# Check every path through every method of UserDict

import unittest

from test import test_support, mapping_tests

import UserDict

d0 = {}

d1 = {"one": 1}

d2 = {"one": 1, "two": 2}

d3 = {"one": 1, "two": 3, "three": 5}

d4 = {"one": None, "two": None}

d5 = {"one": 1, "two": 1}

class UserDictTest(mapping_tests.TestHashMappingProtocol):

    type2test = UserDict.IterableUserDict

    def test_all(self):

        # Test constructors

        u = UserDict.UserDict()

        u0 = UserDict.UserDict(d0)

        u1 = UserDict.UserDict(d1)

        u2 = UserDict.IterableUserDict(d2)

        uu = UserDict.UserDict(u)

        uu0 = UserDict.UserDict(u0)

        uu1 = UserDict.UserDict(u1)

        uu2 = UserDict.UserDict(u2)

        # keyword arg constructor

        self.assertEqual(UserDict.UserDict(one=1, two=2), d2)

        # item sequence constructor

        self.assertEqual(UserDict.UserDict([('one',1), ('two',2)]), d2)

        self.assertEqual(UserDict.UserDict(dict=[('one',1), ('two',2)]), d2)

        # both together

        self.assertEqual(UserDict.UserDict([('one',1), ('two',2)], two=3, three=5), d3)

        # alternate constructor

        self.assertEqual(UserDict.UserDict.fromkeys('one two'.split()), d4)

        self.assertEqual(UserDict.UserDict().fromkeys('one two'.split()), d4)

        self.assertEqual(UserDict.UserDict.fromkeys('one two'.split(), 1), d5)

        self.assertEqual(UserDict.UserDict().fromkeys('one two'.split(), 1), d5)

        self.assert_(u1.fromkeys('one two'.split()) is not u1)

        self.assert_(isinstance(u1.fromkeys('one two'.split()), UserDict.UserDict))

        self.assert_(isinstance(u2.fromkeys('one two'.split()), UserDict.IterableUserDict))

        # Test __repr__

        self.assertEqual(str(u0), str(d0))

        self.assertEqual(repr(u1), repr(d1))

        self.assertEqual(`u2`, `d2`)

        # Test __cmp__ and __len__

        all = [d0, d1, d2, u, u0, u1, u2, uu, uu0, uu1, uu2]

        for a in all:

            for b in all:

                self.assertEqual(cmp(a, b), cmp(len(a), len(b)))

        # Test __getitem__

        self.assertEqual(u2["one"], 1)

        self.assertRaises(KeyError, u1.__getitem__, "two")

        # Test __setitem__

        u3 = UserDict.UserDict(u2)

        u3["two"] = 2

        u3["three"] = 3

        # Test __delitem__

        del u3["three"]

        self.assertRaises(KeyError, u3.__delitem__, "three")

        # Test clear

        u3.clear()

        self.assertEqual(u3, {})

        # Test copy()

        u2a = u2.copy()

        self.assertEqual(u2a, u2)

        u2b = UserDict.UserDict(x=42, y=23)

        u2c = u2b.copy() # making a copy of a UserDict is special cased

        self.assertEqual(u2b, u2c)

        class MyUserDict(UserDict.UserDict):

            def display(self): print self

        m2 = MyUserDict(u2)

        m2a = m2.copy()

        self.assertEqual(m2a, m2)

        # SF bug #476616 -- copy() of UserDict subclass shared data

        m2['foo'] = 'bar'

        self.assertNotEqual(m2a, m2)

        # Test keys, items, values

        self.assertEqual(u2.keys(), d2.keys())

        self.assertEqual(u2.items(), d2.items())

        self.assertEqual(u2.values(), d2.values())

        # Test has_key and "in".

        for i in u2.keys():

            self.assert_(u2.has_key(i))

            self.assert_(i in u2)

            self.assertEqual(u1.has_key(i), d1.has_key(i))

            self.assertEqual(i in u1, i in d1)

            self.assertEqual(u0.has_key(i), d0.has_key(i))

            self.assertEqual(i in u0, i in d0)

        # Test update

        t = UserDict.UserDict()

        t.update(u2)

        self.assertEqual(t, u2)

        class Items:

            def items(self):

                return (("x", 42), ("y", 23))

        t = UserDict.UserDict()

        t.update(Items())

        self.assertEqual(t, {"x": 42, "y": 23})

        # Test get

        for i in u2.keys():

            self.assertEqual(u2.get(i), u2[i])

            self.assertEqual(u1.get(i), d1.get(i))

            self.assertEqual(u0.get(i), d0.get(i))

        # Test "in" iteration.

        for i in xrange(20):

            u2[i] = str(i)

        ikeys = []

        for k in u2:

            ikeys.append(k)

        keys = u2.keys()

        self.assertEqual(set(ikeys), set(keys))

        # Test setdefault

        t = UserDict.UserDict()

        self.assertEqual(t.setdefault("x", 42), 42)

        self.assert_(t.has_key("x"))

        self.assertEqual(t.setdefault("x", 23), 42)

        # Test pop

        t = UserDict.UserDict(x=42)

        self.assertEqual(t.pop("x"), 42)

        self.assertRaises(KeyError, t.pop, "x")

        self.assertEqual(t.pop("x", 1), 1)

        t["x"] = 42

        self.assertEqual(t.pop("x", 1), 42)

        # Test popitem

        t = UserDict.UserDict(x=42)

        self.assertEqual(t.popitem(), ("x", 42))

        self.assertRaises(KeyError, t.popitem)

    def test_missing(self):

        # Make sure UserDict doesn't have a __missing__ method

        self.assertEqual(hasattr(UserDict, "__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(UserDict.UserDict):

            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(UserDict.UserDict):

            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(UserDict.UserDict):

            def __init__(self):

                # An instance variable __missing__ should have no effect

                self.__missing__ = lambda key: None

                UserDict.UserDict.__init__(self)

        f = F()

        try:

            f[42]

        except KeyError, err:

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

        else:

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

        class G(UserDict.UserDict):

            pass

        g = G()

        try:

            g[42]

        except KeyError, err:

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

        else:

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

##########################

# Test Dict Mixin

class SeqDict(UserDict.DictMixin):

    """Dictionary lookalike implemented with lists.

    Used to test and demonstrate DictMixin

    """

    def __init__(self, other=None, **kwargs):

        self.keylist = []

        self.valuelist = []

        if other is not None:

            for (key, value) in other:

                self[key] = value

        for (key, value) in kwargs.iteritems():

            self[key] = value

    def __getitem__(self, key):

        try:

            i = self.keylist.index(key)

        except ValueError:

            raise KeyError

        return self.valuelist[i]

    def __setitem__(self, key, value):

        try:

            i = self.keylist.index(key)

            self.valuelist[i] = value

        except ValueError:

            self.keylist.append(key)

            self.valuelist.append(value)

    def __delitem__(self, key):

        try:

            i = self.keylist.index(key)

        except ValueError:

            raise KeyError

        self.keylist.pop(i)

        self.valuelist.pop(i)

    def keys(self):

        return list(self.keylist)

    def copy(self):

        d = self.__class__()

        for key, value in self.iteritems():

            d[key] = value

        return d

    @classmethod

    def fromkeys(cls, keys, value=None):

        d = cls()

        for key in keys:

            d[key] = value

        return d

class UserDictMixinTest(mapping_tests.TestMappingProtocol):

    type2test = SeqDict

    def test_all(self):

        ## Setup test and verify working of the test class

        # check init

        s = SeqDict()

        # exercise setitem

        s[10] = 'ten'

        s[20] = 'twenty'

        s[30] = 'thirty'

        # exercise delitem

        del s[20]

        # check getitem and setitem

        self.assertEqual(s[10], 'ten')

        # check keys() and delitem

        self.assertEqual(s.keys(), [10, 30])

        ## Now, test the DictMixin methods one by one

        # has_key

        self.assert_(s.has_key(10))

        self.assert_(not s.has_key(20))

        # __contains__

        self.assert_(10 in s)

        self.assert_(20 not in s)

        # __iter__

        self.assertEqual([k for k in s], [10, 30])

        # __len__

        self.assertEqual(len(s), 2)

        # iteritems

        self.assertEqual(list(s.iteritems()), [(10,'ten'), (30, 'thirty')])

        # iterkeys

        self.assertEqual(list(s.iterkeys()), [10, 30])

        # itervalues

        self.assertEqual(list(s.itervalues()), ['ten', 'thirty'])

        # values

        self.assertEqual(s.values(), ['ten', 'thirty'])

        # items

        self.assertEqual(s.items(), [(10,'ten'), (30, 'thirty')])

        # get

        self.assertEqual(s.get(10), 'ten')

        self.assertEqual(s.get(15,'fifteen'), 'fifteen')

        self.assertEqual(s.get(15), None)

        # setdefault

        self.assertEqual(s.setdefault(40, 'forty'), 'forty')

        self.assertEqual(s.setdefault(10, 'null'), 'ten')

        del s[40]

        # pop

        self.assertEqual(s.pop(10), 'ten')

        self.assert_(10 not in s)

        s[10] = 'ten'

        self.assertEqual(s.pop("x", 1), 1)

        s["x"] = 42

        self.assertEqual(s.pop("x", 1), 42)

        # popitem

        k, v = s.popitem()

        self.assert_(k not in s)

        s[k] = v

        # clear

        s.clear()

        self.assertEqual(len(s), 0)

        # empty popitem

        self.assertRaises(KeyError, s.popitem)

        # update

        s.update({10: 'ten', 20:'twenty'})

        self.assertEqual(s[10], 'ten')

        self.assertEqual(s[20], 'twenty')

        # cmp

        self.assertEqual(s, {10: 'ten', 20:'twenty'})

        t = SeqDict()

        t[20] = 'twenty'

        t[10] = 'ten'

        self.assertEqual(s, t)

def test_main():

    test_support.run_unittest(

        UserDictTest,

        UserDictMixinTest

    )

if __name__ == "__main__":

    test_main()