diff options
Diffstat (limited to 'Lib/test/test_marshal.py')
| -rw-r--r-- | Lib/test/test_marshal.py | 163 |
1 files changed, 132 insertions, 31 deletions
diff --git a/Lib/test/test_marshal.py b/Lib/test/test_marshal.py index 7e37f39c6a..255eb87bb3 100644 --- a/Lib/test/test_marshal.py +++ b/Lib/test/test_marshal.py @@ -24,37 +24,13 @@ class HelperMixin: class IntTestCase(unittest.TestCase, HelperMixin): def test_ints(self): - # Test the full range of Python ints. - n = sys.maxsize + # Test a range of Python ints larger than the machine word size. + n = sys.maxsize ** 2 while n: for expected in (-n, n): self.helper(expected) n = n >> 1 - def test_int64(self): - # Simulate int marshaling on a 64-bit box. This is most interesting if - # we're running the test on a 32-bit box, of course. - - def to_little_endian_string(value, nbytes): - b = bytearray() - for i in range(nbytes): - b.append(value & 0xff) - value >>= 8 - return b - - maxint64 = (1 << 63) - 1 - minint64 = -maxint64-1 - - for base in maxint64, minint64, -maxint64, -(minint64 >> 1): - while base: - s = b'I' + to_little_endian_string(base, 8) - got = marshal.loads(s) - self.assertEqual(base, got) - if base == -1: # a fixed-point for shifting right 1 - base = 0 - else: - base >>= 1 - def test_bool(self): for b in (True, False): self.helper(b) @@ -201,10 +177,14 @@ class BugsTestCase(unittest.TestCase): except Exception: pass - def test_loads_recursion(self): + def test_loads_2x_code(self): s = b'c' + (b'X' * 4*4) + b'{' * 2**20 self.assertRaises(ValueError, marshal.loads, s) + def test_loads_recursion(self): + s = b'c' + (b'X' * 4*5) + b'{' * 2**20 + self.assertRaises(ValueError, marshal.loads, s) + def test_recursion_limit(self): # Create a deeply nested structure. head = last = [] @@ -282,15 +262,20 @@ class BugsTestCase(unittest.TestCase): def test_bad_reader(self): class BadReader(io.BytesIO): - def read(self, n=-1): - b = super().read(n) + def readinto(self, buf): + n = super().readinto(buf) if n is not None and n > 4: - b += b' ' * 10**6 - return b + n += 10**6 + return n for value in (1.0, 1j, b'0123456789', '0123456789'): self.assertRaises(ValueError, marshal.load, BadReader(marshal.dumps(value))) + def _test_eof(self): + data = marshal.dumps(("hello", "dolly", None)) + for i in range(len(data)): + self.assertRaises(EOFError, marshal.loads, data[0: i]) + LARGE_SIZE = 2**31 pointer_size = 8 if sys.maxsize > 0xFFFFFFFF else 4 @@ -335,6 +320,122 @@ class LargeValuesTestCase(unittest.TestCase): def test_bytearray(self, size): self.check_unmarshallable(bytearray(size)) +def CollectObjectIDs(ids, obj): + """Collect object ids seen in a structure""" + if id(obj) in ids: + return + ids.add(id(obj)) + if isinstance(obj, (list, tuple, set, frozenset)): + for e in obj: + CollectObjectIDs(ids, e) + elif isinstance(obj, dict): + for k, v in obj.items(): + CollectObjectIDs(ids, k) + CollectObjectIDs(ids, v) + return len(ids) + +class InstancingTestCase(unittest.TestCase, HelperMixin): + intobj = 123321 + floatobj = 1.2345 + strobj = "abcde"*3 + dictobj = {"hello":floatobj, "goodbye":floatobj, floatobj:"hello"} + + def helper3(self, rsample, recursive=False, simple=False): + #we have two instances + sample = (rsample, rsample) + + n0 = CollectObjectIDs(set(), sample) + + s3 = marshal.dumps(sample, 3) + n3 = CollectObjectIDs(set(), marshal.loads(s3)) + + #same number of instances generated + self.assertEqual(n3, n0) + + if not recursive: + #can compare with version 2 + s2 = marshal.dumps(sample, 2) + n2 = CollectObjectIDs(set(), marshal.loads(s2)) + #old format generated more instances + self.assertGreater(n2, n0) + + #if complex objects are in there, old format is larger + if not simple: + self.assertGreater(len(s2), len(s3)) + else: + self.assertGreaterEqual(len(s2), len(s3)) + + def testInt(self): + self.helper(self.intobj) + self.helper3(self.intobj, simple=True) + + def testFloat(self): + self.helper(self.floatobj) + self.helper3(self.floatobj) + + def testStr(self): + self.helper(self.strobj) + self.helper3(self.strobj) + + def testDict(self): + self.helper(self.dictobj) + self.helper3(self.dictobj) + + def testModule(self): + with open(__file__, "rb") as f: + code = f.read() + if __file__.endswith(".py"): + code = compile(code, __file__, "exec") + self.helper(code) + self.helper3(code) + + def testRecursion(self): + d = dict(self.dictobj) + d["self"] = d + self.helper3(d, recursive=True) + l = [self.dictobj] + l.append(l) + self.helper3(l, recursive=True) + +class CompatibilityTestCase(unittest.TestCase): + def _test(self, version): + with open(__file__, "rb") as f: + code = f.read() + if __file__.endswith(".py"): + code = compile(code, __file__, "exec") + data = marshal.dumps(code, version) + marshal.loads(data) + + def test0To3(self): + self._test(0) + + def test1To3(self): + self._test(1) + + def test2To3(self): + self._test(2) + + def test3To3(self): + self._test(3) + +class InterningTestCase(unittest.TestCase, HelperMixin): + strobj = "this is an interned string" + strobj = sys.intern(strobj) + + def testIntern(self): + s = marshal.loads(marshal.dumps(self.strobj)) + self.assertEqual(s, self.strobj) + self.assertEqual(id(s), id(self.strobj)) + s2 = sys.intern(s) + self.assertEqual(id(s2), id(s)) + + def testNoIntern(self): + s = marshal.loads(marshal.dumps(self.strobj, 2)) + self.assertEqual(s, self.strobj) + self.assertNotEqual(id(s), id(self.strobj)) + s2 = sys.intern(s) + self.assertNotEqual(id(s2), id(s)) + def test_main(): support.run_unittest(IntTestCase, |