| import builtins |
| import sys |
| import types |
| import math |
| import unittest |
| |
| from copy import deepcopy |
| from test import support |
| |
| |
| class OperatorsTest(unittest.TestCase): |
| |
| def __init__(self, *args, **kwargs): |
| unittest.TestCase.__init__(self, *args, **kwargs) |
| self.binops = { |
| 'add': '+', |
| 'sub': '-', |
| 'mul': '*', |
| 'div': '/', |
| 'divmod': 'divmod', |
| 'pow': '**', |
| 'lshift': '<<', |
| 'rshift': '>>', |
| 'and': '&', |
| 'xor': '^', |
| 'or': '|', |
| 'cmp': 'cmp', |
| 'lt': '<', |
| 'le': '<=', |
| 'eq': '==', |
| 'ne': '!=', |
| 'gt': '>', |
| 'ge': '>=', |
| } |
| |
| for name, expr in list(self.binops.items()): |
| if expr.islower(): |
| expr = expr + "(a, b)" |
| else: |
| expr = 'a %s b' % expr |
| self.binops[name] = expr |
| |
| self.unops = { |
| 'pos': '+', |
| 'neg': '-', |
| 'abs': 'abs', |
| 'invert': '~', |
| 'int': 'int', |
| 'float': 'float', |
| 'oct': 'oct', |
| 'hex': 'hex', |
| } |
| |
| for name, expr in list(self.unops.items()): |
| if expr.islower(): |
| expr = expr + "(a)" |
| else: |
| expr = '%s a' % expr |
| self.unops[name] = expr |
| |
| def unop_test(self, a, res, expr="len(a)", meth="__len__"): |
| d = {'a': a} |
| self.assertEqual(eval(expr, d), res) |
| t = type(a) |
| m = getattr(t, meth) |
| |
| # Find method in parent class |
| while meth not in t.__dict__: |
| t = t.__bases__[0] |
| # in some implementations (e.g. PyPy), 'm' can be a regular unbound |
| # method object; the getattr() below obtains its underlying function. |
| self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth]) |
| self.assertEqual(m(a), res) |
| bm = getattr(a, meth) |
| self.assertEqual(bm(), res) |
| |
| def binop_test(self, a, b, res, expr="a+b", meth="__add__"): |
| d = {'a': a, 'b': b} |
| |
| # XXX Hack so this passes before 2.3 when -Qnew is specified. |
| if meth == "__div__" and 1/2 == 0.5: |
| meth = "__truediv__" |
| |
| if meth == '__divmod__': pass |
| |
| self.assertEqual(eval(expr, d), res) |
| t = type(a) |
| m = getattr(t, meth) |
| while meth not in t.__dict__: |
| t = t.__bases__[0] |
| # in some implementations (e.g. PyPy), 'm' can be a regular unbound |
| # method object; the getattr() below obtains its underlying function. |
| self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth]) |
| self.assertEqual(m(a, b), res) |
| bm = getattr(a, meth) |
| self.assertEqual(bm(b), res) |
| |
| def sliceop_test(self, a, b, c, res, expr="a[b:c]", meth="__getitem__"): |
| d = {'a': a, 'b': b, 'c': c} |
| self.assertEqual(eval(expr, d), res) |
| t = type(a) |
| m = getattr(t, meth) |
| while meth not in t.__dict__: |
| t = t.__bases__[0] |
| # in some implementations (e.g. PyPy), 'm' can be a regular unbound |
| # method object; the getattr() below obtains its underlying function. |
| self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth]) |
| self.assertEqual(m(a, slice(b, c)), res) |
| bm = getattr(a, meth) |
| self.assertEqual(bm(slice(b, c)), res) |
| |
| def setop_test(self, a, b, res, stmt="a+=b", meth="__iadd__"): |
| d = {'a': deepcopy(a), 'b': b} |
| exec(stmt, d) |
| self.assertEqual(d['a'], res) |
| t = type(a) |
| m = getattr(t, meth) |
| while meth not in t.__dict__: |
| t = t.__bases__[0] |
| # in some implementations (e.g. PyPy), 'm' can be a regular unbound |
| # method object; the getattr() below obtains its underlying function. |
| self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth]) |
| d['a'] = deepcopy(a) |
| m(d['a'], b) |
| self.assertEqual(d['a'], res) |
| d['a'] = deepcopy(a) |
| bm = getattr(d['a'], meth) |
| bm(b) |
| self.assertEqual(d['a'], res) |
| |
| def set2op_test(self, a, b, c, res, stmt="a[b]=c", meth="__setitem__"): |
| d = {'a': deepcopy(a), 'b': b, 'c': c} |
| exec(stmt, d) |
| self.assertEqual(d['a'], res) |
| t = type(a) |
| m = getattr(t, meth) |
| while meth not in t.__dict__: |
| t = t.__bases__[0] |
| # in some implementations (e.g. PyPy), 'm' can be a regular unbound |
| # method object; the getattr() below obtains its underlying function. |
| self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth]) |
| d['a'] = deepcopy(a) |
| m(d['a'], b, c) |
| self.assertEqual(d['a'], res) |
| d['a'] = deepcopy(a) |
| bm = getattr(d['a'], meth) |
| bm(b, c) |
| self.assertEqual(d['a'], res) |
| |
| def setsliceop_test(self, a, b, c, d, res, stmt="a[b:c]=d", meth="__setitem__"): |
| dictionary = {'a': deepcopy(a), 'b': b, 'c': c, 'd': d} |
| exec(stmt, dictionary) |
| self.assertEqual(dictionary['a'], res) |
| t = type(a) |
| while meth not in t.__dict__: |
| t = t.__bases__[0] |
| m = getattr(t, meth) |
| # in some implementations (e.g. PyPy), 'm' can be a regular unbound |
| # method object; the getattr() below obtains its underlying function. |
| self.assertEqual(getattr(m, 'im_func', m), t.__dict__[meth]) |
| dictionary['a'] = deepcopy(a) |
| m(dictionary['a'], slice(b, c), d) |
| self.assertEqual(dictionary['a'], res) |
| dictionary['a'] = deepcopy(a) |
| bm = getattr(dictionary['a'], meth) |
| bm(slice(b, c), d) |
| self.assertEqual(dictionary['a'], res) |
| |
| def test_lists(self): |
| # Testing list operations... |
| # Asserts are within individual test methods |
| self.binop_test([1], [2], [1,2], "a+b", "__add__") |
| self.binop_test([1,2,3], 2, 1, "b in a", "__contains__") |
| self.binop_test([1,2,3], 4, 0, "b in a", "__contains__") |
| self.binop_test([1,2,3], 1, 2, "a[b]", "__getitem__") |
| self.sliceop_test([1,2,3], 0, 2, [1,2], "a[b:c]", "__getitem__") |
| self.setop_test([1], [2], [1,2], "a+=b", "__iadd__") |
| self.setop_test([1,2], 3, [1,2,1,2,1,2], "a*=b", "__imul__") |
| self.unop_test([1,2,3], 3, "len(a)", "__len__") |
| self.binop_test([1,2], 3, [1,2,1,2,1,2], "a*b", "__mul__") |
| self.binop_test([1,2], 3, [1,2,1,2,1,2], "b*a", "__rmul__") |
| self.set2op_test([1,2], 1, 3, [1,3], "a[b]=c", "__setitem__") |
| self.setsliceop_test([1,2,3,4], 1, 3, [5,6], [1,5,6,4], "a[b:c]=d", |
| "__setitem__") |
| |
| def test_dicts(self): |
| # Testing dict operations... |
| self.binop_test({1:2,3:4}, 1, 1, "b in a", "__contains__") |
| self.binop_test({1:2,3:4}, 2, 0, "b in a", "__contains__") |
| self.binop_test({1:2,3:4}, 1, 2, "a[b]", "__getitem__") |
| |
| d = {1:2, 3:4} |
| l1 = [] |
| for i in list(d.keys()): |
| l1.append(i) |
| l = [] |
| for i in iter(d): |
| l.append(i) |
| self.assertEqual(l, l1) |
| l = [] |
| for i in d.__iter__(): |
| l.append(i) |
| self.assertEqual(l, l1) |
| l = [] |
| for i in dict.__iter__(d): |
| l.append(i) |
| self.assertEqual(l, l1) |
| d = {1:2, 3:4} |
| self.unop_test(d, 2, "len(a)", "__len__") |
| self.assertEqual(eval(repr(d), {}), d) |
| self.assertEqual(eval(d.__repr__(), {}), d) |
| self.set2op_test({1:2,3:4}, 2, 3, {1:2,2:3,3:4}, "a[b]=c", |
| "__setitem__") |
| |
| # Tests for unary and binary operators |
| def number_operators(self, a, b, skip=[]): |
| dict = {'a': a, 'b': b} |
| |
| for name, expr in list(self.binops.items()): |
| if name not in skip: |
| name = "__%s__" % name |
| if hasattr(a, name): |
| res = eval(expr, dict) |
| self.binop_test(a, b, res, expr, name) |
| |
| for name, expr in list(self.unops.items()): |
| if name not in skip: |
| name = "__%s__" % name |
| if hasattr(a, name): |
| res = eval(expr, dict) |
| self.unop_test(a, res, expr, name) |
| |
| def test_ints(self): |
| # Testing int operations... |
| self.number_operators(100, 3) |
| # The following crashes in Python 2.2 |
| self.assertEqual((1).__bool__(), 1) |
| self.assertEqual((0).__bool__(), 0) |
| # This returns 'NotImplemented' in Python 2.2 |
| class C(int): |
| def __add__(self, other): |
| return NotImplemented |
| self.assertEqual(C(5), 5) |
| try: |
| C() + "" |
| except TypeError: |
| pass |
| else: |
| self.fail("NotImplemented should have caused TypeError") |
| |
| def test_floats(self): |
| # Testing float operations... |
| self.number_operators(100.0, 3.0) |
| |
| def test_complexes(self): |
| # Testing complex operations... |
| self.number_operators(100.0j, 3.0j, skip=['lt', 'le', 'gt', 'ge', |
| 'int', 'float', |
| 'divmod', 'mod']) |
| |
| class Number(complex): |
| __slots__ = ['prec'] |
| def __new__(cls, *args, **kwds): |
| result = complex.__new__(cls, *args) |
| result.prec = kwds.get('prec', 12) |
| return result |
| def __repr__(self): |
| prec = self.prec |
| if self.imag == 0.0: |
| return "%.*g" % (prec, self.real) |
| if self.real == 0.0: |
| return "%.*gj" % (prec, self.imag) |
| return "(%.*g+%.*gj)" % (prec, self.real, prec, self.imag) |
| __str__ = __repr__ |
| |
| a = Number(3.14, prec=6) |
| self.assertEqual(repr(a), "3.14") |
| self.assertEqual(a.prec, 6) |
| |
| a = Number(a, prec=2) |
| self.assertEqual(repr(a), "3.1") |
| self.assertEqual(a.prec, 2) |
| |
| a = Number(234.5) |
| self.assertEqual(repr(a), "234.5") |
| self.assertEqual(a.prec, 12) |
| |
| def test_explicit_reverse_methods(self): |
| # see issue 9930 |
| self.assertEqual(complex.__radd__(3j, 4.0), complex(4.0, 3.0)) |
| self.assertEqual(float.__rsub__(3.0, 1), -2.0) |
| |
| @support.impl_detail("the module 'xxsubtype' is internal") |
| def test_spam_lists(self): |
| # Testing spamlist operations... |
| import copy, xxsubtype as spam |
| |
| def spamlist(l, memo=None): |
| import xxsubtype as spam |
| return spam.spamlist(l) |
| |
| # This is an ugly hack: |
| copy._deepcopy_dispatch[spam.spamlist] = spamlist |
| |
| self.binop_test(spamlist([1]), spamlist([2]), spamlist([1,2]), "a+b", |
| "__add__") |
| self.binop_test(spamlist([1,2,3]), 2, 1, "b in a", "__contains__") |
| self.binop_test(spamlist([1,2,3]), 4, 0, "b in a", "__contains__") |
| self.binop_test(spamlist([1,2,3]), 1, 2, "a[b]", "__getitem__") |
| self.sliceop_test(spamlist([1,2,3]), 0, 2, spamlist([1,2]), "a[b:c]", |
| "__getitem__") |
| self.setop_test(spamlist([1]), spamlist([2]), spamlist([1,2]), "a+=b", |
| "__iadd__") |
| self.setop_test(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "a*=b", |
| "__imul__") |
| self.unop_test(spamlist([1,2,3]), 3, "len(a)", "__len__") |
| self.binop_test(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "a*b", |
| "__mul__") |
| self.binop_test(spamlist([1,2]), 3, spamlist([1,2,1,2,1,2]), "b*a", |
| "__rmul__") |
| self.set2op_test(spamlist([1,2]), 1, 3, spamlist([1,3]), "a[b]=c", |
| "__setitem__") |
| self.setsliceop_test(spamlist([1,2,3,4]), 1, 3, spamlist([5,6]), |
| spamlist([1,5,6,4]), "a[b:c]=d", "__setitem__") |
| # Test subclassing |
| class C(spam.spamlist): |
| def foo(self): return 1 |
| a = C() |
| self.assertEqual(a, []) |
| self.assertEqual(a.foo(), 1) |
| a.append(100) |
| self.assertEqual(a, [100]) |
| self.assertEqual(a.getstate(), 0) |
| a.setstate(42) |
| self.assertEqual(a.getstate(), 42) |
| |
| @support.impl_detail("the module 'xxsubtype' is internal") |
| def test_spam_dicts(self): |
| # Testing spamdict operations... |
| import copy, xxsubtype as spam |
| def spamdict(d, memo=None): |
| import xxsubtype as spam |
| sd = spam.spamdict() |
| for k, v in list(d.items()): |
| sd[k] = v |
| return sd |
| # This is an ugly hack: |
| copy._deepcopy_dispatch[spam.spamdict] = spamdict |
| |
| self.binop_test(spamdict({1:2,3:4}), 1, 1, "b in a", "__contains__") |
| self.binop_test(spamdict({1:2,3:4}), 2, 0, "b in a", "__contains__") |
| self.binop_test(spamdict({1:2,3:4}), 1, 2, "a[b]", "__getitem__") |
| d = spamdict({1:2,3:4}) |
| l1 = [] |
| for i in list(d.keys()): |
| l1.append(i) |
| l = [] |
| for i in iter(d): |
| l.append(i) |
| self.assertEqual(l, l1) |
| l = [] |
| for i in d.__iter__(): |
| l.append(i) |
| self.assertEqual(l, l1) |
| l = [] |
| for i in type(spamdict({})).__iter__(d): |
| l.append(i) |
| self.assertEqual(l, l1) |
| straightd = {1:2, 3:4} |
| spamd = spamdict(straightd) |
| self.unop_test(spamd, 2, "len(a)", "__len__") |
| self.unop_test(spamd, repr(straightd), "repr(a)", "__repr__") |
| self.set2op_test(spamdict({1:2,3:4}), 2, 3, spamdict({1:2,2:3,3:4}), |
| "a[b]=c", "__setitem__") |
| # Test subclassing |
| class C(spam.spamdict): |
| def foo(self): return 1 |
| a = C() |
| self.assertEqual(list(a.items()), []) |
| self.assertEqual(a.foo(), 1) |
| a['foo'] = 'bar' |
| self.assertEqual(list(a.items()), [('foo', 'bar')]) |
| self.assertEqual(a.getstate(), 0) |
| a.setstate(100) |
| self.assertEqual(a.getstate(), 100) |
| |
| class ClassPropertiesAndMethods(unittest.TestCase): |
| |
| def test_python_dicts(self): |
| # Testing Python subclass of dict... |
| self.assertTrue(issubclass(dict, dict)) |
| self.assertIsInstance({}, dict) |
| d = dict() |
| self.assertEqual(d, {}) |
| self.assertTrue(d.__class__ is dict) |
| self.assertIsInstance(d, dict) |
| class C(dict): |
| state = -1 |
| def __init__(self_local, *a, **kw): |
| if a: |
| self.assertEqual(len(a), 1) |
| self_local.state = a[0] |
| if kw: |
| for k, v in list(kw.items()): |
| self_local[v] = k |
| def __getitem__(self, key): |
| return self.get(key, 0) |
| def __setitem__(self_local, key, value): |
| self.assertIsInstance(key, type(0)) |
| dict.__setitem__(self_local, key, value) |
| def setstate(self, state): |
| self.state = state |
| def getstate(self): |
| return self.state |
| self.assertTrue(issubclass(C, dict)) |
| a1 = C(12) |
| self.assertEqual(a1.state, 12) |
| a2 = C(foo=1, bar=2) |
| self.assertEqual(a2[1] == 'foo' and a2[2], 'bar') |
| a = C() |
| self.assertEqual(a.state, -1) |
| self.assertEqual(a.getstate(), -1) |
| a.setstate(0) |
| self.assertEqual(a.state, 0) |
| self.assertEqual(a.getstate(), 0) |
| a.setstate(10) |
| self.assertEqual(a.state, 10) |
| self.assertEqual(a.getstate(), 10) |
| self.assertEqual(a[42], 0) |
| a[42] = 24 |
| self.assertEqual(a[42], 24) |
| N = 50 |
| for i in range(N): |
| a[i] = C() |
| for j in range(N): |
| a[i][j] = i*j |
| for i in range(N): |
| for j in range(N): |
| self.assertEqual(a[i][j], i*j) |
| |
| def test_python_lists(self): |
| # Testing Python subclass of list... |
| class C(list): |
| def __getitem__(self, i): |
| if isinstance(i, slice): |
| return i.start, i.stop |
| return list.__getitem__(self, i) + 100 |
| a = C() |
| a.extend([0,1,2]) |
| self.assertEqual(a[0], 100) |
| self.assertEqual(a[1], 101) |
| self.assertEqual(a[2], 102) |
| self.assertEqual(a[100:200], (100,200)) |
| |
| def test_metaclass(self): |
| # Testing metaclasses... |
| class C(metaclass=type): |
| def __init__(self): |
| self.__state = 0 |
| def getstate(self): |
| return self.__state |
| def setstate(self, state): |
| self.__state = state |
| a = C() |
| self.assertEqual(a.getstate(), 0) |
| a.setstate(10) |
| self.assertEqual(a.getstate(), 10) |
| class _metaclass(type): |
| def myself(cls): return cls |
| class D(metaclass=_metaclass): |
| pass |
| self.assertEqual(D.myself(), D) |
| d = D() |
| self.assertEqual(d.__class__, D) |
| class M1(type): |
| def __new__(cls, name, bases, dict): |
| dict['__spam__'] = 1 |
| return type.__new__(cls, name, bases, dict) |
| class C(metaclass=M1): |
| pass |
| self.assertEqual(C.__spam__, 1) |
| c = C() |
| self.assertEqual(c.__spam__, 1) |
| |
| class _instance(object): |
| pass |
| class M2(object): |
| @staticmethod |
| def __new__(cls, name, bases, dict): |
| self = object.__new__(cls) |
| self.name = name |
| self.bases = bases |
| self.dict = dict |
| return self |
| def __call__(self): |
| it = _instance() |
| # Early binding of methods |
| for key in self.dict: |
| if key.startswith("__"): |
| continue |
| setattr(it, key, self.dict[key].__get__(it, self)) |
| return it |
| class C(metaclass=M2): |
| def spam(self): |
| return 42 |
| self.assertEqual(C.name, 'C') |
| self.assertEqual(C.bases, ()) |
| self.assertIn('spam', C.dict) |
| c = C() |
| self.assertEqual(c.spam(), 42) |
| |
| # More metaclass examples |
| |
| class autosuper(type): |
| # Automatically add __super to the class |
| # This trick only works for dynamic classes |
| def __new__(metaclass, name, bases, dict): |
| cls = super(autosuper, metaclass).__new__(metaclass, |
| name, bases, dict) |
| # Name mangling for __super removes leading underscores |
| while name[:1] == "_": |
| name = name[1:] |
| if name: |
| name = "_%s__super" % name |
| else: |
| name = "__super" |
| setattr(cls, name, super(cls)) |
| return cls |
| class A(metaclass=autosuper): |
| def meth(self): |
| return "A" |
| class B(A): |
| def meth(self): |
| return "B" + self.__super.meth() |
| class C(A): |
| def meth(self): |
| return "C" + self.__super.meth() |
| class D(C, B): |
| def meth(self): |
| return "D" + self.__super.meth() |
| self.assertEqual(D().meth(), "DCBA") |
| class E(B, C): |
| def meth(self): |
| return "E" + self.__super.meth() |
| self.assertEqual(E().meth(), "EBCA") |
| |
| class autoproperty(type): |
| # Automatically create property attributes when methods |
| # named _get_x and/or _set_x are found |
| def __new__(metaclass, name, bases, dict): |
| hits = {} |
| for key, val in dict.items(): |
| if key.startswith("_get_"): |
| key = key[5:] |
| get, set = hits.get(key, (None, None)) |
| get = val |
| hits[key] = get, set |
| elif key.startswith("_set_"): |
| key = key[5:] |
| get, set = hits.get(key, (None, None)) |
| set = val |
| hits[key] = get, set |
| for key, (get, set) in hits.items(): |
| dict[key] = property(get, set) |
| return super(autoproperty, metaclass).__new__(metaclass, |
| name, bases, dict) |
| class A(metaclass=autoproperty): |
| def _get_x(self): |
| return -self.__x |
| def _set_x(self, x): |
| self.__x = -x |
| a = A() |
| self.assertTrue(not hasattr(a, "x")) |
| a.x = 12 |
| self.assertEqual(a.x, 12) |
| self.assertEqual(a._A__x, -12) |
| |
| class multimetaclass(autoproperty, autosuper): |
| # Merge of multiple cooperating metaclasses |
| pass |
| class A(metaclass=multimetaclass): |
| def _get_x(self): |
| return "A" |
| class B(A): |
| def _get_x(self): |
| return "B" + self.__super._get_x() |
| class C(A): |
| def _get_x(self): |
| return "C" + self.__super._get_x() |
| class D(C, B): |
| def _get_x(self): |
| return "D" + self.__super._get_x() |
| self.assertEqual(D().x, "DCBA") |
| |
| # Make sure type(x) doesn't call x.__class__.__init__ |
| class T(type): |
| counter = 0 |
| def __init__(self, *args): |
| T.counter += 1 |
| class C(metaclass=T): |
| pass |
| self.assertEqual(T.counter, 1) |
| a = C() |
| self.assertEqual(type(a), C) |
| self.assertEqual(T.counter, 1) |
| |
| class C(object): pass |
| c = C() |
| try: c() |
| except TypeError: pass |
| else: self.fail("calling object w/o call method should raise " |
| "TypeError") |
| |
| # Testing code to find most derived baseclass |
| class A(type): |
| def __new__(*args, **kwargs): |
| return type.__new__(*args, **kwargs) |
| |
| class B(object): |
| pass |
| |
| class C(object, metaclass=A): |
| pass |
| |
| # The most derived metaclass of D is A rather than type. |
| class D(B, C): |
| pass |
| |
| def test_module_subclasses(self): |
| # Testing Python subclass of module... |
| log = [] |
| MT = type(sys) |
| class MM(MT): |
| def __init__(self, name): |
| MT.__init__(self, name) |
| def __getattribute__(self, name): |
| log.append(("getattr", name)) |
| return MT.__getattribute__(self, name) |
| def __setattr__(self, name, value): |
| log.append(("setattr", name, value)) |
| MT.__setattr__(self, name, value) |
| def __delattr__(self, name): |
| log.append(("delattr", name)) |
| MT.__delattr__(self, name) |
| a = MM("a") |
| a.foo = 12 |
| x = a.foo |
| del a.foo |
| self.assertEqual(log, [("setattr", "foo", 12), |
| ("getattr", "foo"), |
| ("delattr", "foo")]) |
| |
| # http://python.org/sf/1174712 |
| try: |
| class Module(types.ModuleType, str): |
| pass |
| except TypeError: |
| pass |
| else: |
| self.fail("inheriting from ModuleType and str at the same time " |
| "should fail") |
| |
| def test_multiple_inheritance(self): |
| # Testing multiple inheritance... |
| class C(object): |
| def __init__(self): |
| self.__state = 0 |
| def getstate(self): |
| return self.__state |
| def setstate(self, state): |
| self.__state = state |
| a = C() |
| self.assertEqual(a.getstate(), 0) |
| a.setstate(10) |
| self.assertEqual(a.getstate(), 10) |
| class D(dict, C): |
| def __init__(self): |
| type({}).__init__(self) |
| C.__init__(self) |
| d = D() |
| self.assertEqual(list(d.keys()), []) |
| d["hello"] = "world" |
| self.assertEqual(list(d.items()), [("hello", "world")]) |
| self.assertEqual(d["hello"], "world") |
| self.assertEqual(d.getstate(), 0) |
| d.setstate(10) |
| self.assertEqual(d.getstate(), 10) |
| self.assertEqual(D.__mro__, (D, dict, C, object)) |
| |
| # SF bug #442833 |
| class Node(object): |
| def __int__(self): |
| return int(self.foo()) |
| def foo(self): |
| return "23" |
| class Frag(Node, list): |
| def foo(self): |
| return "42" |
| self.assertEqual(Node().__int__(), 23) |
| self.assertEqual(int(Node()), 23) |
| self.assertEqual(Frag().__int__(), 42) |
| self.assertEqual(int(Frag()), 42) |
| |
| def test_diamond_inheritence(self): |
| # Testing multiple inheritance special cases... |
| class A(object): |
| def spam(self): return "A" |
| self.assertEqual(A().spam(), "A") |
| class B(A): |
| def boo(self): return "B" |
| def spam(self): return "B" |
| self.assertEqual(B().spam(), "B") |
| self.assertEqual(B().boo(), "B") |
| class C(A): |
| def boo(self): return "C" |
| self.assertEqual(C().spam(), "A") |
| self.assertEqual(C().boo(), "C") |
| class D(B, C): pass |
| self.assertEqual(D().spam(), "B") |
| self.assertEqual(D().boo(), "B") |
| self.assertEqual(D.__mro__, (D, B, C, A, object)) |
| class E(C, B): pass |
| self.assertEqual(E().spam(), "B") |
| self.assertEqual(E().boo(), "C") |
| self.assertEqual(E.__mro__, (E, C, B, A, object)) |
| # MRO order disagreement |
| try: |
| class F(D, E): pass |
| except TypeError: |
| pass |
| else: |
| self.fail("expected MRO order disagreement (F)") |
| try: |
| class G(E, D): pass |
| except TypeError: |
| pass |
| else: |
| self.fail("expected MRO order disagreement (G)") |
| |
| # see thread python-dev/2002-October/029035.html |
| def test_ex5_from_c3_switch(self): |
| # Testing ex5 from C3 switch discussion... |
| class A(object): pass |
| class B(object): pass |
| class C(object): pass |
| class X(A): pass |
| class Y(A): pass |
| class Z(X,B,Y,C): pass |
| self.assertEqual(Z.__mro__, (Z, X, B, Y, A, C, object)) |
| |
| # see "A Monotonic Superclass Linearization for Dylan", |
| # by Kim Barrett et al. (OOPSLA 1996) |
| def test_monotonicity(self): |
| # Testing MRO monotonicity... |
| class Boat(object): pass |
| class DayBoat(Boat): pass |
| class WheelBoat(Boat): pass |
| class EngineLess(DayBoat): pass |
| class SmallMultihull(DayBoat): pass |
| class PedalWheelBoat(EngineLess,WheelBoat): pass |
| class SmallCatamaran(SmallMultihull): pass |
| class Pedalo(PedalWheelBoat,SmallCatamaran): pass |
| |
| self.assertEqual(PedalWheelBoat.__mro__, |
| (PedalWheelBoat, EngineLess, DayBoat, WheelBoat, Boat, object)) |
| self.assertEqual(SmallCatamaran.__mro__, |
| (SmallCatamaran, SmallMultihull, DayBoat, Boat, object)) |
| self.assertEqual(Pedalo.__mro__, |
| (Pedalo, PedalWheelBoat, EngineLess, SmallCatamaran, |
| SmallMultihull, DayBoat, WheelBoat, Boat, object)) |
| |
| # see "A Monotonic Superclass Linearization for Dylan", |
| # by Kim Barrett et al. (OOPSLA 1996) |
| def test_consistency_with_epg(self): |
| # Testing consistency with EPG... |
| class Pane(object): pass |
| class ScrollingMixin(object): pass |
| class EditingMixin(object): pass |
| class ScrollablePane(Pane,ScrollingMixin): pass |
| class EditablePane(Pane,EditingMixin): pass |
| class EditableScrollablePane(ScrollablePane,EditablePane): pass |
| |
| self.assertEqual(EditableScrollablePane.__mro__, |
| (EditableScrollablePane, ScrollablePane, EditablePane, Pane, |
| ScrollingMixin, EditingMixin, object)) |
| |
| def test_mro_disagreement(self): |
| # Testing error messages for MRO disagreement... |
| mro_err_msg = """Cannot create a consistent method resolution |
| order (MRO) for bases """ |
| |
| def raises(exc, expected, callable, *args): |
| try: |
| callable(*args) |
| except exc as msg: |
| # the exact msg is generally considered an impl detail |
| if support.check_impl_detail(): |
| if not str(msg).startswith(expected): |
| self.fail("Message %r, expected %r" % |
| (str(msg), expected)) |
| else: |
| self.fail("Expected %s" % exc) |
| |
| class A(object): pass |
| class B(A): pass |
| class C(object): pass |
| |
| # Test some very simple errors |
| raises(TypeError, "duplicate base class A", |
| type, "X", (A, A), {}) |
| raises(TypeError, mro_err_msg, |
| type, "X", (A, B), {}) |
| raises(TypeError, mro_err_msg, |
| type, "X", (A, C, B), {}) |
| # Test a slightly more complex error |
| class GridLayout(object): pass |
| class HorizontalGrid(GridLayout): pass |
| class VerticalGrid(GridLayout): pass |
| class HVGrid(HorizontalGrid, VerticalGrid): pass |
| class VHGrid(VerticalGrid, HorizontalGrid): pass |
| raises(TypeError, mro_err_msg, |
| type, "ConfusedGrid", (HVGrid, VHGrid), {}) |
| |
| def test_object_class(self): |
| # Testing object class... |
| a = object() |
| self.assertEqual(a.__class__, object) |
| self.assertEqual(type(a), object) |
| b = object() |
| self.assertNotEqual(a, b) |
| self.assertFalse(hasattr(a, "foo")) |
| try: |
| a.foo = 12 |
| except (AttributeError, TypeError): |
| pass |
| else: |
| self.fail("object() should not allow setting a foo attribute") |
| self.assertFalse(hasattr(object(), "__dict__")) |
| |
| class Cdict(object): |
| pass |
| x = Cdict() |
| self.assertEqual(x.__dict__, {}) |
| x.foo = 1 |
| self.assertEqual(x.foo, 1) |
| self.assertEqual(x.__dict__, {'foo': 1}) |
| |
| def test_slots(self): |
| # Testing __slots__... |
| class C0(object): |
| __slots__ = [] |
| x = C0() |
| self.assertFalse(hasattr(x, "__dict__")) |
| self.assertFalse(hasattr(x, "foo")) |
| |
| class C1(object): |
| __slots__ = ['a'] |
| x = C1() |
| self.assertFalse(hasattr(x, "__dict__")) |
| self.assertFalse(hasattr(x, "a")) |
| x.a = 1 |
| self.assertEqual(x.a, 1) |
| x.a = None |
| self.assertEqual(x.a, None) |
| del x.a |
| self.assertFalse(hasattr(x, "a")) |
| |
| class C3(object): |
| __slots__ = ['a', 'b', 'c'] |
| x = C3() |
| self.assertFalse(hasattr(x, "__dict__")) |
| self.assertFalse(hasattr(x, 'a')) |
| self.assertFalse(hasattr(x, 'b')) |
| self.assertFalse(hasattr(x, 'c')) |
| x.a = 1 |
| x.b = 2 |
| x.c = 3 |
| self.assertEqual(x.a, 1) |
| self.assertEqual(x.b, 2) |
| self.assertEqual(x.c, 3) |
| |
| class C4(object): |
| """Validate name mangling""" |
| __slots__ = ['__a'] |
| def __init__(self, value): |
| self.__a = value |
| def get(self): |
| return self.__a |
| x = C4(5) |
| self.assertFalse(hasattr(x, '__dict__')) |
| self.assertFalse(hasattr(x, '__a')) |
| self.assertEqual(x.get(), 5) |
| try: |
| x.__a = 6 |
| except AttributeError: |
| pass |
| else: |
| self.fail("Double underscored names not mangled") |
| |
| # Make sure slot names are proper identifiers |
| try: |
| class C(object): |
| __slots__ = [None] |
| except TypeError: |
| pass |
| else: |
| self.fail("[None] slots not caught") |
| try: |
| class C(object): |
| __slots__ = ["foo bar"] |
| except TypeError: |
| pass |
| else: |
| self.fail("['foo bar'] slots not caught") |
| try: |
| class C(object): |
| __slots__ = ["foo\0bar"] |
| except TypeError: |
| pass |
| else: |
| self.fail("['foo\\0bar'] slots not caught") |
| try: |
| class C(object): |
| __slots__ = ["1"] |
| except TypeError: |
| pass |
| else: |
| self.fail("['1'] slots not caught") |
| try: |
| class C(object): |
| __slots__ = [""] |
| except TypeError: |
| pass |
| else: |
| self.fail("[''] slots not caught") |
| class C(object): |
| __slots__ = ["a", "a_b", "_a", "A0123456789Z"] |
| # XXX(nnorwitz): was there supposed to be something tested |
| # from the class above? |
| |
| # Test a single string is not expanded as a sequence. |
| class C(object): |
| __slots__ = "abc" |
| c = C() |
| c.abc = 5 |
| self.assertEqual(c.abc, 5) |
| |
| # Test unicode slot names |
| # Test a single unicode string is not expanded as a sequence. |
| class C(object): |
| __slots__ = "abc" |
| c = C() |
| c.abc = 5 |
| self.assertEqual(c.abc, 5) |
| |
| # _unicode_to_string used to modify slots in certain circumstances |
| slots = ("foo", "bar") |
| class C(object): |
| __slots__ = slots |
| x = C() |
| x.foo = 5 |
| self.assertEqual(x.foo, 5) |
| self.assertTrue(type(slots[0]) is str) |
| # this used to leak references |
| try: |
| class C(object): |
| __slots__ = [chr(128)] |
| except (TypeError, UnicodeEncodeError): |
| pass |
| else: |
| raise TestFailed("[chr(128)] slots not caught") |
| |
| # Test leaks |
| class Counted(object): |
| counter = 0 # counts the number of instances alive |
| def __init__(self): |
| Counted.counter += 1 |
| def __del__(self): |
| Counted.counter -= 1 |
| class C(object): |
| __slots__ = ['a', 'b', 'c'] |
| x = C() |
| x.a = Counted() |
| x.b = Counted() |
| x.c = Counted() |
| self.assertEqual(Counted.counter, 3) |
| del x |
| support.gc_collect() |
| self.assertEqual(Counted.counter, 0) |
| class D(C): |
| pass |
| x = D() |
| x.a = Counted() |
| x.z = Counted() |
| self.assertEqual(Counted.counter, 2) |
| del x |
| support.gc_collect() |
| self.assertEqual(Counted.counter, 0) |
| class E(D): |
| __slots__ = ['e'] |
| x = E() |
| x.a = Counted() |
| x.z = Counted() |
| x.e = Counted() |
| self.assertEqual(Counted.counter, 3) |
| del x |
| support.gc_collect() |
| self.assertEqual(Counted.counter, 0) |
| |
| # Test cyclical leaks [SF bug 519621] |
| class F(object): |
| __slots__ = ['a', 'b'] |
| s = F() |
| s.a = [Counted(), s] |
| self.assertEqual(Counted.counter, 1) |
| s = None |
| support.gc_collect() |
| self.assertEqual(Counted.counter, 0) |
| |
| # Test lookup leaks [SF bug 572567] |
| import gc |
| if hasattr(gc, 'get_objects'): |
| class G(object): |
| def __eq__(self, other): |
| return False |
| g = G() |
| orig_objects = len(gc.get_objects()) |
| for i in range(10): |
| g==g |
| new_objects = len(gc.get_objects()) |
| self.assertEqual(orig_objects, new_objects) |
| |
| class H(object): |
| __slots__ = ['a', 'b'] |
| def __init__(self): |
| self.a = 1 |
| self.b = 2 |
| def __del__(self_): |
| self.assertEqual(self_.a, 1) |
| self.assertEqual(self_.b, 2) |
| with support.captured_output('stderr') as s: |
| h = H() |
| del h |
| self.assertEqual(s.getvalue(), '') |
| |
| class X(object): |
| __slots__ = "a" |
| with self.assertRaises(AttributeError): |
| del X().a |
| |
| def test_slots_special(self): |
| # Testing __dict__ and __weakref__ in __slots__... |
| class D(object): |
| __slots__ = ["__dict__"] |
| a = D() |
| self.assertTrue(hasattr(a, "__dict__")) |
| self.assertFalse(hasattr(a, "__weakref__")) |
| a.foo = 42 |
| self.assertEqual(a.__dict__, {"foo": 42}) |
| |
| class W(object): |
| __slots__ = ["__weakref__"] |
| a = W() |
| self.assertTrue(hasattr(a, "__weakref__")) |
| self.assertFalse(hasattr(a, "__dict__")) |
| try: |
| a.foo = 42 |
| except AttributeError: |
| pass |
| else: |
| self.fail("shouldn't be allowed to set a.foo") |
| |
| class C1(W, D): |
| __slots__ = [] |
| a = C1() |
| self.assertTrue(hasattr(a, "__dict__")) |
| self.assertTrue(hasattr(a, "__weakref__")) |
| a.foo = 42 |
| self.assertEqual(a.__dict__, {"foo": 42}) |
| |
| class C2(D, W): |
| __slots__ = [] |
| a = C2() |
| self.assertTrue(hasattr(a, "__dict__")) |
| self.assertTrue(hasattr(a, "__weakref__")) |
| a.foo = 42 |
| self.assertEqual(a.__dict__, {"foo": 42}) |
| |
| def test_slots_descriptor(self): |
| # Issue2115: slot descriptors did not correctly check |
| # the type of the given object |
| import abc |
| class MyABC(metaclass=abc.ABCMeta): |
| __slots__ = "a" |
| |
| class Unrelated(object): |
| pass |
| MyABC.register(Unrelated) |
| |
| u = Unrelated() |
| self.assertIsInstance(u, MyABC) |
| |
| # This used to crash |
| self.assertRaises(TypeError, MyABC.a.__set__, u, 3) |
| |
| def test_dynamics(self): |
| # Testing class attribute propagation... |
| class D(object): |
| pass |
| class E(D): |
| pass |
| class F(D): |
| pass |
| D.foo = 1 |
| self.assertEqual(D.foo, 1) |
| # Test that dynamic attributes are inherited |
| self.assertEqual(E.foo, 1) |
| self.assertEqual(F.foo, 1) |
| # Test dynamic instances |
| class C(object): |
| pass |
| a = C() |
| self.assertFalse(hasattr(a, "foobar")) |
| C.foobar = 2 |
| self.assertEqual(a.foobar, 2) |
| C.method = lambda self: 42 |
| self.assertEqual(a.method(), 42) |
| C.__repr__ = lambda self: "C()" |
| self.assertEqual(repr(a), "C()") |
| C.__int__ = lambda self: 100 |
| self.assertEqual(int(a), 100) |
| self.assertEqual(a.foobar, 2) |
| self.assertFalse(hasattr(a, "spam")) |
| def mygetattr(self, name): |
| if name == "spam": |
| return "spam" |
| raise AttributeError |
| C.__getattr__ = mygetattr |
| self.assertEqual(a.spam, "spam") |
| a.new = 12 |
| self.assertEqual(a.new, 12) |
| def mysetattr(self, name, value): |
| if name == "spam": |
| raise AttributeError |
| return object.__setattr__(self, name, value) |
| C.__setattr__ = mysetattr |
| try: |
| a.spam = "not spam" |
| except AttributeError: |
| pass |
| else: |
| self.fail("expected AttributeError") |
| self.assertEqual(a.spam, "spam") |
| class D(C): |
| pass |
| d = D() |
| d.foo = 1 |
| self.assertEqual(d.foo, 1) |
| |
| # Test handling of int*seq and seq*int |
| class I(int): |
| pass |
| self.assertEqual("a"*I(2), "aa") |
| self.assertEqual(I(2)*"a", "aa") |
| self.assertEqual(2*I(3), 6) |
| self.assertEqual(I(3)*2, 6) |
| self.assertEqual(I(3)*I(2), 6) |
| |
| # Test comparison of classes with dynamic metaclasses |
| class dynamicmetaclass(type): |
| pass |
| class someclass(metaclass=dynamicmetaclass): |
| pass |
| self.assertNotEqual(someclass, object) |
| |
| def test_errors(self): |
| # Testing errors... |
| try: |
| class C(list, dict): |
| pass |
| except TypeError: |
| pass |
| else: |
| self.fail("inheritance from both list and dict should be illegal") |
| |
| try: |
| class C(object, None): |
| pass |
| except TypeError: |
| pass |
| else: |
| self.fail("inheritance from non-type should be illegal") |
| class Classic: |
| pass |
| |
| try: |
| class C(type(len)): |
| pass |
| except TypeError: |
| pass |
| else: |
| self.fail("inheritance from CFunction should be illegal") |
| |
| try: |
| class C(object): |
| __slots__ = 1 |
| except TypeError: |
| pass |
| else: |
| self.fail("__slots__ = 1 should be illegal") |
| |
| try: |
| class C(object): |
| __slots__ = [1] |
| except TypeError: |
| pass |
| else: |
| self.fail("__slots__ = [1] should be illegal") |
| |
| class M1(type): |
| pass |
| class M2(type): |
| pass |
| class A1(object, metaclass=M1): |
| pass |
| class A2(object, metaclass=M2): |
| pass |
| try: |
| class B(A1, A2): |
| pass |
| except TypeError: |
| pass |
| else: |
| self.fail("finding the most derived metaclass should have failed") |
| |
| def test_classmethods(self): |
| # Testing class methods... |
| class C(object): |
| def foo(*a): return a |
| goo = classmethod(foo) |
| c = C() |
| self.assertEqual(C.goo(1), (C, 1)) |
| self.assertEqual(c.goo(1), (C, 1)) |
| self.assertEqual(c.foo(1), (c, 1)) |
| class D(C): |
| pass |
| d = D() |
| self.assertEqual(D.goo(1), (D, 1)) |
| self.assertEqual(d.goo(1), (D, 1)) |
| self.assertEqual(d.foo(1), (d, 1)) |
| self.assertEqual(D.foo(d, 1), (d, 1)) |
| # Test for a specific crash (SF bug 528132) |
| def f(cls, arg): return (cls, arg) |
| ff = classmethod(f) |
| self.assertEqual(ff.__get__(0, int)(42), (int, 42)) |
| self.assertEqual(ff.__get__(0)(42), (int, 42)) |
| |
| # Test super() with classmethods (SF bug 535444) |
| self.assertEqual(C.goo.__self__, C) |
| self.assertEqual(D.goo.__self__, D) |
| self.assertEqual(super(D,D).goo.__self__, D) |
| self.assertEqual(super(D,d).goo.__self__, D) |
| self.assertEqual(super(D,D).goo(), (D,)) |
| self.assertEqual(super(D,d).goo(), (D,)) |
| |
| # Verify that a non-callable will raise |
| meth = classmethod(1).__get__(1) |
| self.assertRaises(TypeError, meth) |
| |
| # Verify that classmethod() doesn't allow keyword args |
| try: |
| classmethod(f, kw=1) |
| except TypeError: |
| pass |
| else: |
| self.fail("classmethod shouldn't accept keyword args") |
| |
| @support.impl_detail("the module 'xxsubtype' is internal") |
| def test_classmethods_in_c(self): |
| # Testing C-based class methods... |
| import xxsubtype as spam |
| a = (1, 2, 3) |
| d = {'abc': 123} |
| x, a1, d1 = spam.spamlist.classmeth(*a, **d) |
| self.assertEqual(x, spam.spamlist) |
| self.assertEqual(a, a1) |
| self.assertEqual(d, d1) |
| x, a1, d1 = spam.spamlist().classmeth(*a, **d) |
| self.assertEqual(x, spam.spamlist) |
| self.assertEqual(a, a1) |
| self.assertEqual(d, d1) |
| |
| def test_staticmethods(self): |
| # Testing static methods... |
| class C(object): |
| def foo(*a): return a |
| goo = staticmethod(foo) |
| c = C() |
| self.assertEqual(C.goo(1), (1,)) |
| self.assertEqual(c.goo(1), (1,)) |
| self.assertEqual(c.foo(1), (c, 1,)) |
| class D(C): |
| pass |
| d = D() |
| self.assertEqual(D.goo(1), (1,)) |
| self.assertEqual(d.goo(1), (1,)) |
| self.assertEqual(d.foo(1), (d, 1)) |
| self.assertEqual(D.foo(d, 1), (d, 1)) |
| |
| @support.impl_detail("the module 'xxsubtype' is internal") |
| def test_staticmethods_in_c(self): |
| # Testing C-based static methods... |
| import xxsubtype as spam |
| a = (1, 2, 3) |
| d = {"abc": 123} |
| x, a1, d1 = spam.spamlist.staticmeth(*a, **d) |
| self.assertEqual(x, None) |
| self.assertEqual(a, a1) |
| self.assertEqual(d, d1) |
| x, a1, d2 = spam.spamlist().staticmeth(*a, **d) |
| self.assertEqual(x, None) |
| self.assertEqual(a, a1) |
| self.assertEqual(d, d1) |
| |
| def test_classic(self): |
| # Testing classic classes... |
| class C: |
| def foo(*a): return a |
| goo = classmethod(foo) |
| c = C() |
| self.assertEqual(C.goo(1), (C, 1)) |
| self.assertEqual(c.goo(1), (C, 1)) |
| self.assertEqual(c.foo(1), (c, 1)) |
| class D(C): |
| pass |
| d = D() |
| self.assertEqual(D.goo(1), (D, 1)) |
| self.assertEqual(d.goo(1), (D, 1)) |
| self.assertEqual(d.foo(1), (d, 1)) |
| self.assertEqual(D.foo(d, 1), (d, 1)) |
| class E: # *not* subclassing from C |
| foo = C.foo |
| self.assertEqual(E().foo.__func__, C.foo) # i.e., unbound |
| self.assertTrue(repr(C.foo.__get__(C())).startswith("<bound method ")) |
| |
| def test_compattr(self): |
| # Testing computed attributes... |
| class C(object): |
| class computed_attribute(object): |
| def __init__(self, get, set=None, delete=None): |
| self.__get = get |
| self.__set = set |
| self.__delete = delete |
| def __get__(self, obj, type=None): |
| return self.__get(obj) |
| def __set__(self, obj, value): |
| return self.__set(obj, value) |
| def __delete__(self, obj): |
| return self.__delete(obj) |
| def __init__(self): |
| self.__x = 0 |
| def __get_x(self): |
| x = self.__x |
| self.__x = x+1 |
| return x |
| def __set_x(self, x): |
| self.__x = x |
| def __delete_x(self): |
| del self.__x |
| x = computed_attribute(__get_x, __set_x, __delete_x) |
| a = C() |
| self.assertEqual(a.x, 0) |
| self.assertEqual(a.x, 1) |
| a.x = 10 |
| self.assertEqual(a.x, 10) |
| self.assertEqual(a.x, 11) |
| del a.x |
| self.assertEqual(hasattr(a, 'x'), 0) |
| |
| def test_newslots(self): |
| # Testing __new__ slot override... |
| class C(list): |
| def __new__(cls): |
| self = list.__new__(cls) |
| self.foo = 1 |
| return self |
| def __init__(self): |
| self.foo = self.foo + 2 |
| a = C() |
| self.assertEqual(a.foo, 3) |
| self.assertEqual(a.__class__, C) |
| class D(C): |
| pass |
| b = D() |
| self.assertEqual(b.foo, 3) |
| self.assertEqual(b.__class__, D) |
| |
| def test_altmro(self): |
| # Testing mro() and overriding it... |
| class A(object): |
| def f(self): return "A" |
| class B(A): |
| pass |
| class C(A): |
| def f(self): return "C" |
| class D(B, C): |
| pass |
| self.assertEqual(D.mro(), [D, B, C, A, object]) |
| self.assertEqual(D.__mro__, (D, B, C, A, object)) |
| self.assertEqual(D().f(), "C") |
| |
| class PerverseMetaType(type): |
| def mro(cls): |
| L = type.mro(cls) |
| L.reverse() |
| return L |
| class X(D,B,C,A, metaclass=PerverseMetaType): |
| pass |
| self.assertEqual(X.__mro__, (object, A, C, B, D, X)) |
| self.assertEqual(X().f(), "A") |
| |
| try: |
| class _metaclass(type): |
| def mro(self): |
| return [self, dict, object] |
| class X(object, metaclass=_metaclass): |
| pass |
| # In CPython, the class creation above already raises |
| # TypeError, as a protection against the fact that |
| # instances of X would segfault it. In other Python |
| # implementations it would be ok to let the class X |
| # be created, but instead get a clean TypeError on the |
| # __setitem__ below. |
| x = object.__new__(X) |
| x[5] = 6 |
| except TypeError: |
| pass |
| else: |
| self.fail("devious mro() return not caught") |
| |
| try: |
| class _metaclass(type): |
| def mro(self): |
| return [1] |
| class X(object, metaclass=_metaclass): |
| pass |
| except TypeError: |
| pass |
| else: |
| self.fail("non-class mro() return not caught") |
| |
| try: |
| class _metaclass(type): |
| def mro(self): |
| return 1 |
| class X(object, metaclass=_metaclass): |
| pass |
| except TypeError: |
| pass |
| else: |
| self.fail("non-sequence mro() return not caught") |
| |
| def test_overloading(self): |
| # Testing operator overloading... |
| |
| class B(object): |
| "Intermediate class because object doesn't have a __setattr__" |
| |
| class C(B): |
| def __getattr__(self, name): |
| if name == "foo": |
| return ("getattr", name) |
| else: |
| raise AttributeError |
| def __setattr__(self, name, value): |
| if name == "foo": |
| self.setattr = (name, value) |
| else: |
| return B.__setattr__(self, name, value) |
| def __delattr__(self, name): |
| if name == "foo": |
| self.delattr = name |
| else: |
| return B.__delattr__(self, name) |
| |
| def __getitem__(self, key): |
| return ("getitem", key) |
| def __setitem__(self, key, value): |
| self.setitem = (key, value) |
| def __delitem__(self, key): |
| self.delitem = key |
| |
| a = C() |
| self.assertEqual(a.foo, ("getattr", "foo")) |
| a.foo = 12 |
| self.assertEqual(a.setattr, ("foo", 12)) |
| del a.foo |
| self.assertEqual(a.delattr, "foo") |
| |
| self.assertEqual(a[12], ("getitem", 12)) |
| a[12] = 21 |
| self.assertEqual(a.setitem, (12, 21)) |
| del a[12] |
| self.assertEqual(a.delitem, 12) |
| |
| self.assertEqual(a[0:10], ("getitem", slice(0, 10))) |
| a[0:10] = "foo" |
| self.assertEqual(a.setitem, (slice(0, 10), "foo")) |
| del a[0:10] |
| self.assertEqual(a.delitem, (slice(0, 10))) |
| |
| def test_methods(self): |
| # Testing methods... |
| class C(object): |
| def __init__(self, x): |
| self.x = x |
| def foo(self): |
| return self.x |
| c1 = C(1) |
| self.assertEqual(c1.foo(), 1) |
| class D(C): |
| boo = C.foo |
| goo = c1.foo |
| d2 = D(2) |
| self.assertEqual(d2.foo(), 2) |
| self.assertEqual(d2.boo(), 2) |
| self.assertEqual(d2.goo(), 1) |
| class E(object): |
| foo = C.foo |
| self.assertEqual(E().foo.__func__, C.foo) # i.e., unbound |
| self.assertTrue(repr(C.foo.__get__(C(1))).startswith("<bound method ")) |
| |
| def test_special_method_lookup(self): |
| # The lookup of special methods bypasses __getattr__ and |
| # __getattribute__, but they still can be descriptors. |
| |
| def run_context(manager): |
| with manager: |
| pass |
| def iden(self): |
| return self |
| def hello(self): |
| return b"hello" |
| def empty_seq(self): |
| return [] |
| def zero(self): |
| return 0 |
| def complex_num(self): |
| return 1j |
| def stop(self): |
| raise StopIteration |
| def return_true(self, thing=None): |
| return True |
| def do_isinstance(obj): |
| return isinstance(int, obj) |
| def do_issubclass(obj): |
| return issubclass(int, obj) |
| def do_dict_missing(checker): |
| class DictSub(checker.__class__, dict): |
| pass |
| self.assertEqual(DictSub()["hi"], 4) |
| def some_number(self_, key): |
| self.assertEqual(key, "hi") |
| return 4 |
| def swallow(*args): pass |
| def format_impl(self, spec): |
| return "hello" |
| |
| # It would be nice to have every special method tested here, but I'm |
| # only listing the ones I can remember outside of typeobject.c, since it |
| # does it right. |
| specials = [ |
| ("__bytes__", bytes, hello, set(), {}), |
| ("__reversed__", reversed, empty_seq, set(), {}), |
| ("__length_hint__", list, zero, set(), |
| {"__iter__" : iden, "__next__" : stop}), |
| ("__sizeof__", sys.getsizeof, zero, set(), {}), |
| ("__instancecheck__", do_isinstance, return_true, set(), {}), |
| ("__missing__", do_dict_missing, some_number, |
| set(("__class__",)), {}), |
| ("__subclasscheck__", do_issubclass, return_true, |
| set(("__bases__",)), {}), |
| ("__enter__", run_context, iden, set(), {"__exit__" : swallow}), |
| ("__exit__", run_context, swallow, set(), {"__enter__" : iden}), |
| ("__complex__", complex, complex_num, set(), {}), |
| ("__format__", format, format_impl, set(), {}), |
| ("__floor__", math.floor, zero, set(), {}), |
| ("__trunc__", math.trunc, zero, set(), {}), |
| ("__ceil__", math.ceil, zero, set(), {}), |
| ("__dir__", dir, empty_seq, set(), {}), |
| ] |
| |
| class Checker(object): |
| def __getattr__(self, attr, test=self): |
| test.fail("__getattr__ called with {0}".format(attr)) |
| def __getattribute__(self, attr, test=self): |
| if attr not in ok: |
| test.fail("__getattribute__ called with {0}".format(attr)) |
| return object.__getattribute__(self, attr) |
| class SpecialDescr(object): |
| def __init__(self, impl): |
| self.impl = impl |
| def __get__(self, obj, owner): |
| record.append(1) |
| return self.impl.__get__(obj, owner) |
| class MyException(Exception): |
| pass |
| class ErrDescr(object): |
| def __get__(self, obj, owner): |
| raise MyException |
| |
| for name, runner, meth_impl, ok, env in specials: |
| class X(Checker): |
| pass |
| for attr, obj in env.items(): |
| setattr(X, attr, obj) |
| setattr(X, name, meth_impl) |
| runner(X()) |
| |
| record = [] |
| class X(Checker): |
| pass |
| for attr, obj in env.items(): |
| setattr(X, attr, obj) |
| setattr(X, name, SpecialDescr(meth_impl)) |
| runner(X()) |
| self.assertEqual(record, [1], name) |
| |
| class X(Checker): |
| pass |
| for attr, obj in env.items(): |
| setattr(X, attr, obj) |
| setattr(X, name, ErrDescr()) |
| try: |
| runner(X()) |
| except MyException: |
| pass |
| else: |
| self.fail("{0!r} didn't raise".format(name)) |
| |
| def test_specials(self): |
| # Testing special operators... |
| # Test operators like __hash__ for which a built-in default exists |
| |
| # Test the default behavior for static classes |
| class C(object): |
| def __getitem__(self, i): |
| if 0 <= i < 10: return i |
| raise IndexError |
| c1 = C() |
| c2 = C() |
| self.assertTrue(not not c1) # What? |
| self.assertNotEqual(id(c1), id(c2)) |
| hash(c1) |
| hash(c2) |
| self.assertEqual(c1, c1) |
| self.assertTrue(c1 != c2) |
| self.assertTrue(not c1 != c1) |
| self.assertTrue(not c1 == c2) |
| # Note that the module name appears in str/repr, and that varies |
| # depending on whether this test is run standalone or from a framework. |
| self.assertTrue(str(c1).find('C object at ') >= 0) |
| self.assertEqual(str(c1), repr(c1)) |
| self.assertNotIn(-1, c1) |
| for i in range(10): |
| self.assertIn(i, c1) |
| self.assertNotIn(10, c1) |
| # Test the default behavior for dynamic classes |
| class D(object): |
| def __getitem__(self, i): |
| if 0 <= i < 10: return i |
| raise IndexError |
| d1 = D() |
| d2 = D() |
| self.assertTrue(not not d1) |
| self.assertNotEqual(id(d1), id(d2)) |
| hash(d1) |
| hash(d2) |
| self.assertEqual(d1, d1) |
| self.assertNotEqual(d1, d2) |
| self.assertTrue(not d1 != d1) |
| self.assertTrue(not d1 == d2) |
| # Note that the module name appears in str/repr, and that varies |
| # depending on whether this test is run standalone or from a framework. |
| self.assertTrue(str(d1).find('D object at ') >= 0) |
| self.assertEqual(str(d1), repr(d1)) |
| self.assertNotIn(-1, d1) |
| for i in range(10): |
| self.assertIn(i, d1) |
| self.assertNotIn(10, d1) |
| # Test overridden behavior |
| class Proxy(object): |
| def __init__(self, x): |
| self.x = x |
| def __bool__(self): |
| return not not self.x |
| def __hash__(self): |
| return hash(self.x) |
| def __eq__(self, other): |
| return self.x == other |
| def __ne__(self, other): |
| return self.x != other |
| def __ge__(self, other): |
| return self.x >= other |
| def __gt__(self, other): |
| return self.x > other |
| def __le__(self, other): |
| return self.x <= other |
| def __lt__(self, other): |
| return self.x < other |
| def __str__(self): |
| return "Proxy:%s" % self.x |
| def __repr__(self): |
| return "Proxy(%r)" % self.x |
| def __contains__(self, value): |
| return value in self.x |
| p0 = Proxy(0) |
| p1 = Proxy(1) |
| p_1 = Proxy(-1) |
| self.assertFalse(p0) |
| self.assertTrue(not not p1) |
| self.assertEqual(hash(p0), hash(0)) |
| self.assertEqual(p0, p0) |
| self.assertNotEqual(p0, p1) |
| self.assertTrue(not p0 != p0) |
| self.assertEqual(not p0, p1) |
| self.assertTrue(p0 < p1) |
| self.assertTrue(p0 <= p1) |
| self.assertTrue(p1 > p0) |
| self.assertTrue(p1 >= p0) |
| self.assertEqual(str(p0), "Proxy:0") |
| self.assertEqual(repr(p0), "Proxy(0)") |
| p10 = Proxy(range(10)) |
| self.assertNotIn(-1, p10) |
| for i in range(10): |
| self.assertIn(i, p10) |
| self.assertNotIn(10, p10) |
| |
| def test_weakrefs(self): |
| # Testing weak references... |
| import weakref |
| class C(object): |
| pass |
| c = C() |
| r = weakref.ref(c) |
| self.assertEqual(r(), c) |
| del c |
| support.gc_collect() |
| self.assertEqual(r(), None) |
| del r |
| class NoWeak(object): |
| __slots__ = ['foo'] |
| no = NoWeak() |
| try: |
| weakref.ref(no) |
| except TypeError as msg: |
| self.assertTrue(str(msg).find("weak reference") >= 0) |
| else: |
| self.fail("weakref.ref(no) should be illegal") |
| class Weak(object): |
| __slots__ = ['foo', '__weakref__'] |
| yes = Weak() |
| r = weakref.ref(yes) |
| self.assertEqual(r(), yes) |
| del yes |
| support.gc_collect() |
| self.assertEqual(r(), None) |
| del r |
| |
| def test_properties(self): |
| # Testing property... |
| class C(object): |
| def getx(self): |
| return self.__x |
| def setx(self, value): |
| self.__x = value |
| def delx(self): |
| del self.__x |
| x = property(getx, setx, delx, doc="I'm the x property.") |
| a = C() |
| self.assertFalse(hasattr(a, "x")) |
| a.x = 42 |
| self.assertEqual(a._C__x, 42) |
| self.assertEqual(a.x, 42) |
| del a.x |
| self.assertFalse(hasattr(a, "x")) |
| self.assertFalse(hasattr(a, "_C__x")) |
| C.x.__set__(a, 100) |
| self.assertEqual(C.x.__get__(a), 100) |
| C.x.__delete__(a) |
| self.assertFalse(hasattr(a, "x")) |
| |
| raw = C.__dict__['x'] |
| self.assertIsInstance(raw, property) |
| |
| attrs = dir(raw) |
| self.assertIn("__doc__", attrs) |
| self.assertIn("fget", attrs) |
| self.assertIn("fset", attrs) |
| self.assertIn("fdel", attrs) |
| |
| self.assertEqual(raw.__doc__, "I'm the x property.") |
| self.assertTrue(raw.fget is C.__dict__['getx']) |
| self.assertTrue(raw.fset is C.__dict__['setx']) |
| self.assertTrue(raw.fdel is C.__dict__['delx']) |
| |
| for attr in "__doc__", "fget", "fset", "fdel": |
| try: |
| setattr(raw, attr, 42) |
| except AttributeError as msg: |
| if str(msg).find('readonly') < 0: |
| self.fail("when setting readonly attr %r on a property, " |
| "got unexpected AttributeError msg %r" % (attr, str(msg))) |
| else: |
| self.fail("expected AttributeError from trying to set readonly %r " |
| "attr on a property" % attr) |
| |
| class D(object): |
| __getitem__ = property(lambda s: 1/0) |
| |
| d = D() |
| try: |
| for i in d: |
| str(i) |
| except ZeroDivisionError: |
| pass |
| else: |
| self.fail("expected ZeroDivisionError from bad property") |
| |
| @unittest.skipIf(sys.flags.optimize >= 2, |
| "Docstrings are omitted with -O2 and above") |
| def test_properties_doc_attrib(self): |
| class E(object): |
| def getter(self): |
| "getter method" |
| return 0 |
| def setter(self_, value): |
| "setter method" |
| pass |
| prop = property(getter) |
| self.assertEqual(prop.__doc__, "getter method") |
| prop2 = property(fset=setter) |
| self.assertEqual(prop2.__doc__, None) |
| |
| def test_testcapi_no_segfault(self): |
| # this segfaulted in 2.5b2 |
| try: |
| import _testcapi |
| except ImportError: |
| pass |
| else: |
| class X(object): |
| p = property(_testcapi.test_with_docstring) |
| |
| def test_properties_plus(self): |
| class C(object): |
| foo = property(doc="hello") |
| @foo.getter |
| def foo(self): |
| return self._foo |
| @foo.setter |
| def foo(self, value): |
| self._foo = abs(value) |
| @foo.deleter |
| def foo(self): |
| del self._foo |
| c = C() |
| self.assertEqual(C.foo.__doc__, "hello") |
| self.assertFalse(hasattr(c, "foo")) |
| c.foo = -42 |
| self.assertTrue(hasattr(c, '_foo')) |
| self.assertEqual(c._foo, 42) |
| self.assertEqual(c.foo, 42) |
| del c.foo |
| self.assertFalse(hasattr(c, '_foo')) |
| self.assertFalse(hasattr(c, "foo")) |
| |
| class D(C): |
| @C.foo.deleter |
| def foo(self): |
| try: |
| del self._foo |
| except AttributeError: |
| pass |
| d = D() |
| d.foo = 24 |
| self.assertEqual(d.foo, 24) |
| del d.foo |
| del d.foo |
| |
| class E(object): |
| @property |
| def foo(self): |
| return self._foo |
| @foo.setter |
| def foo(self, value): |
| raise RuntimeError |
| @foo.setter |
| def foo(self, value): |
| self._foo = abs(value) |
| @foo.deleter |
| def foo(self, value=None): |
| del self._foo |
| |
| e = E() |
| e.foo = -42 |
| self.assertEqual(e.foo, 42) |
| del e.foo |
| |
| class F(E): |
| @E.foo.deleter |
| def foo(self): |
| del self._foo |
| @foo.setter |
| def foo(self, value): |
| self._foo = max(0, value) |
| f = F() |
| f.foo = -10 |
| self.assertEqual(f.foo, 0) |
| del f.foo |
| |
| def test_dict_constructors(self): |
| # Testing dict constructor ... |
| d = dict() |
| self.assertEqual(d, {}) |
| d = dict({}) |
| self.assertEqual(d, {}) |
| d = dict({1: 2, 'a': 'b'}) |
| self.assertEqual(d, {1: 2, 'a': 'b'}) |
| self.assertEqual(d, dict(list(d.items()))) |
| self.assertEqual(d, dict(iter(d.items()))) |
| d = dict({'one':1, 'two':2}) |
| self.assertEqual(d, dict(one=1, two=2)) |
| self.assertEqual(d, dict(**d)) |
| self.assertEqual(d, dict({"one": 1}, two=2)) |
| self.assertEqual(d, dict([("two", 2)], one=1)) |
| self.assertEqual(d, dict([("one", 100), ("two", 200)], **d)) |
| self.assertEqual(d, dict(**d)) |
| |
| for badarg in 0, 0, 0j, "0", [0], (0,): |
| try: |
| dict(badarg) |
| except TypeError: |
| pass |
| except ValueError: |
| if badarg == "0": |
| # It's a sequence, and its elements are also sequences (gotta |
| # love strings <wink>), but they aren't of length 2, so this |
| # one seemed better as a ValueError than a TypeError. |
| pass |
| else: |
| self.fail("no TypeError from dict(%r)" % badarg) |
| else: |
| self.fail("no TypeError from dict(%r)" % badarg) |
| |
| try: |
| dict({}, {}) |
| except TypeError: |
| pass |
| else: |
| self.fail("no TypeError from dict({}, {})") |
| |
| class Mapping: |
| # Lacks a .keys() method; will be added later. |
| dict = {1:2, 3:4, 'a':1j} |
| |
| try: |
| dict(Mapping()) |
| except TypeError: |
| pass |
| else: |
| self.fail("no TypeError from dict(incomplete mapping)") |
| |
| Mapping.keys = lambda self: list(self.dict.keys()) |
| Mapping.__getitem__ = lambda self, i: self.dict[i] |
| d = dict(Mapping()) |
| self.assertEqual(d, Mapping.dict) |
| |
| # Init from sequence of iterable objects, each producing a 2-sequence. |
| class AddressBookEntry: |
| def __init__(self, first, last): |
| self.first = first |
| self.last = last |
| def __iter__(self): |
| return iter([self.first, self.last]) |
| |
| d = dict([AddressBookEntry('Tim', 'Warsaw'), |
| AddressBookEntry('Barry', 'Peters'), |
| AddressBookEntry('Tim', 'Peters'), |
| AddressBookEntry('Barry', 'Warsaw')]) |
| self.assertEqual(d, {'Barry': 'Warsaw', 'Tim': 'Peters'}) |
| |
| d = dict(zip(range(4), range(1, 5))) |
| self.assertEqual(d, dict([(i, i+1) for i in range(4)])) |
| |
| # Bad sequence lengths. |
| for bad in [('tooshort',)], [('too', 'long', 'by 1')]: |
| try: |
| dict(bad) |
| except ValueError: |
| pass |
| else: |
| self.fail("no ValueError from dict(%r)" % bad) |
| |
| def test_dir(self): |
| # Testing dir() ... |
| junk = 12 |
| self.assertEqual(dir(), ['junk', 'self']) |
| del junk |
| |
| # Just make sure these don't blow up! |
| for arg in 2, 2, 2j, 2e0, [2], "2", b"2", (2,), {2:2}, type, self.test_dir: |
| dir(arg) |
| |
| # Test dir on new-style classes. Since these have object as a |
| # base class, a lot more gets sucked in. |
| def interesting(strings): |
| return [s for s in strings if not s.startswith('_')] |
| |
| class C(object): |
| Cdata = 1 |
| def Cmethod(self): pass |
| |
| cstuff = ['Cdata', 'Cmethod'] |
| self.assertEqual(interesting(dir(C)), cstuff) |
| |
| c = C() |
| self.assertEqual(interesting(dir(c)), cstuff) |
| ## self.assertIn('__self__', dir(C.Cmethod)) |
| |
| c.cdata = 2 |
| c.cmethod = lambda self: 0 |
| self.assertEqual(interesting(dir(c)), cstuff + ['cdata', 'cmethod']) |
| ## self.assertIn('__self__', dir(c.Cmethod)) |
| |
| class A(C): |
| Adata = 1 |
| def Amethod(self): pass |
| |
| astuff = ['Adata', 'Amethod'] + cstuff |
| self.assertEqual(interesting(dir(A)), astuff) |
| ## self.assertIn('__self__', dir(A.Amethod)) |
| a = A() |
| self.assertEqual(interesting(dir(a)), astuff) |
| a.adata = 42 |
| a.amethod = lambda self: 3 |
| self.assertEqual(interesting(dir(a)), astuff + ['adata', 'amethod']) |
| ## self.assertIn('__self__', dir(a.Amethod)) |
| |
| # Try a module subclass. |
| class M(type(sys)): |
| pass |
| minstance = M("m") |
| minstance.b = 2 |
| minstance.a = 1 |
| names = [x for x in dir(minstance) if x not in ["__name__", "__doc__"]] |
| self.assertEqual(names, ['a', 'b']) |
| |
| class M2(M): |
| def getdict(self): |
| return "Not a dict!" |
| __dict__ = property(getdict) |
| |
| m2instance = M2("m2") |
| m2instance.b = 2 |
| m2instance.a = 1 |
| self.assertEqual(m2instance.__dict__, "Not a dict!") |
| try: |
| dir(m2instance) |
| except TypeError: |
| pass |
| |
| # Two essentially featureless objects, just inheriting stuff from |
| # object. |
| self.assertEqual(dir(NotImplemented), dir(Ellipsis)) |
| if support.check_impl_detail(): |
| # None differs in PyPy: it has a __nonzero__ |
| self.assertEqual(dir(None), dir(Ellipsis)) |
| |
| # Nasty test case for proxied objects |
| class Wrapper(object): |
| def __init__(self, obj): |
| self.__obj = obj |
| def __repr__(self): |
| return "Wrapper(%s)" % repr(self.__obj) |
| def __getitem__(self, key): |
| return Wrapper(self.__obj[key]) |
| def __len__(self): |
| return len(self.__obj) |
| def __getattr__(self, name): |
| return Wrapper(getattr(self.__obj, name)) |
| |
| class C(object): |
| def __getclass(self): |
| return Wrapper(type(self)) |
| __class__ = property(__getclass) |
| |
| dir(C()) # This used to segfault |
| |
| def test_supers(self): |
| # Testing super... |
| |
| class A(object): |
| def meth(self, a): |
| return "A(%r)" % a |
| |
| self.assertEqual(A().meth(1), "A(1)") |
| |
| class B(A): |
| def __init__(self): |
| self.__super = super(B, self) |
| def meth(self, a): |
| return "B(%r)" % a + self.__super.meth(a) |
| |
| self.assertEqual(B().meth(2), "B(2)A(2)") |
| |
| class C(A): |
| def meth(self, a): |
| return "C(%r)" % a + self.__super.meth(a) |
| C._C__super = super(C) |
| |
| self.assertEqual(C().meth(3), "C(3)A(3)") |
| |
| class D(C, B): |
| def meth(self, a): |
| return "D(%r)" % a + super(D, self).meth(a) |
| |
| self.assertEqual(D().meth(4), "D(4)C(4)B(4)A(4)") |
| |
| # Test for subclassing super |
| |
| class mysuper(super): |
| def __init__(self, *args): |
| return super(mysuper, self).__init__(*args) |
| |
| class E(D): |
| def meth(self, a): |
| return "E(%r)" % a + mysuper(E, self).meth(a) |
| |
| self.assertEqual(E().meth(5), "E(5)D(5)C(5)B(5)A(5)") |
| |
| class F(E): |
| def meth(self, a): |
| s = self.__super # == mysuper(F, self) |
| return "F(%r)[%s]" % (a, s.__class__.__name__) + s.meth(a) |
| F._F__super = mysuper(F) |
| |
| self.assertEqual(F().meth(6), "F(6)[mysuper]E(6)D(6)C(6)B(6)A(6)") |
| |
| # Make sure certain errors are raised |
| |
| try: |
| super(D, 42) |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't allow super(D, 42)") |
| |
| try: |
| super(D, C()) |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't allow super(D, C())") |
| |
| try: |
| super(D).__get__(12) |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't allow super(D).__get__(12)") |
| |
| try: |
| super(D).__get__(C()) |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't allow super(D).__get__(C())") |
| |
| # Make sure data descriptors can be overridden and accessed via super |
| # (new feature in Python 2.3) |
| |
| class DDbase(object): |
| def getx(self): return 42 |
| x = property(getx) |
| |
| class DDsub(DDbase): |
| def getx(self): return "hello" |
| x = property(getx) |
| |
| dd = DDsub() |
| self.assertEqual(dd.x, "hello") |
| self.assertEqual(super(DDsub, dd).x, 42) |
| |
| # Ensure that super() lookup of descriptor from classmethod |
| # works (SF ID# 743627) |
| |
| class Base(object): |
| aProp = property(lambda self: "foo") |
| |
| class Sub(Base): |
| @classmethod |
| def test(klass): |
| return super(Sub,klass).aProp |
| |
| self.assertEqual(Sub.test(), Base.aProp) |
| |
| # Verify that super() doesn't allow keyword args |
| try: |
| super(Base, kw=1) |
| except TypeError: |
| pass |
| else: |
| self.assertEqual("super shouldn't accept keyword args") |
| |
| def test_basic_inheritance(self): |
| # Testing inheritance from basic types... |
| |
| class hexint(int): |
| def __repr__(self): |
| return hex(self) |
| def __add__(self, other): |
| return hexint(int.__add__(self, other)) |
| # (Note that overriding __radd__ doesn't work, |
| # because the int type gets first dibs.) |
| self.assertEqual(repr(hexint(7) + 9), "0x10") |
| self.assertEqual(repr(hexint(1000) + 7), "0x3ef") |
| a = hexint(12345) |
| self.assertEqual(a, 12345) |
| self.assertEqual(int(a), 12345) |
| self.assertTrue(int(a).__class__ is int) |
| self.assertEqual(hash(a), hash(12345)) |
| self.assertTrue((+a).__class__ is int) |
| self.assertTrue((a >> 0).__class__ is int) |
| self.assertTrue((a << 0).__class__ is int) |
| self.assertTrue((hexint(0) << 12).__class__ is int) |
| self.assertTrue((hexint(0) >> 12).__class__ is int) |
| |
| class octlong(int): |
| __slots__ = [] |
| def __str__(self): |
| return oct(self) |
| def __add__(self, other): |
| return self.__class__(super(octlong, self).__add__(other)) |
| __radd__ = __add__ |
| self.assertEqual(str(octlong(3) + 5), "0o10") |
| # (Note that overriding __radd__ here only seems to work |
| # because the example uses a short int left argument.) |
| self.assertEqual(str(5 + octlong(3000)), "0o5675") |
| a = octlong(12345) |
| self.assertEqual(a, 12345) |
| self.assertEqual(int(a), 12345) |
| self.assertEqual(hash(a), hash(12345)) |
| self.assertTrue(int(a).__class__ is int) |
| self.assertTrue((+a).__class__ is int) |
| self.assertTrue((-a).__class__ is int) |
| self.assertTrue((-octlong(0)).__class__ is int) |
| self.assertTrue((a >> 0).__class__ is int) |
| self.assertTrue((a << 0).__class__ is int) |
| self.assertTrue((a - 0).__class__ is int) |
| self.assertTrue((a * 1).__class__ is int) |
| self.assertTrue((a ** 1).__class__ is int) |
| self.assertTrue((a // 1).__class__ is int) |
| self.assertTrue((1 * a).__class__ is int) |
| self.assertTrue((a | 0).__class__ is int) |
| self.assertTrue((a ^ 0).__class__ is int) |
| self.assertTrue((a & -1).__class__ is int) |
| self.assertTrue((octlong(0) << 12).__class__ is int) |
| self.assertTrue((octlong(0) >> 12).__class__ is int) |
| self.assertTrue(abs(octlong(0)).__class__ is int) |
| |
| # Because octlong overrides __add__, we can't check the absence of +0 |
| # optimizations using octlong. |
| class longclone(int): |
| pass |
| a = longclone(1) |
| self.assertTrue((a + 0).__class__ is int) |
| self.assertTrue((0 + a).__class__ is int) |
| |
| # Check that negative clones don't segfault |
| a = longclone(-1) |
| self.assertEqual(a.__dict__, {}) |
| self.assertEqual(int(a), -1) # self.assertTrue PyNumber_Long() copies the sign bit |
| |
| class precfloat(float): |
| __slots__ = ['prec'] |
| def __init__(self, value=0.0, prec=12): |
| self.prec = int(prec) |
| def __repr__(self): |
| return "%.*g" % (self.prec, self) |
| self.assertEqual(repr(precfloat(1.1)), "1.1") |
| a = precfloat(12345) |
| self.assertEqual(a, 12345.0) |
| self.assertEqual(float(a), 12345.0) |
| self.assertTrue(float(a).__class__ is float) |
| self.assertEqual(hash(a), hash(12345.0)) |
| self.assertTrue((+a).__class__ is float) |
| |
| class madcomplex(complex): |
| def __repr__(self): |
| return "%.17gj%+.17g" % (self.imag, self.real) |
| a = madcomplex(-3, 4) |
| self.assertEqual(repr(a), "4j-3") |
| base = complex(-3, 4) |
| self.assertEqual(base.__class__, complex) |
| self.assertEqual(a, base) |
| self.assertEqual(complex(a), base) |
| self.assertEqual(complex(a).__class__, complex) |
| a = madcomplex(a) # just trying another form of the constructor |
| self.assertEqual(repr(a), "4j-3") |
| self.assertEqual(a, base) |
| self.assertEqual(complex(a), base) |
| self.assertEqual(complex(a).__class__, complex) |
| self.assertEqual(hash(a), hash(base)) |
| self.assertEqual((+a).__class__, complex) |
| self.assertEqual((a + 0).__class__, complex) |
| self.assertEqual(a + 0, base) |
| self.assertEqual((a - 0).__class__, complex) |
| self.assertEqual(a - 0, base) |
| self.assertEqual((a * 1).__class__, complex) |
| self.assertEqual(a * 1, base) |
| self.assertEqual((a / 1).__class__, complex) |
| self.assertEqual(a / 1, base) |
| |
| class madtuple(tuple): |
| _rev = None |
| def rev(self): |
| if self._rev is not None: |
| return self._rev |
| L = list(self) |
| L.reverse() |
| self._rev = self.__class__(L) |
| return self._rev |
| a = madtuple((1,2,3,4,5,6,7,8,9,0)) |
| self.assertEqual(a, (1,2,3,4,5,6,7,8,9,0)) |
| self.assertEqual(a.rev(), madtuple((0,9,8,7,6,5,4,3,2,1))) |
| self.assertEqual(a.rev().rev(), madtuple((1,2,3,4,5,6,7,8,9,0))) |
| for i in range(512): |
| t = madtuple(range(i)) |
| u = t.rev() |
| v = u.rev() |
| self.assertEqual(v, t) |
| a = madtuple((1,2,3,4,5)) |
| self.assertEqual(tuple(a), (1,2,3,4,5)) |
| self.assertTrue(tuple(a).__class__ is tuple) |
| self.assertEqual(hash(a), hash((1,2,3,4,5))) |
| self.assertTrue(a[:].__class__ is tuple) |
| self.assertTrue((a * 1).__class__ is tuple) |
| self.assertTrue((a * 0).__class__ is tuple) |
| self.assertTrue((a + ()).__class__ is tuple) |
| a = madtuple(()) |
| self.assertEqual(tuple(a), ()) |
| self.assertTrue(tuple(a).__class__ is tuple) |
| self.assertTrue((a + a).__class__ is tuple) |
| self.assertTrue((a * 0).__class__ is tuple) |
| self.assertTrue((a * 1).__class__ is tuple) |
| self.assertTrue((a * 2).__class__ is tuple) |
| self.assertTrue(a[:].__class__ is tuple) |
| |
| class madstring(str): |
| _rev = None |
| def rev(self): |
| if self._rev is not None: |
| return self._rev |
| L = list(self) |
| L.reverse() |
| self._rev = self.__class__("".join(L)) |
| return self._rev |
| s = madstring("abcdefghijklmnopqrstuvwxyz") |
| self.assertEqual(s, "abcdefghijklmnopqrstuvwxyz") |
| self.assertEqual(s.rev(), madstring("zyxwvutsrqponmlkjihgfedcba")) |
| self.assertEqual(s.rev().rev(), madstring("abcdefghijklmnopqrstuvwxyz")) |
| for i in range(256): |
| s = madstring("".join(map(chr, range(i)))) |
| t = s.rev() |
| u = t.rev() |
| self.assertEqual(u, s) |
| s = madstring("12345") |
| self.assertEqual(str(s), "12345") |
| self.assertTrue(str(s).__class__ is str) |
| |
| base = "\x00" * 5 |
| s = madstring(base) |
| self.assertEqual(s, base) |
| self.assertEqual(str(s), base) |
| self.assertTrue(str(s).__class__ is str) |
| self.assertEqual(hash(s), hash(base)) |
| self.assertEqual({s: 1}[base], 1) |
| self.assertEqual({base: 1}[s], 1) |
| self.assertTrue((s + "").__class__ is str) |
| self.assertEqual(s + "", base) |
| self.assertTrue(("" + s).__class__ is str) |
| self.assertEqual("" + s, base) |
| self.assertTrue((s * 0).__class__ is str) |
| self.assertEqual(s * 0, "") |
| self.assertTrue((s * 1).__class__ is str) |
| self.assertEqual(s * 1, base) |
| self.assertTrue((s * 2).__class__ is str) |
| self.assertEqual(s * 2, base + base) |
| self.assertTrue(s[:].__class__ is str) |
| self.assertEqual(s[:], base) |
| self.assertTrue(s[0:0].__class__ is str) |
| self.assertEqual(s[0:0], "") |
| self.assertTrue(s.strip().__class__ is str) |
| self.assertEqual(s.strip(), base) |
| self.assertTrue(s.lstrip().__class__ is str) |
| self.assertEqual(s.lstrip(), base) |
| self.assertTrue(s.rstrip().__class__ is str) |
| self.assertEqual(s.rstrip(), base) |
| identitytab = {} |
| self.assertTrue(s.translate(identitytab).__class__ is str) |
| self.assertEqual(s.translate(identitytab), base) |
| self.assertTrue(s.replace("x", "x").__class__ is str) |
| self.assertEqual(s.replace("x", "x"), base) |
| self.assertTrue(s.ljust(len(s)).__class__ is str) |
| self.assertEqual(s.ljust(len(s)), base) |
| self.assertTrue(s.rjust(len(s)).__class__ is str) |
| self.assertEqual(s.rjust(len(s)), base) |
| self.assertTrue(s.center(len(s)).__class__ is str) |
| self.assertEqual(s.center(len(s)), base) |
| self.assertTrue(s.lower().__class__ is str) |
| self.assertEqual(s.lower(), base) |
| |
| class madunicode(str): |
| _rev = None |
| def rev(self): |
| if self._rev is not None: |
| return self._rev |
| L = list(self) |
| L.reverse() |
| self._rev = self.__class__("".join(L)) |
| return self._rev |
| u = madunicode("ABCDEF") |
| self.assertEqual(u, "ABCDEF") |
| self.assertEqual(u.rev(), madunicode("FEDCBA")) |
| self.assertEqual(u.rev().rev(), madunicode("ABCDEF")) |
| base = "12345" |
| u = madunicode(base) |
| self.assertEqual(str(u), base) |
| self.assertTrue(str(u).__class__ is str) |
| self.assertEqual(hash(u), hash(base)) |
| self.assertEqual({u: 1}[base], 1) |
| self.assertEqual({base: 1}[u], 1) |
| self.assertTrue(u.strip().__class__ is str) |
| self.assertEqual(u.strip(), base) |
| self.assertTrue(u.lstrip().__class__ is str) |
| self.assertEqual(u.lstrip(), base) |
| self.assertTrue(u.rstrip().__class__ is str) |
| self.assertEqual(u.rstrip(), base) |
| self.assertTrue(u.replace("x", "x").__class__ is str) |
| self.assertEqual(u.replace("x", "x"), base) |
| self.assertTrue(u.replace("xy", "xy").__class__ is str) |
| self.assertEqual(u.replace("xy", "xy"), base) |
| self.assertTrue(u.center(len(u)).__class__ is str) |
| self.assertEqual(u.center(len(u)), base) |
| self.assertTrue(u.ljust(len(u)).__class__ is str) |
| self.assertEqual(u.ljust(len(u)), base) |
| self.assertTrue(u.rjust(len(u)).__class__ is str) |
| self.assertEqual(u.rjust(len(u)), base) |
| self.assertTrue(u.lower().__class__ is str) |
| self.assertEqual(u.lower(), base) |
| self.assertTrue(u.upper().__class__ is str) |
| self.assertEqual(u.upper(), base) |
| self.assertTrue(u.capitalize().__class__ is str) |
| self.assertEqual(u.capitalize(), base) |
| self.assertTrue(u.title().__class__ is str) |
| self.assertEqual(u.title(), base) |
| self.assertTrue((u + "").__class__ is str) |
| self.assertEqual(u + "", base) |
| self.assertTrue(("" + u).__class__ is str) |
| self.assertEqual("" + u, base) |
| self.assertTrue((u * 0).__class__ is str) |
| self.assertEqual(u * 0, "") |
| self.assertTrue((u * 1).__class__ is str) |
| self.assertEqual(u * 1, base) |
| self.assertTrue((u * 2).__class__ is str) |
| self.assertEqual(u * 2, base + base) |
| self.assertTrue(u[:].__class__ is str) |
| self.assertEqual(u[:], base) |
| self.assertTrue(u[0:0].__class__ is str) |
| self.assertEqual(u[0:0], "") |
| |
| class sublist(list): |
| pass |
| a = sublist(range(5)) |
| self.assertEqual(a, list(range(5))) |
| a.append("hello") |
| self.assertEqual(a, list(range(5)) + ["hello"]) |
| a[5] = 5 |
| self.assertEqual(a, list(range(6))) |
| a.extend(range(6, 20)) |
| self.assertEqual(a, list(range(20))) |
| a[-5:] = [] |
| self.assertEqual(a, list(range(15))) |
| del a[10:15] |
| self.assertEqual(len(a), 10) |
| self.assertEqual(a, list(range(10))) |
| self.assertEqual(list(a), list(range(10))) |
| self.assertEqual(a[0], 0) |
| self.assertEqual(a[9], 9) |
| self.assertEqual(a[-10], 0) |
| self.assertEqual(a[-1], 9) |
| self.assertEqual(a[:5], list(range(5))) |
| |
| ## class CountedInput(file): |
| ## """Counts lines read by self.readline(). |
| ## |
| ## self.lineno is the 0-based ordinal of the last line read, up to |
| ## a maximum of one greater than the number of lines in the file. |
| ## |
| ## self.ateof is true if and only if the final "" line has been read, |
| ## at which point self.lineno stops incrementing, and further calls |
| ## to readline() continue to return "". |
| ## """ |
| ## |
| ## lineno = 0 |
| ## ateof = 0 |
| ## def readline(self): |
| ## if self.ateof: |
| ## return "" |
| ## s = file.readline(self) |
| ## # Next line works too. |
| ## # s = super(CountedInput, self).readline() |
| ## self.lineno += 1 |
| ## if s == "": |
| ## self.ateof = 1 |
| ## return s |
| ## |
| ## f = file(name=support.TESTFN, mode='w') |
| ## lines = ['a\n', 'b\n', 'c\n'] |
| ## try: |
| ## f.writelines(lines) |
| ## f.close() |
| ## f = CountedInput(support.TESTFN) |
| ## for (i, expected) in zip(range(1, 5) + [4], lines + 2 * [""]): |
| ## got = f.readline() |
| ## self.assertEqual(expected, got) |
| ## self.assertEqual(f.lineno, i) |
| ## self.assertEqual(f.ateof, (i > len(lines))) |
| ## f.close() |
| ## finally: |
| ## try: |
| ## f.close() |
| ## except: |
| ## pass |
| ## support.unlink(support.TESTFN) |
| |
| def test_keywords(self): |
| # Testing keyword args to basic type constructors ... |
| self.assertEqual(int(x=1), 1) |
| self.assertEqual(float(x=2), 2.0) |
| self.assertEqual(int(x=3), 3) |
| self.assertEqual(complex(imag=42, real=666), complex(666, 42)) |
| self.assertEqual(str(object=500), '500') |
| self.assertEqual(str(object=b'abc', errors='strict'), 'abc') |
| self.assertEqual(tuple(sequence=range(3)), (0, 1, 2)) |
| self.assertEqual(list(sequence=(0, 1, 2)), list(range(3))) |
| # note: as of Python 2.3, dict() no longer has an "items" keyword arg |
| |
| for constructor in (int, float, int, complex, str, str, |
| tuple, list): |
| try: |
| constructor(bogus_keyword_arg=1) |
| except TypeError: |
| pass |
| else: |
| self.fail("expected TypeError from bogus keyword argument to %r" |
| % constructor) |
| |
| def test_str_subclass_as_dict_key(self): |
| # Testing a str subclass used as dict key .. |
| |
| class cistr(str): |
| """Sublcass of str that computes __eq__ case-insensitively. |
| |
| Also computes a hash code of the string in canonical form. |
| """ |
| |
| def __init__(self, value): |
| self.canonical = value.lower() |
| self.hashcode = hash(self.canonical) |
| |
| def __eq__(self, other): |
| if not isinstance(other, cistr): |
| other = cistr(other) |
| return self.canonical == other.canonical |
| |
| def __hash__(self): |
| return self.hashcode |
| |
| self.assertEqual(cistr('ABC'), 'abc') |
| self.assertEqual('aBc', cistr('ABC')) |
| self.assertEqual(str(cistr('ABC')), 'ABC') |
| |
| d = {cistr('one'): 1, cistr('two'): 2, cistr('tHree'): 3} |
| self.assertEqual(d[cistr('one')], 1) |
| self.assertEqual(d[cistr('tWo')], 2) |
| self.assertEqual(d[cistr('THrEE')], 3) |
| self.assertIn(cistr('ONe'), d) |
| self.assertEqual(d.get(cistr('thrEE')), 3) |
| |
| def test_classic_comparisons(self): |
| # Testing classic comparisons... |
| class classic: |
| pass |
| |
| for base in (classic, int, object): |
| class C(base): |
| def __init__(self, value): |
| self.value = int(value) |
| def __eq__(self, other): |
| if isinstance(other, C): |
| return self.value == other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value == other |
| return NotImplemented |
| def __ne__(self, other): |
| if isinstance(other, C): |
| return self.value != other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value != other |
| return NotImplemented |
| def __lt__(self, other): |
| if isinstance(other, C): |
| return self.value < other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value < other |
| return NotImplemented |
| def __le__(self, other): |
| if isinstance(other, C): |
| return self.value <= other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value <= other |
| return NotImplemented |
| def __gt__(self, other): |
| if isinstance(other, C): |
| return self.value > other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value > other |
| return NotImplemented |
| def __ge__(self, other): |
| if isinstance(other, C): |
| return self.value >= other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value >= other |
| return NotImplemented |
| |
| c1 = C(1) |
| c2 = C(2) |
| c3 = C(3) |
| self.assertEqual(c1, 1) |
| c = {1: c1, 2: c2, 3: c3} |
| for x in 1, 2, 3: |
| for y in 1, 2, 3: |
| for op in "<", "<=", "==", "!=", ">", ">=": |
| self.assertTrue(eval("c[x] %s c[y]" % op) == |
| eval("x %s y" % op), |
| "x=%d, y=%d" % (x, y)) |
| self.assertTrue(eval("c[x] %s y" % op) == |
| eval("x %s y" % op), |
| "x=%d, y=%d" % (x, y)) |
| self.assertTrue(eval("x %s c[y]" % op) == |
| eval("x %s y" % op), |
| "x=%d, y=%d" % (x, y)) |
| |
| def test_rich_comparisons(self): |
| # Testing rich comparisons... |
| class Z(complex): |
| pass |
| z = Z(1) |
| self.assertEqual(z, 1+0j) |
| self.assertEqual(1+0j, z) |
| class ZZ(complex): |
| def __eq__(self, other): |
| try: |
| return abs(self - other) <= 1e-6 |
| except: |
| return NotImplemented |
| zz = ZZ(1.0000003) |
| self.assertEqual(zz, 1+0j) |
| self.assertEqual(1+0j, zz) |
| |
| class classic: |
| pass |
| for base in (classic, int, object, list): |
| class C(base): |
| def __init__(self, value): |
| self.value = int(value) |
| def __cmp__(self_, other): |
| self.fail("shouldn't call __cmp__") |
| def __eq__(self, other): |
| if isinstance(other, C): |
| return self.value == other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value == other |
| return NotImplemented |
| def __ne__(self, other): |
| if isinstance(other, C): |
| return self.value != other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value != other |
| return NotImplemented |
| def __lt__(self, other): |
| if isinstance(other, C): |
| return self.value < other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value < other |
| return NotImplemented |
| def __le__(self, other): |
| if isinstance(other, C): |
| return self.value <= other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value <= other |
| return NotImplemented |
| def __gt__(self, other): |
| if isinstance(other, C): |
| return self.value > other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value > other |
| return NotImplemented |
| def __ge__(self, other): |
| if isinstance(other, C): |
| return self.value >= other.value |
| if isinstance(other, int) or isinstance(other, int): |
| return self.value >= other |
| return NotImplemented |
| c1 = C(1) |
| c2 = C(2) |
| c3 = C(3) |
| self.assertEqual(c1, 1) |
| c = {1: c1, 2: c2, 3: c3} |
| for x in 1, 2, 3: |
| for y in 1, 2, 3: |
| for op in "<", "<=", "==", "!=", ">", ">=": |
| self.assertTrue(eval("c[x] %s c[y]" % op) == eval("x %s y" % op), |
| "x=%d, y=%d" % (x, y)) |
| self.assertTrue(eval("c[x] %s y" % op) == eval("x %s y" % op), |
| "x=%d, y=%d" % (x, y)) |
| self.assertTrue(eval("x %s c[y]" % op) == eval("x %s y" % op), |
| "x=%d, y=%d" % (x, y)) |
| |
| def test_descrdoc(self): |
| # Testing descriptor doc strings... |
| from _io import FileIO |
| def check(descr, what): |
| self.assertEqual(descr.__doc__, what) |
| check(FileIO.closed, "True if the file is closed") # getset descriptor |
| check(complex.real, "the real part of a complex number") # member descriptor |
| |
| def test_doc_descriptor(self): |
| # Testing __doc__ descriptor... |
| # SF bug 542984 |
| class DocDescr(object): |
| def __get__(self, object, otype): |
| if object: |
| object = object.__class__.__name__ + ' instance' |
| if otype: |
| otype = otype.__name__ |
| return 'object=%s; type=%s' % (object, otype) |
| class OldClass: |
| __doc__ = DocDescr() |
| class NewClass(object): |
| __doc__ = DocDescr() |
| self.assertEqual(OldClass.__doc__, 'object=None; type=OldClass') |
| self.assertEqual(OldClass().__doc__, 'object=OldClass instance; type=OldClass') |
| self.assertEqual(NewClass.__doc__, 'object=None; type=NewClass') |
| self.assertEqual(NewClass().__doc__, 'object=NewClass instance; type=NewClass') |
| |
| def test_set_class(self): |
| # Testing __class__ assignment... |
| class C(object): pass |
| class D(object): pass |
| class E(object): pass |
| class F(D, E): pass |
| for cls in C, D, E, F: |
| for cls2 in C, D, E, F: |
| x = cls() |
| x.__class__ = cls2 |
| self.assertTrue(x.__class__ is cls2) |
| x.__class__ = cls |
| self.assertTrue(x.__class__ is cls) |
| def cant(x, C): |
| try: |
| x.__class__ = C |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't allow %r.__class__ = %r" % (x, C)) |
| try: |
| delattr(x, "__class__") |
| except (TypeError, AttributeError): |
| pass |
| else: |
| self.fail("shouldn't allow del %r.__class__" % x) |
| cant(C(), list) |
| cant(list(), C) |
| cant(C(), 1) |
| cant(C(), object) |
| cant(object(), list) |
| cant(list(), object) |
| class Int(int): __slots__ = [] |
| cant(2, Int) |
| cant(Int(), int) |
| cant(True, int) |
| cant(2, bool) |
| o = object() |
| cant(o, type(1)) |
| cant(o, type(None)) |
| del o |
| class G(object): |
| __slots__ = ["a", "b"] |
| class H(object): |
| __slots__ = ["b", "a"] |
| class I(object): |
| __slots__ = ["a", "b"] |
| class J(object): |
| __slots__ = ["c", "b"] |
| class K(object): |
| __slots__ = ["a", "b", "d"] |
| class L(H): |
| __slots__ = ["e"] |
| class M(I): |
| __slots__ = ["e"] |
| class N(J): |
| __slots__ = ["__weakref__"] |
| class P(J): |
| __slots__ = ["__dict__"] |
| class Q(J): |
| pass |
| class R(J): |
| __slots__ = ["__dict__", "__weakref__"] |
| |
| for cls, cls2 in ((G, H), (G, I), (I, H), (Q, R), (R, Q)): |
| x = cls() |
| x.a = 1 |
| x.__class__ = cls2 |
| self.assertTrue(x.__class__ is cls2, |
| "assigning %r as __class__ for %r silently failed" % (cls2, x)) |
| self.assertEqual(x.a, 1) |
| x.__class__ = cls |
| self.assertTrue(x.__class__ is cls, |
| "assigning %r as __class__ for %r silently failed" % (cls, x)) |
| self.assertEqual(x.a, 1) |
| for cls in G, J, K, L, M, N, P, R, list, Int: |
| for cls2 in G, J, K, L, M, N, P, R, list, Int: |
| if cls is cls2: |
| continue |
| cant(cls(), cls2) |
| |
| # Issue5283: when __class__ changes in __del__, the wrong |
| # type gets DECREF'd. |
| class O(object): |
| pass |
| class A(object): |
| def __del__(self): |
| self.__class__ = O |
| l = [A() for x in range(100)] |
| del l |
| |
| def test_set_dict(self): |
| # Testing __dict__ assignment... |
| class C(object): pass |
| a = C() |
| a.__dict__ = {'b': 1} |
| self.assertEqual(a.b, 1) |
| def cant(x, dict): |
| try: |
| x.__dict__ = dict |
| except (AttributeError, TypeError): |
| pass |
| else: |
| self.fail("shouldn't allow %r.__dict__ = %r" % (x, dict)) |
| cant(a, None) |
| cant(a, []) |
| cant(a, 1) |
| del a.__dict__ # Deleting __dict__ is allowed |
| |
| class Base(object): |
| pass |
| def verify_dict_readonly(x): |
| """ |
| x has to be an instance of a class inheriting from Base. |
| """ |
| cant(x, {}) |
| try: |
| del x.__dict__ |
| except (AttributeError, TypeError): |
| pass |
| else: |
| self.fail("shouldn't allow del %r.__dict__" % x) |
| dict_descr = Base.__dict__["__dict__"] |
| try: |
| dict_descr.__set__(x, {}) |
| except (AttributeError, TypeError): |
| pass |
| else: |
| self.fail("dict_descr allowed access to %r's dict" % x) |
| |
| # Classes don't allow __dict__ assignment and have readonly dicts |
| class Meta1(type, Base): |
| pass |
| class Meta2(Base, type): |
| pass |
| class D(object, metaclass=Meta1): |
| pass |
| class E(object, metaclass=Meta2): |
| pass |
| for cls in C, D, E: |
| verify_dict_readonly(cls) |
| class_dict = cls.__dict__ |
| try: |
| class_dict["spam"] = "eggs" |
| except TypeError: |
| pass |
| else: |
| self.fail("%r's __dict__ can be modified" % cls) |
| |
| # Modules also disallow __dict__ assignment |
| class Module1(types.ModuleType, Base): |
| pass |
| class Module2(Base, types.ModuleType): |
| pass |
| for ModuleType in Module1, Module2: |
| mod = ModuleType("spam") |
| verify_dict_readonly(mod) |
| mod.__dict__["spam"] = "eggs" |
| |
| # Exception's __dict__ can be replaced, but not deleted |
| # (at least not any more than regular exception's __dict__ can |
| # be deleted; on CPython it is not the case, whereas on PyPy they |
| # can, just like any other new-style instance's __dict__.) |
| def can_delete_dict(e): |
| try: |
| del e.__dict__ |
| except (TypeError, AttributeError): |
| return False |
| else: |
| return True |
| class Exception1(Exception, Base): |
| pass |
| class Exception2(Base, Exception): |
| pass |
| for ExceptionType in Exception, Exception1, Exception2: |
| e = ExceptionType() |
| e.__dict__ = {"a": 1} |
| self.assertEqual(e.a, 1) |
| self.assertEqual(can_delete_dict(e), can_delete_dict(ValueError())) |
| |
| def test_pickles(self): |
| # Testing pickling and copying new-style classes and objects... |
| import pickle |
| |
| def sorteditems(d): |
| L = list(d.items()) |
| L.sort() |
| return L |
| |
| global C |
| class C(object): |
| def __init__(self, a, b): |
| super(C, self).__init__() |
| self.a = a |
| self.b = b |
| def __repr__(self): |
| return "C(%r, %r)" % (self.a, self.b) |
| |
| global C1 |
| class C1(list): |
| def __new__(cls, a, b): |
| return super(C1, cls).__new__(cls) |
| def __getnewargs__(self): |
| return (self.a, self.b) |
| def __init__(self, a, b): |
| self.a = a |
| self.b = b |
| def __repr__(self): |
| return "C1(%r, %r)<%r>" % (self.a, self.b, list(self)) |
| |
| global C2 |
| class C2(int): |
| def __new__(cls, a, b, val=0): |
| return super(C2, cls).__new__(cls, val) |
| def __getnewargs__(self): |
| return (self.a, self.b, int(self)) |
| def __init__(self, a, b, val=0): |
| self.a = a |
| self.b = b |
| def __repr__(self): |
| return "C2(%r, %r)<%r>" % (self.a, self.b, int(self)) |
| |
| global C3 |
| class C3(object): |
| def __init__(self, foo): |
| self.foo = foo |
| def __getstate__(self): |
| return self.foo |
| def __setstate__(self, foo): |
| self.foo = foo |
| |
| global C4classic, C4 |
| class C4classic: # classic |
| pass |
| class C4(C4classic, object): # mixed inheritance |
| pass |
| |
| for bin in 0, 1: |
| for cls in C, C1, C2: |
| s = pickle.dumps(cls, bin) |
| cls2 = pickle.loads(s) |
| self.assertTrue(cls2 is cls) |
| |
| a = C1(1, 2); a.append(42); a.append(24) |
| b = C2("hello", "world", 42) |
| s = pickle.dumps((a, b), bin) |
| x, y = pickle.loads(s) |
| self.assertEqual(x.__class__, a.__class__) |
| self.assertEqual(sorteditems(x.__dict__), sorteditems(a.__dict__)) |
| self.assertEqual(y.__class__, b.__class__) |
| self.assertEqual(sorteditems(y.__dict__), sorteditems(b.__dict__)) |
| self.assertEqual(repr(x), repr(a)) |
| self.assertEqual(repr(y), repr(b)) |
| # Test for __getstate__ and __setstate__ on new style class |
| u = C3(42) |
| s = pickle.dumps(u, bin) |
| v = pickle.loads(s) |
| self.assertEqual(u.__class__, v.__class__) |
| self.assertEqual(u.foo, v.foo) |
| # Test for picklability of hybrid class |
| u = C4() |
| u.foo = 42 |
| s = pickle.dumps(u, bin) |
| v = pickle.loads(s) |
| self.assertEqual(u.__class__, v.__class__) |
| self.assertEqual(u.foo, v.foo) |
| |
| # Testing copy.deepcopy() |
| import copy |
| for cls in C, C1, C2: |
| cls2 = copy.deepcopy(cls) |
| self.assertTrue(cls2 is cls) |
| |
| a = C1(1, 2); a.append(42); a.append(24) |
| b = C2("hello", "world", 42) |
| x, y = copy.deepcopy((a, b)) |
| self.assertEqual(x.__class__, a.__class__) |
| self.assertEqual(sorteditems(x.__dict__), sorteditems(a.__dict__)) |
| self.assertEqual(y.__class__, b.__class__) |
| self.assertEqual(sorteditems(y.__dict__), sorteditems(b.__dict__)) |
| self.assertEqual(repr(x), repr(a)) |
| self.assertEqual(repr(y), repr(b)) |
| |
| def test_pickle_slots(self): |
| # Testing pickling of classes with __slots__ ... |
| import pickle |
| # Pickling of classes with __slots__ but without __getstate__ should fail |
| # (if using protocol 0 or 1) |
| global B, C, D, E |
| class B(object): |
| pass |
| for base in [object, B]: |
| class C(base): |
| __slots__ = ['a'] |
| class D(C): |
| pass |
| try: |
| pickle.dumps(C(), 0) |
| except TypeError: |
| pass |
| else: |
| self.fail("should fail: pickle C instance - %s" % base) |
| try: |
| pickle.dumps(C(), 0) |
| except TypeError: |
| pass |
| else: |
| self.fail("should fail: pickle D instance - %s" % base) |
| # Give C a nice generic __getstate__ and __setstate__ |
| class C(base): |
| __slots__ = ['a'] |
| def __getstate__(self): |
| try: |
| d = self.__dict__.copy() |
| except AttributeError: |
| d = {} |
| for cls in self.__class__.__mro__: |
| for sn in cls.__dict__.get('__slots__', ()): |
| try: |
| d[sn] = getattr(self, sn) |
| except AttributeError: |
| pass |
| return d |
| def __setstate__(self, d): |
| for k, v in list(d.items()): |
| setattr(self, k, v) |
| class D(C): |
| pass |
| # Now it should work |
| x = C() |
| y = pickle.loads(pickle.dumps(x)) |
| self.assertEqual(hasattr(y, 'a'), 0) |
| x.a = 42 |
| y = pickle.loads(pickle.dumps(x)) |
| self.assertEqual(y.a, 42) |
| x = D() |
| x.a = 42 |
| x.b = 100 |
| y = pickle.loads(pickle.dumps(x)) |
| self.assertEqual(y.a + y.b, 142) |
| # A subclass that adds a slot should also work |
| class E(C): |
| __slots__ = ['b'] |
| x = E() |
| x.a = 42 |
| x.b = "foo" |
| y = pickle.loads(pickle.dumps(x)) |
| self.assertEqual(y.a, x.a) |
| self.assertEqual(y.b, x.b) |
| |
| def test_binary_operator_override(self): |
| # Testing overrides of binary operations... |
| class I(int): |
| def __repr__(self): |
| return "I(%r)" % int(self) |
| def __add__(self, other): |
| return I(int(self) + int(other)) |
| __radd__ = __add__ |
| def __pow__(self, other, mod=None): |
| if mod is None: |
| return I(pow(int(self), int(other))) |
| else: |
| return I(pow(int(self), int(other), int(mod))) |
| def __rpow__(self, other, mod=None): |
| if mod is None: |
| return I(pow(int(other), int(self), mod)) |
| else: |
| return I(pow(int(other), int(self), int(mod))) |
| |
| self.assertEqual(repr(I(1) + I(2)), "I(3)") |
| self.assertEqual(repr(I(1) + 2), "I(3)") |
| self.assertEqual(repr(1 + I(2)), "I(3)") |
| self.assertEqual(repr(I(2) ** I(3)), "I(8)") |
| self.assertEqual(repr(2 ** I(3)), "I(8)") |
| self.assertEqual(repr(I(2) ** 3), "I(8)") |
| self.assertEqual(repr(pow(I(2), I(3), I(5))), "I(3)") |
| class S(str): |
| def __eq__(self, other): |
| return self.lower() == other.lower() |
| |
| def test_subclass_propagation(self): |
| # Testing propagation of slot functions to subclasses... |
| class A(object): |
| pass |
| class B(A): |
| pass |
| class C(A): |
| pass |
| class D(B, C): |
| pass |
| d = D() |
| orig_hash = hash(d) # related to id(d) in platform-dependent ways |
| A.__hash__ = lambda self: 42 |
| self.assertEqual(hash(d), 42) |
| C.__hash__ = lambda self: 314 |
| self.assertEqual(hash(d), 314) |
| B.__hash__ = lambda self: 144 |
| self.assertEqual(hash(d), 144) |
| D.__hash__ = lambda self: 100 |
| self.assertEqual(hash(d), 100) |
| D.__hash__ = None |
| self.assertRaises(TypeError, hash, d) |
| del D.__hash__ |
| self.assertEqual(hash(d), 144) |
| B.__hash__ = None |
| self.assertRaises(TypeError, hash, d) |
| del B.__hash__ |
| self.assertEqual(hash(d), 314) |
| C.__hash__ = None |
| self.assertRaises(TypeError, hash, d) |
| del C.__hash__ |
| self.assertEqual(hash(d), 42) |
| A.__hash__ = None |
| self.assertRaises(TypeError, hash, d) |
| del A.__hash__ |
| self.assertEqual(hash(d), orig_hash) |
| d.foo = 42 |
| d.bar = 42 |
| self.assertEqual(d.foo, 42) |
| self.assertEqual(d.bar, 42) |
| def __getattribute__(self, name): |
| if name == "foo": |
| return 24 |
| return object.__getattribute__(self, name) |
| A.__getattribute__ = __getattribute__ |
| self.assertEqual(d.foo, 24) |
| self.assertEqual(d.bar, 42) |
| def __getattr__(self, name): |
| if name in ("spam", "foo", "bar"): |
| return "hello" |
| raise AttributeError(name) |
| B.__getattr__ = __getattr__ |
| self.assertEqual(d.spam, "hello") |
| self.assertEqual(d.foo, 24) |
| self.assertEqual(d.bar, 42) |
| del A.__getattribute__ |
| self.assertEqual(d.foo, 42) |
| del d.foo |
| self.assertEqual(d.foo, "hello") |
| self.assertEqual(d.bar, 42) |
| del B.__getattr__ |
| try: |
| d.foo |
| except AttributeError: |
| pass |
| else: |
| self.fail("d.foo should be undefined now") |
| |
| # Test a nasty bug in recurse_down_subclasses() |
| class A(object): |
| pass |
| class B(A): |
| pass |
| del B |
| support.gc_collect() |
| A.__setitem__ = lambda *a: None # crash |
| |
| def test_buffer_inheritance(self): |
| # Testing that buffer interface is inherited ... |
| |
| import binascii |
| # SF bug [#470040] ParseTuple t# vs subclasses. |
| |
| class MyBytes(bytes): |
| pass |
| base = b'abc' |
| m = MyBytes(base) |
| # b2a_hex uses the buffer interface to get its argument's value, via |
| # PyArg_ParseTuple 't#' code. |
| self.assertEqual(binascii.b2a_hex(m), binascii.b2a_hex(base)) |
| |
| class MyInt(int): |
| pass |
| m = MyInt(42) |
| try: |
| binascii.b2a_hex(m) |
| self.fail('subclass of int should not have a buffer interface') |
| except TypeError: |
| pass |
| |
| def test_str_of_str_subclass(self): |
| # Testing __str__ defined in subclass of str ... |
| import binascii |
| import io |
| |
| class octetstring(str): |
| def __str__(self): |
| return binascii.b2a_hex(self.encode('ascii')).decode("ascii") |
| def __repr__(self): |
| return self + " repr" |
| |
| o = octetstring('A') |
| self.assertEqual(type(o), octetstring) |
| self.assertEqual(type(str(o)), str) |
| self.assertEqual(type(repr(o)), str) |
| self.assertEqual(ord(o), 0x41) |
| self.assertEqual(str(o), '41') |
| self.assertEqual(repr(o), 'A repr') |
| self.assertEqual(o.__str__(), '41') |
| self.assertEqual(o.__repr__(), 'A repr') |
| |
| capture = io.StringIO() |
| # Calling str() or not exercises different internal paths. |
| print(o, file=capture) |
| print(str(o), file=capture) |
| self.assertEqual(capture.getvalue(), '41\n41\n') |
| capture.close() |
| |
| def test_keyword_arguments(self): |
| # Testing keyword arguments to __init__, __call__... |
| def f(a): return a |
| self.assertEqual(f.__call__(a=42), 42) |
| a = [] |
| list.__init__(a, sequence=[0, 1, 2]) |
| self.assertEqual(a, [0, 1, 2]) |
| |
| def test_recursive_call(self): |
| # Testing recursive __call__() by setting to instance of class... |
| class A(object): |
| pass |
| |
| A.__call__ = A() |
| try: |
| A()() |
| except RuntimeError: |
| pass |
| else: |
| self.fail("Recursion limit should have been reached for __call__()") |
| |
| def test_delete_hook(self): |
| # Testing __del__ hook... |
| log = [] |
| class C(object): |
| def __del__(self): |
| log.append(1) |
| c = C() |
| self.assertEqual(log, []) |
| del c |
| support.gc_collect() |
| self.assertEqual(log, [1]) |
| |
| class D(object): pass |
| d = D() |
| try: del d[0] |
| except TypeError: pass |
| else: self.fail("invalid del() didn't raise TypeError") |
| |
| def test_hash_inheritance(self): |
| # Testing hash of mutable subclasses... |
| |
| class mydict(dict): |
| pass |
| d = mydict() |
| try: |
| hash(d) |
| except TypeError: |
| pass |
| else: |
| self.fail("hash() of dict subclass should fail") |
| |
| class mylist(list): |
| pass |
| d = mylist() |
| try: |
| hash(d) |
| except TypeError: |
| pass |
| else: |
| self.fail("hash() of list subclass should fail") |
| |
| def test_str_operations(self): |
| try: 'a' + 5 |
| except TypeError: pass |
| else: self.fail("'' + 5 doesn't raise TypeError") |
| |
| try: ''.split('') |
| except ValueError: pass |
| else: self.fail("''.split('') doesn't raise ValueError") |
| |
| try: ''.join([0]) |
| except TypeError: pass |
| else: self.fail("''.join([0]) doesn't raise TypeError") |
| |
| try: ''.rindex('5') |
| except ValueError: pass |
| else: self.fail("''.rindex('5') doesn't raise ValueError") |
| |
| try: '%(n)s' % None |
| except TypeError: pass |
| else: self.fail("'%(n)s' % None doesn't raise TypeError") |
| |
| try: '%(n' % {} |
| except ValueError: pass |
| else: self.fail("'%(n' % {} '' doesn't raise ValueError") |
| |
| try: '%*s' % ('abc') |
| except TypeError: pass |
| else: self.fail("'%*s' % ('abc') doesn't raise TypeError") |
| |
| try: '%*.*s' % ('abc', 5) |
| except TypeError: pass |
| else: self.fail("'%*.*s' % ('abc', 5) doesn't raise TypeError") |
| |
| try: '%s' % (1, 2) |
| except TypeError: pass |
| else: self.fail("'%s' % (1, 2) doesn't raise TypeError") |
| |
| try: '%' % None |
| except ValueError: pass |
| else: self.fail("'%' % None doesn't raise ValueError") |
| |
| self.assertEqual('534253'.isdigit(), 1) |
| self.assertEqual('534253x'.isdigit(), 0) |
| self.assertEqual('%c' % 5, '\x05') |
| self.assertEqual('%c' % '5', '5') |
| |
| def test_deepcopy_recursive(self): |
| # Testing deepcopy of recursive objects... |
| class Node: |
| pass |
| a = Node() |
| b = Node() |
| a.b = b |
| b.a = a |
| z = deepcopy(a) # This blew up before |
| |
| def test_unintialized_modules(self): |
| # Testing uninitialized module objects... |
| from types import ModuleType as M |
| m = M.__new__(M) |
| str(m) |
| self.assertEqual(hasattr(m, "__name__"), 0) |
| self.assertEqual(hasattr(m, "__file__"), 0) |
| self.assertEqual(hasattr(m, "foo"), 0) |
| self.assertFalse(m.__dict__) # None or {} are both reasonable answers |
| m.foo = 1 |
| self.assertEqual(m.__dict__, {"foo": 1}) |
| |
| def test_funny_new(self): |
| # Testing __new__ returning something unexpected... |
| class C(object): |
| def __new__(cls, arg): |
| if isinstance(arg, str): return [1, 2, 3] |
| elif isinstance(arg, int): return object.__new__(D) |
| else: return object.__new__(cls) |
| class D(C): |
| def __init__(self, arg): |
| self.foo = arg |
| self.assertEqual(C("1"), [1, 2, 3]) |
| self.assertEqual(D("1"), [1, 2, 3]) |
| d = D(None) |
| self.assertEqual(d.foo, None) |
| d = C(1) |
| self.assertIsInstance(d, D) |
| self.assertEqual(d.foo, 1) |
| d = D(1) |
| self.assertIsInstance(d, D) |
| self.assertEqual(d.foo, 1) |
| |
| def test_imul_bug(self): |
| # Testing for __imul__ problems... |
| # SF bug 544647 |
| class C(object): |
| def __imul__(self, other): |
| return (self, other) |
| x = C() |
| y = x |
| y *= 1.0 |
| self.assertEqual(y, (x, 1.0)) |
| y = x |
| y *= 2 |
| self.assertEqual(y, (x, 2)) |
| y = x |
| y *= 3 |
| self.assertEqual(y, (x, 3)) |
| y = x |
| y *= 1<<100 |
| self.assertEqual(y, (x, 1<<100)) |
| y = x |
| y *= None |
| self.assertEqual(y, (x, None)) |
| y = x |
| y *= "foo" |
| self.assertEqual(y, (x, "foo")) |
| |
| def test_copy_setstate(self): |
| # Testing that copy.*copy() correctly uses __setstate__... |
| import copy |
| class C(object): |
| def __init__(self, foo=None): |
| self.foo = foo |
| self.__foo = foo |
| def setfoo(self, foo=None): |
| self.foo = foo |
| def getfoo(self): |
| return self.__foo |
| def __getstate__(self): |
| return [self.foo] |
| def __setstate__(self_, lst): |
| self.assertEqual(len(lst), 1) |
| self_.__foo = self_.foo = lst[0] |
| a = C(42) |
| a.setfoo(24) |
| self.assertEqual(a.foo, 24) |
| self.assertEqual(a.getfoo(), 42) |
| b = copy.copy(a) |
| self.assertEqual(b.foo, 24) |
| self.assertEqual(b.getfoo(), 24) |
| b = copy.deepcopy(a) |
| self.assertEqual(b.foo, 24) |
| self.assertEqual(b.getfoo(), 24) |
| |
| def test_slices(self): |
| # Testing cases with slices and overridden __getitem__ ... |
| |
| # Strings |
| self.assertEqual("hello"[:4], "hell") |
| self.assertEqual("hello"[slice(4)], "hell") |
| self.assertEqual(str.__getitem__("hello", slice(4)), "hell") |
| class S(str): |
| def __getitem__(self, x): |
| return str.__getitem__(self, x) |
| self.assertEqual(S("hello")[:4], "hell") |
| self.assertEqual(S("hello")[slice(4)], "hell") |
| self.assertEqual(S("hello").__getitem__(slice(4)), "hell") |
| # Tuples |
| self.assertEqual((1,2,3)[:2], (1,2)) |
| self.assertEqual((1,2,3)[slice(2)], (1,2)) |
| self.assertEqual(tuple.__getitem__((1,2,3), slice(2)), (1,2)) |
| class T(tuple): |
| def __getitem__(self, x): |
| return tuple.__getitem__(self, x) |
| self.assertEqual(T((1,2,3))[:2], (1,2)) |
| self.assertEqual(T((1,2,3))[slice(2)], (1,2)) |
| self.assertEqual(T((1,2,3)).__getitem__(slice(2)), (1,2)) |
| # Lists |
| self.assertEqual([1,2,3][:2], [1,2]) |
| self.assertEqual([1,2,3][slice(2)], [1,2]) |
| self.assertEqual(list.__getitem__([1,2,3], slice(2)), [1,2]) |
| class L(list): |
| def __getitem__(self, x): |
| return list.__getitem__(self, x) |
| self.assertEqual(L([1,2,3])[:2], [1,2]) |
| self.assertEqual(L([1,2,3])[slice(2)], [1,2]) |
| self.assertEqual(L([1,2,3]).__getitem__(slice(2)), [1,2]) |
| # Now do lists and __setitem__ |
| a = L([1,2,3]) |
| a[slice(1, 3)] = [3,2] |
| self.assertEqual(a, [1,3,2]) |
| a[slice(0, 2, 1)] = [3,1] |
| self.assertEqual(a, [3,1,2]) |
| a.__setitem__(slice(1, 3), [2,1]) |
| self.assertEqual(a, [3,2,1]) |
| a.__setitem__(slice(0, 2, 1), [2,3]) |
| self.assertEqual(a, [2,3,1]) |
| |
| def test_subtype_resurrection(self): |
| # Testing resurrection of new-style instance... |
| |
| class C(object): |
| container = [] |
| |
| def __del__(self): |
| # resurrect the instance |
| C.container.append(self) |
| |
| c = C() |
| c.attr = 42 |
| |
| # The most interesting thing here is whether this blows up, due to |
| # flawed GC tracking logic in typeobject.c's call_finalizer() (a 2.2.1 |
| # bug). |
| del c |
| |
| # If that didn't blow up, it's also interesting to see whether clearing |
| # the last container slot works: that will attempt to delete c again, |
| # which will cause c to get appended back to the container again |
| # "during" the del. (On non-CPython implementations, however, __del__ |
| # is typically not called again.) |
| support.gc_collect() |
| self.assertEqual(len(C.container), 1) |
| del C.container[-1] |
| if support.check_impl_detail(): |
| support.gc_collect() |
| self.assertEqual(len(C.container), 1) |
| self.assertEqual(C.container[-1].attr, 42) |
| |
| # Make c mortal again, so that the test framework with -l doesn't report |
| # it as a leak. |
| del C.__del__ |
| |
| def test_slots_trash(self): |
| # Testing slot trash... |
| # Deallocating deeply nested slotted trash caused stack overflows |
| class trash(object): |
| __slots__ = ['x'] |
| def __init__(self, x): |
| self.x = x |
| o = None |
| for i in range(50000): |
| o = trash(o) |
| del o |
| |
| def test_slots_multiple_inheritance(self): |
| # SF bug 575229, multiple inheritance w/ slots dumps core |
| class A(object): |
| __slots__=() |
| class B(object): |
| pass |
| class C(A,B) : |
| __slots__=() |
| if support.check_impl_detail(): |
| self.assertEqual(C.__basicsize__, B.__basicsize__) |
| self.assertTrue(hasattr(C, '__dict__')) |
| self.assertTrue(hasattr(C, '__weakref__')) |
| C().x = 2 |
| |
| def test_rmul(self): |
| # Testing correct invocation of __rmul__... |
| # SF patch 592646 |
| class C(object): |
| def __mul__(self, other): |
| return "mul" |
| def __rmul__(self, other): |
| return "rmul" |
| a = C() |
| self.assertEqual(a*2, "mul") |
| self.assertEqual(a*2.2, "mul") |
| self.assertEqual(2*a, "rmul") |
| self.assertEqual(2.2*a, "rmul") |
| |
| def test_ipow(self): |
| # Testing correct invocation of __ipow__... |
| # [SF bug 620179] |
| class C(object): |
| def __ipow__(self, other): |
| pass |
| a = C() |
| a **= 2 |
| |
| def test_mutable_bases(self): |
| # Testing mutable bases... |
| |
| # stuff that should work: |
| class C(object): |
| pass |
| class C2(object): |
| def __getattribute__(self, attr): |
| if attr == 'a': |
| return 2 |
| else: |
| return super(C2, self).__getattribute__(attr) |
| def meth(self): |
| return 1 |
| class D(C): |
| pass |
| class E(D): |
| pass |
| d = D() |
| e = E() |
| D.__bases__ = (C,) |
| D.__bases__ = (C2,) |
| self.assertEqual(d.meth(), 1) |
| self.assertEqual(e.meth(), 1) |
| self.assertEqual(d.a, 2) |
| self.assertEqual(e.a, 2) |
| self.assertEqual(C2.__subclasses__(), [D]) |
| |
| try: |
| del D.__bases__ |
| except (TypeError, AttributeError): |
| pass |
| else: |
| self.fail("shouldn't be able to delete .__bases__") |
| |
| try: |
| D.__bases__ = () |
| except TypeError as msg: |
| if str(msg) == "a new-style class can't have only classic bases": |
| self.fail("wrong error message for .__bases__ = ()") |
| else: |
| self.fail("shouldn't be able to set .__bases__ to ()") |
| |
| try: |
| D.__bases__ = (D,) |
| except TypeError: |
| pass |
| else: |
| # actually, we'll have crashed by here... |
| self.fail("shouldn't be able to create inheritance cycles") |
| |
| try: |
| D.__bases__ = (C, C) |
| except TypeError: |
| pass |
| else: |
| self.fail("didn't detect repeated base classes") |
| |
| try: |
| D.__bases__ = (E,) |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't be able to create inheritance cycles") |
| |
| def test_builtin_bases(self): |
| # Make sure all the builtin types can have their base queried without |
| # segfaulting. See issue #5787. |
| builtin_types = [tp for tp in builtins.__dict__.values() |
| if isinstance(tp, type)] |
| for tp in builtin_types: |
| object.__getattribute__(tp, "__bases__") |
| if tp is not object: |
| self.assertEqual(len(tp.__bases__), 1, tp) |
| |
| class L(list): |
| pass |
| |
| class C(object): |
| pass |
| |
| class D(C): |
| pass |
| |
| try: |
| L.__bases__ = (dict,) |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't turn list subclass into dict subclass") |
| |
| try: |
| list.__bases__ = (dict,) |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't be able to assign to list.__bases__") |
| |
| try: |
| D.__bases__ = (C, list) |
| except TypeError: |
| pass |
| else: |
| assert 0, "best_base calculation found wanting" |
| |
| |
| def test_mutable_bases_with_failing_mro(self): |
| # Testing mutable bases with failing mro... |
| class WorkOnce(type): |
| def __new__(self, name, bases, ns): |
| self.flag = 0 |
| return super(WorkOnce, self).__new__(WorkOnce, name, bases, ns) |
| def mro(self): |
| if self.flag > 0: |
| raise RuntimeError("bozo") |
| else: |
| self.flag += 1 |
| return type.mro(self) |
| |
| class WorkAlways(type): |
| def mro(self): |
| # this is here to make sure that .mro()s aren't called |
| # with an exception set (which was possible at one point). |
| # An error message will be printed in a debug build. |
| # What's a good way to test for this? |
| return type.mro(self) |
| |
| class C(object): |
| pass |
| |
| class C2(object): |
| pass |
| |
| class D(C): |
| pass |
| |
| class E(D): |
| pass |
| |
| class F(D, metaclass=WorkOnce): |
| pass |
| |
| class G(D, metaclass=WorkAlways): |
| pass |
| |
| # Immediate subclasses have their mro's adjusted in alphabetical |
| # order, so E's will get adjusted before adjusting F's fails. We |
| # check here that E's gets restored. |
| |
| E_mro_before = E.__mro__ |
| D_mro_before = D.__mro__ |
| |
| try: |
| D.__bases__ = (C2,) |
| except RuntimeError: |
| self.assertEqual(E.__mro__, E_mro_before) |
| self.assertEqual(D.__mro__, D_mro_before) |
| else: |
| self.fail("exception not propagated") |
| |
| def test_mutable_bases_catch_mro_conflict(self): |
| # Testing mutable bases catch mro conflict... |
| class A(object): |
| pass |
| |
| class B(object): |
| pass |
| |
| class C(A, B): |
| pass |
| |
| class D(A, B): |
| pass |
| |
| class E(C, D): |
| pass |
| |
| try: |
| C.__bases__ = (B, A) |
| except TypeError: |
| pass |
| else: |
| self.fail("didn't catch MRO conflict") |
| |
| def test_mutable_names(self): |
| # Testing mutable names... |
| class C(object): |
| pass |
| |
| # C.__module__ could be 'test_descr' or '__main__' |
| mod = C.__module__ |
| |
| C.__name__ = 'D' |
| self.assertEqual((C.__module__, C.__name__), (mod, 'D')) |
| |
| C.__name__ = 'D.E' |
| self.assertEqual((C.__module__, C.__name__), (mod, 'D.E')) |
| |
| def test_subclass_right_op(self): |
| # Testing correct dispatch of subclass overloading __r<op>__... |
| |
| # This code tests various cases where right-dispatch of a subclass |
| # should be preferred over left-dispatch of a base class. |
| |
| # Case 1: subclass of int; this tests code in abstract.c::binary_op1() |
| |
| class B(int): |
| def __floordiv__(self, other): |
| return "B.__floordiv__" |
| def __rfloordiv__(self, other): |
| return "B.__rfloordiv__" |
| |
| self.assertEqual(B(1) // 1, "B.__floordiv__") |
| self.assertEqual(1 // B(1), "B.__rfloordiv__") |
| |
| # Case 2: subclass of object; this is just the baseline for case 3 |
| |
| class C(object): |
| def __floordiv__(self, other): |
| return "C.__floordiv__" |
| def __rfloordiv__(self, other): |
| return "C.__rfloordiv__" |
| |
| self.assertEqual(C() // 1, "C.__floordiv__") |
| self.assertEqual(1 // C(), "C.__rfloordiv__") |
| |
| # Case 3: subclass of new-style class; here it gets interesting |
| |
| class D(C): |
| def __floordiv__(self, other): |
| return "D.__floordiv__" |
| def __rfloordiv__(self, other): |
| return "D.__rfloordiv__" |
| |
| self.assertEqual(D() // C(), "D.__floordiv__") |
| self.assertEqual(C() // D(), "D.__rfloordiv__") |
| |
| # Case 4: this didn't work right in 2.2.2 and 2.3a1 |
| |
| class E(C): |
| pass |
| |
| self.assertEqual(E.__rfloordiv__, C.__rfloordiv__) |
| |
| self.assertEqual(E() // 1, "C.__floordiv__") |
| self.assertEqual(1 // E(), "C.__rfloordiv__") |
| self.assertEqual(E() // C(), "C.__floordiv__") |
| self.assertEqual(C() // E(), "C.__floordiv__") # This one would fail |
| |
| @support.impl_detail("testing an internal kind of method object") |
| def test_meth_class_get(self): |
| # Testing __get__ method of METH_CLASS C methods... |
| # Full coverage of descrobject.c::classmethod_get() |
| |
| # Baseline |
| arg = [1, 2, 3] |
| res = {1: None, 2: None, 3: None} |
| self.assertEqual(dict.fromkeys(arg), res) |
| self.assertEqual({}.fromkeys(arg), res) |
| |
| # Now get the descriptor |
| descr = dict.__dict__["fromkeys"] |
| |
| # More baseline using the descriptor directly |
| self.assertEqual(descr.__get__(None, dict)(arg), res) |
| self.assertEqual(descr.__get__({})(arg), res) |
| |
| # Now check various error cases |
| try: |
| descr.__get__(None, None) |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't have allowed descr.__get__(None, None)") |
| try: |
| descr.__get__(42) |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't have allowed descr.__get__(42)") |
| try: |
| descr.__get__(None, 42) |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't have allowed descr.__get__(None, 42)") |
| try: |
| descr.__get__(None, int) |
| except TypeError: |
| pass |
| else: |
| self.fail("shouldn't have allowed descr.__get__(None, int)") |
| |
| def test_isinst_isclass(self): |
| # Testing proxy isinstance() and isclass()... |
| class Proxy(object): |
| def __init__(self, obj): |
| self.__obj = obj |
| def __getattribute__(self, name): |
| if name.startswith("_Proxy__"): |
| return object.__getattribute__(self, name) |
| else: |
| return getattr(self.__obj, name) |
| # Test with a classic class |
| class C: |
| pass |
| a = C() |
| pa = Proxy(a) |
| self.assertIsInstance(a, C) # Baseline |
| self.assertIsInstance(pa, C) # Test |
| # Test with a classic subclass |
| class D(C): |
| pass |
| a = D() |
| pa = Proxy(a) |
| self.assertIsInstance(a, C) # Baseline |
| self.assertIsInstance(pa, C) # Test |
| # Test with a new-style class |
| class C(object): |
| pass |
| a = C() |
| pa = Proxy(a) |
| self.assertIsInstance(a, C) # Baseline |
| self.assertIsInstance(pa, C) # Test |
| # Test with a new-style subclass |
| class D(C): |
| pass |
| a = D() |
| pa = Proxy(a) |
| self.assertIsInstance(a, C) # Baseline |
| self.assertIsInstance(pa, C) # Test |
| |
| def test_proxy_super(self): |
| # Testing super() for a proxy object... |
| class Proxy(object): |
| def __init__(self, obj): |
| self.__obj = obj |
| def __getattribute__(self, name): |
| if name.startswith("_Proxy__"): |
| return object.__getattribute__(self, name) |
| else: |
| return getattr(self.__obj, name) |
| |
| class B(object): |
| def f(self): |
| return "B.f" |
| |
| class C(B): |
| def f(self): |
| return super(C, self).f() + "->C.f" |
| |
| obj = C() |
| p = Proxy(obj) |
| self.assertEqual(C.__dict__["f"](p), "B.f->C.f") |
| |
| def test_carloverre(self): |
| # Testing prohibition of Carlo Verre's hack... |
| try: |
| object.__setattr__(str, "foo", 42) |
| except TypeError: |
| pass |
| else: |
| self.fail("Carlo Verre __setattr__ succeeded!") |
| try: |
| object.__delattr__(str, "lower") |
| except TypeError: |
| pass |
| else: |
| self.fail("Carlo Verre __delattr__ succeeded!") |
| |
| def test_weakref_segfault(self): |
| # Testing weakref segfault... |
| # SF 742911 |
| import weakref |
| |
| class Provoker: |
| def __init__(self, referrent): |
| self.ref = weakref.ref(referrent) |
| |
| def __del__(self): |
| x = self.ref() |
| |
| class Oops(object): |
| pass |
| |
| o = Oops() |
| o.whatever = Provoker(o) |
| del o |
| |
| def test_wrapper_segfault(self): |
| # SF 927248: deeply nested wrappers could cause stack overflow |
| f = lambda:None |
| for i in range(1000000): |
| f = f.__call__ |
| f = None |
| |
| def test_file_fault(self): |
| # Testing sys.stdout is changed in getattr... |
| test_stdout = sys.stdout |
| class StdoutGuard: |
| def __getattr__(self, attr): |
| sys.stdout = sys.__stdout__ |
| raise RuntimeError("Premature access to sys.stdout.%s" % attr) |
| sys.stdout = StdoutGuard() |
| try: |
| print("Oops!") |
| except RuntimeError: |
| pass |
| finally: |
| sys.stdout = test_stdout |
| |
| def test_vicious_descriptor_nonsense(self): |
| # Testing vicious_descriptor_nonsense... |
| |
| # A potential segfault spotted by Thomas Wouters in mail to |
| # python-dev 2003-04-17, turned into an example & fixed by Michael |
| # Hudson just less than four months later... |
| |
| class Evil(object): |
| def __hash__(self): |
| return hash('attr') |
| def __eq__(self, other): |
| del C.attr |
| return 0 |
| |
| class Descr(object): |
| def __get__(self, ob, type=None): |
| return 1 |
| |
| class C(object): |
| attr = Descr() |
| |
| c = C() |
| c.__dict__[Evil()] = 0 |
| |
| self.assertEqual(c.attr, 1) |
| # this makes a crash more likely: |
| support.gc_collect() |
| self.assertEqual(hasattr(c, 'attr'), False) |
| |
| def test_init(self): |
| # SF 1155938 |
| class Foo(object): |
| def __init__(self): |
| return 10 |
| try: |
| Foo() |
| except TypeError: |
| pass |
| else: |
| self.fail("did not test __init__() for None return") |
| |
| def test_method_wrapper(self): |
| # Testing method-wrapper objects... |
| # <type 'method-wrapper'> did not support any reflection before 2.5 |
| |
| # XXX should methods really support __eq__? |
| |
| l = [] |
| self.assertEqual(l.__add__, l.__add__) |
| self.assertEqual(l.__add__, [].__add__) |
| self.assertTrue(l.__add__ != [5].__add__) |
| self.assertTrue(l.__add__ != l.__mul__) |
| self.assertTrue(l.__add__.__name__ == '__add__') |
| if hasattr(l.__add__, '__self__'): |
| # CPython |
| self.assertTrue(l.__add__.__self__ is l) |
| self.assertTrue(l.__add__.__objclass__ is list) |
| else: |
| # Python implementations where [].__add__ is a normal bound method |
| self.assertTrue(l.__add__.im_self is l) |
| self.assertTrue(l.__add__.im_class is list) |
| self.assertEqual(l.__add__.__doc__, list.__add__.__doc__) |
| try: |
| hash(l.__add__) |
| except TypeError: |
| pass |
| else: |
| self.fail("no TypeError from hash([].__add__)") |
| |
| t = () |
| t += (7,) |
| self.assertEqual(t.__add__, (7,).__add__) |
| self.assertEqual(hash(t.__add__), hash((7,).__add__)) |
| |
| def test_not_implemented(self): |
| # Testing NotImplemented... |
| # all binary methods should be able to return a NotImplemented |
| import operator |
| |
| def specialmethod(self, other): |
| return NotImplemented |
| |
| def check(expr, x, y): |
| try: |
| exec(expr, {'x': x, 'y': y, 'operator': operator}) |
| except TypeError: |
| pass |
| else: |
| self.fail("no TypeError from %r" % (expr,)) |
| |
| N1 = sys.maxsize + 1 # might trigger OverflowErrors instead of |
| # TypeErrors |
| N2 = sys.maxsize # if sizeof(int) < sizeof(long), might trigger |
| # ValueErrors instead of TypeErrors |
| for name, expr, iexpr in [ |
| ('__add__', 'x + y', 'x += y'), |
| ('__sub__', 'x - y', 'x -= y'), |
| ('__mul__', 'x * y', 'x *= y'), |
| ('__truediv__', 'operator.truediv(x, y)', None), |
| ('__floordiv__', 'operator.floordiv(x, y)', None), |
| ('__div__', 'x / y', 'x /= y'), |
| ('__mod__', 'x % y', 'x %= y'), |
| ('__divmod__', 'divmod(x, y)', None), |
| ('__pow__', 'x ** y', 'x **= y'), |
| ('__lshift__', 'x << y', 'x <<= y'), |
| ('__rshift__', 'x >> y', 'x >>= y'), |
| ('__and__', 'x & y', 'x &= y'), |
| ('__or__', 'x | y', 'x |= y'), |
| ('__xor__', 'x ^ y', 'x ^= y')]: |
| rname = '__r' + name[2:] |
| A = type('A', (), {name: specialmethod}) |
| a = A() |
| check(expr, a, a) |
| check(expr, a, N1) |
| check(expr, a, N2) |
| if iexpr: |
| check(iexpr, a, a) |
| check(iexpr, a, N1) |
| check(iexpr, a, N2) |
| iname = '__i' + name[2:] |
| C = type('C', (), {iname: specialmethod}) |
| c = C() |
| check(iexpr, c, a) |
| check(iexpr, c, N1) |
| check(iexpr, c, N2) |
| |
| def test_assign_slice(self): |
| # ceval.c's assign_slice used to check for |
| # tp->tp_as_sequence->sq_slice instead of |
| # tp->tp_as_sequence->sq_ass_slice |
| |
| class C(object): |
| def __setitem__(self, idx, value): |
| self.value = value |
| |
| c = C() |
| c[1:2] = 3 |
| self.assertEqual(c.value, 3) |
| |
| def test_set_and_no_get(self): |
| # See |
| # http://mail.python.org/pipermail/python-dev/2010-January/095637.html |
| class Descr(object): |
| |
| def __init__(self, name): |
| self.name = name |
| |
| def __set__(self, obj, value): |
| obj.__dict__[self.name] = value |
| descr = Descr("a") |
| |
| class X(object): |
| a = descr |
| |
| x = X() |
| self.assertIs(x.a, descr) |
| x.a = 42 |
| self.assertEqual(x.a, 42) |
| |
| # Also check type_getattro for correctness. |
| class Meta(type): |
| pass |
| class X(object): |
| __metaclass__ = Meta |
| X.a = 42 |
| Meta.a = Descr("a") |
| self.assertEqual(X.a, 42) |
| |
| def test_getattr_hooks(self): |
| # issue 4230 |
| |
| class Descriptor(object): |
| counter = 0 |
| def __get__(self, obj, objtype=None): |
| def getter(name): |
| self.counter += 1 |
| raise AttributeError(name) |
| return getter |
| |
| descr = Descriptor() |
| class A(object): |
| __getattribute__ = descr |
| class B(object): |
| __getattr__ = descr |
| class C(object): |
| __getattribute__ = descr |
| __getattr__ = descr |
| |
| self.assertRaises(AttributeError, getattr, A(), "attr") |
| self.assertEqual(descr.counter, 1) |
| self.assertRaises(AttributeError, getattr, B(), "attr") |
| self.assertEqual(descr.counter, 2) |
| self.assertRaises(AttributeError, getattr, C(), "attr") |
| self.assertEqual(descr.counter, 4) |
| |
| import gc |
| class EvilGetattribute(object): |
| # This used to segfault |
| def __getattr__(self, name): |
| raise AttributeError(name) |
| def __getattribute__(self, name): |
| del EvilGetattribute.__getattr__ |
| for i in range(5): |
| gc.collect() |
| raise AttributeError(name) |
| |
| self.assertRaises(AttributeError, getattr, EvilGetattribute(), "attr") |
| |
| def test_abstractmethods(self): |
| # type pretends not to have __abstractmethods__. |
| self.assertRaises(AttributeError, getattr, type, "__abstractmethods__") |
| class meta(type): |
| pass |
| self.assertRaises(AttributeError, getattr, meta, "__abstractmethods__") |
| class X(object): |
| pass |
| with self.assertRaises(AttributeError): |
| del X.__abstractmethods__ |
| |
| def test_proxy_call(self): |
| class FakeStr: |
| __class__ = str |
| |
| fake_str = FakeStr() |
| # isinstance() reads __class__ |
| self.assertTrue(isinstance(fake_str, str)) |
| |
| # call a method descriptor |
| with self.assertRaises(TypeError): |
| str.split(fake_str) |
| |
| # call a slot wrapper descriptor |
| with self.assertRaises(TypeError): |
| str.__add__(fake_str, "abc") |
| |
| def test_repr_as_str(self): |
| # Issue #11603: crash or infinite loop when rebinding __str__ as |
| # __repr__. |
| class Foo: |
| pass |
| Foo.__repr__ = Foo.__str__ |
| foo = Foo() |
| str(foo) |
| |
| class DictProxyTests(unittest.TestCase): |
| def setUp(self): |
| class C(object): |
| def meth(self): |
| pass |
| self.C = C |
| |
| def test_iter_keys(self): |
| # Testing dict-proxy keys... |
| it = self.C.__dict__.keys() |
| self.assertNotIsInstance(it, list) |
| keys = list(it) |
| keys.sort() |
| self.assertEqual(keys, ['__dict__', '__doc__', '__module__', |
| '__weakref__', 'meth']) |
| |
| def test_iter_values(self): |
| # Testing dict-proxy values... |
| it = self.C.__dict__.values() |
| self.assertNotIsInstance(it, list) |
| values = list(it) |
| self.assertEqual(len(values), 5) |
| |
| def test_iter_items(self): |
| # Testing dict-proxy iteritems... |
| it = self.C.__dict__.items() |
| self.assertNotIsInstance(it, list) |
| keys = [item[0] for item in it] |
| keys.sort() |
| self.assertEqual(keys, ['__dict__', '__doc__', '__module__', |
| '__weakref__', 'meth']) |
| |
| def test_dict_type_with_metaclass(self): |
| # Testing type of __dict__ when metaclass set... |
| class B(object): |
| pass |
| class M(type): |
| pass |
| class C(metaclass=M): |
| # In 2.3a1, C.__dict__ was a real dict rather than a dict proxy |
| pass |
| self.assertEqual(type(C.__dict__), type(B.__dict__)) |
| |
| def test_repr(self): |
| # Testing dict_proxy.__repr__ |
| dict_ = {k: v for k, v in self.C.__dict__.items()} |
| self.assertEqual(repr(self.C.__dict__), 'dict_proxy({!r})'.format(dict_)) |
| |
| |
| class PTypesLongInitTest(unittest.TestCase): |
| # This is in its own TestCase so that it can be run before any other tests. |
| def test_pytype_long_ready(self): |
| # Testing SF bug 551412 ... |
| |
| # This dumps core when SF bug 551412 isn't fixed -- |
| # but only when test_descr.py is run separately. |
| # (That can't be helped -- as soon as PyType_Ready() |
| # is called for PyLong_Type, the bug is gone.) |
| class UserLong(object): |
| def __pow__(self, *args): |
| pass |
| try: |
| pow(0, UserLong(), 0) |
| except: |
| pass |
| |
| # Another segfault only when run early |
| # (before PyType_Ready(tuple) is called) |
| type.mro(tuple) |
| |
| |
| def test_main(): |
| # Run all local test cases, with PTypesLongInitTest first. |
| support.run_unittest(PTypesLongInitTest, OperatorsTest, |
| ClassPropertiesAndMethods, DictProxyTests) |
| |
| if __name__ == "__main__": |
| test_main() |