTestCase(unittest.TestCase, HelperMixin):
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def test_floats(self):
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# Test a few floats
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small = 1e-25
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n = sys.maxsize * 3.7e250
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while n > small:
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for expected in (-n, n):
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self.helper(float(expected))
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n /= 123.4567
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f = 0.0
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s = marshal.dumps(f, 2)
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got = marshal.loads(s)
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self.assertEqual(f, got)
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# and with version <= 1 (floats marshalled differently then)
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s = marshal.dumps(f, 1)
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got = marshal.loads(s)
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self.assertEqual(f, got)
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n = sys.maxsize * 3.7e-250
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while n < small:
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for expected in (-n, n):
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f = float(expected)
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self.helper(f)
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self.helper(f, 1)
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n *= 123.4567
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class StringTestCase(unittest.TestCase, HelperMixin):
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def test_unicode(self):
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for s in ["", "Andr\xe8 Previn", "abc", " "*10000]:
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self.helper(marshal.loads(marshal.dumps(s)))
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def test_string(self):
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for s in ["", "Andr\xe8 Previn", "abc", " "*10000]:
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self.helper(s)
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def test_bytes(self):
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for s in [b"", b"Andr\xe8 Previn", b"abc", b" "*10000]:
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self.helper(s)
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class ExceptionTestCase(unittest.TestCase):
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def test_exceptions(self):
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new = marshal.loads(marshal.dumps(StopIteration))
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self.assertEqual(StopIteration, new)
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class CodeTestCase(unittest.TestCase):
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def test_code(self):
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co = ExceptionTestCase.test_exceptions.__code__
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new = marshal.loads(marshal.dumps(co))
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self.assertEqual(co, new)
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def test_many_codeobjects(self):
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# Issue2957: bad recursion count on code objects
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count = 5000 # more than MAX_MARSHAL_STACK_DEPTH
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codes = (ExceptionTestCase.test_exceptions.__code__,) * count
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marshal.loads(marshal.dumps(codes))
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def test_different_filenames(self):
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co1 = compile("x", "f1", "exec")
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co2 = compile("y", "f2", "exec")
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co1, co2 = marshal.loads(marshal.dumps((co1, co2)))
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self.assertEqual(co1.co_filename, "f1")
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self.assertEqual(co2.co_filename, "f2")
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@support.cpython_only
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def test_same_filename_used(self):
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s = """def f(): pass\ndef g(): pass"""
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co = compile(s, "myfile", "exec")
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co = marshal.loads(marshal.dumps(co))
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for obj in co.co_consts:
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if isinstance(obj, types.CodeType):
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self.assertIs(co.co_filename, obj.co_filename)
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class ContainerTestCase(unittest.TestCase, HelperMixin):
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d = {'astring': 'foo@bar.baz.spam',
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'afloat': 7283.43,
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'anint': 2**20,
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'ashortlong': 2,
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'alist': ['.zyx.41'],
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'atuple': ('.zyx.41',)*10,
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'aboolean': False,
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'aunicode': "Andr\xe8 Previn"
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}
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def test_dict(self):
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self.helper(self.d)
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def test_list(self):
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self.helper(list(self.d.items()))
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def test_tuple(self):
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self.helper(tuple(self.d.keys()))
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def test_sets(self):
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for constructor in (set, frozenset):
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self.helper(constructor(self.d.keys()))
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class BufferTestCase(unittest.TestCase, HelperMixin):
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def test_bytearray(self):
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b = bytearray(b"abc")
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self.helper(b)
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new = marshal.loads(marshal.dumps(b))
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self.assertEqual(type(new), bytes)
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def test_memoryview(self):
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b = memoryview(b"abc")
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self.helper(b)
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new = marshal.loads(marshal.dumps(b))
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self.assertEqual(type(new), bytes)
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def test_array(self):
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a = array.array('B', b"abc")
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new = marshal.loads(marshal.dumps(a))
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self.assertEqual(new, b"abc")
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class BugsTestCase(unittest.TestCase):
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def test_bug_5888452(self):
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# Simple-minded check for SF 588452: Debug build crashes
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marshal.dumps([128] * 1000)
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def test_patch_873224(self):
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self.assertRaises(Exception, marshal.loads, '0')
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self.assertRaises(Exception, marshal.loads, 'f')
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self.assertRaises(Exception, marshal.loads, marshal.dumps(2**65)[:-1])
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def test_version_argument(self):
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# Python 2.4.0 crashes for any call to marshal.dumps(x, y)
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self.assertEqual(marshal.loads(marshal.dumps(5, 0)), 5)
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self.assertEqual(marshal.loads(marshal.dumps(5, 1)), 5)
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def test_fuzz(self):
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# simple test that it's at least not *totally* trivial to
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# crash from bad marshal data
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for c in [chr(i) for i in range(256)]:
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try:
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marshal.loads(c)
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except Exception:
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pass
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def test_loads_recursion(self):
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s = b'c' + (b'X' * 4*4) + b'{' * 2**20
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self.assertRaises(ValueError, marshal.loads, s)
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def test_recursion_limit(self):
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# Create a deeply nested structure.
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head = last = []
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# The max stack depth should match the value in Python/marshal.c.
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if os.name == 'nt' and hasattr(sys, 'gettotalrefcount'):
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MAX_MARSHAL_STACK_DEPTH = 1500
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else:
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MAX_MARSHAL_STACK_DEPTH = 2000
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for i in range(MAX_MARSHAL_STACK_DEPTH - 2):
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last.append([0])
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last = last[-1]
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# Verify we don't blow out the stack with dumps/load.
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data = marshal.dumps(head)
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new_head = marshal.loads(data)
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# Don't use == to compare objects, it can exceed the recursion limit.
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self.assertEqual(len(new_head), len(head))
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self.assertEqual(len(new_head[0]), len(head[0]))
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self.assertEqual(len(new_head[-1]), len(head[-1]))
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last.append([0])
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self.assertRaises(ValueError, marshal.dumps, head)
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def test_exact_type_match(self):
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# Former bug:
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# >>> class Int(int): pass
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# >>> type(loads(dumps(Int())))
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# <type 'int'>
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for typ in (int, float, complex, tuple, list, dict, set, frozenset):
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# Note: str subclasses are not tested because they get handled
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# by marshal's routines for objects supporting the buffer API.
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subtyp = type('subtyp', (typ,), {})
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self.assertRaises(ValueError, marshal.dumps, subtyp())
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# Issue #1792 introduced a change in how marshal increases the size of its
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# internal buffer; this test ensures that the new code is exercised.
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def test_large_marshal(self):
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size = int(1e6)
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testString = 'abc' * size
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marshal.dumps(testString)
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def test_invalid_longs(self):
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# Issue #7019: marshal.loads shouldn't produce unnormalized PyLongs
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invalid_string = b'l\x02\x00\x00\x00\x00\x00\x00\x00'
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self.assertRaises(ValueError, marshal.loads, invalid_string)
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def test_multiple_dumps_and_loads(self):
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# Issue 12291: marshal.load() should be callable multiple times
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# with interleaved data written by non-marshal code
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# Adapted from a patch by Engelbert Gruber.
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data = (1, 'abc', b'def', 1.0, (2, 'a', ['b', b'c']))
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for interleaved in (b'', b'0123'):
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ilen = len(interleaved)
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positions = []
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try:
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with open(support.TESTFN, 'wb') as f:
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for d in data:
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marshal.dump(d, f)
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if ilen:
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f.write(interleaved)
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positions.append(f.tell())
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with open(support.TESTFN, 'rb') as f:
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for i, d in enumerate(data):
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self.assertEqual(d, marshal.load(f))
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if ilen:
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f.read(ilen)
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self.assertEqual(positions[i], f.tell())
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finally:
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support.unlink(support.TESTFN)
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def test_loads_reject_unicode_strings(self):
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# Issue #14177: marshal.loads() should not accept unicode strings
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unicode_string = 'T'
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self.assertRaises(TypeError, marshal.loads, unicode_string)
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def test_bad_reader(self):
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class BadReader(io.BytesIO):
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def read(self, n=-1):
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b = super().read(n)
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if n is not None and n > 4:
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b += b' ' * 10**6
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return b
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for value in (1.0, 1j, b'0123456789', '0123456789'):
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self.assertRaises(ValueError, marshal.load,
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BadReader(marshal.dumps(value)))
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LARGE_SIZE = 2**31
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pointer_size = 8 if sys.maxsize > 0xFFFFFFFF else 4
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class NullWriter:
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def write(self, s):
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pass
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@unittest.skipIf(LARGE_SIZE > sys.maxsize, "test cannot run on 32-bit systems")
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class LargeValuesTestCase(unittest.TestCase):
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def check_unmarshallable(self, data):
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self.assertRaises(ValueError, marshal.dump, data, NullWriter())
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@support.bigmemtest(size=LARGE_SIZE, memuse=2, dry_run=False)
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def test_bytes(self, size):
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self.check_unmarshallable(b'x' * size)
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@support.bigmemtest(size=LARGE_SIZE, memuse=2, dry_run=False)
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def test_str(self, size):
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self.check_unmarshallable('x' * size)
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@support.bigmemtest(size=LARGE_SIZE, memuse=pointer_size + 1, dry_run=False)
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def test_tuple(self, size):
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self.check_unmarshallable((None,) * size)
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@support.bigmemtest(size=LARGE_SIZE, memuse=pointer_size + 1, dry_run=False)
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def test_list(self, size):
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self.check_unmarshallable([None] * size)
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@support.bigmemtest(size=LARGE_SIZE,
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memuse=pointer_size*12 + sys.getsizeof(LARGE_SIZE-1),
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dry_run=False)
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def test_set(self, size):
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self.check_unmarshallable(set(range(size)))
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@support.bigmemtest(size=LARGE_SIZE,
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memuse=pointer_size*12 + sys.getsizeof(LARGE_SIZE-1),
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dry_run=False)
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def test_frozenset(self, size):
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self.check_unmarshallable(frozenset(range(size)))
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@support.bigmemtest(size=LARGE_SIZE, memuse=2, dry_run=False)
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def test_bytearray(self, size):
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self.check_unmarshallable(bytearray(size))
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def test_main():
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support.run_unittest(IntTestCase,
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FloatTestCase,
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StringTestCase,
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CodeTestCase,
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ContainerTestCase,
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ExceptionTestCase,
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BufferTestCase,
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BugsTestCase,
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LargeValuesTestCase,
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)
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if __name__ == "__main__":
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test_main()
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