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Python Source | 2003-03-02 | 29.8 KB | 959 lines

import unittest import pickle import cPickle import pickletools import copy_reg from test.test_support import TestFailed, have_unicode, TESTFN # Tests that try a number of pickle protocols should have a # for proto in protocols: # kind of outer loop. assert pickle.HIGHEST_PROTOCOL == cPickle.HIGHEST_PROTOCOL == 2 protocols = range(pickle.HIGHEST_PROTOCOL + 1) # Return True if opcode code appears in the pickle, else False. def opcode_in_pickle(code, pickle): for op, dummy, dummy in pickletools.genops(pickle): if op.code == code: return True return False # Return the number of times opcode code appears in pickle. def count_opcode(code, pickle): n = 0 for op, dummy, dummy in pickletools.genops(pickle): if op.code == code: n += 1 return n # We can't very well test the extension registry without putting known stuff # in it, but we have to be careful to restore its original state. Code # should do this: # # e = ExtensionSaver(extension_code) # try: # fiddle w/ the extension registry's stuff for extension_code # finally: # e.restore() class ExtensionSaver: # Remember current registration for code (if any), and remove it (if # there is one). def __init__(self, code): self.code = code if code in copy_reg._inverted_registry: self.pair = copy_reg._inverted_registry[code] copy_reg.remove_extension(self.pair[0], self.pair[1], code) else: self.pair = None # Restore previous registration for code. def restore(self): code = self.code curpair = copy_reg._inverted_registry.get(code) if curpair is not None: copy_reg.remove_extension(curpair[0], curpair[1], code) pair = self.pair if pair is not None: copy_reg.add_extension(pair[0], pair[1], code) class C: def __cmp__(self, other): return cmp(self.__dict__, other.__dict__) import __main__ __main__.C = C C.__module__ = "__main__" class myint(int): def __init__(self, x): self.str = str(x) class initarg(C): def __init__(self, a, b): self.a = a self.b = b def __getinitargs__(self): return self.a, self.b class metaclass(type): pass class use_metaclass(object): __metaclass__ = metaclass # DATA0 .. DATA2 are the pickles we expect under the various protocols, for # the object returned by create_data(). # break into multiple strings to avoid confusing font-lock-mode DATA0 = """(lp1 I0 aL1L aF2 ac__builtin__ complex p2 """ + \ """(F3 F0 tRp3 aI1 aI-1 aI255 aI-255 aI-256 aI65535 aI-65535 aI-65536 aI2147483647 aI-2147483647 aI-2147483648 a""" + \ """(S'abc' p4 g4 """ + \ """(i__main__ C p5 """ + \ """(dp6 S'foo' p7 I1 sS'bar' p8 I2 sbg5 tp9 ag9 aI5 a. """ # Disassembly of DATA0. DATA0_DIS = """\ 0: ( MARK 1: l LIST (MARK at 0) 2: p PUT 1 5: I INT 0 8: a APPEND 9: L LONG 1L 13: a APPEND 14: F FLOAT 2.0 17: a APPEND 18: c GLOBAL '__builtin__ complex' 39: p PUT 2 42: ( MARK 43: F FLOAT 3.0 46: F FLOAT 0.0 49: t TUPLE (MARK at 42) 50: R REDUCE 51: p PUT 3 54: a APPEND 55: I INT 1 58: a APPEND 59: I INT -1 63: a APPEND 64: I INT 255 69: a APPEND 70: I INT -255 76: a APPEND 77: I INT -256 83: a APPEND 84: I INT 65535 91: a APPEND 92: I INT -65535 100: a APPEND 101: I INT -65536 109: a APPEND 110: I INT 2147483647 122: a APPEND 123: I INT -2147483647 136: a APPEND 137: I INT -2147483648 150: a APPEND 151: ( MARK 152: S STRING 'abc' 159: p PUT 4 162: g GET 4 165: ( MARK 166: i INST '__main__ C' (MARK at 165) 178: p PUT 5 181: ( MARK 182: d DICT (MARK at 181) 183: p PUT 6 186: S STRING 'foo' 193: p PUT 7 196: I INT 1 199: s SETITEM 200: S STRING 'bar' 207: p PUT 8 210: I INT 2 213: s SETITEM 214: b BUILD 215: g GET 5 218: t TUPLE (MARK at 151) 219: p PUT 9 222: a APPEND 223: g GET 9 226: a APPEND 227: I INT 5 230: a APPEND 231: . STOP highest protocol among opcodes = 0 """ DATA1 = (']q\x01(K\x00L1L\nG@\x00\x00\x00\x00\x00\x00\x00' 'c__builtin__\ncomplex\nq\x02(G@\x08\x00\x00\x00\x00\x00' '\x00G\x00\x00\x00\x00\x00\x00\x00\x00tRq\x03K\x01J\xff\xff' '\xff\xffK\xffJ\x01\xff\xff\xffJ\x00\xff\xff\xffM\xff\xff' 'J\x01\x00\xff\xffJ\x00\x00\xff\xffJ\xff\xff\xff\x7fJ\x01\x00' '\x00\x80J\x00\x00\x00\x80(U\x03abcq\x04h\x04(c__main__\n' 'C\nq\x05oq\x06}q\x07(U\x03fooq\x08K\x01U\x03barq\tK\x02ubh' '\x06tq\nh\nK\x05e.' ) # Disassembly of DATA1. DATA1_DIS = """\ 0: ] EMPTY_LIST 1: q BINPUT 1 3: ( MARK 4: K BININT1 0 6: L LONG 1L 10: G BINFLOAT 2.0 19: c GLOBAL '__builtin__ complex' 40: q BINPUT 2 42: ( MARK 43: G BINFLOAT 3.0 52: G BINFLOAT 0.0 61: t TUPLE (MARK at 42) 62: R REDUCE 63: q BINPUT 3 65: K BININT1 1 67: J BININT -1 72: K BININT1 255 74: J BININT -255 79: J BININT -256 84: M BININT2 65535 87: J BININT -65535 92: J BININT -65536 97: J BININT 2147483647 102: J BININT -2147483647 107: J BININT -2147483648 112: ( MARK 113: U SHORT_BINSTRING 'abc' 118: q BINPUT 4 120: h BINGET 4 122: ( MARK 123: c GLOBAL '__main__ C' 135: q BINPUT 5 137: o OBJ (MARK at 122) 138: q BINPUT 6 140: } EMPTY_DICT 141: q BINPUT 7 143: ( MARK 144: U SHORT_BINSTRING 'foo' 149: q BINPUT 8 151: K BININT1 1 153: U SHORT_BINSTRING 'bar' 158: q BINPUT 9 160: K BININT1 2 162: u SETITEMS (MARK at 143) 163: b BUILD 164: h BINGET 6 166: t TUPLE (MARK at 112) 167: q BINPUT 10 169: h BINGET 10 171: K BININT1 5 173: e APPENDS (MARK at 3) 174: . STOP highest protocol among opcodes = 1 """ DATA2 = ('\x80\x02]q\x01(K\x00\x8a\x01\x01G@\x00\x00\x00\x00\x00\x00\x00' 'c__builtin__\ncomplex\nq\x02G@\x08\x00\x00\x00\x00\x00\x00G\x00' '\x00\x00\x00\x00\x00\x00\x00\x86Rq\x03K\x01J\xff\xff\xff\xffK' '\xffJ\x01\xff\xff\xffJ\x00\xff\xff\xffM\xff\xffJ\x01\x00\xff\xff' 'J\x00\x00\xff\xffJ\xff\xff\xff\x7fJ\x01\x00\x00\x80J\x00\x00\x00' '\x80(U\x03abcq\x04h\x04(c__main__\nC\nq\x05oq\x06}q\x07(U\x03foo' 'q\x08K\x01U\x03barq\tK\x02ubh\x06tq\nh\nK\x05e.') # Disassembly of DATA2. DATA2_DIS = """\ 0: \x80 PROTO 2 2: ] EMPTY_LIST 3: q BINPUT 1 5: ( MARK 6: K BININT1 0 8: \x8a LONG1 1L 11: G BINFLOAT 2.0 20: c GLOBAL '__builtin__ complex' 41: q BINPUT 2 43: G BINFLOAT 3.0 52: G BINFLOAT 0.0 61: \x86 TUPLE2 62: R REDUCE 63: q BINPUT 3 65: K BININT1 1 67: J BININT -1 72: K BININT1 255 74: J BININT -255 79: J BININT -256 84: M BININT2 65535 87: J BININT -65535 92: J BININT -65536 97: J BININT 2147483647 102: J BININT -2147483647 107: J BININT -2147483648 112: ( MARK 113: U SHORT_BINSTRING 'abc' 118: q BINPUT 4 120: h BINGET 4 122: ( MARK 123: c GLOBAL '__main__ C' 135: q BINPUT 5 137: o OBJ (MARK at 122) 138: q BINPUT 6 140: } EMPTY_DICT 141: q BINPUT 7 143: ( MARK 144: U SHORT_BINSTRING 'foo' 149: q BINPUT 8 151: K BININT1 1 153: U SHORT_BINSTRING 'bar' 158: q BINPUT 9 160: K BININT1 2 162: u SETITEMS (MARK at 143) 163: b BUILD 164: h BINGET 6 166: t TUPLE (MARK at 112) 167: q BINPUT 10 169: h BINGET 10 171: K BININT1 5 173: e APPENDS (MARK at 5) 174: . STOP highest protocol among opcodes = 2 """ def create_data(): c = C() c.foo = 1 c.bar = 2 x = [0, 1L, 2.0, 3.0+0j] # Append some integer test cases at cPickle.c's internal size # cutoffs. uint1max = 0xff uint2max = 0xffff int4max = 0x7fffffff x.extend([1, -1, uint1max, -uint1max, -uint1max-1, uint2max, -uint2max, -uint2max-1, int4max, -int4max, -int4max-1]) y = ('abc', 'abc', c, c) x.append(y) x.append(y) x.append(5) return x class AbstractPickleTests(unittest.TestCase): # Subclass must define self.dumps, self.loads, self.error. _testdata = create_data() def setUp(self): pass def test_misc(self): # test various datatypes not tested by testdata for proto in protocols: x = myint(4) s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(x, y) x = (1, ()) s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(x, y) x = initarg(1, x) s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(x, y) # XXX test __reduce__ protocol? def test_roundtrip_equality(self): expected = self._testdata for proto in protocols: s = self.dumps(expected, proto) got = self.loads(s) self.assertEqual(expected, got) def test_load_from_canned_string(self): expected = self._testdata for canned in DATA0, DATA1, DATA2: got = self.loads(canned) self.assertEqual(expected, got) # There are gratuitous differences between pickles produced by # pickle and cPickle, largely because cPickle starts PUT indices at # 1 and pickle starts them at 0. See XXX comment in cPickle's put2() -- # there's a comment with an exclamation point there whose meaning # is a mystery. cPickle also suppresses PUT for objects with a refcount # of 1. def dont_test_disassembly(self): from cStringIO import StringIO from pickletools import dis for proto, expected in (0, DATA0_DIS), (1, DATA1_DIS): s = self.dumps(self._testdata, proto) filelike = StringIO() dis(s, out=filelike) got = filelike.getvalue() self.assertEqual(expected, got) def test_recursive_list(self): l = [] l.append(l) for proto in protocols: s = self.dumps(l, proto) x = self.loads(s) self.assertEqual(x, l) self.assertEqual(x, x[0]) self.assertEqual(id(x), id(x[0])) def test_recursive_dict(self): d = {} d[1] = d for proto in protocols: s = self.dumps(d, proto) x = self.loads(s) self.assertEqual(x, d) self.assertEqual(x[1], x) self.assertEqual(id(x[1]), id(x)) def test_recursive_inst(self): i = C() i.attr = i for proto in protocols: s = self.dumps(i, 2) x = self.loads(s) self.assertEqual(x, i) self.assertEqual(x.attr, x) self.assertEqual(id(x.attr), id(x)) def test_recursive_multi(self): l = [] d = {1:l} i = C() i.attr = d l.append(i) for proto in protocols: s = self.dumps(l, proto) x = self.loads(s) self.assertEqual(x, l) self.assertEqual(x[0], i) self.assertEqual(x[0].attr, d) self.assertEqual(x[0].attr[1], x) self.assertEqual(x[0].attr[1][0], i) self.assertEqual(x[0].attr[1][0].attr, d) def test_garyp(self): self.assertRaises(self.error, self.loads, 'garyp') def test_insecure_strings(self): insecure = ["abc", "2 + 2", # not quoted #"'abc' + 'def'", # not a single quoted string "'abc", # quote is not closed "'abc\"", # open quote and close quote don't match "'abc' ?", # junk after close quote "'\\'", # trailing backslash # some tests of the quoting rules #"'abc\"\''", #"'\\\\a\'\'\'\\\'\\\\\''", ] for s in insecure: buf = "S" + s + "\012p0\012." self.assertRaises(ValueError, self.loads, buf) if have_unicode: def test_unicode(self): endcases = [unicode(''), unicode('<\\u>'), unicode('<\\\u1234>'), unicode('<\n>'), unicode('<\\>')] for proto in protocols: for u in endcases: p = self.dumps(u, proto) u2 = self.loads(p) self.assertEqual(u2, u) def test_ints(self): import sys for proto in protocols: n = sys.maxint while n: for expected in (-n, n): s = self.dumps(expected, proto) n2 = self.loads(s) self.assertEqual(expected, n2) n = n >> 1 def test_maxint64(self): maxint64 = (1L << 63) - 1 data = 'I' + str(maxint64) + '\n.' got = self.loads(data) self.assertEqual(got, maxint64) # Try too with a bogus literal. data = 'I' + str(maxint64) + 'JUNK\n.' self.assertRaises(ValueError, self.loads, data) def test_long(self): for proto in protocols: # 256 bytes is where LONG4 begins. for nbits in 1, 8, 8*254, 8*255, 8*256, 8*257: nbase = 1L << nbits for npos in nbase-1, nbase, nbase+1: for n in npos, -npos: pickle = self.dumps(n, proto) got = self.loads(pickle) self.assertEqual(n, got) # Try a monster. This is quadratic-time in protos 0 & 1, so don't # bother with those. nbase = long("deadbeeffeedface", 16) nbase += nbase << 1000000 for n in nbase, -nbase: p = self.dumps(n, 2) got = self.loads(p) self.assertEqual(n, got) def test_reduce(self): pass def test_getinitargs(self): pass def test_metaclass(self): a = use_metaclass() for proto in protocols: s = self.dumps(a, proto) b = self.loads(s) self.assertEqual(a.__class__, b.__class__) def test_structseq(self): import time import os t = time.localtime() for proto in protocols: s = self.dumps(t, proto) u = self.loads(s) self.assertEqual(t, u) if hasattr(os, "stat"): t = os.stat(os.curdir) s = self.dumps(t, proto) u = self.loads(s) self.assertEqual(t, u) if hasattr(os, "statvfs"): t = os.statvfs(os.curdir) s = self.dumps(t, proto) u = self.loads(s) self.assertEqual(t, u) # Tests for protocol 2 def test_proto(self): build_none = pickle.NONE + pickle.STOP for proto in protocols: expected = build_none if proto >= 2: expected = pickle.PROTO + chr(proto) + expected p = self.dumps(None, proto) self.assertEqual(p, expected) oob = protocols[-1] + 1 # a future protocol badpickle = pickle.PROTO + chr(oob) + build_none try: self.loads(badpickle) except ValueError, detail: self.failUnless(str(detail).startswith( "unsupported pickle protocol")) else: self.fail("expected bad protocol number to raise ValueError") def test_long1(self): x = 12345678910111213141516178920L for proto in protocols: s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(x, y) self.assertEqual(opcode_in_pickle(pickle.LONG1, s), proto >= 2) def test_long4(self): x = 12345678910111213141516178920L << (256*8) for proto in protocols: s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(x, y) self.assertEqual(opcode_in_pickle(pickle.LONG4, s), proto >= 2) def test_short_tuples(self): # Map (proto, len(tuple)) to expected opcode. expected_opcode = {(0, 0): pickle.TUPLE, (0, 1): pickle.TUPLE, (0, 2): pickle.TUPLE, (0, 3): pickle.TUPLE, (0, 4): pickle.TUPLE, (1, 0): pickle.EMPTY_TUPLE, (1, 1): pickle.TUPLE, (1, 2): pickle.TUPLE, (1, 3): pickle.TUPLE, (1, 4): pickle.TUPLE, (2, 0): pickle.EMPTY_TUPLE, (2, 1): pickle.TUPLE1, (2, 2): pickle.TUPLE2, (2, 3): pickle.TUPLE3, (2, 4): pickle.TUPLE, } a = () b = (1,) c = (1, 2) d = (1, 2, 3) e = (1, 2, 3, 4) for proto in protocols: for x in a, b, c, d, e: s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(x, y, (proto, x, s, y)) expected = expected_opcode[proto, len(x)] self.assertEqual(opcode_in_pickle(expected, s), True) def test_singletons(self): # Map (proto, singleton) to expected opcode. expected_opcode = {(0, None): pickle.NONE, (1, None): pickle.NONE, (2, None): pickle.NONE, (0, True): pickle.INT, (1, True): pickle.INT, (2, True): pickle.NEWTRUE, (0, False): pickle.INT, (1, False): pickle.INT, (2, False): pickle.NEWFALSE, } for proto in protocols: for x in None, False, True: s = self.dumps(x, proto) y = self.loads(s) self.assert_(x is y, (proto, x, s, y)) expected = expected_opcode[proto, x] self.assertEqual(opcode_in_pickle(expected, s), True) def test_newobj_tuple(self): x = MyTuple([1, 2, 3]) x.foo = 42 x.bar = "hello" for proto in protocols: s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(tuple(x), tuple(y)) self.assertEqual(x.__dict__, y.__dict__) def test_newobj_list(self): x = MyList([1, 2, 3]) x.foo = 42 x.bar = "hello" for proto in protocols: s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(list(x), list(y)) self.assertEqual(x.__dict__, y.__dict__) def test_newobj_generic(self): for proto in protocols: for C in myclasses: B = C.__base__ x = C(C.sample) x.foo = 42 s = self.dumps(x, proto) y = self.loads(s) detail = (proto, C, B, x, y, type(y)) self.assertEqual(B(x), B(y), detail) self.assertEqual(x.__dict__, y.__dict__, detail) # Register a type with copy_reg, with extension code extcode. Pickle # an object of that type. Check that the resulting pickle uses opcode # (EXT[124]) under proto 2, and not in proto 1. def produce_global_ext(self, extcode, opcode): e = ExtensionSaver(extcode) try: copy_reg.add_extension(__name__, "MyList", extcode) x = MyList([1, 2, 3]) x.foo = 42 x.bar = "hello" # Dump using protocol 1 for comparison. s1 = self.dumps(x, 1) self.assert_(__name__ in s1) self.assert_("MyList" in s1) self.assertEqual(opcode_in_pickle(opcode, s1), False) y = self.loads(s1) self.assertEqual(list(x), list(y)) self.assertEqual(x.__dict__, y.__dict__) # Dump using protocol 2 for test. s2 = self.dumps(x, 2) self.assert_(__name__ not in s2) self.assert_("MyList" not in s2) self.assertEqual(opcode_in_pickle(opcode, s2), True) y = self.loads(s2) self.assertEqual(list(x), list(y)) self.assertEqual(x.__dict__, y.__dict__) finally: e.restore() def test_global_ext1(self): self.produce_global_ext(0x00000001, pickle.EXT1) # smallest EXT1 code self.produce_global_ext(0x000000ff, pickle.EXT1) # largest EXT1 code def test_global_ext2(self): self.produce_global_ext(0x00000100, pickle.EXT2) # smallest EXT2 code self.produce_global_ext(0x0000ffff, pickle.EXT2) # largest EXT2 code self.produce_global_ext(0x0000abcd, pickle.EXT2) # check endianness def test_global_ext4(self): self.produce_global_ext(0x00010000, pickle.EXT4) # smallest EXT4 code self.produce_global_ext(0x7fffffff, pickle.EXT4) # largest EXT4 code self.produce_global_ext(0x12abcdef, pickle.EXT4) # check endianness def test_list_chunking(self): n = 10 # too small to chunk x = range(n) for proto in protocols: s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(x, y) num_appends = count_opcode(pickle.APPENDS, s) self.assertEqual(num_appends, proto > 0) n = 2500 # expect at least two chunks when proto > 0 x = range(n) for proto in protocols: s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(x, y) num_appends = count_opcode(pickle.APPENDS, s) if proto == 0: self.assertEqual(num_appends, 0) else: self.failUnless(num_appends >= 2) def test_dict_chunking(self): n = 10 # too small to chunk x = dict.fromkeys(range(n)) for proto in protocols: s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(x, y) num_setitems = count_opcode(pickle.SETITEMS, s) self.assertEqual(num_setitems, proto > 0) n = 2500 # expect at least two chunks when proto > 0 x = dict.fromkeys(range(n)) for proto in protocols: s = self.dumps(x, proto) y = self.loads(s) self.assertEqual(x, y) num_setitems = count_opcode(pickle.SETITEMS, s) if proto == 0: self.assertEqual(num_setitems, 0) else: self.failUnless(num_setitems >= 2) def test_simple_newobj(self): x = object.__new__(SimpleNewObj) # avoid __init__ x.abc = 666 for proto in protocols: s = self.dumps(x, proto) self.assertEqual(opcode_in_pickle(pickle.NEWOBJ, s), proto >= 2) y = self.loads(s) # will raise TypeError if __init__ called self.assertEqual(y.abc, 666) self.assertEqual(x.__dict__, y.__dict__) def test_newobj_list_slots(self): x = SlotList([1, 2, 3]) x.foo = 42 x.bar = "hello" s = self.dumps(x, 2) y = self.loads(s) self.assertEqual(list(x), list(y)) self.assertEqual(x.__dict__, y.__dict__) self.assertEqual(x.foo, y.foo) self.assertEqual(x.bar, y.bar) def test_reduce_overrides_default_reduce_ex(self): for proto in 0, 1, 2: x = REX_one() self.assertEqual(x._reduce_called, 0) s = self.dumps(x, proto) self.assertEqual(x._reduce_called, 1) y = self.loads(s) self.assertEqual(y._reduce_called, 0) def test_reduce_ex_called(self): for proto in 0, 1, 2: x = REX_two() self.assertEqual(x._proto, None) s = self.dumps(x, proto) self.assertEqual(x._proto, proto) y = self.loads(s) self.assertEqual(y._proto, None) def test_reduce_ex_overrides_reduce(self): for proto in 0, 1, 2: x = REX_three() self.assertEqual(x._proto, None) s = self.dumps(x, proto) self.assertEqual(x._proto, proto) y = self.loads(s) self.assertEqual(y._proto, None) # Test classes for reduce_ex class REX_one(object): _reduce_called = 0 def __reduce__(self): self._reduce_called = 1 return REX_one, () # No __reduce_ex__ here, but inheriting it from object class REX_two(object): _proto = None def __reduce_ex__(self, proto): self._proto = proto return REX_two, () # No __reduce__ here, but inheriting it from object class REX_three(object): _proto = None def __reduce_ex__(self, proto): self._proto = proto return REX_two, () def __reduce__(self): raise TestFailed, "This __reduce__ shouldn't be called" # Test classes for newobj class MyInt(int): sample = 1 class MyLong(long): sample = 1L class MyFloat(float): sample = 1.0 class MyComplex(complex): sample = 1.0 + 0.0j class MyStr(str): sample = "hello" class MyUnicode(unicode): sample = u"hello \u1234" class MyTuple(tuple): sample = (1, 2, 3) class MyList(list): sample = [1, 2, 3] class MyDict(dict): sample = {"a": 1, "b": 2} myclasses = [MyInt, MyLong, MyFloat, MyComplex, MyStr, MyUnicode, MyTuple, MyList, MyDict] class SlotList(MyList): __slots__ = ["foo"] class SimpleNewObj(object): def __init__(self, a, b, c): # raise an error, to make sure this isn't called raise TypeError("SimpleNewObj.__init__() didn't expect to get called") class AbstractPickleModuleTests(unittest.TestCase): def test_dump_closed_file(self): import os f = open(TESTFN, "w") try: f.close() self.assertRaises(ValueError, self.module.dump, 123, f) finally: os.remove(TESTFN) def test_load_closed_file(self): import os f = open(TESTFN, "w") try: f.close() self.assertRaises(ValueError, self.module.dump, 123, f) finally: os.remove(TESTFN) def test_highest_protocol(self): # Of course this needs to be changed when HIGHEST_PROTOCOL changes. self.assertEqual(self.module.HIGHEST_PROTOCOL, 2) class AbstractPersistentPicklerTests(unittest.TestCase): # This class defines persistent_id() and persistent_load() # functions that should be used by the pickler. All even integers # are pickled using persistent ids. def persistent_id(self, object): if isinstance(object, int) and object % 2 == 0: self.id_count += 1 return str(object) else: return None def persistent_load(self, oid): self.load_count += 1 object = int(oid) assert object % 2 == 0 return object def test_persistence(self): self.id_count = 0 self.load_count = 0 L = range(10) self.assertEqual(self.loads(self.dumps(L)), L) self.assertEqual(self.id_count, 5) self.assertEqual(self.load_count, 5) def test_bin_persistence(self): self.id_count = 0 self.load_count = 0 L = range(10) self.assertEqual(self.loads(self.dumps(L, 1)), L) self.assertEqual(self.id_count, 5) self.assertEqual(self.load_count, 5)