pypy / pypy / objspace / std / test / test_obj.py

from __future__ import with_statement
from pypy.conftest import option

class AppTestObject:

    def setup_class(cls):
        from pypy.interpreter import gateway
        import sys

        cpython_behavior = (not option.runappdirect
                            or not hasattr(sys, 'pypy_translation_info'))

        space = cls.space
        cls.w_cpython_behavior = space.wrap(cpython_behavior)
        cls.w_cpython_version = space.wrap(tuple(sys.version_info))
        cls.w_appdirect = space.wrap(option.runappdirect)
        cls.w_cpython_apptest = space.wrap(option.runappdirect and not hasattr(sys, 'pypy_translation_info'))

        def w_unwrap_wrap_unicode(space, w_obj):
            return space.wrap(space.unicode_w(w_obj))
        cls.w_unwrap_wrap_unicode = space.wrap(gateway.interp2app(w_unwrap_wrap_unicode))
        def w_unwrap_wrap_str(space, w_obj):
            return space.wrap(space.str_w(w_obj))
        cls.w_unwrap_wrap_str = space.wrap(gateway.interp2app(w_unwrap_wrap_str))

    def test_hash_builtin(self):
        if not self.cpython_behavior:
            skip("on pypy-c id == hash is not guaranteed")
        if self.cpython_version >= (2, 7):
            skip("on CPython >= 2.7, id != hash")
        import sys
        o = object()
        assert (hash(o) & sys.maxint) == (id(o) & sys.maxint)

    def test_hash_method(self):
        o = object()
        assert hash(o) == o.__hash__()

    def test_hash_list(self):
        l = range(5)
        raises(TypeError, hash, l)

    def test_no_getnewargs(self):
        o = object()
        assert not hasattr(o, '__getnewargs__')

    def test_hash_subclass(self):
        import sys
        class X(object):
            pass
        x = X()
        if self.cpython_behavior and self.cpython_version < (2, 7):
            assert (hash(x) & sys.maxint) == (id(x) & sys.maxint)
        assert hash(x) == object.__hash__(x)

    def test_reduce_recursion_bug(self):
        class X(object):
            def __reduce__(self):
                return object.__reduce__(self) + (':-)',)
        s = X().__reduce__()
        assert s[-1] == ':-)'

    def test_default_format(self):
        class x(object):
            def __str__(self):
                return "Pickle"
            def __unicode__(self):
                return u"Cheese"
        res = format(x())
        assert res == "Pickle"
        assert isinstance(res, str)
        res = format(x(), u"")
        assert res == u"Cheese"
        assert isinstance(res, unicode)
        del x.__unicode__
        res = format(x(), u"")
        assert res == u"Pickle"
        assert isinstance(res, unicode)

    def test_subclasshook(self):
        class x(object):
            pass
        assert x().__subclasshook__(object()) is NotImplemented
        assert x.__subclasshook__(object()) is NotImplemented

    def test_object_init(self):
        import warnings

        class A(object):
            pass

        raises(TypeError, A().__init__, 3)
        raises(TypeError, A().__init__, a=3)

        class B(object):
            def __new__(cls):
                return super(B, cls).__new__(cls)

            def __init__(self):
                super(B, self).__init__(a=3)

        #-- pypy doesn't raise the DeprecationWarning
        #with warnings.catch_warnings(record=True) as log:
        #    warnings.simplefilter("always", DeprecationWarning)
        #    B()
        #assert len(log) == 1
        #assert log[0].message.args == ("object.__init__() takes no parameters",)
        #assert type(log[0].message) is DeprecationWarning

    def test_object_str(self):
        # obscure case: __str__() must delegate to __repr__() without adding
        # type checking on its own
        class A(object):
            def __repr__(self):
                return 123456
        assert A().__str__() == 123456


    def test_is_on_primitives(self):
        if self.cpython_apptest:
            skip("cpython behaves differently")
        assert 1 is 1
        x = 1000000
        assert x + 1 is int(str(x + 1))
        assert 1 is not 1.0
        assert 1 is not 1l
        assert 1l is not 1.0
        assert 1.1 is 1.1
        assert 0.0 is not -0.0
        for x in range(10):
            assert x + 0.1 is x + 0.1
        for x in range(10):
            assert x + 1L is x + 1L
        for x in range(10):
            assert x+1j is x+1j
            assert 1+x*1j is 1+x*1j
        l = [1]
        assert l[0] is l[0]

    def test_is_on_strs(self):
        if self.appdirect:
            skip("cannot run this test as apptest")
        l = ["a"]
        assert l[0] is l[0]
        u = u"a"
        assert self.unwrap_wrap_unicode(u) is u
        s = "a"
        assert self.unwrap_wrap_str(s) is s

    def test_is_on_subclasses(self):
        for typ in [int, long, float, complex, str, unicode]:
            class mytyp(typ):
                pass
            if not self.cpython_apptest and typ not in (str, unicode):
                assert typ(42) is typ(42)
            assert mytyp(42) is not mytyp(42)
            assert mytyp(42) is not typ(42)
            assert typ(42) is not mytyp(42)
            x = mytyp(42)
            assert x is x
            assert x is not "43"
            assert x is not None
            assert "43" is not x
            assert None is not x
            x = typ(42)
            assert x is x
            assert x is not "43"
            assert x is not None
            assert "43" is not x
            assert None is not x

    def test_id_on_primitives(self):
        if self.cpython_apptest:
            skip("cpython behaves differently")
        assert id(1) == (1 << 3) + 1
        assert id(1l) == (1 << 3) + 3
        class myint(int):
            pass
        assert id(myint(1)) != id(1)

        assert id(1.0) & 7 == 5
        assert id(-0.0) != id(0.0)
        assert hex(id(2.0)) == '0x20000000000000005L'
        assert id(0.0) == 5

    def test_id_on_strs(self):
        if self.appdirect:
            skip("cannot run this test as apptest")
        u = u"a"
        assert id(self.unwrap_wrap_unicode(u)) == id(u)
        s = "a"
        assert id(self.unwrap_wrap_str(s)) == id(s)

    def test_identity_vs_id_primitives(self):
        if self.cpython_apptest:
            skip("cpython behaves differently")
        import sys
        l = range(-10, 10)
        for i in range(10):
            l.append(float(i))
            l.append(i + 0.1)
            l.append(long(i))
            l.append(i + sys.maxint)
            l.append(i - sys.maxint)
            l.append(i + 1j)
            l.append(i - 1j)
            l.append(1 + i * 1j)
            l.append(1 - i * 1j)
            s = str(i)
            l.append(s)
            u = unicode(s)
            l.append(u)
        l.append(-0.0)
        l.append(None)
        l.append(True)
        l.append(False)
        s = "s"
        l.append(s)
        s = u"s"
        l.append(s)

        for i, a in enumerate(l):
            for b in l[i:]:
                assert (a is b) == (id(a) == id(b))
                if a is b:
                    assert a == b

    def test_identity_vs_id_str(self):
        if self.appdirect:
            skip("cannot run this test as apptest")
        import sys
        l = range(-10, 10)
        for i in range(10):
            s = str(i)
            l.append(s)
            l.append(self.unwrap_wrap_str(s))
            u = unicode(s)
            l.append(u)
            l.append(self.unwrap_wrap_unicode(u))
        s = "s"
        l.append(s)
        l.append(self.unwrap_wrap_str(s))
        s = u"s"
        l.append(s)
        l.append(self.unwrap_wrap_unicode(s))

        for i, a in enumerate(l):
            for b in l[i:]:
                assert (a is b) == (id(a) == id(b))
                if a is b:
                    assert a == b

    def test_identity_bug(self):
        x = 0x4000000000000000L
        y = 2j
        assert id(x) != id(y)

    def test_object_hash_immutable(self):
        x = 42
        y = 40
        y += 2
        assert object.__hash__(x) == object.__hash__(y)


def test_isinstance_shortcut():
    from pypy.objspace.std import objspace
    space = objspace.StdObjSpace()
    w_a = space.wrap("a")
    space.type = None
    # if it crashes, it means that space._type_isinstance didn't go through
    # the fast path, and tries to call type() (which is set to None just
    # above)
    space.isinstance_w(w_a, space.w_str) # does not crash
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