import unittest

from test import test_support

import UserDict, random, string

class DictTest(unittest.TestCase):

    def test_constructor(self):

        # calling built-in types without argument must return empty

        self.assertEqual(dict(), {})

        self.assert_(dict() is not {})

    def test_literal_constructor(self):

        # check literal constructor for different sized dicts (to exercise the BUILD_MAP oparg

        for n in (0, 1, 6, 256, 400):

            items = [(''.join([random.choice(string.letters)

                               for j in range(8)]),

                      i)

                     for i in range(n)]

            random.shuffle(items)

            dictliteral = '{' + ', '.join('%r: %d' % item for item in items) + '}'

            self.assertEqual(eval(dictliteral), dict(items))

    def test_bool(self):

        self.assert_(not {})

        self.assert_({1: 2})

        self.assert_(bool({}) is False)

        self.assert_(bool({1: 2}) is True)

    def test_keys(self):

        d = {}

        self.assertEqual(d.keys(), [])

        d = {'a': 1, 'b': 2}

        k = d.keys()

        self.assert_(d.has_key('a'))

        self.assert_(d.has_key('b'))

        self.assertRaises(TypeError, d.keys, None)

    def test_values(self):

        d = {}

        self.assertEqual(d.values(), [])

        d = {1:2}

        self.assertEqual(d.values(), [2])

        self.assertRaises(TypeError, d.values, None)

    def test_items(self):

        d = {}

        self.assertEqual(d.items(), [])

        d = {1:2}

        self.assertEqual(d.items(), [(1, 2)])

        self.assertRaises(TypeError, d.items, None)

    def test_has_key(self):

        d = {}

        self.assert_(not d.has_key('a'))

        d = {'a': 1, 'b': 2}

        k = d.keys()

        k.sort()

        self.assertEqual(k, ['a', 'b'])

        self.assertRaises(TypeError, d.has_key)

    def test_contains(self):

        d = {}

        self.assert_(not ('a' in d))

        self.assert_('a' not in d)

        d = {'a': 1, 'b': 2}

        self.assert_('a' in d)

        self.assert_('b' in d)

        self.assert_('c' not in d)

        self.assertRaises(TypeError, d.__contains__)

    def test_len(self):

        d = {}

        self.assertEqual(len(d), 0)

        d = {'a': 1, 'b': 2}

        self.assertEqual(len(d), 2)

    def test_getitem(self):

        d = {'a': 1, 'b': 2}

        self.assertEqual(d['a'], 1)

        self.assertEqual(d['b'], 2)

        d['c'] = 3

        d['a'] = 4

        self.assertEqual(d['c'], 3)

        self.assertEqual(d['a'], 4)

        del d['b']

        self.assertEqual(d, {'a': 4, 'c': 3})

        self.assertRaises(TypeError, d.__getitem__)

        class BadEq(object):

            def __eq__(self, other):

                raise Exc()

            def __hash__(self):

                return 24

        d = {}

        d[BadEq()] = 42

        self.assertRaises(KeyError, d.__getitem__, 23)

        class Exc(Exception): pass

        class BadHash(object):

            fail = False

            def __hash__(self):

                if self.fail:

                    raise Exc()

                else:

                    return 42

        x = BadHash()

        d[x] = 42

        x.fail = True

        self.assertRaises(Exc, d.__getitem__, x)

    def test_clear(self):

        d = {1:1, 2:2, 3:3}

        d.clear()

        self.assertEqual(d, {})

        self.assertRaises(TypeError, d.clear, None)

    def test_update(self):

        d = {}

        d.update({1:100})

        d.update({2:20})

        d.update({1:1, 2:2, 3:3})

        self.assertEqual(d, {1:1, 2:2, 3:3})

        d.update()

        self.assertEqual(d, {1:1, 2:2, 3:3})

        self.assertRaises((TypeError, AttributeError), d.update, None)

        class SimpleUserDict:

            def __init__(self):

                self.d = {1:1, 2:2, 3:3}

            def keys(self):

                return self.d.keys()

            def __getitem__(self, i):

                return self.d[i]

        d.clear()

        d.update(SimpleUserDict())

        self.assertEqual(d, {1:1, 2:2, 3:3})

        class Exc(Exception): pass

        d.clear()

        class FailingUserDict:

            def keys(self):

                raise Exc

        self.assertRaises(Exc, d.update, FailingUserDict())

        class FailingUserDict:

            def keys(self):

                class BogonIter:

                    def __init__(self):

                        self.i = 1

                    def __iter__(self):

                        return self

                    def next(self):

                        if self.i:

                            self.i = 0

                            return 'a'

                        raise Exc

                return BogonIter()

            def __getitem__(self, key):

                return key

        self.assertRaises(Exc, d.update, FailingUserDict())

        class FailingUserDict:

            def keys(self):

                class BogonIter:

                    def __init__(self):

                        self.i = ord('a')

                    def __iter__(self):

                        return self

                    def next(self):

                        if self.i <= ord('z'):

                            rtn = chr(self.i)

                            self.i += 1

                            return rtn

                        raise StopIteration

                return BogonIter()

            def __getitem__(self, key):

                raise Exc

        self.assertRaises(Exc, d.update, FailingUserDict())

        class badseq(object):

            def __iter__(self):

                return self

            def next(self):

                raise Exc()

        self.assertRaises(Exc, {}.update, badseq())

        self.assertRaises(ValueError, {}.update, [(1, 2, 3)])

    def test_fromkeys(self):

        self.assertEqual(dict.fromkeys('abc'), {'a':None, 'b':None, 'c':None})

        d = {}

        self.assert_(not(d.fromkeys('abc') is d))

        self.assertEqual(d.fromkeys('abc'), {'a':None, 'b':None, 'c':None})

        self.assertEqual(d.fromkeys((4,5),0), {4:0, 5:0})

        self.assertEqual(d.fromkeys([]), {})

        def g():

            yield 1

        self.assertEqual(d.fromkeys(g()), {1:None})

        self.assertRaises(TypeError, {}.fromkeys, 3)

        class dictlike(dict): pass

        self.assertEqual(dictlike.fromkeys('a'), {'a':None})

        self.assertEqual(dictlike().fromkeys('a'), {'a':None})

        self.assert_(type(dictlike.fromkeys('a')) is dictlike)

        self.assert_(type(dictlike().fromkeys('a')) is dictlike)

        class mydict(dict):

            def __new__(cls):

                return UserDict.UserDict()

        ud = mydict.fromkeys('ab')

        self.assertEqual(ud, {'a':None, 'b':None})

        self.assert_(isinstance(ud, UserDict.UserDict))

        self.assertRaises(TypeError, dict.fromkeys)

        class Exc(Exception): pass

        class baddict1(dict):

            def __init__(self):

                raise Exc()

        self.assertRaises(Exc, baddict1.fromkeys, [1])

        class BadSeq(object):

            def __iter__(self):

                return self

            def next(self):

                raise Exc()

        self.assertRaises(Exc, dict.fromkeys, BadSeq())

        class baddict2(dict):

            def __setitem__(self, key, value):

                raise Exc()

        self.assertRaises(Exc, baddict2.fromkeys, [1])

        # test fast path for dictionary inputs

        d = dict(zip(range(6), range(6)))

        self.assertEqual(dict.fromkeys(d, 0), dict(zip(range(6), [0]*6)))

    def test_copy(self):

        d = {1:1, 2:2, 3:3}

        self.assertEqual(d.copy(), {1:1, 2:2, 3:3})

        self.assertEqual({}.copy(), {})

        self.assertRaises(TypeError, d.copy, None)

    def test_get(self):

        d = {}

        self.assert_(d.get('c') is None)

        self.assertEqual(d.get('c', 3), 3)

        d = {'a' : 1, 'b' : 2}

        self.assert_(d.get('c') is None)

        self.assertEqual(d.get('c', 3), 3)

        self.assertEqual(d.get('a'), 1)

        self.assertEqual(d.get('a', 3), 1)

        self.assertRaises(TypeError, d.get)

        self.assertRaises(TypeError, d.get, None, None, None)

    def test_setdefault(self):

        # dict.setdefault()

        d = {}

        self.assert_(d.setdefault('key0') is None)

        d.setdefault('key0', [])

        self.assert_(d.setdefault('key0') is None)

        d.setdefault('key', []).append(3)

        self.assertEqual(d['key'][0], 3)

        d.setdefault('key', []).append(4)

        self.assertEqual(len(d['key']), 2)

        self.assertRaises(TypeError, d.setdefault)

        class Exc(Exception): pass

        class BadHash(object):

            fail = False

            def __hash__(self):

                if self.fail:

                    raise Exc()

                else:

                    return 42

        x = BadHash()

        d[x] = 42

        x.fail = True

        self.assertRaises(Exc, d.setdefault, x, [])

    def test_popitem(self):

        # dict.popitem()

        for copymode in -1, +1:

            # -1: b has same structure as a

            # +1: b is a.copy()

            for log2size in range(12):

                size = 2**log2size

                a = {}

                b = {}

                for i in range(size):

                    a[repr(i)] = i

                    if copymode < 0:

                        b[repr(i)] = i

                if copymode > 0:

                    b = a.copy()

                for i in range(size):

                    ka, va = ta = a.popitem()

                    self.assertEqual(va, int(ka))

                    kb, vb = tb = b.popitem()

                    self.assertEqual(vb, int(kb))

                    self.assert_(not(copymode < 0 and ta != tb))

                self.assert_(not a)

                self.assert_(not b)

        d = {}

        self.assertRaises(KeyError, d.popitem)

    def test_pop(self):

        # Tests for pop with specified key

        d = {}

        k, v = 'abc', 'def'

        d[k] = v

        self.assertRaises(KeyError, d.pop, 'ghi')

        self.assertEqual(d.pop(k), v)

        self.assertEqual(len(d), 0)

        self.assertRaises(KeyError, d.pop, k)

        # verify longs/ints get same value when key > 32 bits (for 64-bit archs)

        # see SF bug #689659

        x = 4503599627370496L

        y = 4503599627370496

        h = {x: 'anything', y: 'something else'}

        self.assertEqual(h[x], h[y])

        self.assertEqual(d.pop(k, v), v)

        d[k] = v

        self.assertEqual(d.pop(k, 1), v)

        self.assertRaises(TypeError, d.pop)

        class Exc(Exception): pass

        class BadHash(object):

            fail = False

            def __hash__(self):

                if self.fail:

                    raise Exc()

                else:

                    return 42

        x = BadHash()

        d[x] = 42

        x.fail = True

        self.assertRaises(Exc, d.pop, x)

    def test_mutatingiteration(self):

        d = {}

        d[1] = 1

        try:

            for i in d:

                d[i+1] = 1

        except RuntimeError:

            pass

        else:

            self.fail("changing dict size during iteration doesn't raise Error")

    def test_repr(self):

        d = {}

        self.assertEqual(repr(d), '{}')

        d[1] = 2

        self.assertEqual(repr(d), '{1: 2}')

        d = {}

        d[1] = d

        self.assertEqual(repr(d), '{1: {...}}')

        class Exc(Exception): pass

        class BadRepr(object):

            def __repr__(self):

                raise Exc()

        d = {1: BadRepr()}

        self.assertRaises(Exc, repr, d)

    def test_le(self):

        self.assert_(not ({} < {}))

        self.assert_(not ({1: 2} < {1L: 2L}))

        class Exc(Exception): pass

        class BadCmp(object):

            def __eq__(self, other):

                raise Exc()

            def __hash__(self):

                return 42

        d1 = {BadCmp(): 1}

        d2 = {1: 1}

        try:

            d1 < d2

        except Exc:

            pass

        else:

            self.fail("< didn't raise Exc")

    def test_missing(self):

        # Make sure dict doesn't have a __missing__ method

        self.assertEqual(hasattr(dict, "__missing__"), False)

        self.assertEqual(hasattr({}, "__missing__"), False)

        # Test several cases:

        # (D) subclass defines __missing__ method returning a value

        # (E) subclass defines __missing__ method raising RuntimeError

        # (F) subclass sets __missing__ instance variable (no effect)

        # (G) subclass doesn't define __missing__ at a all

        class D(dict):

            def __missing__(self, key):

                return 42

        d = D({1: 2, 3: 4})

        self.assertEqual(d[1], 2)

        self.assertEqual(d[3], 4)

        self.assert_(2 not in d)

        self.assert_(2 not in d.keys())

        self.assertEqual(d[2], 42)

        class E(dict):

            def __missing__(self, key):

                raise RuntimeError(key)

        e = E()

        try:

            e[42]

        except RuntimeError, err:

            self.assertEqual(err.args, (42,))

        else:

            self.fail("e[42] didn't raise RuntimeError")

        class F(dict):

            def __init__(self):

                # An instance variable __missing__ should have no effect

                self.__missing__ = lambda key: None

        f = F()

        try:

            f[42]

        except KeyError, err:

            self.assertEqual(err.args, (42,))

        else:

            self.fail("f[42] didn't raise KeyError")

        class G(dict):

            pass

        g = G()

        try:

            g[42]

        except KeyError, err:

            self.assertEqual(err.args, (42,))

        else:

            self.fail("g[42] didn't raise KeyError")

    def test_tuple_keyerror(self):

        # SF #1576657

        d = {}

        try:

            d[(1,)]

        except KeyError, e:

            self.assertEqual(e.args, ((1,),))

        else:

            self.fail("missing KeyError")

    def test_bad_key(self):

        # Dictionary lookups should fail if __cmp__() raises an exception.

        class CustomException(Exception):

            pass

        class BadDictKey:

            def __hash__(self):

                return hash(self.__class__)

            def __cmp__(self, other):

                if isinstance(other, self.__class__):

                    raise CustomException

                return other

        d = {}

        x1 = BadDictKey()

        x2 = BadDictKey()

        d[x1] = 1

        for stmt in ['d[x2] = 2',

                     'z = d[x2]',

                     'x2 in d',

                     'd.has_key(x2)',

                     'd.get(x2)',

                     'd.setdefault(x2, 42)',

                     'd.pop(x2)',

                     'd.update({x2: 2})']:

            try:

                exec stmt in locals()

            except CustomException:

                pass

            else:

                self.fail("Statement didn't raise exception")

    def test_resize1(self):

        # Dict resizing bug, found by Jack Jansen in 2.2 CVS development.

        # This version got an assert failure in debug build, infinite loop in

        # release build.  Unfortunately, provoking this kind of stuff requires

        # a mix of inserts and deletes hitting exactly the right hash codes in

        # exactly the right order, and I can't think of a randomized approach

        # that would be *likely* to hit a failing case in reasonable time.

        d = {}

        for i in range(5):

            d[i] = i

        for i in range(5):

            del d[i]

        for i in range(5, 9):  # i==8 was the problem

            d[i] = i

    def test_resize2(self):

        # Another dict resizing bug (SF bug #1456209).

        # This caused Segmentation faults or Illegal instructions.